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-rw-r--r--pkgs/applications/accessibility/contrast/default.nix2
-rw-r--r--pkgs/applications/audio/cadence/default.nix3
-rw-r--r--pkgs/applications/audio/clementine/default.nix2
-rw-r--r--pkgs/applications/audio/cozy-audiobooks/default.nix2
-rw-r--r--pkgs/applications/audio/curseradio/default.nix2
-rw-r--r--pkgs/applications/audio/dfasma/default.nix2
-rw-r--r--pkgs/applications/audio/dr14_tmeter/default.nix2
-rw-r--r--pkgs/applications/audio/faust/faust2jackrust.nix3
-rw-r--r--pkgs/applications/audio/fmit/default.nix2
-rw-r--r--pkgs/applications/audio/gnome-podcasts/default.nix2
-rw-r--r--pkgs/applications/audio/gpodder/default.nix2
-rw-r--r--pkgs/applications/audio/greg/default.nix2
-rw-r--r--pkgs/applications/audio/gtklick/default.nix2
-rw-r--r--pkgs/applications/audio/jamulus/default.nix2
-rw-r--r--pkgs/applications/audio/librespot/default.nix2
-rw-r--r--pkgs/applications/audio/lmms/default.nix2
-rw-r--r--pkgs/applications/audio/mimms/default.nix2
-rw-r--r--pkgs/applications/audio/mixxx/default.nix2
-rw-r--r--pkgs/applications/audio/mopidy/gmusic.nix2
-rw-r--r--pkgs/applications/audio/mopidy/iris.nix2
-rw-r--r--pkgs/applications/audio/mopidy/moped.nix2
-rw-r--r--pkgs/applications/audio/mopidy/mopify.nix2
-rw-r--r--pkgs/applications/audio/mopidy/mpd.nix2
-rw-r--r--pkgs/applications/audio/mopidy/mpris.nix2
-rw-r--r--pkgs/applications/audio/mopidy/scrobbler.nix2
-rw-r--r--pkgs/applications/audio/mopidy/somafm.nix2
-rw-r--r--pkgs/applications/audio/mopidy/soundcloud.nix2
-rw-r--r--pkgs/applications/audio/mopidy/spotify-tunigo.nix2
-rw-r--r--pkgs/applications/audio/mopidy/spotify.nix2
-rw-r--r--pkgs/applications/audio/mopidy/tunein.nix2
-rw-r--r--pkgs/applications/audio/mopidy/youtube.nix2
-rw-r--r--pkgs/applications/audio/munt/default.nix2
-rw-r--r--pkgs/applications/audio/musescore/default.nix2
-rw-r--r--pkgs/applications/audio/noisetorch/default.nix2
-rw-r--r--pkgs/applications/audio/padthv1/default.nix2
-rw-r--r--pkgs/applications/audio/picard/default.nix2
-rw-r--r--pkgs/applications/audio/pithos/default.nix2
-rw-r--r--pkgs/applications/audio/polyphone/default.nix2
-rw-r--r--pkgs/applications/audio/puddletag/default.nix2
-rw-r--r--pkgs/applications/audio/pulseaudio-dlna/default.nix2
-rw-r--r--pkgs/applications/audio/pulseaudio-dlna/zeroconf.nix2
-rw-r--r--pkgs/applications/audio/qjackctl/default.nix2
-rw-r--r--pkgs/applications/audio/qmmp/default.nix2
-rw-r--r--pkgs/applications/audio/qsampler/default.nix2
-rw-r--r--pkgs/applications/audio/qsynth/default.nix2
-rw-r--r--pkgs/applications/audio/qtractor/default.nix2
-rw-r--r--pkgs/applications/audio/shortwave/default.nix2
-rw-r--r--pkgs/applications/audio/sonata/default.nix2
-rw-r--r--pkgs/applications/audio/spotify-cli-linux/default.nix2
-rw-r--r--pkgs/applications/audio/synthv1/default.nix2
-rw-r--r--pkgs/applications/audio/traverso/default.nix2
-rw-r--r--pkgs/applications/audio/whipper/default.nix2
-rw-r--r--pkgs/applications/blockchains/ethabi.nix2
-rw-r--r--pkgs/applications/blockchains/ledger-live-desktop/default.nix2
-rw-r--r--pkgs/applications/blockchains/quorum.nix2
-rw-r--r--pkgs/applications/blockchains/turbo-geth.nix2
-rw-r--r--pkgs/applications/editors/emacs-modes/sv-kalender/default.nix2
-rw-r--r--pkgs/applications/editors/featherpad/default.nix2
-rw-r--r--pkgs/applications/editors/focuswriter/default.nix2
-rw-r--r--pkgs/applications/editors/hecate/default.nix2
-rw-r--r--pkgs/applications/editors/hexdino/default.nix2
-rw-r--r--pkgs/applications/editors/kibi/default.nix2
-rw-r--r--pkgs/applications/editors/manuskript/default.nix2
-rw-r--r--pkgs/applications/editors/mindforger/default.nix2
-rw-r--r--pkgs/applications/editors/neovim/gnvim/default.nix2
-rw-r--r--pkgs/applications/editors/neovim/neovim-remote.nix2
-rw-r--r--pkgs/applications/editors/okteta/default.nix2
-rw-r--r--pkgs/applications/editors/retext/default.nix2
-rw-r--r--pkgs/applications/editors/sigil/default.nix2
-rw-r--r--pkgs/applications/editors/texmacs/common.nix2
-rw-r--r--pkgs/applications/editors/thonny/default.nix2
-rw-r--r--pkgs/applications/editors/tiled/default.nix2
-rw-r--r--pkgs/applications/graphics/displaycal/default.nix2
-rw-r--r--pkgs/applications/graphics/dosage/default.nix2
-rw-r--r--pkgs/applications/graphics/freecad/default.nix2
-rw-r--r--pkgs/applications/graphics/gimp/wrapper.nix2
-rw-r--r--pkgs/applications/graphics/gscan2pdf/default.nix2
-rw-r--r--pkgs/applications/graphics/hydrus/default.nix2
-rw-r--r--pkgs/applications/graphics/ipe/default.nix2
-rw-r--r--pkgs/applications/graphics/kgraphviewer/default.nix2
-rw-r--r--pkgs/applications/graphics/krop/default.nix2
-rw-r--r--pkgs/applications/graphics/luminance-hdr/default.nix2
-rw-r--r--pkgs/applications/graphics/mcomix3/default.nix3
-rw-r--r--pkgs/applications/graphics/meme/default.nix2
-rw-r--r--pkgs/applications/graphics/mypaint/default.nix2
-rw-r--r--pkgs/applications/graphics/nomacs/default.nix2
-rw-r--r--pkgs/applications/graphics/paraview/default.nix2
-rw-r--r--pkgs/applications/graphics/pdfcpu/default.nix2
-rw-r--r--pkgs/applications/graphics/photoflare/default.nix2
-rw-r--r--pkgs/applications/graphics/photoqt/default.nix2
-rw-r--r--pkgs/applications/graphics/phototonic/default.nix2
-rw-r--r--pkgs/applications/graphics/pick-colour-picker/default.nix2
-rw-r--r--pkgs/applications/graphics/pinta/default.nix2
-rw-r--r--pkgs/applications/graphics/qcomicbook/default.nix2
-rw-r--r--pkgs/applications/graphics/rapid-photo-downloader/default.nix2
-rw-r--r--pkgs/applications/graphics/renderdoc/default.nix2
-rw-r--r--pkgs/applications/graphics/scantailor/advanced.nix2
-rw-r--r--pkgs/applications/graphics/tesseract/wrapper.nix2
-rw-r--r--pkgs/applications/logging/humioctl/default.nix2
-rw-r--r--pkgs/applications/misc/antfs-cli/default.nix2
-rw-r--r--pkgs/applications/misc/ape/apeclex.nix2
-rw-r--r--pkgs/applications/misc/archivy/default.nix2
-rw-r--r--pkgs/applications/misc/ausweisapp2/default.nix2
-rw-r--r--pkgs/applications/misc/autospotting/default.nix2
-rw-r--r--pkgs/applications/misc/barrier/default.nix2
-rw-r--r--pkgs/applications/misc/bibletime/default.nix2
-rw-r--r--pkgs/applications/misc/bleachbit/default.nix2
-rw-r--r--pkgs/applications/misc/break-time/default.nix2
-rw-r--r--pkgs/applications/misc/buku/default.nix2
-rw-r--r--pkgs/applications/misc/candle/default.nix2
-rw-r--r--pkgs/applications/misc/cheat/default.nix2
-rw-r--r--pkgs/applications/misc/chewing-editor/default.nix2
-rw-r--r--pkgs/applications/misc/coursera-dl/default.nix2
-rw-r--r--pkgs/applications/misc/crow-translate/default.nix2
-rw-r--r--pkgs/applications/misc/cum/default.nix2
-rw-r--r--pkgs/applications/misc/cura/lulzbot/libarcus.nix2
-rw-r--r--pkgs/applications/misc/cura/lulzbot/libsavitar.nix2
-rw-r--r--pkgs/applications/misc/cura/lulzbot/uranium.nix2
-rw-r--r--pkgs/applications/misc/dasel/default.nix2
-rw-r--r--pkgs/applications/misc/devdocs-desktop/default.nix2
-rw-r--r--pkgs/applications/misc/dfilemanager/default.nix2
-rw-r--r--pkgs/applications/misc/diffpdf/default.nix2
-rw-r--r--pkgs/applications/misc/dmensamenu/default.nix2
-rw-r--r--pkgs/applications/misc/dockbarx/default.nix2
-rw-r--r--pkgs/applications/misc/dotfiles/default.nix2
-rw-r--r--pkgs/applications/misc/dstask/default.nix2
-rw-r--r--pkgs/applications/misc/dupeguru/default.nix2
-rw-r--r--pkgs/applications/misc/electrum/dash.nix2
-rw-r--r--pkgs/applications/misc/electrum/ltc.nix2
-rw-r--r--pkgs/applications/misc/elfx86exts/default.nix2
-rw-r--r--pkgs/applications/misc/exercism/default.nix2
-rw-r--r--pkgs/applications/misc/expenses/default.nix2
-rw-r--r--pkgs/applications/misc/fbmenugen/default.nix2
-rw-r--r--pkgs/applications/misc/geoipupdate/default.nix2
-rw-r--r--pkgs/applications/misc/get_iplayer/default.nix2
-rw-r--r--pkgs/applications/misc/go-jira/default.nix2
-rw-r--r--pkgs/applications/misc/golden-cheetah/default.nix2
-rw-r--r--pkgs/applications/misc/gpsbabel/gui.nix2
-rw-r--r--pkgs/applications/misc/gramps/default.nix2
-rw-r--r--pkgs/applications/misc/gsctl/default.nix2
-rw-r--r--pkgs/applications/misc/hamster/default.nix2
-rw-r--r--pkgs/applications/misc/haxor-news/default.nix2
-rw-r--r--pkgs/applications/misc/hivemind/default.nix2
-rw-r--r--pkgs/applications/misc/hugo/default.nix2
-rw-r--r--pkgs/applications/misc/jrnl/default.nix2
-rw-r--r--pkgs/applications/misc/k4dirstat/default.nix2
-rw-r--r--pkgs/applications/misc/keepass/default.nix2
-rw-r--r--pkgs/applications/misc/khard/default.nix2
-rw-r--r--pkgs/applications/misc/kondo/default.nix2
-rw-r--r--pkgs/applications/misc/kupfer/default.nix2
-rw-r--r--pkgs/applications/misc/loxodo/default.nix2
-rw-r--r--pkgs/applications/misc/madonctl/default.nix2
-rw-r--r--pkgs/applications/misc/mediaelch/default.nix2
-rw-r--r--pkgs/applications/misc/menumaker/default.nix2
-rw-r--r--pkgs/applications/misc/mop/default.nix2
-rw-r--r--pkgs/applications/misc/mqtt-bench/default.nix2
-rw-r--r--pkgs/applications/misc/multibootusb/default.nix2
-rw-r--r--pkgs/applications/misc/nixnote2/default.nix2
-rw-r--r--pkgs/applications/misc/ocropus/default.nix2
-rw-r--r--pkgs/applications/misc/onboard/default.nix2
-rw-r--r--pkgs/applications/misc/opentx/default.nix2
-rw-r--r--pkgs/applications/misc/orca/default.nix2
-rw-r--r--pkgs/applications/misc/pass-secret-service/default.nix2
-rw-r--r--pkgs/applications/misc/pdf-quench/default.nix2
-rw-r--r--pkgs/applications/misc/pdfarranger/default.nix2
-rw-r--r--pkgs/applications/misc/pdfdiff/default.nix2
-rw-r--r--pkgs/applications/misc/pgmodeler/default.nix3
-rw-r--r--pkgs/applications/misc/pipr/default.nix3
-rw-r--r--pkgs/applications/misc/plover/default.nix2
-rw-r--r--pkgs/applications/misc/prevo/default.nix2
-rw-r--r--pkgs/applications/misc/printrun/default.nix2
-rw-r--r--pkgs/applications/misc/pydf/default.nix2
-rw-r--r--pkgs/applications/misc/pyditz/cerberus.nix2
-rw-r--r--pkgs/applications/misc/pyditz/default.nix2
-rw-r--r--pkgs/applications/misc/pytrainer/default.nix2
-rw-r--r--pkgs/applications/misc/qdirstat/default.nix2
-rw-r--r--pkgs/applications/misc/qlcplus/default.nix2
-rw-r--r--pkgs/applications/misc/qpdfview/default.nix2
-rw-r--r--pkgs/applications/misc/qsudo/default.nix2
-rw-r--r--pkgs/applications/misc/qt-box-editor/default.nix2
-rw-r--r--pkgs/applications/misc/qtbitcointrader/default.nix2
-rw-r--r--pkgs/applications/misc/ranger/default.nix2
-rw-r--r--pkgs/applications/misc/remarkable/remarkable-mouse/default.nix2
-rw-r--r--pkgs/applications/misc/remarkable/rmapi/default.nix2
-rw-r--r--pkgs/applications/misc/remarkable/rmview/default.nix2
-rw-r--r--pkgs/applications/misc/rsclock/default.nix2
-rw-r--r--pkgs/applications/misc/rss-bridge-cli/default.nix2
-rw-r--r--pkgs/applications/misc/rtv/default.nix2
-rw-r--r--pkgs/applications/misc/snapper-gui/default.nix2
-rw-r--r--pkgs/applications/misc/syncthing-tray/default.nix2
-rw-r--r--pkgs/applications/misc/taskwarrior-tui/default.nix2
-rw-r--r--pkgs/applications/misc/termdown/default.nix2
-rw-r--r--pkgs/applications/misc/terminal-parrot/default.nix2
-rw-r--r--pkgs/applications/misc/termpdf.py/default.nix2
-rw-r--r--pkgs/applications/misc/tickrs/default.nix2
-rw-r--r--pkgs/applications/misc/tipp10/default.nix2
-rw-r--r--pkgs/applications/misc/todiff/default.nix2
-rw-r--r--pkgs/applications/misc/toot/default.nix2
-rw-r--r--pkgs/applications/misc/topydo/default.nix2
-rw-r--r--pkgs/applications/misc/tty-share/default.nix2
-rw-r--r--pkgs/applications/misc/tut/default.nix2
-rw-r--r--pkgs/applications/misc/tzupdate/default.nix2
-rw-r--r--pkgs/applications/misc/udiskie/default.nix2
-rw-r--r--pkgs/applications/misc/ulauncher/default.nix2
-rw-r--r--pkgs/applications/misc/urlscan/default.nix2
-rw-r--r--pkgs/applications/misc/valentina/default.nix2
-rw-r--r--pkgs/applications/misc/vym/default.nix2
-rw-r--r--pkgs/applications/misc/wego/default.nix2
-rw-r--r--pkgs/applications/misc/wikicurses/default.nix2
-rw-r--r--pkgs/applications/misc/xdgmenumaker/default.nix2
-rw-r--r--pkgs/applications/misc/yokadi/default.nix2
-rw-r--r--pkgs/applications/misc/zk-shell/default.nix2
-rw-r--r--pkgs/applications/misc/zscroll/default.nix2
-rw-r--r--pkgs/applications/networking/brig/default.nix2
-rw-r--r--pkgs/applications/networking/browsers/browsh/default.nix2
-rw-r--r--pkgs/applications/networking/browsers/castor/default.nix2
-rw-r--r--pkgs/applications/networking/browsers/chromium/browser.nix2
-rw-r--r--pkgs/applications/networking/browsers/eolie/default.nix2
-rw-r--r--pkgs/applications/networking/browsers/qutebrowser/default.nix2
-rw-r--r--pkgs/applications/networking/c14/default.nix2
-rw-r--r--pkgs/applications/networking/cloudflared/default.nix2
-rw-r--r--pkgs/applications/networking/cluster/atlantis/default.nix2
-rw-r--r--pkgs/applications/networking/cluster/docker-machine/default.nix2
-rw-r--r--pkgs/applications/networking/cluster/docker-machine/kvm.nix2
-rw-r--r--pkgs/applications/networking/cluster/fluxcd/default.nix2
-rw-r--r--pkgs/applications/networking/cluster/fluxctl/default.nix2
-rw-r--r--pkgs/applications/networking/cluster/habitat/default.nix2
-rw-r--r--pkgs/applications/networking/cluster/helm/default.nix2
-rw-r--r--pkgs/applications/networking/cluster/k9s/default.nix2
-rw-r--r--pkgs/applications/networking/cluster/kops/default.nix2
-rw-r--r--pkgs/applications/networking/cluster/kubeless/default.nix2
-rw-r--r--pkgs/applications/networking/cluster/kubelogin/default.nix2
-rw-r--r--pkgs/applications/networking/cluster/kubernix/default.nix2
-rw-r--r--pkgs/applications/networking/cluster/kubeval/default.nix2
-rw-r--r--pkgs/applications/networking/cluster/linkerd/default.nix2
-rw-r--r--pkgs/applications/networking/cluster/openshift/default.nix2
-rw-r--r--pkgs/applications/networking/cluster/popeye/default.nix2
-rw-r--r--pkgs/applications/networking/cluster/ssm-agent/default.nix2
-rw-r--r--pkgs/applications/networking/cluster/terraform-inventory/default.nix2
-rw-r--r--pkgs/applications/networking/cluster/terraform-providers/ansible/default.nix2
-rw-r--r--pkgs/applications/networking/cluster/terraform-providers/cloudfoundry/default.nix2
-rw-r--r--pkgs/applications/networking/cluster/terraform-providers/elasticsearch/default.nix2
-rw-r--r--pkgs/applications/networking/cluster/terraform-providers/gandi/default.nix2
-rw-r--r--pkgs/applications/networking/cluster/terraform-providers/hcloud/default.nix2
-rw-r--r--pkgs/applications/networking/cluster/terraform-providers/keycloak/default.nix2
-rw-r--r--pkgs/applications/networking/cluster/terraform-providers/libvirt/default.nix2
-rw-r--r--pkgs/applications/networking/cluster/terraform-providers/linuxbox/default.nix2
-rw-r--r--pkgs/applications/networking/cluster/terraform-providers/lxd/default.nix2
-rw-r--r--pkgs/applications/networking/cluster/terraform-providers/shell/default.nix2
-rw-r--r--pkgs/applications/networking/cluster/terraform-providers/vercel/default.nix2
-rw-r--r--pkgs/applications/networking/cluster/terraform-providers/vpsadmin/default.nix2
-rw-r--r--pkgs/applications/networking/cluster/tilt/default.nix2
-rw-r--r--pkgs/applications/networking/cluster/velero/default.nix2
-rw-r--r--pkgs/applications/networking/datovka/default.nix2
-rw-r--r--pkgs/applications/networking/dyndns/cfdyndns/default.nix2
-rw-r--r--pkgs/applications/networking/feedreaders/canto-curses/default.nix2
-rw-r--r--pkgs/applications/networking/feedreaders/canto-daemon/default.nix2
-rw-r--r--pkgs/applications/networking/feedreaders/feeds/default.nix2
-rw-r--r--pkgs/applications/networking/feedreaders/rawdog/default.nix2
-rw-r--r--pkgs/applications/networking/flent/default.nix2
-rw-r--r--pkgs/applications/networking/gdrive/default.nix2
-rw-r--r--pkgs/applications/networking/gns3/server.nix2
-rw-r--r--pkgs/applications/networking/instant-messengers/blink/default.nix2
-rw-r--r--pkgs/applications/networking/instant-messengers/cordless/default.nix2
-rw-r--r--pkgs/applications/networking/instant-messengers/coyim/default.nix2
-rw-r--r--pkgs/applications/networking/instant-messengers/element/element-desktop.nix2
-rw-r--r--pkgs/applications/networking/instant-messengers/ferdi/default.nix2
-rw-r--r--pkgs/applications/networking/instant-messengers/franz/default.nix2
-rw-r--r--pkgs/applications/networking/instant-messengers/linphone/default.nix2
-rw-r--r--pkgs/applications/networking/instant-messengers/matrixcli/default.nix2
-rw-r--r--pkgs/applications/networking/instant-messengers/mm/default.nix2
-rw-r--r--pkgs/applications/networking/instant-messengers/neochat/default.nix2
-rw-r--r--pkgs/applications/networking/instant-messengers/pybitmessage/default.nix2
-rw-r--r--pkgs/applications/networking/instant-messengers/rambox/rambox.nix2
-rw-r--r--pkgs/applications/networking/instant-messengers/ricochet/default.nix2
-rw-r--r--pkgs/applications/networking/instant-messengers/scudcloud/default.nix2
-rw-r--r--pkgs/applications/networking/instant-messengers/slack-term/default.nix2
-rw-r--r--pkgs/applications/networking/instant-messengers/swift-im/default.nix2
-rw-r--r--pkgs/applications/networking/instant-messengers/tensor/default.nix2
-rw-r--r--pkgs/applications/networking/instant-messengers/turses/default.nix2
-rw-r--r--pkgs/applications/networking/instant-messengers/twinkle/default.nix2
-rw-r--r--pkgs/applications/networking/instant-messengers/xmpp-client/default.nix2
-rw-r--r--pkgs/applications/networking/ipfs-cluster/default.nix2
-rw-r--r--pkgs/applications/networking/ipfs/default.nix2
-rw-r--r--pkgs/applications/networking/ipget/default.nix2
-rw-r--r--pkgs/applications/networking/irc/qweechat/default.nix2
-rw-r--r--pkgs/applications/networking/irc/weechat/scripts/weechat-matrix/default.nix2
-rw-r--r--pkgs/applications/networking/lieer/default.nix2
-rw-r--r--pkgs/applications/networking/maestral-qt/default.nix3
-rw-r--r--pkgs/applications/networking/mailreaders/aerc/default.nix2
-rw-r--r--pkgs/applications/networking/mailreaders/afew/default.nix2
-rw-r--r--pkgs/applications/networking/mailreaders/mailpile/default.nix2
-rw-r--r--pkgs/applications/networking/mailreaders/meli/default.nix3
-rw-r--r--pkgs/applications/networking/mailreaders/mlarchive2maildir/default.nix2
-rw-r--r--pkgs/applications/networking/owncloud-client/default.nix2
-rw-r--r--pkgs/applications/networking/p2p/deluge/default.nix2
-rw-r--r--pkgs/applications/networking/p2p/zeronet/default.nix2
-rw-r--r--pkgs/applications/networking/protocol/default.nix2
-rw-r--r--pkgs/applications/networking/pyload/default.nix2
-rw-r--r--pkgs/applications/networking/qv2ray/default.nix2
-rw-r--r--pkgs/applications/networking/remote/x2goclient/default.nix2
-rw-r--r--pkgs/applications/networking/shellhub-agent/default.nix2
-rw-r--r--pkgs/applications/networking/soulseek/nicotine-plus/default.nix2
-rw-r--r--pkgs/applications/networking/sync/acd_cli/default.nix2
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2779 files changed, 2844 insertions, 2834 deletions
diff --git a/pkgs/applications/accessibility/contrast/default.nix b/pkgs/applications/accessibility/contrast/default.nix
index 2899d4ea6ef..689ad273575 100644
--- a/pkgs/applications/accessibility/contrast/default.nix
+++ b/pkgs/applications/accessibility/contrast/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , fetchFromGitLab
 , cairo
 , dbus
diff --git a/pkgs/applications/audio/cadence/default.nix b/pkgs/applications/audio/cadence/default.nix
index d71420d0722..2d3ac0c314e 100644
--- a/pkgs/applications/audio/cadence/default.nix
+++ b/pkgs/applications/audio/cadence/default.nix
@@ -1,7 +1,6 @@
-{ stdenv
+{ lib
 , a2jmidid
 , coreutils
-, lib
 , libjack2
 , fetchpatch
 , fetchzip
diff --git a/pkgs/applications/audio/clementine/default.nix b/pkgs/applications/audio/clementine/default.nix
index 12aec0d4cbb..be0f2f72529 100644
--- a/pkgs/applications/audio/clementine/default.nix
+++ b/pkgs/applications/audio/clementine/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, mkDerivation, fetchFromGitHub, fetchpatch, boost, cmake, chromaprint, gettext, gst_all_1, liblastfm
+{ lib, mkDerivation, fetchFromGitHub, fetchpatch, boost, cmake, chromaprint, gettext, gst_all_1, liblastfm
 , qtbase, qtx11extras
 , taglib, fftw, glew, qjson, sqlite, libgpod, libplist, usbmuxd, libmtp
 , libpulseaudio, gvfs, libcdio, libechonest, libspotify, pcre, projectm, protobuf
diff --git a/pkgs/applications/audio/cozy-audiobooks/default.nix b/pkgs/applications/audio/cozy-audiobooks/default.nix
index e78e50877d3..bcad36e2da9 100644
--- a/pkgs/applications/audio/cozy-audiobooks/default.nix
+++ b/pkgs/applications/audio/cozy-audiobooks/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub
+{ lib, fetchFromGitHub
 , ninja
 , meson
 , pkg-config
diff --git a/pkgs/applications/audio/curseradio/default.nix b/pkgs/applications/audio/curseradio/default.nix
index 82f3b130e6e..94059e06e54 100644
--- a/pkgs/applications/audio/curseradio/default.nix
+++ b/pkgs/applications/audio/curseradio/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, substituteAll, python3Packages, mpv }:
+{ lib, fetchFromGitHub, substituteAll, python3Packages, mpv }:
 
 python3Packages.buildPythonApplication rec {
   version = "0.2";
diff --git a/pkgs/applications/audio/dfasma/default.nix b/pkgs/applications/audio/dfasma/default.nix
index 20a1044fe24..3d4e5e5e5b9 100644
--- a/pkgs/applications/audio/dfasma/default.nix
+++ b/pkgs/applications/audio/dfasma/default.nix
@@ -1,4 +1,4 @@
-{ mkDerivation, lib, stdenv, fetchFromGitHub, fftw, libsndfile, qtbase, qtmultimedia, qmake }:
+{ mkDerivation, lib, fetchFromGitHub, fftw, libsndfile, qtbase, qtmultimedia, qmake }:
 
 let
 
diff --git a/pkgs/applications/audio/dr14_tmeter/default.nix b/pkgs/applications/audio/dr14_tmeter/default.nix
index 92e6eb2b323..80b2cff3ce0 100644
--- a/pkgs/applications/audio/dr14_tmeter/default.nix
+++ b/pkgs/applications/audio/dr14_tmeter/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, python3Packages, pkgs }:
+{ lib, fetchFromGitHub, python3Packages, pkgs }:
 
 python3Packages.buildPythonApplication rec {
   pname = "dr14_tmeter";
diff --git a/pkgs/applications/audio/faust/faust2jackrust.nix b/pkgs/applications/audio/faust/faust2jackrust.nix
index 77335da2ce7..a93251c8d2d 100644
--- a/pkgs/applications/audio/faust/faust2jackrust.nix
+++ b/pkgs/applications/audio/faust/faust2jackrust.nix
@@ -1,5 +1,4 @@
-{ stdenv
-, faust
+{ faust
 , libjack2
 , cargo
 , binutils
diff --git a/pkgs/applications/audio/fmit/default.nix b/pkgs/applications/audio/fmit/default.nix
index e22067c38fc..b91c72a5c75 100644
--- a/pkgs/applications/audio/fmit/default.nix
+++ b/pkgs/applications/audio/fmit/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, mkDerivation, fetchFromGitHub, fftw, qtbase, qtmultimedia, qmake, itstool, wrapQtAppsHook
+{ lib, mkDerivation, fetchFromGitHub, fftw, qtbase, qtmultimedia, qmake, itstool, wrapQtAppsHook
 , alsaSupport ? true, alsaLib ? null
 , jackSupport ? false, libjack2 ? null
 , portaudioSupport ? false, portaudio ? null }:
diff --git a/pkgs/applications/audio/gnome-podcasts/default.nix b/pkgs/applications/audio/gnome-podcasts/default.nix
index ed51304b225..1733aef4177 100644
--- a/pkgs/applications/audio/gnome-podcasts/default.nix
+++ b/pkgs/applications/audio/gnome-podcasts/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , rustPlatform
 , fetchFromGitLab
 , fetchpatch
diff --git a/pkgs/applications/audio/gpodder/default.nix b/pkgs/applications/audio/gpodder/default.nix
index dea1f5fe7bc..229050654cd 100644
--- a/pkgs/applications/audio/gpodder/default.nix
+++ b/pkgs/applications/audio/gpodder/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, python3, python3Packages, intltool
+{ lib, fetchFromGitHub, python3, python3Packages, intltool
 , glibcLocales, gnome3, gtk3, wrapGAppsHook
 , gobject-introspection
 }:
diff --git a/pkgs/applications/audio/greg/default.nix b/pkgs/applications/audio/greg/default.nix
index 46e1baed07d..95f3bf9988c 100644
--- a/pkgs/applications/audio/greg/default.nix
+++ b/pkgs/applications/audio/greg/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, pythonPackages }:
+{ lib, fetchFromGitHub, pythonPackages }:
 
 with pythonPackages; buildPythonApplication rec {
   pname = "greg";
diff --git a/pkgs/applications/audio/gtklick/default.nix b/pkgs/applications/audio/gtklick/default.nix
index ddd09ce4452..b3b95ca057e 100644
--- a/pkgs/applications/audio/gtklick/default.nix
+++ b/pkgs/applications/audio/gtklick/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, pythonPackages, gettext, klick}:
+{ lib, fetchurl, pythonPackages, gettext, klick}:
 
 pythonPackages.buildPythonApplication rec {
   pname = "gtklick";
diff --git a/pkgs/applications/audio/jamulus/default.nix b/pkgs/applications/audio/jamulus/default.nix
index c6510f5469c..13b488ce7d7 100644
--- a/pkgs/applications/audio/jamulus/default.nix
+++ b/pkgs/applications/audio/jamulus/default.nix
@@ -1,4 +1,4 @@
-{ mkDerivation, lib, stdenv, fetchFromGitHub, fetchpatch, pkg-config, qtscript, qmake, libjack2
+{ mkDerivation, lib, fetchFromGitHub, fetchpatch, pkg-config, qtscript, qmake, libjack2
 }:
 
 mkDerivation rec {
diff --git a/pkgs/applications/audio/librespot/default.nix b/pkgs/applications/audio/librespot/default.nix
index 7ba47be686e..13aa4fe5bc2 100644
--- a/pkgs/applications/audio/librespot/default.nix
+++ b/pkgs/applications/audio/librespot/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, rustPlatform, pkg-config, openssl, withRodio ? true
+{ lib, fetchFromGitHub, rustPlatform, pkg-config, openssl, withRodio ? true
 , withALSA ? true, alsaLib ? null, withPulseAudio ? false, libpulseaudio ? null
 , withPortAudio ? false, portaudio ? null }:
 
diff --git a/pkgs/applications/audio/lmms/default.nix b/pkgs/applications/audio/lmms/default.nix
index 4d52a286aba..11a7d0cf3c6 100644
--- a/pkgs/applications/audio/lmms/default.nix
+++ b/pkgs/applications/audio/lmms/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, cmake, pkg-config, alsaLib ? null, fftwFloat, fltk13
+{ lib, fetchFromGitHub, cmake, pkg-config, alsaLib ? null, fftwFloat, fltk13
 , fluidsynth_1 ? null, lame ? null, libgig ? null, libjack2 ? null, libpulseaudio ? null
 , libsamplerate, libsoundio ? null, libsndfile, libvorbis ? null, portaudio ? null
 , qtbase, qtx11extras, qttools, SDL ? null, mkDerivation }:
diff --git a/pkgs/applications/audio/mimms/default.nix b/pkgs/applications/audio/mimms/default.nix
index 793ee3d263a..9811998c368 100644
--- a/pkgs/applications/audio/mimms/default.nix
+++ b/pkgs/applications/audio/mimms/default.nix
@@ -1,4 +1,4 @@
-{ fetchurl, lib, stdenv, pythonPackages, libmms }:
+{ fetchurl, lib, pythonPackages, libmms }:
 
 pythonPackages.buildPythonApplication rec {
   pname = "mimms";
diff --git a/pkgs/applications/audio/mixxx/default.nix b/pkgs/applications/audio/mixxx/default.nix
index 70e6616482f..7af4b585adf 100644
--- a/pkgs/applications/audio/mixxx/default.nix
+++ b/pkgs/applications/audio/mixxx/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, mkDerivation, fetchurl, fetchFromGitHub, chromaprint
+{ lib, mkDerivation, fetchurl, fetchFromGitHub, chromaprint
 , fftw, flac, faad2, glibcLocales, mp4v2
 , libid3tag, libmad, libopus, libshout, libsndfile, libusb1, libvorbis
 , libGLU, libxcb, lilv, lv2, opusfile
diff --git a/pkgs/applications/audio/mopidy/gmusic.nix b/pkgs/applications/audio/mopidy/gmusic.nix
index 54af3bc68f1..6e76d6af87d 100644
--- a/pkgs/applications/audio/mopidy/gmusic.nix
+++ b/pkgs/applications/audio/mopidy/gmusic.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python3Packages, mopidy }:
+{ lib, python3Packages, mopidy }:
 
 python3Packages.buildPythonApplication rec {
   pname = "mopidy-gmusic";
diff --git a/pkgs/applications/audio/mopidy/iris.nix b/pkgs/applications/audio/mopidy/iris.nix
index 05827b0bb56..c2171d4cecc 100644
--- a/pkgs/applications/audio/mopidy/iris.nix
+++ b/pkgs/applications/audio/mopidy/iris.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python3Packages, mopidy }:
+{ lib, python3Packages, mopidy }:
 
 python3Packages.buildPythonApplication rec {
   pname = "Mopidy-Iris";
diff --git a/pkgs/applications/audio/mopidy/moped.nix b/pkgs/applications/audio/mopidy/moped.nix
index 8daaef7d45d..c191eba4c4d 100644
--- a/pkgs/applications/audio/mopidy/moped.nix
+++ b/pkgs/applications/audio/mopidy/moped.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, pythonPackages, mopidy, glibcLocales }:
+{ lib, pythonPackages, mopidy, glibcLocales }:
 
 pythonPackages.buildPythonApplication rec {
   pname = "Mopidy-Moped";
diff --git a/pkgs/applications/audio/mopidy/mopify.nix b/pkgs/applications/audio/mopidy/mopify.nix
index 17e68c16539..670b1a9c509 100644
--- a/pkgs/applications/audio/mopidy/mopify.nix
+++ b/pkgs/applications/audio/mopidy/mopify.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, pythonPackages, mopidy }:
+{ lib, pythonPackages, mopidy }:
 
 pythonPackages.buildPythonApplication rec {
   pname = "Mopidy-Mopify";
diff --git a/pkgs/applications/audio/mopidy/mpd.nix b/pkgs/applications/audio/mopidy/mpd.nix
index 8d6d7a1528b..d686d492898 100644
--- a/pkgs/applications/audio/mopidy/mpd.nix
+++ b/pkgs/applications/audio/mopidy/mpd.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python3Packages, mopidy }:
+{ lib, python3Packages, mopidy }:
 
 python3Packages.buildPythonApplication rec {
   pname = "Mopidy-MPD";
diff --git a/pkgs/applications/audio/mopidy/mpris.nix b/pkgs/applications/audio/mopidy/mpris.nix
index 868dbaf3035..6327ba020bf 100644
--- a/pkgs/applications/audio/mopidy/mpris.nix
+++ b/pkgs/applications/audio/mopidy/mpris.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python3Packages, mopidy }:
+{ lib, python3Packages, mopidy }:
 
 python3Packages.buildPythonApplication rec {
   pname = "mopidy-mpris";
diff --git a/pkgs/applications/audio/mopidy/scrobbler.nix b/pkgs/applications/audio/mopidy/scrobbler.nix
index be38c6a7040..621ced53646 100644
--- a/pkgs/applications/audio/mopidy/scrobbler.nix
+++ b/pkgs/applications/audio/mopidy/scrobbler.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python3Packages, mopidy }:
+{ lib, python3Packages, mopidy }:
 
 python3Packages.buildPythonApplication rec {
   pname = "Mopidy-Scrobbler";
diff --git a/pkgs/applications/audio/mopidy/somafm.nix b/pkgs/applications/audio/mopidy/somafm.nix
index afa46726db7..0637731dcb5 100644
--- a/pkgs/applications/audio/mopidy/somafm.nix
+++ b/pkgs/applications/audio/mopidy/somafm.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python3Packages, mopidy }:
+{ lib, python3Packages, mopidy }:
 
 python3Packages.buildPythonApplication rec {
   pname = "mopidy-somafm";
diff --git a/pkgs/applications/audio/mopidy/soundcloud.nix b/pkgs/applications/audio/mopidy/soundcloud.nix
index bdc3523652c..d8a244b5146 100644
--- a/pkgs/applications/audio/mopidy/soundcloud.nix
+++ b/pkgs/applications/audio/mopidy/soundcloud.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, pythonPackages, mopidy }:
+{ lib, fetchFromGitHub, pythonPackages, mopidy }:
 
 pythonPackages.buildPythonApplication rec {
   pname = "mopidy-soundcloud";
diff --git a/pkgs/applications/audio/mopidy/spotify-tunigo.nix b/pkgs/applications/audio/mopidy/spotify-tunigo.nix
index 8fafab0970f..70d076190cd 100644
--- a/pkgs/applications/audio/mopidy/spotify-tunigo.nix
+++ b/pkgs/applications/audio/mopidy/spotify-tunigo.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, pythonPackages, mopidy, mopidy-spotify }:
+{ lib, fetchFromGitHub, pythonPackages, mopidy, mopidy-spotify }:
 
 pythonPackages.buildPythonApplication rec {
   pname = "mopidy-spotify-tunigo";
diff --git a/pkgs/applications/audio/mopidy/spotify.nix b/pkgs/applications/audio/mopidy/spotify.nix
index 57ba6ea1f61..e44b9f35daa 100644
--- a/pkgs/applications/audio/mopidy/spotify.nix
+++ b/pkgs/applications/audio/mopidy/spotify.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, pythonPackages, mopidy }:
+{ lib, fetchurl, pythonPackages, mopidy }:
 
 pythonPackages.buildPythonApplication rec {
   pname = "mopidy-spotify";
diff --git a/pkgs/applications/audio/mopidy/tunein.nix b/pkgs/applications/audio/mopidy/tunein.nix
index d8a6d6eacca..4a3edd2a434 100644
--- a/pkgs/applications/audio/mopidy/tunein.nix
+++ b/pkgs/applications/audio/mopidy/tunein.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python3Packages, mopidy }:
+{ lib, python3Packages, mopidy }:
 
 python3Packages.buildPythonApplication rec {
   pname = "mopidy-tunein";
diff --git a/pkgs/applications/audio/mopidy/youtube.nix b/pkgs/applications/audio/mopidy/youtube.nix
index 35a85b95801..b84a756c2ce 100644
--- a/pkgs/applications/audio/mopidy/youtube.nix
+++ b/pkgs/applications/audio/mopidy/youtube.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python3Packages, mopidy }:
+{ lib, python3Packages, mopidy }:
 
 python3Packages.buildPythonApplication rec {
   pname = "mopidy-youtube";
diff --git a/pkgs/applications/audio/munt/default.nix b/pkgs/applications/audio/munt/default.nix
index 6d010c6cd95..0efe034034a 100644
--- a/pkgs/applications/audio/munt/default.nix
+++ b/pkgs/applications/audio/munt/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, mkDerivation, fetchFromGitHub, cmake, qtbase, alsaLib, makeDesktopItem, libjack2 }:
+{ lib, mkDerivation, fetchFromGitHub, cmake, qtbase, alsaLib, makeDesktopItem, libjack2 }:
 
 let
   desktopItem = makeDesktopItem rec {
diff --git a/pkgs/applications/audio/musescore/default.nix b/pkgs/applications/audio/musescore/default.nix
index ff39e62e729..47f8e5a22e6 100644
--- a/pkgs/applications/audio/musescore/default.nix
+++ b/pkgs/applications/audio/musescore/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, mkDerivation, lib, fetchFromGitHub, cmake, pkg-config
+{ mkDerivation, lib, fetchFromGitHub, cmake, pkg-config
 , alsaLib, freetype, libjack2, lame, libogg, libpulseaudio, libsndfile, libvorbis
 , portaudio, portmidi, qtbase, qtdeclarative, qtgraphicaleffects
 , qtquickcontrols2, qtscript, qtsvg, qttools
diff --git a/pkgs/applications/audio/noisetorch/default.nix b/pkgs/applications/audio/noisetorch/default.nix
index bb22b3cec22..fea6e097de7 100644
--- a/pkgs/applications/audio/noisetorch/default.nix
+++ b/pkgs/applications/audio/noisetorch/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub, rnnoise-plugin }:
+{ lib, buildGoModule, fetchFromGitHub, rnnoise-plugin }:
 
 buildGoModule rec {
   pname = "NoiseTorch";
diff --git a/pkgs/applications/audio/padthv1/default.nix b/pkgs/applications/audio/padthv1/default.nix
index 1d84aed8b2e..f238a687609 100644
--- a/pkgs/applications/audio/padthv1/default.nix
+++ b/pkgs/applications/audio/padthv1/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, pkg-config, libjack2, alsaLib, libsndfile, liblo, lv2, qt5, fftwFloat, mkDerivation }:
+{ lib, fetchurl, pkg-config, libjack2, alsaLib, libsndfile, liblo, lv2, qt5, fftwFloat, mkDerivation }:
 
 mkDerivation rec {
   pname = "padthv1";
diff --git a/pkgs/applications/audio/picard/default.nix b/pkgs/applications/audio/picard/default.nix
index 733cb702c7e..200e457c568 100644
--- a/pkgs/applications/audio/picard/default.nix
+++ b/pkgs/applications/audio/picard/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python3Packages, fetchFromGitHub, gettext, chromaprint, qt5
+{ lib, python3Packages, fetchFromGitHub, gettext, chromaprint, qt5
 , enablePlayback ? true
 , gst_all_1
 }:
diff --git a/pkgs/applications/audio/pithos/default.nix b/pkgs/applications/audio/pithos/default.nix
index c64371f091c..939b53c44fb 100644
--- a/pkgs/applications/audio/pithos/default.nix
+++ b/pkgs/applications/audio/pithos/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, meson, ninja, pkg-config, appstream-glib
+{ lib, fetchFromGitHub, meson, ninja, pkg-config, appstream-glib
 , wrapGAppsHook, pythonPackages, gtk3, gnome3, gobject-introspection
 , libnotify, libsecret, gst_all_1 }:
 
diff --git a/pkgs/applications/audio/polyphone/default.nix b/pkgs/applications/audio/polyphone/default.nix
index 05800c360fa..a331952aa81 100644
--- a/pkgs/applications/audio/polyphone/default.nix
+++ b/pkgs/applications/audio/polyphone/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, mkDerivation, fetchFromGitHub, qmake, pkg-config, alsaLib, libjack2, portaudio, libogg, flac, libvorbis, rtmidi, qtsvg }:
+{ lib, mkDerivation, fetchFromGitHub, qmake, pkg-config, alsaLib, libjack2, portaudio, libogg, flac, libvorbis, rtmidi, qtsvg }:
 
 mkDerivation rec {
   version = "2.2.0";
diff --git a/pkgs/applications/audio/puddletag/default.nix b/pkgs/applications/audio/puddletag/default.nix
index 94a571df294..efa1d943610 100644
--- a/pkgs/applications/audio/puddletag/default.nix
+++ b/pkgs/applications/audio/puddletag/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, python3Packages, wrapQtAppsHook, chromaprint }:
+{ lib, fetchFromGitHub, python3Packages, wrapQtAppsHook, chromaprint }:
 
 python3Packages.buildPythonApplication rec {
   pname = "puddletag";
diff --git a/pkgs/applications/audio/pulseaudio-dlna/default.nix b/pkgs/applications/audio/pulseaudio-dlna/default.nix
index a19a03d4bd2..83de192c6b3 100644
--- a/pkgs/applications/audio/pulseaudio-dlna/default.nix
+++ b/pkgs/applications/audio/pulseaudio-dlna/default.nix
@@ -1,4 +1,4 @@
-{ fetchFromGitHub, lib, stdenv, pythonPackages
+{ fetchFromGitHub, lib, pythonPackages
 , mp3Support ? true, lame ? null
 , opusSupport ? true, opusTools ? null
 , faacSupport ? false, faac ? null
diff --git a/pkgs/applications/audio/pulseaudio-dlna/zeroconf.nix b/pkgs/applications/audio/pulseaudio-dlna/zeroconf.nix
index 0e3eeac984a..d4f3306697d 100644
--- a/pkgs/applications/audio/pulseaudio-dlna/zeroconf.nix
+++ b/pkgs/applications/audio/pulseaudio-dlna/zeroconf.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , ifaddr
diff --git a/pkgs/applications/audio/qjackctl/default.nix b/pkgs/applications/audio/qjackctl/default.nix
index 719ddd28e2a..586dfeae733 100644
--- a/pkgs/applications/audio/qjackctl/default.nix
+++ b/pkgs/applications/audio/qjackctl/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, mkDerivation, fetchFromGitHub
+{ lib, mkDerivation, fetchFromGitHub
 , pkg-config, cmake, alsaLib, libjack2, dbus, qtbase, qttools, qtx11extras
 # Enable jack session support
 , jackSession ? false
diff --git a/pkgs/applications/audio/qmmp/default.nix b/pkgs/applications/audio/qmmp/default.nix
index 950e16cedc8..f079b99af77 100644
--- a/pkgs/applications/audio/qmmp/default.nix
+++ b/pkgs/applications/audio/qmmp/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, mkDerivation, fetchurl, cmake, pkg-config, xlibsWrapper
+{ lib, mkDerivation, fetchurl, cmake, pkg-config, xlibsWrapper
 , qtbase, qttools, qtmultimedia, qtx11extras
 # transports
 , curl, libmms
diff --git a/pkgs/applications/audio/qsampler/default.nix b/pkgs/applications/audio/qsampler/default.nix
index 03f519d3816..bb40e0b3eeb 100644
--- a/pkgs/applications/audio/qsampler/default.nix
+++ b/pkgs/applications/audio/qsampler/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, autoconf, automake, libtool, pkg-config, qttools
+{ lib, fetchurl, autoconf, automake, libtool, pkg-config, qttools
 , liblscp, libgig, qtbase, mkDerivation }:
 
 mkDerivation rec {
diff --git a/pkgs/applications/audio/qsynth/default.nix b/pkgs/applications/audio/qsynth/default.nix
index 4b712bf1d25..f708207cce9 100644
--- a/pkgs/applications/audio/qsynth/default.nix
+++ b/pkgs/applications/audio/qsynth/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, alsaLib, fluidsynth, libjack2, autoconf, pkg-config
+{ lib, fetchurl, alsaLib, fluidsynth, libjack2, autoconf, pkg-config
 , mkDerivation, qtbase, qttools, qtx11extras
 }:
 
diff --git a/pkgs/applications/audio/qtractor/default.nix b/pkgs/applications/audio/qtractor/default.nix
index 493a99f6b71..f19d0f70fdf 100644
--- a/pkgs/applications/audio/qtractor/default.nix
+++ b/pkgs/applications/audio/qtractor/default.nix
@@ -24,7 +24,7 @@
 , serd
 , sord
 , sratom
-, lib, stdenv
+, lib
 , suil
 }:
 
diff --git a/pkgs/applications/audio/shortwave/default.nix b/pkgs/applications/audio/shortwave/default.nix
index 2cc8c53f607..a503d3b344c 100644
--- a/pkgs/applications/audio/shortwave/default.nix
+++ b/pkgs/applications/audio/shortwave/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , fetchFromGitLab
 , cargo
 , dbus
diff --git a/pkgs/applications/audio/sonata/default.nix b/pkgs/applications/audio/sonata/default.nix
index bc098cedaf4..83af7985dbe 100644
--- a/pkgs/applications/audio/sonata/default.nix
+++ b/pkgs/applications/audio/sonata/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, wrapGAppsHook, gettext
+{ lib, fetchFromGitHub, wrapGAppsHook, gettext
 , python3Packages, gnome3, gtk3, glib, gdk-pixbuf, gsettings-desktop-schemas, gobject-introspection }:
 
 let
diff --git a/pkgs/applications/audio/spotify-cli-linux/default.nix b/pkgs/applications/audio/spotify-cli-linux/default.nix
index 593ad9468eb..e473d97ce56 100644
--- a/pkgs/applications/audio/spotify-cli-linux/default.nix
+++ b/pkgs/applications/audio/spotify-cli-linux/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python3Packages, dbus }:
+{ lib, python3Packages, dbus }:
 python3Packages.buildPythonApplication rec {
   pname = "spotify-cli-linux";
   version = "1.6.0";
diff --git a/pkgs/applications/audio/synthv1/default.nix b/pkgs/applications/audio/synthv1/default.nix
index 8097ee90930..50e16c355e2 100644
--- a/pkgs/applications/audio/synthv1/default.nix
+++ b/pkgs/applications/audio/synthv1/default.nix
@@ -1,4 +1,4 @@
-{ mkDerivation, lib, stdenv, fetchurl, pkg-config, qtbase, qttools, libjack2, alsaLib, liblo, lv2 }:
+{ mkDerivation, lib, fetchurl, pkg-config, qtbase, qttools, libjack2, alsaLib, liblo, lv2 }:
 
 mkDerivation rec {
   pname = "synthv1";
diff --git a/pkgs/applications/audio/traverso/default.nix b/pkgs/applications/audio/traverso/default.nix
index 1cb9795005c..71a91dc3105 100644
--- a/pkgs/applications/audio/traverso/default.nix
+++ b/pkgs/applications/audio/traverso/default.nix
@@ -1,4 +1,4 @@
-{ mkDerivation, lib, stdenv, fetchurl, cmake, pkg-config
+{ mkDerivation, lib, fetchurl, cmake, pkg-config
 , alsaLib, fftw, flac, lame, libjack2, libmad, libpulseaudio
 , libsamplerate, libsndfile, libvorbis, portaudio, qtbase, wavpack
 }:
diff --git a/pkgs/applications/audio/whipper/default.nix b/pkgs/applications/audio/whipper/default.nix
index 8a46a06efce..97d42eb9c69 100644
--- a/pkgs/applications/audio/whipper/default.nix
+++ b/pkgs/applications/audio/whipper/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, python3, cdparanoia, cdrdao, flac
+{ lib, fetchFromGitHub, python3, cdparanoia, cdrdao, flac
 , sox, accuraterip-checksum, libsndfile, util-linux, substituteAll }:
 
 python3.pkgs.buildPythonApplication rec {
diff --git a/pkgs/applications/blockchains/ethabi.nix b/pkgs/applications/blockchains/ethabi.nix
index ec142cc723e..8cf3295ccab 100644
--- a/pkgs/applications/blockchains/ethabi.nix
+++ b/pkgs/applications/blockchains/ethabi.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, rustPlatform }:
+{ lib, fetchFromGitHub, rustPlatform }:
 
 rustPlatform.buildRustPackage rec {
   pname = "ethabi";
diff --git a/pkgs/applications/blockchains/ledger-live-desktop/default.nix b/pkgs/applications/blockchains/ledger-live-desktop/default.nix
index 54805f2512f..21e5a124f7d 100644
--- a/pkgs/applications/blockchains/ledger-live-desktop/default.nix
+++ b/pkgs/applications/blockchains/ledger-live-desktop/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, makeDesktopItem, appimageTools, imagemagick }:
+{ lib, fetchurl, makeDesktopItem, appimageTools, imagemagick }:
 
 let
   pname = "ledger-live-desktop";
diff --git a/pkgs/applications/blockchains/quorum.nix b/pkgs/applications/blockchains/quorum.nix
index 499e2a77c6f..1424ddc9516 100644
--- a/pkgs/applications/blockchains/quorum.nix
+++ b/pkgs/applications/blockchains/quorum.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, buildGoPackage, git, which, removeReferencesTo, go }:
+{ lib, fetchFromGitHub, buildGoPackage, git, which, removeReferencesTo, go }:
 
 buildGoPackage rec {
   pname = "quorum";
diff --git a/pkgs/applications/blockchains/turbo-geth.nix b/pkgs/applications/blockchains/turbo-geth.nix
index 79a1eda3495..dcfba417149 100644
--- a/pkgs/applications/blockchains/turbo-geth.nix
+++ b/pkgs/applications/blockchains/turbo-geth.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "turbo-geth";
diff --git a/pkgs/applications/editors/emacs-modes/sv-kalender/default.nix b/pkgs/applications/editors/emacs-modes/sv-kalender/default.nix
index dd553fc1998..ea871ccf414 100644
--- a/pkgs/applications/editors/emacs-modes/sv-kalender/default.nix
+++ b/pkgs/applications/editors/emacs-modes/sv-kalender/default.nix
@@ -1,4 +1,4 @@
-{ fetchurl, lib, stdenv, trivialBuild }:
+{ fetchurl, lib, trivialBuild }:
 
 trivialBuild {
   pname = "sv-kalender";
diff --git a/pkgs/applications/editors/featherpad/default.nix b/pkgs/applications/editors/featherpad/default.nix
index 059d49151d8..c73238ce366 100644
--- a/pkgs/applications/editors/featherpad/default.nix
+++ b/pkgs/applications/editors/featherpad/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, mkDerivation, pkg-config, qmake, qttools, qtbase, qtsvg, qtx11extras, fetchFromGitHub }:
+{ lib, mkDerivation, pkg-config, qmake, qttools, qtbase, qtsvg, qtx11extras, fetchFromGitHub }:
 mkDerivation rec {
   pname = "featherpad";
   version = "0.10.0";
diff --git a/pkgs/applications/editors/focuswriter/default.nix b/pkgs/applications/editors/focuswriter/default.nix
index 31a7026106e..d47c315f613 100644
--- a/pkgs/applications/editors/focuswriter/default.nix
+++ b/pkgs/applications/editors/focuswriter/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, pkg-config, qmake, qttools, hunspell, qtbase, qtmultimedia, mkDerivation }:
+{ lib, fetchurl, pkg-config, qmake, qttools, hunspell, qtbase, qtmultimedia, mkDerivation }:
 
 mkDerivation rec {
   pname = "focuswriter";
diff --git a/pkgs/applications/editors/hecate/default.nix b/pkgs/applications/editors/hecate/default.nix
index a0fdcfbb3f6..5429497d209 100644
--- a/pkgs/applications/editors/hecate/default.nix
+++ b/pkgs/applications/editors/hecate/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   version = "0.0.1";
diff --git a/pkgs/applications/editors/hexdino/default.nix b/pkgs/applications/editors/hexdino/default.nix
index 5d782aa1abc..f92a4557ac7 100644
--- a/pkgs/applications/editors/hexdino/default.nix
+++ b/pkgs/applications/editors/hexdino/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, rustPlatform, ncurses }:
+{ lib, fetchFromGitHub, rustPlatform, ncurses }:
 
 rustPlatform.buildRustPackage {
   pname = "hexdino";
diff --git a/pkgs/applications/editors/kibi/default.nix b/pkgs/applications/editors/kibi/default.nix
index 07454d331c6..71833be3300 100644
--- a/pkgs/applications/editors/kibi/default.nix
+++ b/pkgs/applications/editors/kibi/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , fetchFromGitHub
 , rustPlatform
 }:
diff --git a/pkgs/applications/editors/manuskript/default.nix b/pkgs/applications/editors/manuskript/default.nix
index cc39da90c23..49dafe8fc1a 100644
--- a/pkgs/applications/editors/manuskript/default.nix
+++ b/pkgs/applications/editors/manuskript/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, zlib, fetchFromGitHub, python3Packages, wrapQtAppsHook }:
+{ lib, zlib, fetchFromGitHub, python3Packages, wrapQtAppsHook }:
 
 python3Packages.buildPythonApplication rec {
   pname = "manuskript";
diff --git a/pkgs/applications/editors/mindforger/default.nix b/pkgs/applications/editors/mindforger/default.nix
index a8e60cddfbb..512e0f12441 100644
--- a/pkgs/applications/editors/mindforger/default.nix
+++ b/pkgs/applications/editors/mindforger/default.nix
@@ -4,7 +4,7 @@
 , qmake
 , qtbase
 , qtwebkit
-, lib, stdenv
+, lib
 , wrapGAppsHook
 }:
 
diff --git a/pkgs/applications/editors/neovim/gnvim/default.nix b/pkgs/applications/editors/neovim/gnvim/default.nix
index f1d56584e49..208339c2e38 100644
--- a/pkgs/applications/editors/neovim/gnvim/default.nix
+++ b/pkgs/applications/editors/neovim/gnvim/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, rustPlatform, fetchFromGitHub, gtk, webkitgtk }:
+{ lib, rustPlatform, fetchFromGitHub, gtk, webkitgtk }:
 
 rustPlatform.buildRustPackage rec {
   pname = "gnvim-unwrapped";
diff --git a/pkgs/applications/editors/neovim/neovim-remote.nix b/pkgs/applications/editors/neovim/neovim-remote.nix
index 1d82e70f5c4..867e2275128 100644
--- a/pkgs/applications/editors/neovim/neovim-remote.nix
+++ b/pkgs/applications/editors/neovim/neovim-remote.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, pythonPackages }:
+{ lib, fetchFromGitHub, pythonPackages }:
 
 with lib;
 
diff --git a/pkgs/applications/editors/okteta/default.nix b/pkgs/applications/editors/okteta/default.nix
index d51f46b9e0a..b2011c5d8e6 100644
--- a/pkgs/applications/editors/okteta/default.nix
+++ b/pkgs/applications/editors/okteta/default.nix
@@ -1,4 +1,4 @@
-{ mkDerivation, lib, stdenv, fetchurl, extra-cmake-modules, kdoctools, qtscript, kconfig
+{ mkDerivation, lib, fetchurl, extra-cmake-modules, kdoctools, qtscript, kconfig
 , kinit, karchive, kcrash, kcmutils, kconfigwidgets, knewstuff, kparts
 , qca-qt5, shared-mime-info }:
 
diff --git a/pkgs/applications/editors/retext/default.nix b/pkgs/applications/editors/retext/default.nix
index 99f7340f753..6bf0f191ece 100644
--- a/pkgs/applications/editors/retext/default.nix
+++ b/pkgs/applications/editors/retext/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python3, fetchFromGitHub, wrapQtAppsHook, buildEnv, aspellDicts
+{ lib, python3, fetchFromGitHub, wrapQtAppsHook, buildEnv, aspellDicts
 # Use `lib.collect lib.isDerivation aspellDicts;` to make all dictionaries
 # available.
 , enchantAspellDicts ? with aspellDicts; [ en en-computers en-science ]
diff --git a/pkgs/applications/editors/sigil/default.nix b/pkgs/applications/editors/sigil/default.nix
index 1094c3c7553..b34441d100c 100644
--- a/pkgs/applications/editors/sigil/default.nix
+++ b/pkgs/applications/editors/sigil/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, mkDerivation, fetchFromGitHub, cmake, pkg-config, makeWrapper
+{ lib, mkDerivation, fetchFromGitHub, cmake, pkg-config, makeWrapper
 , boost, xercesc, hunspell, zlib, pcre16
 , qtbase, qttools, qtwebengine, qtxmlpatterns
 , python3Packages
diff --git a/pkgs/applications/editors/texmacs/common.nix b/pkgs/applications/editors/texmacs/common.nix
index 3ffcc8ecf45..e52d95f837d 100644
--- a/pkgs/applications/editors/texmacs/common.nix
+++ b/pkgs/applications/editors/texmacs/common.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, tex, extraFonts, chineseFonts, japaneseFonts, koreanFonts }:
+{ lib, fetchurl, tex, extraFonts, chineseFonts, japaneseFonts, koreanFonts }:
 rec {
   extraFontsSrc = fetchurl {
     url = "ftp://ftp.texmacs.org/pub/TeXmacs/fonts/TeXmacs-extra-fonts-1.0-noarch.tar.gz";
diff --git a/pkgs/applications/editors/thonny/default.nix b/pkgs/applications/editors/thonny/default.nix
index e98d57420e8..39aefe3fa16 100644
--- a/pkgs/applications/editors/thonny/default.nix
+++ b/pkgs/applications/editors/thonny/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, python3 }:
+{ lib, fetchFromGitHub, python3 }:
 
 with python3.pkgs;
 
diff --git a/pkgs/applications/editors/tiled/default.nix b/pkgs/applications/editors/tiled/default.nix
index f5306e75a56..b6222c8a6d2 100644
--- a/pkgs/applications/editors/tiled/default.nix
+++ b/pkgs/applications/editors/tiled/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, mkDerivation, fetchFromGitHub, pkg-config, qmake
+{ lib, mkDerivation, fetchFromGitHub, pkg-config, qmake
 , python, qtbase, qttools }:
 
 mkDerivation rec {
diff --git a/pkgs/applications/graphics/displaycal/default.nix b/pkgs/applications/graphics/displaycal/default.nix
index d1cee064aee..3b6bb01bb15 100644
--- a/pkgs/applications/graphics/displaycal/default.nix
+++ b/pkgs/applications/graphics/displaycal/default.nix
@@ -1,5 +1,5 @@
 { python2
-, lib, stdenv
+, lib
 , fetchurl
 , pkg-config
 , libXext
diff --git a/pkgs/applications/graphics/dosage/default.nix b/pkgs/applications/graphics/dosage/default.nix
index b2997c2c474..db0012a184b 100644
--- a/pkgs/applications/graphics/dosage/default.nix
+++ b/pkgs/applications/graphics/dosage/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python3Packages, fetchFromGitHub }:
+{ lib, python3Packages, fetchFromGitHub }:
 
 python3Packages.buildPythonApplication rec {
   pname = "dosage";
diff --git a/pkgs/applications/graphics/freecad/default.nix b/pkgs/applications/graphics/freecad/default.nix
index 3563220f2b8..1c4f05b42da 100644
--- a/pkgs/applications/graphics/freecad/default.nix
+++ b/pkgs/applications/graphics/freecad/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, mkDerivation, fetchFromGitHub, fetchpatch, cmake, ninja, coin3d,
+{ lib, mkDerivation, fetchFromGitHub, fetchpatch, cmake, ninja, coin3d,
 xercesc, ode, eigen, qtbase, qttools, qtwebengine, qtxmlpatterns, wrapQtAppsHook,
 opencascade-occt, gts, hdf5, vtk, medfile, zlib, python3Packages, swig,
 gfortran, libXmu, soqt, libf2c, libGLU, makeWrapper, pkg-config, mpi ? null }:
diff --git a/pkgs/applications/graphics/gimp/wrapper.nix b/pkgs/applications/graphics/gimp/wrapper.nix
index 094dcf0703e..8fde04d0d1d 100644
--- a/pkgs/applications/graphics/gimp/wrapper.nix
+++ b/pkgs/applications/graphics/gimp/wrapper.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, symlinkJoin, gimp, makeWrapper, gimpPlugins, gnome3, plugins ? null}:
+{ lib, symlinkJoin, gimp, makeWrapper, gimpPlugins, gnome3, plugins ? null}:
 
 let
 allPlugins = lib.filter (pkg: lib.isDerivation pkg && !pkg.meta.broken or false) (lib.attrValues gimpPlugins);
diff --git a/pkgs/applications/graphics/gscan2pdf/default.nix b/pkgs/applications/graphics/gscan2pdf/default.nix
index 30c21149827..0e65d3199ab 100644
--- a/pkgs/applications/graphics/gscan2pdf/default.nix
+++ b/pkgs/applications/graphics/gscan2pdf/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, perlPackages, wrapGAppsHook,
+{ lib, fetchurl, perlPackages, wrapGAppsHook,
   # libs
   librsvg, sane-backends, sane-frontends,
   # runtime dependencies
diff --git a/pkgs/applications/graphics/hydrus/default.nix b/pkgs/applications/graphics/hydrus/default.nix
index 95b96bcff1b..f5b8b806215 100644
--- a/pkgs/applications/graphics/hydrus/default.nix
+++ b/pkgs/applications/graphics/hydrus/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , fetchFromGitHub
 , lzma
 , qt5
diff --git a/pkgs/applications/graphics/ipe/default.nix b/pkgs/applications/graphics/ipe/default.nix
index 1ea21506e31..d9c51d38802 100644
--- a/pkgs/applications/graphics/ipe/default.nix
+++ b/pkgs/applications/graphics/ipe/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, makeWrapper, pkg-config, zlib, freetype, cairo, lua5, texlive, ghostscript
+{ lib, fetchurl, makeWrapper, pkg-config, zlib, freetype, cairo, lua5, texlive, ghostscript
 , libjpeg, libpng, qtbase, mkDerivation
 }:
 
diff --git a/pkgs/applications/graphics/kgraphviewer/default.nix b/pkgs/applications/graphics/kgraphviewer/default.nix
index 283ed117954..294b6c4ca70 100644
--- a/pkgs/applications/graphics/kgraphviewer/default.nix
+++ b/pkgs/applications/graphics/kgraphviewer/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, mkDerivation, fetchurl, cmake, extra-cmake-modules, pkg-config, wrapGAppsHook
+{ lib, mkDerivation, fetchurl, cmake, extra-cmake-modules, pkg-config, wrapGAppsHook
 , kconfig, kinit, kdoctools, kio, kparts, kwidgetsaddons
 , qtbase, qtsvg
 , boost, graphviz
diff --git a/pkgs/applications/graphics/krop/default.nix b/pkgs/applications/graphics/krop/default.nix
index 314e4c6ec14..ef335cd6be2 100644
--- a/pkgs/applications/graphics/krop/default.nix
+++ b/pkgs/applications/graphics/krop/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, python3Packages, libsForQt5, ghostscript, qt5}:
+{ lib, fetchFromGitHub, python3Packages, libsForQt5, ghostscript, qt5}:
 
 python3Packages.buildPythonApplication rec {
   pname = "krop";
diff --git a/pkgs/applications/graphics/luminance-hdr/default.nix b/pkgs/applications/graphics/luminance-hdr/default.nix
index 36154af137b..c44ff57d18f 100644
--- a/pkgs/applications/graphics/luminance-hdr/default.nix
+++ b/pkgs/applications/graphics/luminance-hdr/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, mkDerivation, cmake, fetchFromGitHub, pkg-config
+{ lib, mkDerivation, cmake, fetchFromGitHub, pkg-config
 , boost, exiv2, fftwFloat, gsl
 , ilmbase, lcms2, libraw, libtiff, openexr
 , qtbase, qtdeclarative, qttools, qtwebengine, eigen
diff --git a/pkgs/applications/graphics/mcomix3/default.nix b/pkgs/applications/graphics/mcomix3/default.nix
index 81077578eb2..add40043c0f 100644
--- a/pkgs/applications/graphics/mcomix3/default.nix
+++ b/pkgs/applications/graphics/mcomix3/default.nix
@@ -1,5 +1,4 @@
-{ stdenv
-, lib
+{ lib
 , fetchFromGitHub
 , wrapGAppsHook
 , installShellFiles
diff --git a/pkgs/applications/graphics/meme/default.nix b/pkgs/applications/graphics/meme/default.nix
index c894de2c933..d06ff027c5b 100644
--- a/pkgs/applications/graphics/meme/default.nix
+++ b/pkgs/applications/graphics/meme/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , unstableGitUpdater
 , buildGoModule
 , fetchFromGitHub
diff --git a/pkgs/applications/graphics/mypaint/default.nix b/pkgs/applications/graphics/mypaint/default.nix
index 9da9c20942e..7b83bdec8c6 100644
--- a/pkgs/applications/graphics/mypaint/default.nix
+++ b/pkgs/applications/graphics/mypaint/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , fetchFromGitHub
 , gtk3
 , gettext
diff --git a/pkgs/applications/graphics/nomacs/default.nix b/pkgs/applications/graphics/nomacs/default.nix
index 8a3e41965ff..bd6d732ac68 100644
--- a/pkgs/applications/graphics/nomacs/default.nix
+++ b/pkgs/applications/graphics/nomacs/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , mkDerivation
 , fetchFromGitHub
 , fetchpatch
diff --git a/pkgs/applications/graphics/paraview/default.nix b/pkgs/applications/graphics/paraview/default.nix
index 7bbff5499f6..79feab3ab7a 100644
--- a/pkgs/applications/graphics/paraview/default.nix
+++ b/pkgs/applications/graphics/paraview/default.nix
@@ -1,6 +1,6 @@
 { boost, cmake, fetchFromGitHub, ffmpeg, qtbase, qtx11extras,
   qttools, qtxmlpatterns, qtsvg, gdal, gfortran, libXt, makeWrapper,
-  mkDerivation, ninja, mpi, python3, lib, stdenv, tbb, libGLU, libGL }:
+  mkDerivation, ninja, mpi, python3, lib, tbb, libGLU, libGL }:
 
 mkDerivation rec {
   pname = "paraview";
diff --git a/pkgs/applications/graphics/pdfcpu/default.nix b/pkgs/applications/graphics/pdfcpu/default.nix
index bcc09498121..857a68df092 100644
--- a/pkgs/applications/graphics/pdfcpu/default.nix
+++ b/pkgs/applications/graphics/pdfcpu/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "pdfcpu";
diff --git a/pkgs/applications/graphics/photoflare/default.nix b/pkgs/applications/graphics/photoflare/default.nix
index ca2455dd048..0c25364b76a 100644
--- a/pkgs/applications/graphics/photoflare/default.nix
+++ b/pkgs/applications/graphics/photoflare/default.nix
@@ -1,4 +1,4 @@
-{ mkDerivation, lib, stdenv, graphicsmagick, fetchFromGitHub, qmake, qtbase, qttools
+{ mkDerivation, lib, graphicsmagick, fetchFromGitHub, qmake, qtbase, qttools
 }:
 
 mkDerivation rec {
diff --git a/pkgs/applications/graphics/photoqt/default.nix b/pkgs/applications/graphics/photoqt/default.nix
index fe49d5fa154..52e38b23c1f 100644
--- a/pkgs/applications/graphics/photoqt/default.nix
+++ b/pkgs/applications/graphics/photoqt/default.nix
@@ -1,4 +1,4 @@
-{ mkDerivation, lib, stdenv, fetchurl, cmake, exiv2, graphicsmagick, libraw, fetchpatch
+{ mkDerivation, lib, fetchurl, cmake, exiv2, graphicsmagick, libraw, fetchpatch
 , qtbase, qtdeclarative, qtmultimedia, qtquickcontrols, qttools, qtgraphicaleffects
 , extra-cmake-modules, poppler, kimageformats, libarchive, libdevil
 }:
diff --git a/pkgs/applications/graphics/phototonic/default.nix b/pkgs/applications/graphics/phototonic/default.nix
index 21960358a7b..5044e60161c 100644
--- a/pkgs/applications/graphics/phototonic/default.nix
+++ b/pkgs/applications/graphics/phototonic/default.nix
@@ -1,4 +1,4 @@
-{ mkDerivation, lib, stdenv, fetchFromGitHub, qtbase, qmake, exiv2 }:
+{ mkDerivation, lib, fetchFromGitHub, qtbase, qmake, exiv2 }:
 
 mkDerivation rec {
   pname = "phototonic";
diff --git a/pkgs/applications/graphics/pick-colour-picker/default.nix b/pkgs/applications/graphics/pick-colour-picker/default.nix
index d4788b3c1e7..e3ab0c772a1 100644
--- a/pkgs/applications/graphics/pick-colour-picker/default.nix
+++ b/pkgs/applications/graphics/pick-colour-picker/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , fetchFromGitHub
 , buildPythonPackage
 , pygobject3
diff --git a/pkgs/applications/graphics/pinta/default.nix b/pkgs/applications/graphics/pinta/default.nix
index 8b6e581ae0b..2635b2d3d88 100644
--- a/pkgs/applications/graphics/pinta/default.nix
+++ b/pkgs/applications/graphics/pinta/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, buildDotnetPackage, dotnetPackages, gtksharp,
+{ lib, fetchFromGitHub, buildDotnetPackage, dotnetPackages, gtksharp,
   gettext }:
 
 let
diff --git a/pkgs/applications/graphics/qcomicbook/default.nix b/pkgs/applications/graphics/qcomicbook/default.nix
index c4fc79c7fec..47bf2d95028 100644
--- a/pkgs/applications/graphics/qcomicbook/default.nix
+++ b/pkgs/applications/graphics/qcomicbook/default.nix
@@ -1,4 +1,4 @@
-{ mkDerivation, lib, stdenv, fetchFromGitHub, pkg-config, cmake, qtbase, qttools, qtx11extras, poppler }:
+{ mkDerivation, lib, fetchFromGitHub, pkg-config, cmake, qtbase, qttools, qtx11extras, poppler }:
 
 mkDerivation rec {
   pname = "qcomicbook";
diff --git a/pkgs/applications/graphics/rapid-photo-downloader/default.nix b/pkgs/applications/graphics/rapid-photo-downloader/default.nix
index 26522d78bcd..f444ebfe5be 100644
--- a/pkgs/applications/graphics/rapid-photo-downloader/default.nix
+++ b/pkgs/applications/graphics/rapid-photo-downloader/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, mkDerivationWith, fetchurl, python3Packages
+{ lib, mkDerivationWith, fetchurl, python3Packages
 , file, intltool, gobject-introspection, libgudev
 , udisks, gexiv2, gst_all_1, libnotify
 , exiftool, gdk-pixbuf, libmediainfo, vmtouch
diff --git a/pkgs/applications/graphics/renderdoc/default.nix b/pkgs/applications/graphics/renderdoc/default.nix
index b985ae7d571..c51794881e9 100644
--- a/pkgs/applications/graphics/renderdoc/default.nix
+++ b/pkgs/applications/graphics/renderdoc/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, cmake, pkg-config, mkDerivation
+{ lib, fetchFromGitHub, cmake, pkg-config, mkDerivation
 , qtbase, qtx11extras, qtsvg, makeWrapper
 , vulkan-loader, libglvnd, xorg, python3, python3Packages
 , bison, pcre, automake, autoconf, addOpenGLRunpath
diff --git a/pkgs/applications/graphics/scantailor/advanced.nix b/pkgs/applications/graphics/scantailor/advanced.nix
index 361f1fa1809..048b8b56fc0 100644
--- a/pkgs/applications/graphics/scantailor/advanced.nix
+++ b/pkgs/applications/graphics/scantailor/advanced.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, mkDerivation
+{ lib, fetchFromGitHub, mkDerivation
 , cmake, libjpeg, libpng, libtiff, boost
 , qtbase, qttools }:
 
diff --git a/pkgs/applications/graphics/tesseract/wrapper.nix b/pkgs/applications/graphics/tesseract/wrapper.nix
index 22751f38fe1..313920d8154 100644
--- a/pkgs/applications/graphics/tesseract/wrapper.nix
+++ b/pkgs/applications/graphics/tesseract/wrapper.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, makeWrapper, tesseractBase, languages
+{ lib, makeWrapper, tesseractBase, languages
 
 # A list of languages like [ "eng" "spa" … ] or `null` for all available languages
 , enableLanguages ? null
diff --git a/pkgs/applications/logging/humioctl/default.nix b/pkgs/applications/logging/humioctl/default.nix
index 0130017356c..f3aef213ad2 100644
--- a/pkgs/applications/logging/humioctl/default.nix
+++ b/pkgs/applications/logging/humioctl/default.nix
@@ -1,4 +1,4 @@
-{ buildGoModule, fetchFromGitHub, installShellFiles, lib, stdenv }:
+{ buildGoModule, fetchFromGitHub, installShellFiles, lib }:
 
 let
   humioCtlVersion = "0.28.2";
diff --git a/pkgs/applications/misc/antfs-cli/default.nix b/pkgs/applications/misc/antfs-cli/default.nix
index 133194f7af5..516b786222d 100644
--- a/pkgs/applications/misc/antfs-cli/default.nix
+++ b/pkgs/applications/misc/antfs-cli/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, python3Packages }:
+{ lib, fetchFromGitHub, python3Packages }:
 
 python3Packages.buildPythonApplication {
   pname = "antfs-cli";
diff --git a/pkgs/applications/misc/ape/apeclex.nix b/pkgs/applications/misc/ape/apeclex.nix
index b01bfbedb8a..81096d9877f 100644
--- a/pkgs/applications/misc/ape/apeclex.nix
+++ b/pkgs/applications/misc/ape/apeclex.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, attemptoClex, callPackage }:
+{ lib, attemptoClex, callPackage }:
 
 callPackage ./. {
   pname = "ape-clex";
diff --git a/pkgs/applications/misc/archivy/default.nix b/pkgs/applications/misc/archivy/default.nix
index c94011466ec..4fa3d5cf419 100644
--- a/pkgs/applications/misc/archivy/default.nix
+++ b/pkgs/applications/misc/archivy/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, python3, fetchPypi, appdirs, attrs, requests,
+{ lib, python3, fetchPypi, appdirs, attrs, requests,
 beautifulsoup4, click-plugins, elasticsearch, flask_login, flask_wtf,
 pypandoc, python-dotenv, python-frontmatter, tinydb, validators,
 watchdog, wtforms }:
diff --git a/pkgs/applications/misc/ausweisapp2/default.nix b/pkgs/applications/misc/ausweisapp2/default.nix
index 82e7c1bb21b..bd3194e3fea 100644
--- a/pkgs/applications/misc/ausweisapp2/default.nix
+++ b/pkgs/applications/misc/ausweisapp2/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, mkDerivation, fetchFromGitHub, cmake, pkg-config, pcsclite, qtsvg, qttools, qtwebsockets
+{ lib, mkDerivation, fetchFromGitHub, cmake, pkg-config, pcsclite, qtsvg, qttools, qtwebsockets
 , qtquickcontrols2, qtgraphicaleffects }:
 
 mkDerivation rec {
diff --git a/pkgs/applications/misc/autospotting/default.nix b/pkgs/applications/misc/autospotting/default.nix
index 0b57ad29266..ac929bfa5b1 100644
--- a/pkgs/applications/misc/autospotting/default.nix
+++ b/pkgs/applications/misc/autospotting/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage {
   pname = "autospotting";
diff --git a/pkgs/applications/misc/barrier/default.nix b/pkgs/applications/misc/barrier/default.nix
index fa5980b115e..b9dbcf529be 100644
--- a/pkgs/applications/misc/barrier/default.nix
+++ b/pkgs/applications/misc/barrier/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, cmake, curl, xorg, avahi, qtbase, mkDerivation,
+{ lib, fetchFromGitHub, cmake, curl, xorg, avahi, qtbase, mkDerivation,
   openssl, wrapGAppsHook,
   avahiWithLibdnssdCompat ? avahi.override { withLibdnssdCompat = true; }
 }:
diff --git a/pkgs/applications/misc/bibletime/default.nix b/pkgs/applications/misc/bibletime/default.nix
index 3213ed9edf0..eb909155e4e 100644
--- a/pkgs/applications/misc/bibletime/default.nix
+++ b/pkgs/applications/misc/bibletime/default.nix
@@ -1,4 +1,4 @@
-{ lib, mkDerivation, stdenv, fetchurl, cmake, pkg-config, sword, boost, clucene_core
+{ lib, mkDerivation, fetchurl, cmake, pkg-config, sword, boost, clucene_core
 , qtbase, qttools, qtsvg, qtwebkit
 }:
 
diff --git a/pkgs/applications/misc/bleachbit/default.nix b/pkgs/applications/misc/bleachbit/default.nix
index 89686e50d17..952d1fe16db 100644
--- a/pkgs/applications/misc/bleachbit/default.nix
+++ b/pkgs/applications/misc/bleachbit/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , python3Packages
 , fetchurl
 , gettext
diff --git a/pkgs/applications/misc/break-time/default.nix b/pkgs/applications/misc/break-time/default.nix
index 05815e242f0..3458ac3f250 100644
--- a/pkgs/applications/misc/break-time/default.nix
+++ b/pkgs/applications/misc/break-time/default.nix
@@ -5,7 +5,7 @@
 , pkg-config
 , python3
 , rustPlatform
-, lib, stdenv
+, lib
 , wrapGAppsHook
 }:
 
diff --git a/pkgs/applications/misc/buku/default.nix b/pkgs/applications/misc/buku/default.nix
index 772754ecc6d..68b4f7b3e56 100644
--- a/pkgs/applications/misc/buku/default.nix
+++ b/pkgs/applications/misc/buku/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python3, fetchFromGitHub }:
+{ lib, python3, fetchFromGitHub }:
 
 with python3.pkgs; buildPythonApplication rec {
   version = "4.5";
diff --git a/pkgs/applications/misc/candle/default.nix b/pkgs/applications/misc/candle/default.nix
index d3357b41bd2..8df75b0cbd1 100644
--- a/pkgs/applications/misc/candle/default.nix
+++ b/pkgs/applications/misc/candle/default.nix
@@ -1,4 +1,4 @@
-{ mkDerivation, lib, stdenv, fetchFromGitHub, qtbase, qtserialport, qmake }:
+{ mkDerivation, lib, fetchFromGitHub, qtbase, qtserialport, qmake }:
 
 mkDerivation rec {
   pname = "candle";
diff --git a/pkgs/applications/misc/cheat/default.nix b/pkgs/applications/misc/cheat/default.nix
index 988af330deb..90eb38329a3 100644
--- a/pkgs/applications/misc/cheat/default.nix
+++ b/pkgs/applications/misc/cheat/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub
+{ lib, fetchFromGitHub
 , buildGoModule, installShellFiles }:
 
 buildGoModule rec {
diff --git a/pkgs/applications/misc/chewing-editor/default.nix b/pkgs/applications/misc/chewing-editor/default.nix
index fb5d9aed959..13ee17999fe 100644
--- a/pkgs/applications/misc/chewing-editor/default.nix
+++ b/pkgs/applications/misc/chewing-editor/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, mkDerivation, fetchFromGitHub, cmake, pkg-config, libchewing, qtbase
+{ lib, mkDerivation, fetchFromGitHub, cmake, pkg-config, libchewing, qtbase
 , qttools }:
 
 mkDerivation rec {
diff --git a/pkgs/applications/misc/coursera-dl/default.nix b/pkgs/applications/misc/coursera-dl/default.nix
index 631d53b506f..56938f5338d 100644
--- a/pkgs/applications/misc/coursera-dl/default.nix
+++ b/pkgs/applications/misc/coursera-dl/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, glibcLocales, pandoc, python3 }:
+{ lib, fetchFromGitHub, glibcLocales, pandoc, python3 }:
 
 let
   pythonPackages = python3.pkgs;
diff --git a/pkgs/applications/misc/crow-translate/default.nix b/pkgs/applications/misc/crow-translate/default.nix
index 7b9d7faba94..8cb87274c1d 100644
--- a/pkgs/applications/misc/crow-translate/default.nix
+++ b/pkgs/applications/misc/crow-translate/default.nix
@@ -1,5 +1,5 @@
 { lib
-, stdenv
+
 , mkDerivation
 , fetchFromGitHub
 , substituteAll
diff --git a/pkgs/applications/misc/cum/default.nix b/pkgs/applications/misc/cum/default.nix
index 6b851e80f34..42df68f6721 100644
--- a/pkgs/applications/misc/cum/default.nix
+++ b/pkgs/applications/misc/cum/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python3Packages }:
+{ lib, python3Packages }:
 
 with python3Packages;
 
diff --git a/pkgs/applications/misc/cura/lulzbot/libarcus.nix b/pkgs/applications/misc/cura/lulzbot/libarcus.nix
index 1e186bdf5fd..7b1dbf4d85e 100644
--- a/pkgs/applications/misc/cura/lulzbot/libarcus.nix
+++ b/pkgs/applications/misc/cura/lulzbot/libarcus.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchgit, fetchurl, cmake, sip, protobuf, pythonOlder }:
+{ lib, buildPythonPackage, fetchgit, fetchurl, cmake, sip, protobuf, pythonOlder }:
 
 buildPythonPackage {
   pname = "libarcus";
diff --git a/pkgs/applications/misc/cura/lulzbot/libsavitar.nix b/pkgs/applications/misc/cura/lulzbot/libsavitar.nix
index fb920235031..f12059e6317 100644
--- a/pkgs/applications/misc/cura/lulzbot/libsavitar.nix
+++ b/pkgs/applications/misc/cura/lulzbot/libsavitar.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, pythonOlder, fetchgit, cmake, sip }:
+{ lib, buildPythonPackage, pythonOlder, fetchgit, cmake, sip }:
 
 buildPythonPackage {
   pname = "libsavitar-lulzbot";
diff --git a/pkgs/applications/misc/cura/lulzbot/uranium.nix b/pkgs/applications/misc/cura/lulzbot/uranium.nix
index 77a4f3edef6..01166092b2b 100644
--- a/pkgs/applications/misc/cura/lulzbot/uranium.nix
+++ b/pkgs/applications/misc/cura/lulzbot/uranium.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, callPackage, fetchurl, fetchgit, buildPythonPackage, fetchFromGitHub, python, cmake
+{ lib, callPackage, fetchurl, fetchgit, buildPythonPackage, fetchFromGitHub, python, cmake
 , pyqt5, numpy, scipy, shapely, libarcusLulzbot, doxygen, gettext, pythonOlder }:
 
 buildPythonPackage {
diff --git a/pkgs/applications/misc/dasel/default.nix b/pkgs/applications/misc/dasel/default.nix
index 3a46b5e2f9a..20742311375 100644
--- a/pkgs/applications/misc/dasel/default.nix
+++ b/pkgs/applications/misc/dasel/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildGoModule
 , fetchFromGitHub
 }:
diff --git a/pkgs/applications/misc/devdocs-desktop/default.nix b/pkgs/applications/misc/devdocs-desktop/default.nix
index 3425ceb44a9..fe15d90f254 100644
--- a/pkgs/applications/misc/devdocs-desktop/default.nix
+++ b/pkgs/applications/misc/devdocs-desktop/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, appimageTools, fetchurl, gsettings-desktop-schemas, gtk3 }:
+{ lib, appimageTools, fetchurl, gsettings-desktop-schemas, gtk3 }:
 
 let
   version = "0.7.1";
diff --git a/pkgs/applications/misc/dfilemanager/default.nix b/pkgs/applications/misc/dfilemanager/default.nix
index 6af92285c2b..19cfa95a88e 100644
--- a/pkgs/applications/misc/dfilemanager/default.nix
+++ b/pkgs/applications/misc/dfilemanager/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, mkDerivation, fetchFromGitHub, cmake, file, qtbase, qttools, solid }:
+{ lib, mkDerivation, fetchFromGitHub, cmake, file, qtbase, qttools, solid }:
 
 mkDerivation {
   pname = "dfilemanager";
diff --git a/pkgs/applications/misc/diffpdf/default.nix b/pkgs/applications/misc/diffpdf/default.nix
index c1a4d5e4440..30715dd51f3 100644
--- a/pkgs/applications/misc/diffpdf/default.nix
+++ b/pkgs/applications/misc/diffpdf/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, mkDerivation, fetchurl, fetchpatch, qmake, qttools, qtbase, poppler }:
+{ lib, mkDerivation, fetchurl, fetchpatch, qmake, qttools, qtbase, poppler }:
 
 mkDerivation rec {
   version = "2.1.3";
diff --git a/pkgs/applications/misc/dmensamenu/default.nix b/pkgs/applications/misc/dmensamenu/default.nix
index a0b4237c7f6..a8817a542e3 100644
--- a/pkgs/applications/misc/dmensamenu/default.nix
+++ b/pkgs/applications/misc/dmensamenu/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonApplication, fetchFromGitHub, substituteAll, requests, dmenu }:
+{ lib, buildPythonApplication, fetchFromGitHub, substituteAll, requests, dmenu }:
 
 buildPythonApplication rec {
   pname = "dmensamenu";
diff --git a/pkgs/applications/misc/dockbarx/default.nix b/pkgs/applications/misc/dockbarx/default.nix
index e0e9fcd6feb..b31c17cc319 100644
--- a/pkgs/applications/misc/dockbarx/default.nix
+++ b/pkgs/applications/misc/dockbarx/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, pythonPackages, gnome2, keybinder }:
+{ lib, fetchFromGitHub, pythonPackages, gnome2, keybinder }:
 
 pythonPackages.buildPythonApplication rec {
   ver = "0.93";
diff --git a/pkgs/applications/misc/dotfiles/default.nix b/pkgs/applications/misc/dotfiles/default.nix
index 913ed9523ba..911a319a963 100644
--- a/pkgs/applications/misc/dotfiles/default.nix
+++ b/pkgs/applications/misc/dotfiles/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, pythonPackages }:
+{ lib, pythonPackages }:
 
 pythonPackages.buildPythonApplication rec {
   pname = "dotfiles";
diff --git a/pkgs/applications/misc/dstask/default.nix b/pkgs/applications/misc/dstask/default.nix
index 78efa133c1e..cd1c659ec5b 100644
--- a/pkgs/applications/misc/dstask/default.nix
+++ b/pkgs/applications/misc/dstask/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "dstask";
diff --git a/pkgs/applications/misc/dupeguru/default.nix b/pkgs/applications/misc/dupeguru/default.nix
index 418658fec22..d2332b4d9c7 100644
--- a/pkgs/applications/misc/dupeguru/default.nix
+++ b/pkgs/applications/misc/dupeguru/default.nix
@@ -1,4 +1,4 @@
-{lib, stdenv, python3Packages, fetchpatch, gettext, qt5, fetchFromGitHub}:
+{lib, python3Packages, fetchpatch, gettext, qt5, fetchFromGitHub}:
 
 python3Packages.buildPythonApplication rec {
   pname = "dupeguru";
diff --git a/pkgs/applications/misc/electrum/dash.nix b/pkgs/applications/misc/electrum/dash.nix
index 29ac8b4484b..d0606001ad4 100644
--- a/pkgs/applications/misc/electrum/dash.nix
+++ b/pkgs/applications/misc/electrum/dash.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, python2Packages }:
+{ lib, fetchurl, python2Packages }:
 
 python2Packages.buildPythonApplication rec {
   version = "2.9.3.1";
diff --git a/pkgs/applications/misc/electrum/ltc.nix b/pkgs/applications/misc/electrum/ltc.nix
index ad6ed6f7a78..bd015afdc57 100644
--- a/pkgs/applications/misc/electrum/ltc.nix
+++ b/pkgs/applications/misc/electrum/ltc.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , fetchurl
 , python3Packages
 , wrapQtAppsHook
diff --git a/pkgs/applications/misc/elfx86exts/default.nix b/pkgs/applications/misc/elfx86exts/default.nix
index 8fc7fb32743..690b88d8417 100644
--- a/pkgs/applications/misc/elfx86exts/default.nix
+++ b/pkgs/applications/misc/elfx86exts/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , rustPlatform
 , fetchFromGitHub
 }:
diff --git a/pkgs/applications/misc/exercism/default.nix b/pkgs/applications/misc/exercism/default.nix
index 1eeeba1b439..79420eacec8 100644
--- a/pkgs/applications/misc/exercism/default.nix
+++ b/pkgs/applications/misc/exercism/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "exercism";
diff --git a/pkgs/applications/misc/expenses/default.nix b/pkgs/applications/misc/expenses/default.nix
index 7f932b5b1e5..63f942c2c59 100644
--- a/pkgs/applications/misc/expenses/default.nix
+++ b/pkgs/applications/misc/expenses/default.nix
@@ -1,5 +1,5 @@
 { lib
-, stdenv
+
 , buildGoModule
 , fetchFromGitHub
 , sqlite
diff --git a/pkgs/applications/misc/fbmenugen/default.nix b/pkgs/applications/misc/fbmenugen/default.nix
index 26b8beab19c..36629179ab5 100644
--- a/pkgs/applications/misc/fbmenugen/default.nix
+++ b/pkgs/applications/misc/fbmenugen/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , fetchFromGitHub
 , fluxbox
 , gnused
diff --git a/pkgs/applications/misc/geoipupdate/default.nix b/pkgs/applications/misc/geoipupdate/default.nix
index 1e0aba0400f..12b5a38877a 100644
--- a/pkgs/applications/misc/geoipupdate/default.nix
+++ b/pkgs/applications/misc/geoipupdate/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "geoipupdate";
diff --git a/pkgs/applications/misc/get_iplayer/default.nix b/pkgs/applications/misc/get_iplayer/default.nix
index 6664974a41a..d4f50451719 100644
--- a/pkgs/applications/misc/get_iplayer/default.nix
+++ b/pkgs/applications/misc/get_iplayer/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, atomicparsley, flvstreamer, ffmpeg_3, makeWrapper, perl, perlPackages, rtmpdump}:
+{ lib, fetchFromGitHub, atomicparsley, flvstreamer, ffmpeg_3, makeWrapper, perl, perlPackages, rtmpdump}:
 
 with lib;
 
diff --git a/pkgs/applications/misc/go-jira/default.nix b/pkgs/applications/misc/go-jira/default.nix
index c2871766deb..2f2a0a22126 100644
--- a/pkgs/applications/misc/go-jira/default.nix
+++ b/pkgs/applications/misc/go-jira/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "go-jira";
diff --git a/pkgs/applications/misc/golden-cheetah/default.nix b/pkgs/applications/misc/golden-cheetah/default.nix
index 57e2d95f043..fa58c2d3965 100644
--- a/pkgs/applications/misc/golden-cheetah/default.nix
+++ b/pkgs/applications/misc/golden-cheetah/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, fetchpatch, mkDerivation
+{ lib, fetchFromGitHub, fetchpatch, mkDerivation
 , qtbase, qtsvg, qtserialport, qtwebengine, qtmultimedia, qttools
 , qtconnectivity, qtcharts, libusb-compat-0_1
 , yacc, flex, zlib, qmake, makeDesktopItem, makeWrapper
diff --git a/pkgs/applications/misc/gpsbabel/gui.nix b/pkgs/applications/misc/gpsbabel/gui.nix
index 3de63203f24..4025b313128 100644
--- a/pkgs/applications/misc/gpsbabel/gui.nix
+++ b/pkgs/applications/misc/gpsbabel/gui.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, mkDerivation, qmake, qttools, qtwebkit, qttranslations, gpsbabel }:
+{ lib, mkDerivation, qmake, qttools, qtwebkit, qttranslations, gpsbabel }:
 
 mkDerivation {
   pname = "gpsbabel-gui";
diff --git a/pkgs/applications/misc/gramps/default.nix b/pkgs/applications/misc/gramps/default.nix
index 4fc4586ca4e..1628f0473fa 100644
--- a/pkgs/applications/misc/gramps/default.nix
+++ b/pkgs/applications/misc/gramps/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, gtk3, pythonPackages, intltool, gexiv2,
+{ lib, fetchFromGitHub, gtk3, pythonPackages, intltool, gexiv2,
   pango, gobject-introspection, wrapGAppsHook, gettext,
 # Optional packages:
  enableOSM ? true, osm-gps-map,
diff --git a/pkgs/applications/misc/gsctl/default.nix b/pkgs/applications/misc/gsctl/default.nix
index 101baa09396..15d8b966396 100644
--- a/pkgs/applications/misc/gsctl/default.nix
+++ b/pkgs/applications/misc/gsctl/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "gsctl";
diff --git a/pkgs/applications/misc/hamster/default.nix b/pkgs/applications/misc/hamster/default.nix
index 855123ef793..dbf7e1aee74 100644
--- a/pkgs/applications/misc/hamster/default.nix
+++ b/pkgs/applications/misc/hamster/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, python3Packages, intltool, glib, itstool
+{ lib, fetchFromGitHub, python3Packages, intltool, glib, itstool
 , wrapGAppsHook, gobject-introspection, pango, gdk-pixbuf, atk, wafHook }:
 
 python3Packages.buildPythonApplication rec {
diff --git a/pkgs/applications/misc/haxor-news/default.nix b/pkgs/applications/misc/haxor-news/default.nix
index 467cbfad656..fc9607e7be6 100644
--- a/pkgs/applications/misc/haxor-news/default.nix
+++ b/pkgs/applications/misc/haxor-news/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, python3, fetchpatch }:
+{ lib, fetchFromGitHub, python3, fetchpatch }:
 
 
 let
diff --git a/pkgs/applications/misc/hivemind/default.nix b/pkgs/applications/misc/hivemind/default.nix
index fc22d3a854a..6ada1fd749b 100644
--- a/pkgs/applications/misc/hivemind/default.nix
+++ b/pkgs/applications/misc/hivemind/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub, runtimeShell }:
+{ lib, buildGoPackage, fetchFromGitHub, runtimeShell }:
 
 buildGoPackage rec {
   pname = "hivemind";
diff --git a/pkgs/applications/misc/hugo/default.nix b/pkgs/applications/misc/hugo/default.nix
index 2d2ccefe934..35246a45da2 100644
--- a/pkgs/applications/misc/hugo/default.nix
+++ b/pkgs/applications/misc/hugo/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "hugo";
diff --git a/pkgs/applications/misc/jrnl/default.nix b/pkgs/applications/misc/jrnl/default.nix
index 7fc8ef88330..79f87612e49 100644
--- a/pkgs/applications/misc/jrnl/default.nix
+++ b/pkgs/applications/misc/jrnl/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , python3
 }:
 
diff --git a/pkgs/applications/misc/k4dirstat/default.nix b/pkgs/applications/misc/k4dirstat/default.nix
index 341341c3ca8..467945af6ac 100644
--- a/pkgs/applications/misc/k4dirstat/default.nix
+++ b/pkgs/applications/misc/k4dirstat/default.nix
@@ -6,7 +6,7 @@
 , kio
 , kjobwidgets
 , kxmlgui
-, lib, stdenv
+, lib
 }:
 
 mkDerivation rec {
diff --git a/pkgs/applications/misc/keepass/default.nix b/pkgs/applications/misc/keepass/default.nix
index c1d9448c6a6..59d986321dd 100644
--- a/pkgs/applications/misc/keepass/default.nix
+++ b/pkgs/applications/misc/keepass/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, fetchurl, buildDotnetPackage, substituteAll, makeWrapper, makeDesktopItem,
+{ lib, fetchurl, buildDotnetPackage, substituteAll, makeWrapper, makeDesktopItem,
   unzip, icoutils, gtk2, xorg, xdotool, xsel, coreutils, unixtools, glib, plugins ? [] }:
 
 with builtins; buildDotnetPackage rec {
diff --git a/pkgs/applications/misc/khard/default.nix b/pkgs/applications/misc/khard/default.nix
index 5effc88acb0..3bec8db0687 100644
--- a/pkgs/applications/misc/khard/default.nix
+++ b/pkgs/applications/misc/khard/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, glibcLocales, python3 }:
+{ lib, glibcLocales, python3 }:
 
 python3.pkgs.buildPythonApplication rec {
   version = "0.17.0";
diff --git a/pkgs/applications/misc/kondo/default.nix b/pkgs/applications/misc/kondo/default.nix
index 545dc85efeb..dcbeb408759 100644
--- a/pkgs/applications/misc/kondo/default.nix
+++ b/pkgs/applications/misc/kondo/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, rustPlatform, fetchFromGitHub }:
+{ lib, rustPlatform, fetchFromGitHub }:
 
 rustPlatform.buildRustPackage rec {
   pname = "kondo";
diff --git a/pkgs/applications/misc/kupfer/default.nix b/pkgs/applications/misc/kupfer/default.nix
index ce21ea75b30..243583b8762 100644
--- a/pkgs/applications/misc/kupfer/default.nix
+++ b/pkgs/applications/misc/kupfer/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , fetchurl
 , intltool
 , python3Packages
diff --git a/pkgs/applications/misc/loxodo/default.nix b/pkgs/applications/misc/loxodo/default.nix
index e32535d4445..65f9a9f0f17 100644
--- a/pkgs/applications/misc/loxodo/default.nix
+++ b/pkgs/applications/misc/loxodo/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python27Packages, fetchgit }:
+{ lib, python27Packages, fetchgit }:
 let
   py = python27Packages;
   python = py.python;
diff --git a/pkgs/applications/misc/madonctl/default.nix b/pkgs/applications/misc/madonctl/default.nix
index 249ed48bd1c..2a65fc25af2 100644
--- a/pkgs/applications/misc/madonctl/default.nix
+++ b/pkgs/applications/misc/madonctl/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "madonctl";
diff --git a/pkgs/applications/misc/mediaelch/default.nix b/pkgs/applications/misc/mediaelch/default.nix
index f19cbee8b79..4adfe0f6526 100644
--- a/pkgs/applications/misc/mediaelch/default.nix
+++ b/pkgs/applications/misc/mediaelch/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , mkDerivation
 , fetchFromGitHub
 , qmake
diff --git a/pkgs/applications/misc/menumaker/default.nix b/pkgs/applications/misc/menumaker/default.nix
index 192228de5d9..086db35a5ad 100644
--- a/pkgs/applications/misc/menumaker/default.nix
+++ b/pkgs/applications/misc/menumaker/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, pythonPackages }:
+{ lib, fetchurl, pythonPackages }:
 
 pythonPackages.buildPythonApplication rec {
   pname = "menumaker";
diff --git a/pkgs/applications/misc/mop/default.nix b/pkgs/applications/misc/mop/default.nix
index 07102fe56f2..007965f868b 100644
--- a/pkgs/applications/misc/mop/default.nix
+++ b/pkgs/applications/misc/mop/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchgit }:
+{ lib, buildGoPackage, fetchgit }:
 
 buildGoPackage rec {
   pname = "mop";
diff --git a/pkgs/applications/misc/mqtt-bench/default.nix b/pkgs/applications/misc/mqtt-bench/default.nix
index c01a1b9cbc6..657ac9645de 100644
--- a/pkgs/applications/misc/mqtt-bench/default.nix
+++ b/pkgs/applications/misc/mqtt-bench/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub, fetchpatch }:
+{ lib, buildGoPackage, fetchFromGitHub, fetchpatch }:
 
 buildGoPackage rec {
   pname = "mqtt-bench";
diff --git a/pkgs/applications/misc/multibootusb/default.nix b/pkgs/applications/misc/multibootusb/default.nix
index 173291183da..fd1ca666589 100644
--- a/pkgs/applications/misc/multibootusb/default.nix
+++ b/pkgs/applications/misc/multibootusb/default.nix
@@ -1,6 +1,6 @@
 { fetchFromGitHub, libxcb, mtools, p7zip, parted, procps, qemu, unzip, zip,
   coreutils, gnugrep, which, gnused, e2fsprogs, autoPatchelfHook, gptfdisk,
-  python36Packages, qt5, runtimeShell, lib, stdenv, util-linux, wrapQtAppsHook }:
+  python36Packages, qt5, runtimeShell, lib, util-linux, wrapQtAppsHook }:
 
 # Note: Multibootusb is tricky to maintain. It relies on the
 # $PYTHONPATH variable containing some of their code, so that
diff --git a/pkgs/applications/misc/nixnote2/default.nix b/pkgs/applications/misc/nixnote2/default.nix
index b23c41e6fee..cbb7a110c4c 100644
--- a/pkgs/applications/misc/nixnote2/default.nix
+++ b/pkgs/applications/misc/nixnote2/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, mkDerivation, fetchFromGitHub, boost
+{ lib, mkDerivation, fetchFromGitHub, boost
 , qtbase, qtwebkit, poppler, qmake, hunspell, html-tidy}:
 
 mkDerivation rec {
diff --git a/pkgs/applications/misc/ocropus/default.nix b/pkgs/applications/misc/ocropus/default.nix
index 2b0986eeba6..507399c012b 100644
--- a/pkgs/applications/misc/ocropus/default.nix
+++ b/pkgs/applications/misc/ocropus/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, fetchurl, pythonPackages, curl }:
+{ lib, fetchFromGitHub, fetchurl, pythonPackages, curl }:
 
 let
   getmodel = name: sha256: {
diff --git a/pkgs/applications/misc/onboard/default.nix b/pkgs/applications/misc/onboard/default.nix
index 42433936aba..d52120e0fb7 100644
--- a/pkgs/applications/misc/onboard/default.nix
+++ b/pkgs/applications/misc/onboard/default.nix
@@ -1,5 +1,5 @@
 { fetchurl
-, lib, stdenv
+, lib
 , substituteAll
 , aspellWithDicts
 , at-spi2-core ? null
diff --git a/pkgs/applications/misc/opentx/default.nix b/pkgs/applications/misc/opentx/default.nix
index bb8f8d4013f..2ca4e3203ac 100644
--- a/pkgs/applications/misc/opentx/default.nix
+++ b/pkgs/applications/misc/opentx/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, mkDerivation, fetchFromGitHub
+{ lib, mkDerivation, fetchFromGitHub
 , cmake, gcc-arm-embedded, python3Packages
 , qtbase, qtmultimedia, qttranslations, SDL, gtest
 , dfu-util, avrdude
diff --git a/pkgs/applications/misc/orca/default.nix b/pkgs/applications/misc/orca/default.nix
index 25cca1536f8..72d68431b8c 100644
--- a/pkgs/applications/misc/orca/default.nix
+++ b/pkgs/applications/misc/orca/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , pkg-config
 , fetchurl
 , buildPythonApplication
diff --git a/pkgs/applications/misc/pass-secret-service/default.nix b/pkgs/applications/misc/pass-secret-service/default.nix
index f2386a5cd83..932fa588d27 100644
--- a/pkgs/applications/misc/pass-secret-service/default.nix
+++ b/pkgs/applications/misc/pass-secret-service/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, python3, dbus, gnupg }:
+{ lib, fetchFromGitHub, python3, dbus, gnupg }:
 
 python3.pkgs.buildPythonApplication rec {
   pname = "pass-secret-service";
diff --git a/pkgs/applications/misc/pdf-quench/default.nix b/pkgs/applications/misc/pdf-quench/default.nix
index 907cceeb58b..4255127b3df 100644
--- a/pkgs/applications/misc/pdf-quench/default.nix
+++ b/pkgs/applications/misc/pdf-quench/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, pkgs, python3, wrapGAppsHook}:
+{ lib, fetchFromGitHub, pkgs, python3, wrapGAppsHook}:
 
 python3.pkgs.buildPythonApplication {
   pname = "pdf-quench";
diff --git a/pkgs/applications/misc/pdfarranger/default.nix b/pkgs/applications/misc/pdfarranger/default.nix
index 8c8413b2ce6..73dd9390382 100644
--- a/pkgs/applications/misc/pdfarranger/default.nix
+++ b/pkgs/applications/misc/pdfarranger/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchFromGitHub, lib
+{ fetchFromGitHub, lib
 , wrapGAppsHook, intltool
 , python3Packages, gtk3, poppler_gi
 }:
diff --git a/pkgs/applications/misc/pdfdiff/default.nix b/pkgs/applications/misc/pdfdiff/default.nix
index 31719cdfef2..5e489bebb25 100644
--- a/pkgs/applications/misc/pdfdiff/default.nix
+++ b/pkgs/applications/misc/pdfdiff/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, pythonPackages, fetchurl, xpdf }:
+{ lib, pythonPackages, fetchurl, xpdf }:
 let
   py = pythonPackages;
 in
diff --git a/pkgs/applications/misc/pgmodeler/default.nix b/pkgs/applications/misc/pgmodeler/default.nix
index 67010e713c3..0a99d357e68 100644
--- a/pkgs/applications/misc/pgmodeler/default.nix
+++ b/pkgs/applications/misc/pgmodeler/default.nix
@@ -1,5 +1,4 @@
-{ stdenv
-, lib
+{ lib
 , fetchFromGitHub
 , pkg-config
 , qmake
diff --git a/pkgs/applications/misc/pipr/default.nix b/pkgs/applications/misc/pipr/default.nix
index 7332f201689..6ca315b1092 100644
--- a/pkgs/applications/misc/pipr/default.nix
+++ b/pkgs/applications/misc/pipr/default.nix
@@ -1,9 +1,8 @@
-{ stdenv
+{ lib
 , fetchFromGitHub
 , rustPlatform
 , bubblewrap
 , makeWrapper
-, lib
 }:
 
 rustPlatform.buildRustPackage rec {
diff --git a/pkgs/applications/misc/plover/default.nix b/pkgs/applications/misc/plover/default.nix
index 2a3368e351f..05886a85bf0 100644
--- a/pkgs/applications/misc/plover/default.nix
+++ b/pkgs/applications/misc/plover/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, python27Packages, python36Packages, wmctrl,
+{ lib, fetchurl, python27Packages, python36Packages, wmctrl,
   qtbase, mkDerivationWith }:
 
 {
diff --git a/pkgs/applications/misc/prevo/default.nix b/pkgs/applications/misc/prevo/default.nix
index 92d78869503..45f5889d4d5 100644
--- a/pkgs/applications/misc/prevo/default.nix
+++ b/pkgs/applications/misc/prevo/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, symlinkJoin, prevo-tools, prevo-data, makeWrapper }:
+{ lib, symlinkJoin, prevo-tools, prevo-data, makeWrapper }:
 
 symlinkJoin rec {
   name = "prevo-${version}";
diff --git a/pkgs/applications/misc/printrun/default.nix b/pkgs/applications/misc/printrun/default.nix
index 13f9178f330..63160955130 100644
--- a/pkgs/applications/misc/printrun/default.nix
+++ b/pkgs/applications/misc/printrun/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python3Packages, fetchFromGitHub }:
+{ lib, python3Packages, fetchFromGitHub }:
 
 python3Packages.buildPythonApplication rec {
   pname = "printrun";
diff --git a/pkgs/applications/misc/pydf/default.nix b/pkgs/applications/misc/pydf/default.nix
index 0135e10d6df..afec377e9b6 100644
--- a/pkgs/applications/misc/pydf/default.nix
+++ b/pkgs/applications/misc/pydf/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python3Packages }:
+{ lib, python3Packages }:
 
 python3Packages.buildPythonPackage rec {
   pname = "pydf";
diff --git a/pkgs/applications/misc/pyditz/cerberus.nix b/pkgs/applications/misc/pyditz/cerberus.nix
index a26b6b014da..5eb43c0e357 100644
--- a/pkgs/applications/misc/pyditz/cerberus.nix
+++ b/pkgs/applications/misc/pyditz/cerberus.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, pytestrunner, pytest }:
+{ lib, buildPythonPackage, fetchPypi, pytestrunner, pytest }:
 
 buildPythonPackage rec {
   pname = "Cerberus";
diff --git a/pkgs/applications/misc/pyditz/default.nix b/pkgs/applications/misc/pyditz/default.nix
index 268d2fb2860..5765aeba7dd 100644
--- a/pkgs/applications/misc/pyditz/default.nix
+++ b/pkgs/applications/misc/pyditz/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, pythonPackages }:
+{ lib, pythonPackages }:
 
 with pythonPackages;
 
diff --git a/pkgs/applications/misc/pytrainer/default.nix b/pkgs/applications/misc/pytrainer/default.nix
index eb775a1f602..4e1e1f31f19 100644
--- a/pkgs/applications/misc/pytrainer/default.nix
+++ b/pkgs/applications/misc/pytrainer/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , fetchFromGitHub
 , perl
 , python3
diff --git a/pkgs/applications/misc/qdirstat/default.nix b/pkgs/applications/misc/qdirstat/default.nix
index a51bd3a80c0..7830f2035d9 100644
--- a/pkgs/applications/misc/qdirstat/default.nix
+++ b/pkgs/applications/misc/qdirstat/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, qmake
+{ lib, fetchFromGitHub, qmake
 , coreutils, xdg_utils, bash
 , makeWrapper, perlPackages, mkDerivation }:
 
diff --git a/pkgs/applications/misc/qlcplus/default.nix b/pkgs/applications/misc/qlcplus/default.nix
index c6306294ecd..721c95c028b 100644
--- a/pkgs/applications/misc/qlcplus/default.nix
+++ b/pkgs/applications/misc/qlcplus/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, mkDerivation, fetchFromGitHub, qmake, pkg-config, udev
+{ lib, mkDerivation, fetchFromGitHub, qmake, pkg-config, udev
 , qtmultimedia, qtscript, alsaLib, ola, libftdi1, libusb-compat-0_1
 , libsndfile, libmad
 }:
diff --git a/pkgs/applications/misc/qpdfview/default.nix b/pkgs/applications/misc/qpdfview/default.nix
index 0892632c1d8..6ae81fca27c 100644
--- a/pkgs/applications/misc/qpdfview/default.nix
+++ b/pkgs/applications/misc/qpdfview/default.nix
@@ -1,4 +1,4 @@
-{lib, stdenv, mkDerivation, fetchurl, qmake, qtbase, qtsvg, pkg-config, poppler, djvulibre, libspectre, cups
+{lib, mkDerivation, fetchurl, qmake, qtbase, qtsvg, pkg-config, poppler, djvulibre, libspectre, cups
 , file, ghostscript
 }:
 let
diff --git a/pkgs/applications/misc/qsudo/default.nix b/pkgs/applications/misc/qsudo/default.nix
index f7dbc9a9058..5f9958f2d5d 100644
--- a/pkgs/applications/misc/qsudo/default.nix
+++ b/pkgs/applications/misc/qsudo/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , mkDerivation
 , fetchFromGitHub
 , qmake
diff --git a/pkgs/applications/misc/qt-box-editor/default.nix b/pkgs/applications/misc/qt-box-editor/default.nix
index 5de2428250a..9480a32aae3 100644
--- a/pkgs/applications/misc/qt-box-editor/default.nix
+++ b/pkgs/applications/misc/qt-box-editor/default.nix
@@ -1,5 +1,5 @@
 { mkDerivation
-, lib, stdenv
+, lib
 , fetchFromGitHub
 , qtbase
 , qtsvg
diff --git a/pkgs/applications/misc/qtbitcointrader/default.nix b/pkgs/applications/misc/qtbitcointrader/default.nix
index 4ab70a5a8d7..fafd91f7811 100644
--- a/pkgs/applications/misc/qtbitcointrader/default.nix
+++ b/pkgs/applications/misc/qtbitcointrader/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchzip, qt5, mkDerivation }:
+{ lib, fetchzip, qt5, mkDerivation }:
 
 let
   version = "1.40.43";
diff --git a/pkgs/applications/misc/ranger/default.nix b/pkgs/applications/misc/ranger/default.nix
index 8394fd4c534..619b2ba9955 100644
--- a/pkgs/applications/misc/ranger/default.nix
+++ b/pkgs/applications/misc/ranger/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, fetchFromGitHub, python3Packages, file, less, highlight
+{ lib, fetchFromGitHub, python3Packages, file, less, highlight
 , imagePreviewSupport ? true, w3m ? null}:
 
 with lib;
diff --git a/pkgs/applications/misc/remarkable/remarkable-mouse/default.nix b/pkgs/applications/misc/remarkable/remarkable-mouse/default.nix
index 77538f24361..800170b314a 100644
--- a/pkgs/applications/misc/remarkable/remarkable-mouse/default.nix
+++ b/pkgs/applications/misc/remarkable/remarkable-mouse/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonApplication, fetchPypi, python3Packages }:
+{ lib, buildPythonApplication, fetchPypi, python3Packages }:
 
 buildPythonApplication rec {
   pname = "remarkable-mouse";
diff --git a/pkgs/applications/misc/remarkable/rmapi/default.nix b/pkgs/applications/misc/remarkable/rmapi/default.nix
index 22a154da4fd..e2a5f348da5 100644
--- a/pkgs/applications/misc/remarkable/rmapi/default.nix
+++ b/pkgs/applications/misc/remarkable/rmapi/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "rmapi";
diff --git a/pkgs/applications/misc/remarkable/rmview/default.nix b/pkgs/applications/misc/remarkable/rmview/default.nix
index 3148bf0ccf3..385607ec709 100644
--- a/pkgs/applications/misc/remarkable/rmview/default.nix
+++ b/pkgs/applications/misc/remarkable/rmview/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, fetchFromGitHub, python3Packages, wrapQtAppsHook }:
+{ lib, fetchFromGitHub, python3Packages, wrapQtAppsHook }:
 
 python3Packages.buildPythonApplication rec {
   pname = "rmview";
diff --git a/pkgs/applications/misc/rsclock/default.nix b/pkgs/applications/misc/rsclock/default.nix
index d7b38e2d665..bc36b2f379e 100644
--- a/pkgs/applications/misc/rsclock/default.nix
+++ b/pkgs/applications/misc/rsclock/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, rustPlatform, fetchFromGitHub }:
+{ lib, rustPlatform, fetchFromGitHub }:
 
 rustPlatform.buildRustPackage rec {
   pname = "rsClock";
diff --git a/pkgs/applications/misc/rss-bridge-cli/default.nix b/pkgs/applications/misc/rss-bridge-cli/default.nix
index 4ab79440b23..7550e6bcb95 100644
--- a/pkgs/applications/misc/rss-bridge-cli/default.nix
+++ b/pkgs/applications/misc/rss-bridge-cli/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, writeShellScriptBin, rss-bridge, php }:
+{ lib, writeShellScriptBin, rss-bridge, php }:
 
 let
   phpWithExts = (php.withExtensions
diff --git a/pkgs/applications/misc/rtv/default.nix b/pkgs/applications/misc/rtv/default.nix
index 34393696232..be539a37a30 100644
--- a/pkgs/applications/misc/rtv/default.nix
+++ b/pkgs/applications/misc/rtv/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, python3Packages }:
+{ lib, fetchFromGitHub, python3Packages }:
 
 with python3Packages;
 buildPythonApplication rec {
diff --git a/pkgs/applications/misc/snapper-gui/default.nix b/pkgs/applications/misc/snapper-gui/default.nix
index e41860551fc..5beacfad2f9 100644
--- a/pkgs/applications/misc/snapper-gui/default.nix
+++ b/pkgs/applications/misc/snapper-gui/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, python3, python3Packages
+{ lib, fetchFromGitHub, python3, python3Packages
 , gnome3, gtk3, wrapGAppsHook, gtksourceview3, snapper
 , gobject-introspection
 }:
diff --git a/pkgs/applications/misc/syncthing-tray/default.nix b/pkgs/applications/misc/syncthing-tray/default.nix
index 15ef1654e70..db734bff587 100644
--- a/pkgs/applications/misc/syncthing-tray/default.nix
+++ b/pkgs/applications/misc/syncthing-tray/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, buildGoPackage, pkg-config, libappindicator-gtk3 }:
+{ lib, fetchFromGitHub, buildGoPackage, pkg-config, libappindicator-gtk3 }:
 
 buildGoPackage rec {
   pname = "syncthing-tray";
diff --git a/pkgs/applications/misc/taskwarrior-tui/default.nix b/pkgs/applications/misc/taskwarrior-tui/default.nix
index ae730d597ce..1a97f6c0feb 100644
--- a/pkgs/applications/misc/taskwarrior-tui/default.nix
+++ b/pkgs/applications/misc/taskwarrior-tui/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , rustPlatform
 , fetchFromGitHub
 }:
diff --git a/pkgs/applications/misc/termdown/default.nix b/pkgs/applications/misc/termdown/default.nix
index d8bb03138f3..562a0f0bdcb 100644
--- a/pkgs/applications/misc/termdown/default.nix
+++ b/pkgs/applications/misc/termdown/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , fetchFromGitHub
 , buildPythonApplication
 , click
diff --git a/pkgs/applications/misc/terminal-parrot/default.nix b/pkgs/applications/misc/terminal-parrot/default.nix
index e3e64cfd68a..b44b4bd0a70 100644
--- a/pkgs/applications/misc/terminal-parrot/default.nix
+++ b/pkgs/applications/misc/terminal-parrot/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "terminal-parrot";
diff --git a/pkgs/applications/misc/termpdf.py/default.nix b/pkgs/applications/misc/termpdf.py/default.nix
index 2541a17fc20..95937ea5f2e 100644
--- a/pkgs/applications/misc/termpdf.py/default.nix
+++ b/pkgs/applications/misc/termpdf.py/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonApplication
 , fetchFromGitHub
 , fetchPypi
diff --git a/pkgs/applications/misc/tickrs/default.nix b/pkgs/applications/misc/tickrs/default.nix
index ced50748d0f..856fa60d8e6 100644
--- a/pkgs/applications/misc/tickrs/default.nix
+++ b/pkgs/applications/misc/tickrs/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, rustPlatform, fetchFromGitHub, perl }:
+{ lib, rustPlatform, fetchFromGitHub, perl }:
 
 rustPlatform.buildRustPackage rec {
   pname = "tickrs";
diff --git a/pkgs/applications/misc/tipp10/default.nix b/pkgs/applications/misc/tipp10/default.nix
index 0658b43626e..3333760a759 100644
--- a/pkgs/applications/misc/tipp10/default.nix
+++ b/pkgs/applications/misc/tipp10/default.nix
@@ -1,4 +1,4 @@
-{ cmake, lib, stdenv, mkDerivation, fetchFromGitLab,
+{ cmake, lib, mkDerivation, fetchFromGitLab,
   qtmultimedia, qttools, ... }:
 
 mkDerivation rec {
diff --git a/pkgs/applications/misc/todiff/default.nix b/pkgs/applications/misc/todiff/default.nix
index bc172c9b49f..069a63fb66b 100644
--- a/pkgs/applications/misc/todiff/default.nix
+++ b/pkgs/applications/misc/todiff/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, rustPlatform, fetchFromGitHub }:
+{ lib, rustPlatform, fetchFromGitHub }:
 
 rustPlatform.buildRustPackage rec {
   pname = "todiff";
diff --git a/pkgs/applications/misc/toot/default.nix b/pkgs/applications/misc/toot/default.nix
index d992d9cdc41..2a322b20881 100644
--- a/pkgs/applications/misc/toot/default.nix
+++ b/pkgs/applications/misc/toot/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, python3Packages }:
+{ lib, fetchFromGitHub, python3Packages }:
 
 python3Packages.buildPythonApplication rec {
   version = "0.27.0";
diff --git a/pkgs/applications/misc/topydo/default.nix b/pkgs/applications/misc/topydo/default.nix
index 4ff3090d1f8..3ea3511308b 100644
--- a/pkgs/applications/misc/topydo/default.nix
+++ b/pkgs/applications/misc/topydo/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python3Packages, fetchFromGitHub, glibcLocales }:
+{ lib, python3Packages, fetchFromGitHub, glibcLocales }:
 
 with python3Packages;
 
diff --git a/pkgs/applications/misc/tty-share/default.nix b/pkgs/applications/misc/tty-share/default.nix
index be9a0bafcc6..a402a669fbe 100644
--- a/pkgs/applications/misc/tty-share/default.nix
+++ b/pkgs/applications/misc/tty-share/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 # Upstream has a `./vendor` directory with all deps which we rely upon.
 buildGoPackage rec {
diff --git a/pkgs/applications/misc/tut/default.nix b/pkgs/applications/misc/tut/default.nix
index 1fa3e9b7883..893f901044a 100644
--- a/pkgs/applications/misc/tut/default.nix
+++ b/pkgs/applications/misc/tut/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "tut";
diff --git a/pkgs/applications/misc/tzupdate/default.nix b/pkgs/applications/misc/tzupdate/default.nix
index 3873f8d248e..f6416f0f352 100644
--- a/pkgs/applications/misc/tzupdate/default.nix
+++ b/pkgs/applications/misc/tzupdate/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python3 }:
+{ lib, python3 }:
 
 let
   inherit (python3.pkgs) buildPythonApplication fetchPypi requests;
diff --git a/pkgs/applications/misc/udiskie/default.nix b/pkgs/applications/misc/udiskie/default.nix
index e2178850da1..87c49a19a19 100644
--- a/pkgs/applications/misc/udiskie/default.nix
+++ b/pkgs/applications/misc/udiskie/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, asciidoc-full, gettext
+{ lib, fetchFromGitHub, asciidoc-full, gettext
 , gobject-introspection, gtk3, libappindicator-gtk3, libnotify, librsvg
 , udisks2, wrapGAppsHook
 , python3Packages
diff --git a/pkgs/applications/misc/ulauncher/default.nix b/pkgs/applications/misc/ulauncher/default.nix
index 8c17d264293..989649ec414 100644
--- a/pkgs/applications/misc/ulauncher/default.nix
+++ b/pkgs/applications/misc/ulauncher/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , fetchurl
 , nix-update-script
 , python3Packages
diff --git a/pkgs/applications/misc/urlscan/default.nix b/pkgs/applications/misc/urlscan/default.nix
index 3e97088371a..a56a09a8e34 100644
--- a/pkgs/applications/misc/urlscan/default.nix
+++ b/pkgs/applications/misc/urlscan/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python3Packages, fetchFromGitHub }:
+{ lib, python3Packages, fetchFromGitHub }:
 
 python3Packages.buildPythonApplication rec {
   pname = "urlscan";
diff --git a/pkgs/applications/misc/valentina/default.nix b/pkgs/applications/misc/valentina/default.nix
index 1818ed9a215..7329d8204cd 100644
--- a/pkgs/applications/misc/valentina/default.nix
+++ b/pkgs/applications/misc/valentina/default.nix
@@ -1,4 +1,4 @@
-{ mkDerivation, lib, stdenv, fetchhg
+{ mkDerivation, lib, fetchhg
 , qmake, qttools
 , qtbase, qtsvg, qtxmlpatterns
 , poppler_utils
diff --git a/pkgs/applications/misc/vym/default.nix b/pkgs/applications/misc/vym/default.nix
index b4591d8717c..9d820fc4da7 100644
--- a/pkgs/applications/misc/vym/default.nix
+++ b/pkgs/applications/misc/vym/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, mkDerivation, fetchurl, pkg-config, qmake, qtscript, qtsvg }:
+{ lib, mkDerivation, fetchurl, pkg-config, qmake, qtscript, qtsvg }:
 
 mkDerivation rec {
   pname = "vym";
diff --git a/pkgs/applications/misc/wego/default.nix b/pkgs/applications/misc/wego/default.nix
index 74c424a277b..4bbd0289a15 100644
--- a/pkgs/applications/misc/wego/default.nix
+++ b/pkgs/applications/misc/wego/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchgit }:
+{ lib, buildGoPackage, fetchgit }:
 
 buildGoPackage rec {
   pname = "wego";
diff --git a/pkgs/applications/misc/wikicurses/default.nix b/pkgs/applications/misc/wikicurses/default.nix
index e234a9007fd..ec7dff14143 100644
--- a/pkgs/applications/misc/wikicurses/default.nix
+++ b/pkgs/applications/misc/wikicurses/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, pythonPackages }:
+{ lib, fetchFromGitHub, pythonPackages }:
 
 pythonPackages.buildPythonApplication rec {
   version = "1.4";
diff --git a/pkgs/applications/misc/xdgmenumaker/default.nix b/pkgs/applications/misc/xdgmenumaker/default.nix
index c1af7ae373c..00ae2df100e 100644
--- a/pkgs/applications/misc/xdgmenumaker/default.nix
+++ b/pkgs/applications/misc/xdgmenumaker/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, txt2tags, python3Packages, glib, gobject-introspection, wrapGAppsHook }:
+{ lib, fetchFromGitHub, txt2tags, python3Packages, glib, gobject-introspection, wrapGAppsHook }:
 
 python3Packages.buildPythonApplication rec {
   pname = "xdgmenumaker";
diff --git a/pkgs/applications/misc/yokadi/default.nix b/pkgs/applications/misc/yokadi/default.nix
index ca329521142..e31a69963ff 100644
--- a/pkgs/applications/misc/yokadi/default.nix
+++ b/pkgs/applications/misc/yokadi/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, buildPythonApplication, dateutil,
+{ lib, fetchurl, buildPythonApplication, dateutil,
   sqlalchemy, setproctitle, icalendar }:
 
 buildPythonApplication rec {
diff --git a/pkgs/applications/misc/zk-shell/default.nix b/pkgs/applications/misc/zk-shell/default.nix
index 5e27f9d45b6..1dbaa842ba4 100644
--- a/pkgs/applications/misc/zk-shell/default.nix
+++ b/pkgs/applications/misc/zk-shell/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, pythonPackages }:
+{ lib, fetchFromGitHub, pythonPackages }:
 
 pythonPackages.buildPythonApplication rec {
   version = "1.0.0";
diff --git a/pkgs/applications/misc/zscroll/default.nix b/pkgs/applications/misc/zscroll/default.nix
index 748bc21ee35..3acac8b3c68 100644
--- a/pkgs/applications/misc/zscroll/default.nix
+++ b/pkgs/applications/misc/zscroll/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python3, python3Packages, fetchFromGitHub }:
+{ lib, python3, python3Packages, fetchFromGitHub }:
 
 let version = "1.0"; in
 
diff --git a/pkgs/applications/networking/brig/default.nix b/pkgs/applications/networking/brig/default.nix
index a56a586b82a..20b685a162f 100644
--- a/pkgs/applications/networking/brig/default.nix
+++ b/pkgs/applications/networking/brig/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "brig";
diff --git a/pkgs/applications/networking/browsers/browsh/default.nix b/pkgs/applications/networking/browsers/browsh/default.nix
index aa57b9a17f6..e106eb7ff66 100644
--- a/pkgs/applications/networking/browsers/browsh/default.nix
+++ b/pkgs/applications/networking/browsers/browsh/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchurl, fetchFromGitHub, go-bindata }:
+{ lib, buildGoPackage, fetchurl, fetchFromGitHub, go-bindata }:
 
 let
   version = "1.6.4";
diff --git a/pkgs/applications/networking/browsers/castor/default.nix b/pkgs/applications/networking/browsers/castor/default.nix
index 6482ce59da6..be3d8295f99 100644
--- a/pkgs/applications/networking/browsers/castor/default.nix
+++ b/pkgs/applications/networking/browsers/castor/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , fetchurl
 , rustPlatform
 , pkg-config
diff --git a/pkgs/applications/networking/browsers/chromium/browser.nix b/pkgs/applications/networking/browsers/chromium/browser.nix
index 22d21a5efa5..c4a5508b753 100644
--- a/pkgs/applications/networking/browsers/chromium/browser.nix
+++ b/pkgs/applications/networking/browsers/chromium/browser.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, mkChromiumDerivation, channel, enableWideVine, ungoogled }:
+{ lib, mkChromiumDerivation, channel, enableWideVine, ungoogled }:
 
 with lib;
 
diff --git a/pkgs/applications/networking/browsers/eolie/default.nix b/pkgs/applications/networking/browsers/eolie/default.nix
index 6b3b6351230..874a73dae8e 100644
--- a/pkgs/applications/networking/browsers/eolie/default.nix
+++ b/pkgs/applications/networking/browsers/eolie/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchgit, meson, ninja, pkg-config, nix-update-script
+{ lib, fetchgit, meson, ninja, pkg-config, nix-update-script
 , python3, gtk3, libsecret, gst_all_1, webkitgtk, glib
 , glib-networking, gtkspell3, hunspell, desktop-file-utils
 , gobject-introspection, wrapGAppsHook, gnome3 }:
diff --git a/pkgs/applications/networking/browsers/qutebrowser/default.nix b/pkgs/applications/networking/browsers/qutebrowser/default.nix
index 753ea1dc08d..35130ab3393 100644
--- a/pkgs/applications/networking/browsers/qutebrowser/default.nix
+++ b/pkgs/applications/networking/browsers/qutebrowser/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, fetchurl, fetchzip, python3
+{ lib, fetchurl, fetchzip, python3
 , mkDerivationWith, wrapQtAppsHook, wrapGAppsHook, qtbase, glib-networking
 , asciidoc, docbook_xml_dtd_45, docbook_xsl, libxml2
 , libxslt, gst_all_1 ? null
diff --git a/pkgs/applications/networking/c14/default.nix b/pkgs/applications/networking/c14/default.nix
index 572975f78d0..3a9192164ad 100644
--- a/pkgs/applications/networking/c14/default.nix
+++ b/pkgs/applications/networking/c14/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "c14-cli";
diff --git a/pkgs/applications/networking/cloudflared/default.nix b/pkgs/applications/networking/cloudflared/default.nix
index c82b297f9d6..810ea11b017 100644
--- a/pkgs/applications/networking/cloudflared/default.nix
+++ b/pkgs/applications/networking/cloudflared/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "cloudflared";
diff --git a/pkgs/applications/networking/cluster/atlantis/default.nix b/pkgs/applications/networking/cluster/atlantis/default.nix
index c6f83535106..728e23ff380 100644
--- a/pkgs/applications/networking/cluster/atlantis/default.nix
+++ b/pkgs/applications/networking/cluster/atlantis/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "atlantis";
diff --git a/pkgs/applications/networking/cluster/docker-machine/default.nix b/pkgs/applications/networking/cluster/docker-machine/default.nix
index 5a4f6b7db0e..c483125d851 100644
--- a/pkgs/applications/networking/cluster/docker-machine/default.nix
+++ b/pkgs/applications/networking/cluster/docker-machine/default.nix
@@ -1,5 +1,5 @@
 # This file was generated by go2nix.
-{ lib, stdenv, buildGoPackage, fetchFromGitHub, installShellFiles }:
+{ lib, buildGoPackage, fetchFromGitHub, installShellFiles }:
 
 buildGoPackage rec {
   pname = "machine";
diff --git a/pkgs/applications/networking/cluster/docker-machine/kvm.nix b/pkgs/applications/networking/cluster/docker-machine/kvm.nix
index c833dea21c7..4940f6331d4 100644
--- a/pkgs/applications/networking/cluster/docker-machine/kvm.nix
+++ b/pkgs/applications/networking/cluster/docker-machine/kvm.nix
@@ -1,5 +1,5 @@
 # This file was generated by go2nix.
-{ lib, stdenv, buildGoPackage, fetchFromGitHub, libvirt, pkg-config }:
+{ lib, buildGoPackage, fetchFromGitHub, libvirt, pkg-config }:
 
 buildGoPackage rec {
   pname = "docker-machine-kvm";
diff --git a/pkgs/applications/networking/cluster/fluxcd/default.nix b/pkgs/applications/networking/cluster/fluxcd/default.nix
index 1dadc0b7f08..39399a7dbcf 100644
--- a/pkgs/applications/networking/cluster/fluxcd/default.nix
+++ b/pkgs/applications/networking/cluster/fluxcd/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub, installShellFiles }:
+{ lib, buildGoModule, fetchFromGitHub, installShellFiles }:
 
 buildGoModule rec {
   pname = "fluxcd";
diff --git a/pkgs/applications/networking/cluster/fluxctl/default.nix b/pkgs/applications/networking/cluster/fluxctl/default.nix
index 896c04d6879..4a8f42e3cc7 100644
--- a/pkgs/applications/networking/cluster/fluxctl/default.nix
+++ b/pkgs/applications/networking/cluster/fluxctl/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub, installShellFiles }:
+{ lib, buildGoModule, fetchFromGitHub, installShellFiles }:
 
 buildGoModule rec {
   pname = "fluxctl";
diff --git a/pkgs/applications/networking/cluster/habitat/default.nix b/pkgs/applications/networking/cluster/habitat/default.nix
index f9b67b6821a..d9827039500 100644
--- a/pkgs/applications/networking/cluster/habitat/default.nix
+++ b/pkgs/applications/networking/cluster/habitat/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, rustPlatform, pkg-config
+{ lib, fetchFromGitHub, rustPlatform, pkg-config
 , libsodium, libarchive, openssl, zeromq }:
 
 rustPlatform.buildRustPackage rec {
diff --git a/pkgs/applications/networking/cluster/helm/default.nix b/pkgs/applications/networking/cluster/helm/default.nix
index 7d97896c360..d823e38f3f2 100644
--- a/pkgs/applications/networking/cluster/helm/default.nix
+++ b/pkgs/applications/networking/cluster/helm/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub, installShellFiles }:
+{ lib, buildGoModule, fetchFromGitHub, installShellFiles }:
 
 buildGoModule rec {
   pname = "helm";
diff --git a/pkgs/applications/networking/cluster/k9s/default.nix b/pkgs/applications/networking/cluster/k9s/default.nix
index abc23058303..11e2b0a2915 100644
--- a/pkgs/applications/networking/cluster/k9s/default.nix
+++ b/pkgs/applications/networking/cluster/k9s/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "k9s";
diff --git a/pkgs/applications/networking/cluster/kops/default.nix b/pkgs/applications/networking/cluster/kops/default.nix
index 98ffcd6fe67..9b1a155a25b 100644
--- a/pkgs/applications/networking/cluster/kops/default.nix
+++ b/pkgs/applications/networking/cluster/kops/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, buildGoPackage, fetchFromGitHub, go-bindata, installShellFiles }:
+{ lib, buildGoPackage, fetchFromGitHub, go-bindata, installShellFiles }:
 let
   goPackagePath = "k8s.io/kops";
 
diff --git a/pkgs/applications/networking/cluster/kubeless/default.nix b/pkgs/applications/networking/cluster/kubeless/default.nix
index fd7eabf1276..38323b98b19 100644
--- a/pkgs/applications/networking/cluster/kubeless/default.nix
+++ b/pkgs/applications/networking/cluster/kubeless/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub, installShellFiles }:
+{ lib, buildGoPackage, fetchFromGitHub, installShellFiles }:
 
 buildGoPackage rec {
   pname = "kubeless";
diff --git a/pkgs/applications/networking/cluster/kubelogin/default.nix b/pkgs/applications/networking/cluster/kubelogin/default.nix
index c72702fdc77..d7f829dc00e 100644
--- a/pkgs/applications/networking/cluster/kubelogin/default.nix
+++ b/pkgs/applications/networking/cluster/kubelogin/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, buildGoModule, go }:
+{ lib, fetchFromGitHub, buildGoModule, go }:
 
 buildGoModule rec {
   pname = "kubelogin";
diff --git a/pkgs/applications/networking/cluster/kubernix/default.nix b/pkgs/applications/networking/cluster/kubernix/default.nix
index 1411892b75b..88cacfea4f1 100644
--- a/pkgs/applications/networking/cluster/kubernix/default.nix
+++ b/pkgs/applications/networking/cluster/kubernix/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, rustPlatform }:
+{ lib, fetchFromGitHub, rustPlatform }:
 
 rustPlatform.buildRustPackage rec {
   pname = "kubernix";
diff --git a/pkgs/applications/networking/cluster/kubeval/default.nix b/pkgs/applications/networking/cluster/kubeval/default.nix
index d26f8ed5dc6..28b3b719997 100644
--- a/pkgs/applications/networking/cluster/kubeval/default.nix
+++ b/pkgs/applications/networking/cluster/kubeval/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, fetchFromGitHub, buildGoModule, makeWrapper }:
+{ lib, fetchFromGitHub, buildGoModule, makeWrapper }:
 
 buildGoModule rec {
   pname = "kubeval";
diff --git a/pkgs/applications/networking/cluster/linkerd/default.nix b/pkgs/applications/networking/cluster/linkerd/default.nix
index 8718da46246..11b62f479c7 100644
--- a/pkgs/applications/networking/cluster/linkerd/default.nix
+++ b/pkgs/applications/networking/cluster/linkerd/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, buildGoModule }:
+{ lib, fetchFromGitHub, buildGoModule }:
 
 buildGoModule {
   pname = "linkerd-unstable";
diff --git a/pkgs/applications/networking/cluster/openshift/default.nix b/pkgs/applications/networking/cluster/openshift/default.nix
index 09bf82e43fe..53209d2edd6 100644
--- a/pkgs/applications/networking/cluster/openshift/default.nix
+++ b/pkgs/applications/networking/cluster/openshift/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, fetchFromGitHub, buildGoPackage, which, go-bindata, rsync, util-linux
+{ lib, fetchFromGitHub, buildGoPackage, which, go-bindata, rsync, util-linux
 , coreutils, kerberos, ncurses, clang, installShellFiles
 , components ? [
   "cmd/oc"
diff --git a/pkgs/applications/networking/cluster/popeye/default.nix b/pkgs/applications/networking/cluster/popeye/default.nix
index 650532ae8b9..89802f12be5 100644
--- a/pkgs/applications/networking/cluster/popeye/default.nix
+++ b/pkgs/applications/networking/cluster/popeye/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "popeye";
diff --git a/pkgs/applications/networking/cluster/ssm-agent/default.nix b/pkgs/applications/networking/cluster/ssm-agent/default.nix
index 80c8244bee1..928fb351c6a 100644
--- a/pkgs/applications/networking/cluster/ssm-agent/default.nix
+++ b/pkgs/applications/networking/cluster/ssm-agent/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, buildGoPackage, bash, makeWrapper }:
+{ lib, fetchFromGitHub, buildGoPackage, bash, makeWrapper }:
 
 buildGoPackage rec {
   pname   = "amazon-ssm-agent";
diff --git a/pkgs/applications/networking/cluster/terraform-inventory/default.nix b/pkgs/applications/networking/cluster/terraform-inventory/default.nix
index 7b9bf354af7..085b504314e 100644
--- a/pkgs/applications/networking/cluster/terraform-inventory/default.nix
+++ b/pkgs/applications/networking/cluster/terraform-inventory/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub}:
+{ lib, buildGoPackage, fetchFromGitHub}:
 
 buildGoPackage rec {
   pname = "terraform-inventory";
diff --git a/pkgs/applications/networking/cluster/terraform-providers/ansible/default.nix b/pkgs/applications/networking/cluster/terraform-providers/ansible/default.nix
index 14d411c0239..b8e3c1540e9 100644
--- a/pkgs/applications/networking/cluster/terraform-providers/ansible/default.nix
+++ b/pkgs/applications/networking/cluster/terraform-providers/ansible/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, buildGoPackage }:
+{ lib, fetchFromGitHub, buildGoPackage }:
 buildGoPackage rec {
   pname = "terraform-provider-ansible";
   version = "1.0.3";
diff --git a/pkgs/applications/networking/cluster/terraform-providers/cloudfoundry/default.nix b/pkgs/applications/networking/cluster/terraform-providers/cloudfoundry/default.nix
index 0528bce81e3..1ee986d2030 100644
--- a/pkgs/applications/networking/cluster/terraform-providers/cloudfoundry/default.nix
+++ b/pkgs/applications/networking/cluster/terraform-providers/cloudfoundry/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "terraform-provider-cloudfoundry";
diff --git a/pkgs/applications/networking/cluster/terraform-providers/elasticsearch/default.nix b/pkgs/applications/networking/cluster/terraform-providers/elasticsearch/default.nix
index 47e4f30d009..6ae781046df 100644
--- a/pkgs/applications/networking/cluster/terraform-providers/elasticsearch/default.nix
+++ b/pkgs/applications/networking/cluster/terraform-providers/elasticsearch/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, buildGoModule }:
+{ lib, fetchFromGitHub, buildGoModule }:
 buildGoModule rec {
   pname = "terraform-provider-elasticsearch";
   version = "0.7.0";
diff --git a/pkgs/applications/networking/cluster/terraform-providers/gandi/default.nix b/pkgs/applications/networking/cluster/terraform-providers/gandi/default.nix
index fe508f4fa2e..13afa8d3818 100644
--- a/pkgs/applications/networking/cluster/terraform-providers/gandi/default.nix
+++ b/pkgs/applications/networking/cluster/terraform-providers/gandi/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, buildGoPackage }:
+{ lib, fetchFromGitHub, buildGoPackage }:
 buildGoPackage rec {
   pname = "terraform-provider-gandi";
   version = "1.0.0";
diff --git a/pkgs/applications/networking/cluster/terraform-providers/hcloud/default.nix b/pkgs/applications/networking/cluster/terraform-providers/hcloud/default.nix
index 97331e683ef..f9a84866934 100644
--- a/pkgs/applications/networking/cluster/terraform-providers/hcloud/default.nix
+++ b/pkgs/applications/networking/cluster/terraform-providers/hcloud/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "terraform-provider-hcloud";
diff --git a/pkgs/applications/networking/cluster/terraform-providers/keycloak/default.nix b/pkgs/applications/networking/cluster/terraform-providers/keycloak/default.nix
index f2244345a9c..043e081d94e 100644
--- a/pkgs/applications/networking/cluster/terraform-providers/keycloak/default.nix
+++ b/pkgs/applications/networking/cluster/terraform-providers/keycloak/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , fetchFromGitHub
 , buildGoModule
 }:
diff --git a/pkgs/applications/networking/cluster/terraform-providers/libvirt/default.nix b/pkgs/applications/networking/cluster/terraform-providers/libvirt/default.nix
index 6a1f895c053..ed2409ead9a 100644
--- a/pkgs/applications/networking/cluster/terraform-providers/libvirt/default.nix
+++ b/pkgs/applications/networking/cluster/terraform-providers/libvirt/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub, fetchpatch, libvirt, pkg-config, makeWrapper, cdrtools }:
+{ lib, buildGoPackage, fetchFromGitHub, fetchpatch, libvirt, pkg-config, makeWrapper, cdrtools }:
 
 # USAGE:
 # install the following package globally or in nix-shell:
diff --git a/pkgs/applications/networking/cluster/terraform-providers/linuxbox/default.nix b/pkgs/applications/networking/cluster/terraform-providers/linuxbox/default.nix
index f445d48eaee..4f8c44aad3f 100644
--- a/pkgs/applications/networking/cluster/terraform-providers/linuxbox/default.nix
+++ b/pkgs/applications/networking/cluster/terraform-providers/linuxbox/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "terraform-provider-linuxbox";
diff --git a/pkgs/applications/networking/cluster/terraform-providers/lxd/default.nix b/pkgs/applications/networking/cluster/terraform-providers/lxd/default.nix
index 6ccc551b4d3..23d41ce7f1f 100644
--- a/pkgs/applications/networking/cluster/terraform-providers/lxd/default.nix
+++ b/pkgs/applications/networking/cluster/terraform-providers/lxd/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "terraform-provider-lxd";
diff --git a/pkgs/applications/networking/cluster/terraform-providers/shell/default.nix b/pkgs/applications/networking/cluster/terraform-providers/shell/default.nix
index 2bf76758752..f2e9b86a646 100644
--- a/pkgs/applications/networking/cluster/terraform-providers/shell/default.nix
+++ b/pkgs/applications/networking/cluster/terraform-providers/shell/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, buildGoModule }:
+{ lib, fetchFromGitHub, buildGoModule }:
 buildGoModule rec {
   pname = "terraform-provider-shell";
   version = "1.6.0";
diff --git a/pkgs/applications/networking/cluster/terraform-providers/vercel/default.nix b/pkgs/applications/networking/cluster/terraform-providers/vercel/default.nix
index f4cfe6ba02f..f37d1ac5d87 100644
--- a/pkgs/applications/networking/cluster/terraform-providers/vercel/default.nix
+++ b/pkgs/applications/networking/cluster/terraform-providers/vercel/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "terraform-provider-vercel";
diff --git a/pkgs/applications/networking/cluster/terraform-providers/vpsadmin/default.nix b/pkgs/applications/networking/cluster/terraform-providers/vpsadmin/default.nix
index 4f56070fa51..93401dfc635 100644
--- a/pkgs/applications/networking/cluster/terraform-providers/vpsadmin/default.nix
+++ b/pkgs/applications/networking/cluster/terraform-providers/vpsadmin/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, buildGoModule }:
+{ lib, fetchFromGitHub, buildGoModule }:
 buildGoModule rec {
   pname = "terraform-provider-vpsadmin";
   version = "0.1.0";
diff --git a/pkgs/applications/networking/cluster/tilt/default.nix b/pkgs/applications/networking/cluster/tilt/default.nix
index 9f2a223c448..2a6a808b0c9 100644
--- a/pkgs/applications/networking/cluster/tilt/default.nix
+++ b/pkgs/applications/networking/cluster/tilt/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "tilt";
diff --git a/pkgs/applications/networking/cluster/velero/default.nix b/pkgs/applications/networking/cluster/velero/default.nix
index ec95b090c2e..250d6cfc1a0 100644
--- a/pkgs/applications/networking/cluster/velero/default.nix
+++ b/pkgs/applications/networking/cluster/velero/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub, installShellFiles }:
+{ lib, buildGoModule, fetchFromGitHub, installShellFiles }:
 
 buildGoModule rec {
   pname = "velero";
diff --git a/pkgs/applications/networking/datovka/default.nix b/pkgs/applications/networking/datovka/default.nix
index ca675dd7836..a48bd4ae44d 100644
--- a/pkgs/applications/networking/datovka/default.nix
+++ b/pkgs/applications/networking/datovka/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , mkDerivation
 , fetchurl
 , libxml2
diff --git a/pkgs/applications/networking/dyndns/cfdyndns/default.nix b/pkgs/applications/networking/dyndns/cfdyndns/default.nix
index 23f557a1e6d..dae9ad3bc33 100644
--- a/pkgs/applications/networking/dyndns/cfdyndns/default.nix
+++ b/pkgs/applications/networking/dyndns/cfdyndns/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, rustPlatform, pkg-config, openssl }:
+{ lib, fetchFromGitHub, rustPlatform, pkg-config, openssl }:
 
 with rustPlatform;
 
diff --git a/pkgs/applications/networking/feedreaders/canto-curses/default.nix b/pkgs/applications/networking/feedreaders/canto-curses/default.nix
index 39d9aa90596..729d12c1e5b 100644
--- a/pkgs/applications/networking/feedreaders/canto-curses/default.nix
+++ b/pkgs/applications/networking/feedreaders/canto-curses/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, python3Packages, readline, ncurses, canto-daemon }:
+{ lib, fetchFromGitHub, python3Packages, readline, ncurses, canto-daemon }:
 
 python3Packages.buildPythonApplication rec {
   version = "0.9.9";
diff --git a/pkgs/applications/networking/feedreaders/canto-daemon/default.nix b/pkgs/applications/networking/feedreaders/canto-daemon/default.nix
index a67e0c3aed2..5eb8c9d7437 100644
--- a/pkgs/applications/networking/feedreaders/canto-daemon/default.nix
+++ b/pkgs/applications/networking/feedreaders/canto-daemon/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, python3Packages, }:
+{ lib, fetchFromGitHub, python3Packages, }:
 
 python3Packages.buildPythonApplication rec {
   version = "0.9.8";
diff --git a/pkgs/applications/networking/feedreaders/feeds/default.nix b/pkgs/applications/networking/feedreaders/feeds/default.nix
index 243999553e6..8b83762089d 100644
--- a/pkgs/applications/networking/feedreaders/feeds/default.nix
+++ b/pkgs/applications/networking/feedreaders/feeds/default.nix
@@ -1,6 +1,6 @@
 { lib
 , callPackage
-, stdenv
+
 , fetchFromGitLab
 
 , appstream
diff --git a/pkgs/applications/networking/feedreaders/rawdog/default.nix b/pkgs/applications/networking/feedreaders/rawdog/default.nix
index d24e0fbf717..f840c191f90 100644
--- a/pkgs/applications/networking/feedreaders/rawdog/default.nix
+++ b/pkgs/applications/networking/feedreaders/rawdog/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, python2Packages }:
+{ lib, fetchurl, python2Packages }:
 
 python2Packages.buildPythonApplication rec {
   pname = "rawdog";
diff --git a/pkgs/applications/networking/flent/default.nix b/pkgs/applications/networking/flent/default.nix
index 5f9350b70cd..bcff9e4f8b7 100644
--- a/pkgs/applications/networking/flent/default.nix
+++ b/pkgs/applications/networking/flent/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonApplication, fetchPypi, matplotlib, procps, pyqt5, python
+{ lib, buildPythonApplication, fetchPypi, matplotlib, procps, pyqt5, python
 , pythonPackages, qt5, sphinx, xvfb_run }:
 
 buildPythonApplication rec {
diff --git a/pkgs/applications/networking/gdrive/default.nix b/pkgs/applications/networking/gdrive/default.nix
index b51512332c5..b62bda3c469 100644
--- a/pkgs/applications/networking/gdrive/default.nix
+++ b/pkgs/applications/networking/gdrive/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "gdrive";
diff --git a/pkgs/applications/networking/gns3/server.nix b/pkgs/applications/networking/gns3/server.nix
index c2ca0f580c3..62fdfd71f23 100644
--- a/pkgs/applications/networking/gns3/server.nix
+++ b/pkgs/applications/networking/gns3/server.nix
@@ -1,6 +1,6 @@
 { stable, branch, version, sha256Hash, mkOverride, commonOverrides }:
 
-{ lib, stdenv, python3, fetchFromGitHub }:
+{ lib, python3, fetchFromGitHub }:
 
 let
   defaultOverrides = commonOverrides ++ [
diff --git a/pkgs/applications/networking/instant-messengers/blink/default.nix b/pkgs/applications/networking/instant-messengers/blink/default.nix
index 9dd6754af0c..7ed3b167383 100644
--- a/pkgs/applications/networking/instant-messengers/blink/default.nix
+++ b/pkgs/applications/networking/instant-messengers/blink/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchdarcs, pythonPackages, libvncserver, zlib
+{ lib, fetchdarcs, pythonPackages, libvncserver, zlib
 , gnutls, libvpx, makeDesktopItem, mkDerivationWith }:
 
 mkDerivationWith pythonPackages.buildPythonApplication rec {
diff --git a/pkgs/applications/networking/instant-messengers/cordless/default.nix b/pkgs/applications/networking/instant-messengers/cordless/default.nix
index 5d95eddb6b6..a906c46c4ae 100644
--- a/pkgs/applications/networking/instant-messengers/cordless/default.nix
+++ b/pkgs/applications/networking/instant-messengers/cordless/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "cordless";
diff --git a/pkgs/applications/networking/instant-messengers/coyim/default.nix b/pkgs/applications/networking/instant-messengers/coyim/default.nix
index 0de7e264ec4..31896f20184 100644
--- a/pkgs/applications/networking/instant-messengers/coyim/default.nix
+++ b/pkgs/applications/networking/instant-messengers/coyim/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub, pkg-config,
+{ lib, buildGoPackage, fetchFromGitHub, pkg-config,
   cairo, gdk-pixbuf, glib, gnome3, wrapGAppsHook, gtk3 }:
 
 buildGoPackage rec {
diff --git a/pkgs/applications/networking/instant-messengers/element/element-desktop.nix b/pkgs/applications/networking/instant-messengers/element/element-desktop.nix
index fcd06326e21..274298226ec 100644
--- a/pkgs/applications/networking/instant-messengers/element/element-desktop.nix
+++ b/pkgs/applications/networking/instant-messengers/element/element-desktop.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub
+{ lib, fetchFromGitHub
 , makeWrapper, makeDesktopItem, mkYarnPackage
 , electron, element-web
 }:
diff --git a/pkgs/applications/networking/instant-messengers/ferdi/default.nix b/pkgs/applications/networking/instant-messengers/ferdi/default.nix
index 458808c832d..e4f8d3c99ee 100644
--- a/pkgs/applications/networking/instant-messengers/ferdi/default.nix
+++ b/pkgs/applications/networking/instant-messengers/ferdi/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, mkFranzDerivation, fetchurl }:
+{ lib, mkFranzDerivation, fetchurl }:
 
 mkFranzDerivation rec {
   pname = "ferdi";
diff --git a/pkgs/applications/networking/instant-messengers/franz/default.nix b/pkgs/applications/networking/instant-messengers/franz/default.nix
index a72ff17abcd..9f772bf3f6d 100644
--- a/pkgs/applications/networking/instant-messengers/franz/default.nix
+++ b/pkgs/applications/networking/instant-messengers/franz/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, mkFranzDerivation, fetchurl }:
+{ lib, mkFranzDerivation, fetchurl }:
 
 mkFranzDerivation rec {
   pname = "franz";
diff --git a/pkgs/applications/networking/instant-messengers/linphone/default.nix b/pkgs/applications/networking/instant-messengers/linphone/default.nix
index a3df74a0016..f0846fc63f7 100644
--- a/pkgs/applications/networking/instant-messengers/linphone/default.nix
+++ b/pkgs/applications/networking/instant-messengers/linphone/default.nix
@@ -45,7 +45,7 @@
 , readline
 , speex
 , sqlite
-, stdenv
+
 , udev
 , zlib
 }:
diff --git a/pkgs/applications/networking/instant-messengers/matrixcli/default.nix b/pkgs/applications/networking/instant-messengers/matrixcli/default.nix
index bca999f5762..aadb18606e1 100644
--- a/pkgs/applications/networking/instant-messengers/matrixcli/default.nix
+++ b/pkgs/applications/networking/instant-messengers/matrixcli/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchgit
+{ lib, fetchgit
   , buildPythonApplication, buildPythonPackage
   , pygobject3, pytestrunner, requests, responses, pytest, python-olm
   , canonicaljson, olm
diff --git a/pkgs/applications/networking/instant-messengers/mm/default.nix b/pkgs/applications/networking/instant-messengers/mm/default.nix
index 7229218a704..c8f24e72a9a 100644
--- a/pkgs/applications/networking/instant-messengers/mm/default.nix
+++ b/pkgs/applications/networking/instant-messengers/mm/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchgit }:
+{ lib, buildGoModule, fetchgit }:
 
 buildGoModule {
   pname = "mm";
diff --git a/pkgs/applications/networking/instant-messengers/neochat/default.nix b/pkgs/applications/networking/instant-messengers/neochat/default.nix
index bcd6fdc9f3e..cd456b336dd 100644
--- a/pkgs/applications/networking/instant-messengers/neochat/default.nix
+++ b/pkgs/applications/networking/instant-messengers/neochat/default.nix
@@ -1,5 +1,5 @@
 { mkDerivation
-, lib, stdenv
+, lib
 , fetchFromGitLab
 , pkg-config
 , cmake
diff --git a/pkgs/applications/networking/instant-messengers/pybitmessage/default.nix b/pkgs/applications/networking/instant-messengers/pybitmessage/default.nix
index 06f02fa8094..279eea2f2d7 100644
--- a/pkgs/applications/networking/instant-messengers/pybitmessage/default.nix
+++ b/pkgs/applications/networking/instant-messengers/pybitmessage/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, python2Packages, openssl }:
+{ lib, fetchFromGitHub, python2Packages, openssl }:
 
 python2Packages.buildPythonApplication rec {
   pname = "pybitmessage";
diff --git a/pkgs/applications/networking/instant-messengers/rambox/rambox.nix b/pkgs/applications/networking/instant-messengers/rambox/rambox.nix
index 6881ae270f9..56930f561c7 100644
--- a/pkgs/applications/networking/instant-messengers/rambox/rambox.nix
+++ b/pkgs/applications/networking/instant-messengers/rambox/rambox.nix
@@ -1,6 +1,6 @@
 { pname, version, src, meta, desktopName ? "Rambox" }:
 
-{ appimageTools, stdenv, lib, fetchurl, makeDesktopItem }:
+{ appimageTools, lib, fetchurl, makeDesktopItem }:
 
 let
   name = "${pname}-${version}";
diff --git a/pkgs/applications/networking/instant-messengers/ricochet/default.nix b/pkgs/applications/networking/instant-messengers/ricochet/default.nix
index 2a234edaa08..97d8d39f656 100644
--- a/pkgs/applications/networking/instant-messengers/ricochet/default.nix
+++ b/pkgs/applications/networking/instant-messengers/ricochet/default.nix
@@ -1,4 +1,4 @@
-{ mkDerivation, lib, stdenv, fetchurl, pkg-config, makeDesktopItem
+{ mkDerivation, lib, fetchurl, pkg-config, makeDesktopItem
 , qtbase, qttools, qtmultimedia, qtquick1, qtquickcontrols
 , openssl, protobuf, qmake
 }:
diff --git a/pkgs/applications/networking/instant-messengers/scudcloud/default.nix b/pkgs/applications/networking/instant-messengers/scudcloud/default.nix
index 55935f69e1c..29d4c3600c3 100644
--- a/pkgs/applications/networking/instant-messengers/scudcloud/default.nix
+++ b/pkgs/applications/networking/instant-messengers/scudcloud/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, python3Packages }:
+{ lib, fetchurl, python3Packages }:
 
 let version = "1.63";
 in python3Packages.buildPythonPackage {
diff --git a/pkgs/applications/networking/instant-messengers/slack-term/default.nix b/pkgs/applications/networking/instant-messengers/slack-term/default.nix
index 66d59346c4b..30cc7396c56 100644
--- a/pkgs/applications/networking/instant-messengers/slack-term/default.nix
+++ b/pkgs/applications/networking/instant-messengers/slack-term/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   # https://github.com/erroneousboat/slack-term
diff --git a/pkgs/applications/networking/instant-messengers/swift-im/default.nix b/pkgs/applications/networking/instant-messengers/swift-im/default.nix
index 1dadc728eee..58335bed421 100644
--- a/pkgs/applications/networking/instant-messengers/swift-im/default.nix
+++ b/pkgs/applications/networking/instant-messengers/swift-im/default.nix
@@ -1,4 +1,4 @@
-{ mkDerivation, lib, stdenv, fetchurl, pkg-config, qttools, sconsPackages
+{ mkDerivation, lib, fetchurl, pkg-config, qttools, sconsPackages
 , GConf, avahi, boost, hunspell, libXScrnSaver, libedit, libidn, libnatpmp, libxml2
 , lua, miniupnpc, openssl, qtbase, qtmultimedia, qtsvg, qtwebkit, qtx11extras, zlib
 }:
diff --git a/pkgs/applications/networking/instant-messengers/tensor/default.nix b/pkgs/applications/networking/instant-messengers/tensor/default.nix
index 93b3315c1ef..114b3ab8f4d 100644
--- a/pkgs/applications/networking/instant-messengers/tensor/default.nix
+++ b/pkgs/applications/networking/instant-messengers/tensor/default.nix
@@ -1,4 +1,4 @@
-{ mkDerivation, lib, stdenv, fetchgit, qtbase, qtquickcontrols, qmake, makeDesktopItem }:
+{ mkDerivation, lib, fetchgit, qtbase, qtquickcontrols, qmake, makeDesktopItem }:
 
 # we now have libqmatrixclient so a future version of tensor that supports it
 # should use that
diff --git a/pkgs/applications/networking/instant-messengers/turses/default.nix b/pkgs/applications/networking/instant-messengers/turses/default.nix
index 4c49f41f623..256e026a060 100644
--- a/pkgs/applications/networking/instant-messengers/turses/default.nix
+++ b/pkgs/applications/networking/instant-messengers/turses/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchpatch, python3Packages }:
+{ lib, fetchpatch, python3Packages }:
 
 with lib;
 with python3Packages;
diff --git a/pkgs/applications/networking/instant-messengers/twinkle/default.nix b/pkgs/applications/networking/instant-messengers/twinkle/default.nix
index 004a4dab823..8b306c07506 100644
--- a/pkgs/applications/networking/instant-messengers/twinkle/default.nix
+++ b/pkgs/applications/networking/instant-messengers/twinkle/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , fetchFromGitHub
 , cmake
 , libxml2
diff --git a/pkgs/applications/networking/instant-messengers/xmpp-client/default.nix b/pkgs/applications/networking/instant-messengers/xmpp-client/default.nix
index fb1f5a0a69c..4367230f775 100644
--- a/pkgs/applications/networking/instant-messengers/xmpp-client/default.nix
+++ b/pkgs/applications/networking/instant-messengers/xmpp-client/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "xmpp-client";
diff --git a/pkgs/applications/networking/ipfs-cluster/default.nix b/pkgs/applications/networking/ipfs-cluster/default.nix
index dcb25c73657..67d45c44868 100644
--- a/pkgs/applications/networking/ipfs-cluster/default.nix
+++ b/pkgs/applications/networking/ipfs-cluster/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "ipfs-cluster";
diff --git a/pkgs/applications/networking/ipfs/default.nix b/pkgs/applications/networking/ipfs/default.nix
index fd9d8bd0d34..c54b4428819 100644
--- a/pkgs/applications/networking/ipfs/default.nix
+++ b/pkgs/applications/networking/ipfs/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchurl, nixosTests }:
+{ lib, buildGoModule, fetchurl, nixosTests }:
 
 buildGoModule rec {
   pname = "ipfs";
diff --git a/pkgs/applications/networking/ipget/default.nix b/pkgs/applications/networking/ipget/default.nix
index ded83f30a1a..8817d90dd6e 100644
--- a/pkgs/applications/networking/ipget/default.nix
+++ b/pkgs/applications/networking/ipget/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "ipget";
diff --git a/pkgs/applications/networking/irc/qweechat/default.nix b/pkgs/applications/networking/irc/qweechat/default.nix
index 18a4872a44f..c4a67c8098a 100644
--- a/pkgs/applications/networking/irc/qweechat/default.nix
+++ b/pkgs/applications/networking/irc/qweechat/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, python27Packages }:
+{ lib, fetchFromGitHub, python27Packages }:
 
 python27Packages.buildPythonApplication rec {
   version = "2016-07-29";
diff --git a/pkgs/applications/networking/irc/weechat/scripts/weechat-matrix/default.nix b/pkgs/applications/networking/irc/weechat/scripts/weechat-matrix/default.nix
index b77d9c984de..07e4dd54e5e 100644
--- a/pkgs/applications/networking/irc/weechat/scripts/weechat-matrix/default.nix
+++ b/pkgs/applications/networking/irc/weechat/scripts/weechat-matrix/default.nix
@@ -1,5 +1,5 @@
 { buildPythonPackage
-, lib, stdenv
+, lib
 , python
 , fetchFromGitHub
 , pyopenssl
diff --git a/pkgs/applications/networking/lieer/default.nix b/pkgs/applications/networking/lieer/default.nix
index aee21dca645..3ad2762a2cf 100644
--- a/pkgs/applications/networking/lieer/default.nix
+++ b/pkgs/applications/networking/lieer/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, python3Packages }:
+{ lib, fetchFromGitHub, python3Packages }:
 
 python3Packages.buildPythonApplication rec {
   pname = "lieer";
diff --git a/pkgs/applications/networking/maestral-qt/default.nix b/pkgs/applications/networking/maestral-qt/default.nix
index dbcae7a0ec3..b568775481c 100644
--- a/pkgs/applications/networking/maestral-qt/default.nix
+++ b/pkgs/applications/networking/maestral-qt/default.nix
@@ -1,5 +1,4 @@
-{ stdenv
-, lib
+{ lib
 , fetchFromGitHub
 , python3
 , wrapQtAppsHook
diff --git a/pkgs/applications/networking/mailreaders/aerc/default.nix b/pkgs/applications/networking/mailreaders/aerc/default.nix
index b01ec9ef2cd..b43e6bb093c 100644
--- a/pkgs/applications/networking/mailreaders/aerc/default.nix
+++ b/pkgs/applications/networking/mailreaders/aerc/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchurl
+{ lib, buildGoModule, fetchurl
 , go, ncurses, notmuch, scdoc
 , python3, perl, w3m, dante
 , fetchFromGitHub
diff --git a/pkgs/applications/networking/mailreaders/afew/default.nix b/pkgs/applications/networking/mailreaders/afew/default.nix
index dbc55850f9f..8a5f607dd32 100644
--- a/pkgs/applications/networking/mailreaders/afew/default.nix
+++ b/pkgs/applications/networking/mailreaders/afew/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python3Packages, notmuch }:
+{ lib, python3Packages, notmuch }:
 
 python3Packages.buildPythonApplication rec {
   pname = "afew";
diff --git a/pkgs/applications/networking/mailreaders/mailpile/default.nix b/pkgs/applications/networking/mailreaders/mailpile/default.nix
index 2cb1fd56ecc..1d1dc030c31 100644
--- a/pkgs/applications/networking/mailreaders/mailpile/default.nix
+++ b/pkgs/applications/networking/mailreaders/mailpile/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, python2Packages, gnupg1orig, openssl, git }:
+{ lib, fetchFromGitHub, python2Packages, gnupg1orig, openssl, git }:
 
 python2Packages.buildPythonApplication rec {
   pname = "mailpile";
diff --git a/pkgs/applications/networking/mailreaders/meli/default.nix b/pkgs/applications/networking/mailreaders/meli/default.nix
index 2ced5e60db4..ec50e913176 100644
--- a/pkgs/applications/networking/mailreaders/meli/default.nix
+++ b/pkgs/applications/networking/mailreaders/meli/default.nix
@@ -1,5 +1,4 @@
-{ stdenv
-, lib
+{ lib
 , fetchgit
 , rustPlatform
 , pkg-config
diff --git a/pkgs/applications/networking/mailreaders/mlarchive2maildir/default.nix b/pkgs/applications/networking/mailreaders/mlarchive2maildir/default.nix
index ea10bf89248..6cd0b3db786 100644
--- a/pkgs/applications/networking/mailreaders/mlarchive2maildir/default.nix
+++ b/pkgs/applications/networking/mailreaders/mlarchive2maildir/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python3, notmuch }:
+{ lib, python3, notmuch }:
 
 python3.pkgs.buildPythonApplication rec {
   pname = "mlarchive2maildir";
diff --git a/pkgs/applications/networking/owncloud-client/default.nix b/pkgs/applications/networking/owncloud-client/default.nix
index 452acc1c7ca..761d0e6b244 100644
--- a/pkgs/applications/networking/owncloud-client/default.nix
+++ b/pkgs/applications/networking/owncloud-client/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, mkDerivation, cmake, pkg-config, qtbase, qtkeychain, sqlite, libsecret }:
+{ lib, fetchurl, mkDerivation, cmake, pkg-config, qtbase, qtkeychain, sqlite, libsecret }:
 
 mkDerivation rec {
   pname = "owncloud-client";
diff --git a/pkgs/applications/networking/p2p/deluge/default.nix b/pkgs/applications/networking/p2p/deluge/default.nix
index 068776fe17a..4587da48a4a 100644
--- a/pkgs/applications/networking/p2p/deluge/default.nix
+++ b/pkgs/applications/networking/p2p/deluge/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, intltool, libtorrent-rasterbar, pythonPackages
+{ lib, fetchurl, intltool, libtorrent-rasterbar, pythonPackages
 , gtk3, glib, gobject-introspection, librsvg, wrapGAppsHook }:
 
 pythonPackages.buildPythonPackage rec {
diff --git a/pkgs/applications/networking/p2p/zeronet/default.nix b/pkgs/applications/networking/p2p/zeronet/default.nix
index 7deddf8578b..4440b24a2b1 100644
--- a/pkgs/applications/networking/p2p/zeronet/default.nix
+++ b/pkgs/applications/networking/p2p/zeronet/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, python3Packages }:
+{ lib, fetchFromGitHub, python3Packages }:
 
 python3Packages.buildPythonApplication rec {
   pname = "zeronet";
diff --git a/pkgs/applications/networking/protocol/default.nix b/pkgs/applications/networking/protocol/default.nix
index 70723f48646..6690a75485b 100644
--- a/pkgs/applications/networking/protocol/default.nix
+++ b/pkgs/applications/networking/protocol/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonApplication, fetchFromGitHub }:
+{ lib, buildPythonApplication, fetchFromGitHub }:
 
 buildPythonApplication {
   pname = "protocol-unstable";
diff --git a/pkgs/applications/networking/pyload/default.nix b/pkgs/applications/networking/pyload/default.nix
index dcfa88d9d4c..f70359cf7ac 100644
--- a/pkgs/applications/networking/pyload/default.nix
+++ b/pkgs/applications/networking/pyload/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, fetchpatch, pythonPackages, gocr, unrar, rhino, spidermonkey_38 }:
+{ lib, fetchFromGitHub, fetchpatch, pythonPackages, gocr, unrar, rhino, spidermonkey_38 }:
 
 let
   beautifulsoup = pythonPackages.callPackage ./beautifulsoup.nix {
diff --git a/pkgs/applications/networking/qv2ray/default.nix b/pkgs/applications/networking/qv2ray/default.nix
index 7c3c23a89ee..7b97bd8543d 100644
--- a/pkgs/applications/networking/qv2ray/default.nix
+++ b/pkgs/applications/networking/qv2ray/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , mkDerivation
 , fetchFromGitHub
 , qmake
diff --git a/pkgs/applications/networking/remote/x2goclient/default.nix b/pkgs/applications/networking/remote/x2goclient/default.nix
index 7441cdf4eef..4156c82f91b 100644
--- a/pkgs/applications/networking/remote/x2goclient/default.nix
+++ b/pkgs/applications/networking/remote/x2goclient/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchgit, cups, libssh, libXpm, nx-libs, openldap, openssh
+{ lib, fetchgit, cups, libssh, libXpm, nx-libs, openldap, openssh
 , mkDerivation, qtbase, qtsvg, qtx11extras, qttools, phonon, pkg-config }:
 
 mkDerivation {
diff --git a/pkgs/applications/networking/shellhub-agent/default.nix b/pkgs/applications/networking/shellhub-agent/default.nix
index db9e112a063..f66df96e9db 100644
--- a/pkgs/applications/networking/shellhub-agent/default.nix
+++ b/pkgs/applications/networking/shellhub-agent/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildGoModule
 , fetchFromGitHub
 , genericUpdater
diff --git a/pkgs/applications/networking/soulseek/nicotine-plus/default.nix b/pkgs/applications/networking/soulseek/nicotine-plus/default.nix
index 7cfe9ddfc97..045120813f0 100644
--- a/pkgs/applications/networking/soulseek/nicotine-plus/default.nix
+++ b/pkgs/applications/networking/soulseek/nicotine-plus/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, python27Packages, geoip }:
+{ lib, fetchFromGitHub, python27Packages, geoip }:
 
 with lib;
 
diff --git a/pkgs/applications/networking/sync/acd_cli/default.nix b/pkgs/applications/networking/sync/acd_cli/default.nix
index 2f83873fbf8..49fc578377c 100644
--- a/pkgs/applications/networking/sync/acd_cli/default.nix
+++ b/pkgs/applications/networking/sync/acd_cli/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, buildPythonApplication, fuse
+{ lib, fetchFromGitHub, buildPythonApplication, fuse
 , appdirs, colorama, dateutil, requests, requests_toolbelt
 , fusepy, sqlalchemy }:
 
diff --git a/pkgs/applications/networking/sync/desync/default.nix b/pkgs/applications/networking/sync/desync/default.nix
index 689a2b3fdda..bc2776657c2 100644
--- a/pkgs/applications/networking/sync/desync/default.nix
+++ b/pkgs/applications/networking/sync/desync/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "desync";
diff --git a/pkgs/applications/networking/syncthing-gtk/default.nix b/pkgs/applications/networking/syncthing-gtk/default.nix
index a7f9c5f9f4b..015033d6ca5 100644
--- a/pkgs/applications/networking/syncthing-gtk/default.nix
+++ b/pkgs/applications/networking/syncthing-gtk/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, fetchpatch, libnotify, librsvg, killall
+{ lib, fetchFromGitHub, fetchpatch, libnotify, librsvg, killall
 , gtk3, libappindicator-gtk3, substituteAll, syncthing, wrapGAppsHook
 , gnome3, buildPythonApplication, dateutil, pyinotify, pygobject3
 , bcrypt, gobject-introspection, gsettings-desktop-schemas
diff --git a/pkgs/applications/networking/twtxt/default.nix b/pkgs/applications/networking/twtxt/default.nix
index 98877880255..ff6e61c614f 100644
--- a/pkgs/applications/networking/twtxt/default.nix
+++ b/pkgs/applications/networking/twtxt/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, fetchFromGitHub, buildGoModule }:
+{ lib, fetchFromGitHub, buildGoModule }:
 
 buildGoModule rec {
   pname = "twtxt";
diff --git a/pkgs/applications/networking/versus/default.nix b/pkgs/applications/networking/versus/default.nix
index 5e1b1e873c9..1e3dd211326 100644
--- a/pkgs/applications/networking/versus/default.nix
+++ b/pkgs/applications/networking/versus/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "versus";
diff --git a/pkgs/applications/office/beamerpresenter/default.nix b/pkgs/applications/office/beamerpresenter/default.nix
index c07b4c5e1aa..4e8bcaee019 100644
--- a/pkgs/applications/office/beamerpresenter/default.nix
+++ b/pkgs/applications/office/beamerpresenter/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, mkDerivation, fetchFromGitHub, installShellFiles,
+{ lib, mkDerivation, fetchFromGitHub, installShellFiles,
   qmake, qtbase, poppler, qtmultimedia }:
 
 mkDerivation rec {
diff --git a/pkgs/applications/office/espanso/default.nix b/pkgs/applications/office/espanso/default.nix
index 808811e20e8..d20e19c6859 100644
--- a/pkgs/applications/office/espanso/default.nix
+++ b/pkgs/applications/office/espanso/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , fetchFromGitHub
 , rustPlatform
 , pkg-config
diff --git a/pkgs/applications/office/fava/default.nix b/pkgs/applications/office/fava/default.nix
index fd5f3b8d7c5..b070683e6f2 100644
--- a/pkgs/applications/office/fava/default.nix
+++ b/pkgs/applications/office/fava/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python3, beancount }:
+{ lib, python3, beancount }:
 
 let
   inherit (python3.pkgs) buildPythonApplication fetchPypi;
diff --git a/pkgs/applications/office/gtg/default.nix b/pkgs/applications/office/gtg/default.nix
index 52558df5da8..4c892b2605b 100644
--- a/pkgs/applications/office/gtg/default.nix
+++ b/pkgs/applications/office/gtg/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , fetchFromGitHub
 , meson
 , python3Packages
diff --git a/pkgs/applications/office/keepnote/default.nix b/pkgs/applications/office/keepnote/default.nix
index 30b4d5fa690..14f48da2230 100644
--- a/pkgs/applications/office/keepnote/default.nix
+++ b/pkgs/applications/office/keepnote/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, python2Packages }:
+{ lib, fetchurl, python2Packages }:
 
 python2Packages.buildPythonApplication {
   name = "keepnote-0.7.8";
diff --git a/pkgs/applications/office/ledger-autosync/default.nix b/pkgs/applications/office/ledger-autosync/default.nix
index 81e49e6e0aa..90e5995669e 100644
--- a/pkgs/applications/office/ledger-autosync/default.nix
+++ b/pkgs/applications/office/ledger-autosync/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python3Packages, fetchFromGitHub, ledger, hledger, useLedger ? true, useHledger ? true }:
+{ lib, python3Packages, fetchFromGitHub, ledger, hledger, useLedger ? true, useHledger ? true }:
 
 python3Packages.buildPythonApplication rec {
   pname = "ledger-autosync";
diff --git a/pkgs/applications/office/libreoffice/src-fresh/override.nix b/pkgs/applications/office/libreoffice/src-fresh/override.nix
index 8586fa1f673..0141b74c389 100644
--- a/pkgs/applications/office/libreoffice/src-fresh/override.nix
+++ b/pkgs/applications/office/libreoffice/src-fresh/override.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, kdeIntegration, ... }:
+{ lib, kdeIntegration, ... }:
 attrs:
 {
   postConfigure = attrs.postConfigure + ''
diff --git a/pkgs/applications/office/libreoffice/src-still/override.nix b/pkgs/applications/office/libreoffice/src-still/override.nix
index 119b5a645d6..50812d0efb9 100644
--- a/pkgs/applications/office/libreoffice/src-still/override.nix
+++ b/pkgs/applications/office/libreoffice/src-still/override.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, kdeIntegration, fetchpatch, ... }:
+{ lib, kdeIntegration, fetchpatch, ... }:
 attrs:
 {
   patches = attrs.patches or [ ] ++ [
diff --git a/pkgs/applications/office/mytetra/default.nix b/pkgs/applications/office/mytetra/default.nix
index f48ec3fb237..384d7fadaf0 100644
--- a/pkgs/applications/office/mytetra/default.nix
+++ b/pkgs/applications/office/mytetra/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, mkDerivation, fetchurl, qmake, qtsvg, makeWrapper, xdg_utils }:
+{ lib, mkDerivation, fetchurl, qmake, qtsvg, makeWrapper, xdg_utils }:
 
 let
   version = "1.44.55";
diff --git a/pkgs/applications/office/qnotero/default.nix b/pkgs/applications/office/qnotero/default.nix
index 6ffdd5fefed..4459e42356a 100644
--- a/pkgs/applications/office/qnotero/default.nix
+++ b/pkgs/applications/office/qnotero/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, python3Packages, wrapQtAppsHook }:
+{ lib, fetchFromGitHub, python3Packages, wrapQtAppsHook }:
 
 python3Packages.buildPythonPackage rec {
   pname = "qnotero";
diff --git a/pkgs/applications/office/scribus/unstable.nix b/pkgs/applications/office/scribus/unstable.nix
index 7f4054bfb4e..acf44880452 100644
--- a/pkgs/applications/office/scribus/unstable.nix
+++ b/pkgs/applications/office/scribus/unstable.nix
@@ -22,7 +22,7 @@
 , qtbase
 , qtimageformats
 , qttools
-, lib, stdenv
+, lib
 }:
 
 let
diff --git a/pkgs/applications/office/skanlite/default.nix b/pkgs/applications/office/skanlite/default.nix
index 7436054715d..89cf2add212 100644
--- a/pkgs/applications/office/skanlite/default.nix
+++ b/pkgs/applications/office/skanlite/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, mkDerivation, fetchurl, cmake, extra-cmake-modules, qtbase,
+{ lib, mkDerivation, fetchurl, cmake, extra-cmake-modules, qtbase,
   kcoreaddons, kdoctools, ki18n, kio, kxmlgui, ktextwidgets,
   libksane
 }:
diff --git a/pkgs/applications/office/timeular/default.nix b/pkgs/applications/office/timeular/default.nix
index 63f86171dce..6c1068d4584 100644
--- a/pkgs/applications/office/timeular/default.nix
+++ b/pkgs/applications/office/timeular/default.nix
@@ -1,5 +1,5 @@
 {
-  lib, stdenv,
+  lib,
   fetchurl,
   appimageTools,
   libsecret
diff --git a/pkgs/applications/office/todoman/default.nix b/pkgs/applications/office/todoman/default.nix
index dc788a6f195..4011879ddb8 100644
--- a/pkgs/applications/office/todoman/default.nix
+++ b/pkgs/applications/office/todoman/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , python3
 , glibcLocales
 , installShellFiles
diff --git a/pkgs/applications/office/tryton/default.nix b/pkgs/applications/office/tryton/default.nix
index 6b49a27a08a..65eb48f3b2d 100644
--- a/pkgs/applications/office/tryton/default.nix
+++ b/pkgs/applications/office/tryton/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , python3Packages
 , pkg-config
 , librsvg
diff --git a/pkgs/applications/office/watson/default.nix b/pkgs/applications/office/watson/default.nix
index 30992e60a6f..18c1b9469e7 100644
--- a/pkgs/applications/office/watson/default.nix
+++ b/pkgs/applications/office/watson/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, pythonPackages, installShellFiles }:
+{ lib, fetchFromGitHub, pythonPackages, installShellFiles }:
 
 with pythonPackages;
 
diff --git a/pkgs/applications/radio/chirp/default.nix b/pkgs/applications/radio/chirp/default.nix
index 6b84e47909d..e9b446dc584 100644
--- a/pkgs/applications/radio/chirp/default.nix
+++ b/pkgs/applications/radio/chirp/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , fetchurl
 , python2
 }:
diff --git a/pkgs/applications/radio/gqrx/default.nix b/pkgs/applications/radio/gqrx/default.nix
index 8a612309909..217818f67c2 100644
--- a/pkgs/applications/radio/gqrx/default.nix
+++ b/pkgs/applications/radio/gqrx/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, cmake, qtbase, qtsvg, gnuradio, boost, gr-osmosdr
+{ lib, fetchFromGitHub, cmake, qtbase, qtsvg, gnuradio, boost, gr-osmosdr
 , mkDerivation
 # drivers (optional):
 , rtl-sdr, hackrf
diff --git a/pkgs/applications/radio/qsstv/default.nix b/pkgs/applications/radio/qsstv/default.nix
index d92cf9e25cd..e6fa95b5dc7 100644
--- a/pkgs/applications/radio/qsstv/default.nix
+++ b/pkgs/applications/radio/qsstv/default.nix
@@ -1,4 +1,4 @@
-{ mkDerivation, lib, stdenv, fetchurl, qtbase, qmake, openjpeg, pkg-config, fftw,
+{ mkDerivation, lib, fetchurl, qtbase, qmake, openjpeg, pkg-config, fftw,
   libpulseaudio, alsaLib, hamlib, libv4l, fftwFloat }:
 
 mkDerivation rec {
diff --git a/pkgs/applications/radio/quisk/default.nix b/pkgs/applications/radio/quisk/default.nix
index c0dab8773c7..19a4e715013 100644
--- a/pkgs/applications/radio/quisk/default.nix
+++ b/pkgs/applications/radio/quisk/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python38Packages, fetchPypi
+{ lib, python38Packages, fetchPypi
 , fftw, alsaLib, pulseaudio, wxPython_4_0 }:
 
 python38Packages.buildPythonApplication rec {
diff --git a/pkgs/applications/radio/urh/default.nix b/pkgs/applications/radio/urh/default.nix
index 3a51f77d7bd..00d3431b6e3 100644
--- a/pkgs/applications/radio/urh/default.nix
+++ b/pkgs/applications/radio/urh/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, fetchFromGitHub, python3Packages
+{ lib, fetchFromGitHub, python3Packages
 , hackrf, rtl-sdr, airspy, limesuite, libiio
 , qt5
 , USRPSupport ? false, uhd }:
diff --git a/pkgs/applications/science/biology/eggnog-mapper/default.nix b/pkgs/applications/science/biology/eggnog-mapper/default.nix
index c6defb245c7..7eb3afd437a 100644
--- a/pkgs/applications/science/biology/eggnog-mapper/default.nix
+++ b/pkgs/applications/science/biology/eggnog-mapper/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, fetchpatch, makeWrapper, python27Packages, wget, diamond, hmmer }:
+{ lib, fetchFromGitHub, fetchpatch, makeWrapper, python27Packages, wget, diamond, hmmer }:
 
 python27Packages.buildPythonApplication rec {
   pname = "eggnog-mapper";
diff --git a/pkgs/applications/science/biology/obitools/obitools3.nix b/pkgs/applications/science/biology/obitools/obitools3.nix
index 55a9612c62d..082a779e12b 100644
--- a/pkgs/applications/science/biology/obitools/obitools3.nix
+++ b/pkgs/applications/science/biology/obitools/obitools3.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, python3Packages, cmake, python3 }:
+{ lib, fetchurl, python3Packages, cmake, python3 }:
 
 let
   pythonPackages = python3Packages;
diff --git a/pkgs/applications/science/biology/poretools/default.nix b/pkgs/applications/science/biology/poretools/default.nix
index 454843e2f32..b2cefefb5cb 100755
--- a/pkgs/applications/science/biology/poretools/default.nix
+++ b/pkgs/applications/science/biology/poretools/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, pythonPackages, fetchFromGitHub }:
+{ lib, pythonPackages, fetchFromGitHub }:
 
 pythonPackages.buildPythonPackage rec {
   pname = "poretools";
diff --git a/pkgs/applications/science/biology/tebreak/default.nix b/pkgs/applications/science/biology/tebreak/default.nix
index b70ac29e38f..cb606a6b346 100644
--- a/pkgs/applications/science/biology/tebreak/default.nix
+++ b/pkgs/applications/science/biology/tebreak/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, last, exonerate, minia, python3Packages, bwa
+{ lib, fetchFromGitHub, last, exonerate, minia, python3Packages, bwa
 , samtools, findutils, python }:
 
 python3Packages.buildPythonApplication rec {
diff --git a/pkgs/applications/science/chemistry/d-seams/default.nix b/pkgs/applications/science/chemistry/d-seams/default.nix
index cbe73bb7edc..f5e21db4b55 100644
--- a/pkgs/applications/science/chemistry/d-seams/default.nix
+++ b/pkgs/applications/science/chemistry/d-seams/default.nix
@@ -1,4 +1,4 @@
-{ clangStdenv, stdenv, fetchFromGitHub, catch2, rang, fmt, libyamlcpp, cmake
+{ clangStdenv, fetchFromGitHub, catch2, rang, fmt, libyamlcpp, cmake
 , eigen, lua, luaPackages, liblapack, blas, lib, boost, gsl }:
 
 clangStdenv.mkDerivation rec {
diff --git a/pkgs/applications/science/chemistry/pymol/default.nix b/pkgs/applications/science/chemistry/pymol/default.nix
index 47498690122..2df8b0e6d47 100644
--- a/pkgs/applications/science/chemistry/pymol/default.nix
+++ b/pkgs/applications/science/chemistry/pymol/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, fetchFromGitHub, makeDesktopItem
+{ lib, fetchurl, fetchFromGitHub, makeDesktopItem
 , python3, python3Packages
 , glew, glm, freeglut, libpng, libxml2, tk, freetype, msgpack }:
 
diff --git a/pkgs/applications/science/electronics/caneda/default.nix b/pkgs/applications/science/electronics/caneda/default.nix
index 14c654bd697..6a9a491af1e 100644
--- a/pkgs/applications/science/electronics/caneda/default.nix
+++ b/pkgs/applications/science/electronics/caneda/default.nix
@@ -1,4 +1,4 @@
-{ mkDerivation, lib, stdenv, fetchFromGitHub, cmake, qtbase, qttools, qtsvg, qwt }:
+{ mkDerivation, lib, fetchFromGitHub, cmake, qtbase, qttools, qtsvg, qwt }:
 
 mkDerivation rec {
   pname = "caneda";
diff --git a/pkgs/applications/science/electronics/fritzing/default.nix b/pkgs/applications/science/electronics/fritzing/default.nix
index b25f76800e8..79c01d3ec71 100644
--- a/pkgs/applications/science/electronics/fritzing/default.nix
+++ b/pkgs/applications/science/electronics/fritzing/default.nix
@@ -1,4 +1,4 @@
-{ mkDerivation, lib, stdenv, fetchpatch, fetchFromGitHub, qmake, pkg-config
+{ mkDerivation, lib, fetchpatch, fetchFromGitHub, qmake, pkg-config
 , qtbase, qtsvg, qttools, qtserialport, boost, libgit2
 }:
 
diff --git a/pkgs/applications/science/logic/petrinizer/default.nix b/pkgs/applications/science/logic/petrinizer/default.nix
index 5118795978d..38039f61fda 100644
--- a/pkgs/applications/science/logic/petrinizer/default.nix
+++ b/pkgs/applications/science/logic/petrinizer/default.nix
@@ -1,6 +1,6 @@
 { mkDerivation, callPackage, buildPackages
 , async, base, bytestring, containers, fetchFromGitLab, mtl
-, parallel-io, parsec, lib, stdenv, stm, transformers
+, parallel-io, parsec, lib, stm, transformers
 }:
 let
   z3 = callPackage ./z3.nix { gomp = null; z3 = buildPackages.z3; };
diff --git a/pkgs/applications/science/logic/petrinizer/sbv-7.13.nix b/pkgs/applications/science/logic/petrinizer/sbv-7.13.nix
index 96e216417df..f0c8dd24904 100644
--- a/pkgs/applications/science/logic/petrinizer/sbv-7.13.nix
+++ b/pkgs/applications/science/logic/petrinizer/sbv-7.13.nix
@@ -1,7 +1,7 @@
 { mkDerivation, array, async, base, bytestring, containers
 , crackNum, deepseq, directory, doctest, filepath, generic-deriving
 , ghc, Glob, hlint, mtl, pretty, process, QuickCheck, random
-, lib, stdenv, syb, tasty, tasty-golden, tasty-hunit, tasty-quickcheck
+, lib, syb, tasty, tasty-golden, tasty-hunit, tasty-quickcheck
 , template-haskell, time, z3
 }:
 mkDerivation {
diff --git a/pkgs/applications/science/logic/petrinizer/z3.nix b/pkgs/applications/science/logic/petrinizer/z3.nix
index 3574954c376..a20ccea16dc 100644
--- a/pkgs/applications/science/logic/petrinizer/z3.nix
+++ b/pkgs/applications/science/logic/petrinizer/z3.nix
@@ -1,5 +1,5 @@
 { mkDerivation, fetchpatch
-, base, containers, gomp, hspec, QuickCheck, lib, stdenv
+, base, containers, gomp, hspec, QuickCheck, lib
 , transformers, z3
 }:
 mkDerivation {
diff --git a/pkgs/applications/science/machine-learning/labelimg/default.nix b/pkgs/applications/science/machine-learning/labelimg/default.nix
index 4bfd4b9421f..50d0aa6f9d1 100644
--- a/pkgs/applications/science/machine-learning/labelimg/default.nix
+++ b/pkgs/applications/science/machine-learning/labelimg/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python3Packages, fetchFromGitHub, qt5 }:
+{ lib, python3Packages, fetchFromGitHub, qt5 }:
   python3Packages.buildPythonApplication rec {
     pname = "labelImg";
     version = "1.8.3";
diff --git a/pkgs/applications/science/math/almonds/default.nix b/pkgs/applications/science/math/almonds/default.nix
index 7271b6d8755..ec3891667c5 100644
--- a/pkgs/applications/science/math/almonds/default.nix
+++ b/pkgs/applications/science/math/almonds/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python3, fetchFromGitHub, ncurses }:
+{ lib, python3, fetchFromGitHub, ncurses }:
 
 with python3.pkgs; buildPythonApplication rec {
   pname = "almonds";
diff --git a/pkgs/applications/science/math/cemu/default.nix b/pkgs/applications/science/math/cemu/default.nix
index cc8c3514a0b..9d56ac70d92 100644
--- a/pkgs/applications/science/math/cemu/default.nix
+++ b/pkgs/applications/science/math/cemu/default.nix
@@ -1,5 +1,5 @@
 { fetchFromGitHub
-, lib, stdenv
+, lib
 , mkDerivation
 , SDL2
 , libGL
diff --git a/pkgs/applications/science/misc/rink/default.nix b/pkgs/applications/science/misc/rink/default.nix
index 5670969e7a2..4f0d1eae487 100644
--- a/pkgs/applications/science/misc/rink/default.nix
+++ b/pkgs/applications/science/misc/rink/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, rustPlatform, openssl, pkg-config, ncurses }:
+{ lib, fetchFromGitHub, rustPlatform, openssl, pkg-config, ncurses }:
 
 rustPlatform.buildRustPackage rec {
   version = "0.5.1";
diff --git a/pkgs/applications/science/misc/snakemake/default.nix b/pkgs/applications/science/misc/snakemake/default.nix
index 6b3c405a9ac..edf26f7ec23 100644
--- a/pkgs/applications/science/misc/snakemake/default.nix
+++ b/pkgs/applications/science/misc/snakemake/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python3Packages }:
+{ lib, python3Packages }:
 
 python3Packages.buildPythonApplication rec {
   pname = "snakemake";
diff --git a/pkgs/applications/terminal-emulators/guake/default.nix b/pkgs/applications/terminal-emulators/guake/default.nix
index 77a052a4f1d..62cb6707c1b 100644
--- a/pkgs/applications/terminal-emulators/guake/default.nix
+++ b/pkgs/applications/terminal-emulators/guake/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , fetchFromGitHub
 , python3
 , glibcLocales
diff --git a/pkgs/applications/terminal-emulators/terminator/default.nix b/pkgs/applications/terminal-emulators/terminator/default.nix
index 80698c56cde..433e5c30618 100644
--- a/pkgs/applications/terminal-emulators/terminator/default.nix
+++ b/pkgs/applications/terminal-emulators/terminator/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , fetchFromGitHub
 , python3
 , keybinder3
diff --git a/pkgs/applications/version-management/git-and-tools/bump2version/default.nix b/pkgs/applications/version-management/git-and-tools/bump2version/default.nix
index 393edc57dcc..47d31d6c18f 100644
--- a/pkgs/applications/version-management/git-and-tools/bump2version/default.nix
+++ b/pkgs/applications/version-management/git-and-tools/bump2version/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, buildPythonApplication, fetchFromGitHub, isPy27, pytest, testfixtures, lib }:
+{ buildPythonApplication, fetchFromGitHub, isPy27, pytest, testfixtures, lib }:
 
 buildPythonApplication rec {
   pname = "bump2version";
diff --git a/pkgs/applications/version-management/git-and-tools/ghorg/default.nix b/pkgs/applications/version-management/git-and-tools/ghorg/default.nix
index b038e98e2db..4bfe06fee74 100644
--- a/pkgs/applications/version-management/git-and-tools/ghorg/default.nix
+++ b/pkgs/applications/version-management/git-and-tools/ghorg/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "ghorg";
diff --git a/pkgs/applications/version-management/git-and-tools/ghq/default.nix b/pkgs/applications/version-management/git-and-tools/ghq/default.nix
index c6fbf3b9569..f56ce386e42 100644
--- a/pkgs/applications/version-management/git-and-tools/ghq/default.nix
+++ b/pkgs/applications/version-management/git-and-tools/ghq/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "ghq";
diff --git a/pkgs/applications/version-management/git-and-tools/git-annex-metadata-gui/default.nix b/pkgs/applications/version-management/git-and-tools/git-annex-metadata-gui/default.nix
index 1908b753924..4d57820c84e 100644
--- a/pkgs/applications/version-management/git-and-tools/git-annex-metadata-gui/default.nix
+++ b/pkgs/applications/version-management/git-and-tools/git-annex-metadata-gui/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonApplication, fetchFromGitHub, pyqt5, qt5, git-annex-adapter }:
+{ lib, buildPythonApplication, fetchFromGitHub, pyqt5, qt5, git-annex-adapter }:
 
 buildPythonApplication rec {
   pname = "git-annex-metadata-gui";
diff --git a/pkgs/applications/version-management/git-and-tools/git-annex-remote-b2/default.nix b/pkgs/applications/version-management/git-and-tools/git-annex-remote-b2/default.nix
index 95e583585f1..6d3b6554733 100644
--- a/pkgs/applications/version-management/git-and-tools/git-annex-remote-b2/default.nix
+++ b/pkgs/applications/version-management/git-and-tools/git-annex-remote-b2/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchgit }:
+{ lib, buildGoPackage, fetchgit }:
 
 buildGoPackage rec {
   pname = "git-annex-remote-b2";
diff --git a/pkgs/applications/version-management/git-and-tools/git-appraise/default.nix b/pkgs/applications/version-management/git-and-tools/git-appraise/default.nix
index ba4cd42d29d..33580712932 100644
--- a/pkgs/applications/version-management/git-and-tools/git-appraise/default.nix
+++ b/pkgs/applications/version-management/git-and-tools/git-appraise/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "git-appraise-unstable";
diff --git a/pkgs/applications/version-management/git-and-tools/git-big-picture/default.nix b/pkgs/applications/version-management/git-and-tools/git-big-picture/default.nix
index ec832866c71..5f84d423573 100644
--- a/pkgs/applications/version-management/git-and-tools/git-big-picture/default.nix
+++ b/pkgs/applications/version-management/git-and-tools/git-big-picture/default.nix
@@ -1,4 +1,4 @@
-{ fetchFromGitHub, python3Packages, lib, stdenv, git, graphviz }:
+{ fetchFromGitHub, python3Packages, lib, git, graphviz }:
 
 python3Packages.buildPythonApplication rec {
   pname = "git-big-picture";
diff --git a/pkgs/applications/version-management/git-and-tools/git-bug/default.nix b/pkgs/applications/version-management/git-and-tools/git-bug/default.nix
index 9ca5c707b5c..7a24fe8e035 100644
--- a/pkgs/applications/version-management/git-and-tools/git-bug/default.nix
+++ b/pkgs/applications/version-management/git-and-tools/git-bug/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "git-bug";
diff --git a/pkgs/applications/version-management/git-and-tools/git-cola/default.nix b/pkgs/applications/version-management/git-and-tools/git-cola/default.nix
index e7e0e009d11..5e105ad9dd3 100644
--- a/pkgs/applications/version-management/git-and-tools/git-cola/default.nix
+++ b/pkgs/applications/version-management/git-and-tools/git-cola/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, python3Packages, gettext, git, qt5 }:
+{ lib, fetchFromGitHub, python3Packages, gettext, git, qt5 }:
 
 let
   inherit (python3Packages) buildPythonApplication pyqt5 sip pyinotify;
diff --git a/pkgs/applications/version-management/git-and-tools/git-fame/default.nix b/pkgs/applications/version-management/git-and-tools/git-fame/default.nix
index 216a1035c72..4dc9c4f8453 100644
--- a/pkgs/applications/version-management/git-and-tools/git-fame/default.nix
+++ b/pkgs/applications/version-management/git-and-tools/git-fame/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, bundlerEnv, ruby, bundlerUpdateScript }:
+{ lib, bundlerEnv, ruby, bundlerUpdateScript }:
 
 bundlerEnv {
   inherit ruby;
diff --git a/pkgs/applications/version-management/git-and-tools/git-remote-hg/default.nix b/pkgs/applications/version-management/git-and-tools/git-remote-hg/default.nix
index dd4e6e011a6..69689a49a92 100644
--- a/pkgs/applications/version-management/git-and-tools/git-remote-hg/default.nix
+++ b/pkgs/applications/version-management/git-and-tools/git-remote-hg/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, fetchFromGitHub, python3Packages
+{ lib, fetchFromGitHub, python3Packages
 , asciidoc, xmlto, docbook_xsl, docbook_xml_dtd_45, libxslt, libxml2
 }:
 
diff --git a/pkgs/applications/version-management/git-and-tools/git-vanity-hash/default.nix b/pkgs/applications/version-management/git-and-tools/git-vanity-hash/default.nix
index 77e07743616..85a84103118 100644
--- a/pkgs/applications/version-management/git-and-tools/git-vanity-hash/default.nix
+++ b/pkgs/applications/version-management/git-and-tools/git-vanity-hash/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, rustPlatform }:
+{ lib, fetchFromGitHub, rustPlatform }:
 
 rustPlatform.buildRustPackage rec {
   pname = "git-vanity-hash";
diff --git a/pkgs/applications/version-management/git-and-tools/gitbatch/default.nix b/pkgs/applications/version-management/git-and-tools/gitbatch/default.nix
index dc853be6772..25f7e95d184 100644
--- a/pkgs/applications/version-management/git-and-tools/gitbatch/default.nix
+++ b/pkgs/applications/version-management/git-and-tools/gitbatch/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "gitbatch-unstable";
diff --git a/pkgs/applications/version-management/git-and-tools/gitin/default.nix b/pkgs/applications/version-management/git-and-tools/gitin/default.nix
index e2aaafea202..3d429b7c561 100644
--- a/pkgs/applications/version-management/git-and-tools/gitin/default.nix
+++ b/pkgs/applications/version-management/git-and-tools/gitin/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildGoPackage
 , fetchFromGitHub
 , pkg-config
diff --git a/pkgs/applications/version-management/git-and-tools/gitweb/default.nix b/pkgs/applications/version-management/git-and-tools/gitweb/default.nix
index 6f5ce3358a3..1fa2ebc6f74 100644
--- a/pkgs/applications/version-management/git-and-tools/gitweb/default.nix
+++ b/pkgs/applications/version-management/git-and-tools/gitweb/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildEnv, git, fetchFromGitHub
+{ lib, buildEnv, git, fetchFromGitHub
 , gitwebTheme ? false }:
 
 let
diff --git a/pkgs/applications/version-management/git-and-tools/grv/default.nix b/pkgs/applications/version-management/git-and-tools/grv/default.nix
index 04103465189..e43c602d6d9 100644
--- a/pkgs/applications/version-management/git-and-tools/grv/default.nix
+++ b/pkgs/applications/version-management/git-and-tools/grv/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub, curl, ncurses, pkg-config, readline
+{ lib, buildGoPackage, fetchFromGitHub, curl, ncurses, pkg-config, readline
 , cmake }:
 let
   version = "0.3.2";
diff --git a/pkgs/applications/version-management/git-and-tools/hub/default.nix b/pkgs/applications/version-management/git-and-tools/hub/default.nix
index 4b189c55c8a..e0d7e46d22a 100644
--- a/pkgs/applications/version-management/git-and-tools/hub/default.nix
+++ b/pkgs/applications/version-management/git-and-tools/hub/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub, git, groff, installShellFiles, util-linux, nixosTests }:
+{ lib, buildGoPackage, fetchFromGitHub, git, groff, installShellFiles, util-linux, nixosTests }:
 
 buildGoPackage rec {
   pname = "hub";
diff --git a/pkgs/applications/version-management/git-and-tools/lefthook/default.nix b/pkgs/applications/version-management/git-and-tools/lefthook/default.nix
index ce749308843..18f2e5ad487 100644
--- a/pkgs/applications/version-management/git-and-tools/lefthook/default.nix
+++ b/pkgs/applications/version-management/git-and-tools/lefthook/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 # Currently `buildGo114Module` is passed as `buildGoModule` from
 # `../default.nix`. Please remove the fixed 1.14 once a new release has been
diff --git a/pkgs/applications/version-management/git-and-tools/pass-git-helper/default.nix b/pkgs/applications/version-management/git-and-tools/pass-git-helper/default.nix
index 5feb71c7931..1821dba0f00 100644
--- a/pkgs/applications/version-management/git-and-tools/pass-git-helper/default.nix
+++ b/pkgs/applications/version-management/git-and-tools/pass-git-helper/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonApplication, fetchFromGitHub, pyxdg, pytest, pytest-mock }:
+{ lib, buildPythonApplication, fetchFromGitHub, pyxdg, pytest, pytest-mock }:
 
 buildPythonApplication rec {
   pname   = "pass-git-helper";
diff --git a/pkgs/applications/version-management/git-and-tools/scmpuff/default.nix b/pkgs/applications/version-management/git-and-tools/scmpuff/default.nix
index 69062d305b7..1e65834f519 100644
--- a/pkgs/applications/version-management/git-and-tools/scmpuff/default.nix
+++ b/pkgs/applications/version-management/git-and-tools/scmpuff/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "scmpuff";
diff --git a/pkgs/applications/version-management/git-and-tools/stgit/default.nix b/pkgs/applications/version-management/git-and-tools/stgit/default.nix
index 3a37c798a08..4ee92c1d5e6 100644
--- a/pkgs/applications/version-management/git-and-tools/stgit/default.nix
+++ b/pkgs/applications/version-management/git-and-tools/stgit/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python3Packages, fetchFromGitHub, git, installShellFiles }:
+{ lib, python3Packages, fetchFromGitHub, git, installShellFiles }:
 
 python3Packages.buildPythonApplication rec {
   pname = "stgit";
diff --git a/pkgs/applications/version-management/git-crecord/default.nix b/pkgs/applications/version-management/git-crecord/default.nix
index 3b906e4dc2e..5dc75ce4d70 100644
--- a/pkgs/applications/version-management/git-crecord/default.nix
+++ b/pkgs/applications/version-management/git-crecord/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, pythonPackages }:
+{ lib, fetchFromGitHub, pythonPackages }:
 
 pythonPackages.buildPythonApplication rec {
   pname = "git-crecord";
diff --git a/pkgs/applications/version-management/git-lfs/1.nix b/pkgs/applications/version-management/git-lfs/1.nix
index 3c758908cd4..f72f5190750 100644
--- a/pkgs/applications/version-management/git-lfs/1.nix
+++ b/pkgs/applications/version-management/git-lfs/1.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "git-lfs";
diff --git a/pkgs/applications/version-management/git-up/default.nix b/pkgs/applications/version-management/git-up/default.nix
index 57a40de9d4a..06a2bb48989 100644
--- a/pkgs/applications/version-management/git-up/default.nix
+++ b/pkgs/applications/version-management/git-up/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, pythonPackages, git }:
+{ lib, fetchurl, pythonPackages, git }:
 
 pythonPackages.buildPythonApplication rec {
   pname = "git-up";
diff --git a/pkgs/applications/version-management/gitea/default.nix b/pkgs/applications/version-management/gitea/default.nix
index 68b3a3e9099..f2d258ea1af 100644
--- a/pkgs/applications/version-management/gitea/default.nix
+++ b/pkgs/applications/version-management/gitea/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchurl, makeWrapper
+{ lib, buildGoPackage, fetchurl, makeWrapper
 , git, bash, gzip, openssh, pam
 , sqliteSupport ? true
 , pamSupport ? true
diff --git a/pkgs/applications/version-management/gitinspector/default.nix b/pkgs/applications/version-management/gitinspector/default.nix
index 68dd3c190be..384f5d0f01f 100644
--- a/pkgs/applications/version-management/gitinspector/default.nix
+++ b/pkgs/applications/version-management/gitinspector/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchzip, python2Packages}:
+{ lib, fetchzip, python2Packages}:
 
 python2Packages.buildPythonApplication rec {
   pname = "gitinspector";
diff --git a/pkgs/applications/version-management/gitlab/gitaly/default.nix b/pkgs/applications/version-management/gitlab/gitaly/default.nix
index acfd91be331..d61c97f9bb1 100644
--- a/pkgs/applications/version-management/gitlab/gitaly/default.nix
+++ b/pkgs/applications/version-management/gitlab/gitaly/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitLab, fetchFromGitHub, buildGoModule, ruby
+{ lib, fetchFromGitLab, fetchFromGitHub, buildGoModule, ruby
 , bundlerEnv, pkg-config
 # libgit2 + dependencies
 , libgit2, openssl, zlib, pcre, http-parser }:
diff --git a/pkgs/applications/version-management/gitlab/gitlab-shell/default.nix b/pkgs/applications/version-management/gitlab/gitlab-shell/default.nix
index d1b5958c751..a1a9df57f04 100644
--- a/pkgs/applications/version-management/gitlab/gitlab-shell/default.nix
+++ b/pkgs/applications/version-management/gitlab/gitlab-shell/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitLab, buildGoModule, ruby }:
+{ lib, fetchFromGitLab, buildGoModule, ruby }:
 
 buildGoModule rec {
   pname = "gitlab-shell";
diff --git a/pkgs/applications/version-management/gitlab/gitlab-workhorse/default.nix b/pkgs/applications/version-management/gitlab/gitlab-workhorse/default.nix
index b38485716d7..883753616c9 100644
--- a/pkgs/applications/version-management/gitlab/gitlab-workhorse/default.nix
+++ b/pkgs/applications/version-management/gitlab/gitlab-workhorse/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitLab, git, buildGoModule }:
+{ lib, fetchFromGitLab, git, buildGoModule }:
 
 buildGoModule rec {
   pname = "gitlab-workhorse";
diff --git a/pkgs/applications/version-management/gitless/default.nix b/pkgs/applications/version-management/gitless/default.nix
index e53da902e13..310158e3eea 100644
--- a/pkgs/applications/version-management/gitless/default.nix
+++ b/pkgs/applications/version-management/gitless/default.nix
@@ -1,4 +1,4 @@
-{ fetchFromGitHub, python, lib, stdenv }:
+{ fetchFromGitHub, python, lib }:
 
 with python.pkgs;
 buildPythonApplication rec {
diff --git a/pkgs/applications/version-management/gogs/default.nix b/pkgs/applications/version-management/gogs/default.nix
index fed2fd9ea33..c0b0021f8cb 100644
--- a/pkgs/applications/version-management/gogs/default.nix
+++ b/pkgs/applications/version-management/gogs/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub, makeWrapper
+{ lib, buildGoModule, fetchFromGitHub, makeWrapper
 , git, bash, gzip, openssh, pam
 , sqliteSupport ? true
 , pamSupport ? true
diff --git a/pkgs/applications/version-management/meld/default.nix b/pkgs/applications/version-management/meld/default.nix
index 4f94e2926c4..268098b2d2d 100644
--- a/pkgs/applications/version-management/meld/default.nix
+++ b/pkgs/applications/version-management/meld/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , fetchurl
 , gettext
 , itstool
diff --git a/pkgs/applications/version-management/nitpick/default.nix b/pkgs/applications/version-management/nitpick/default.nix
index ba1f3bbb93b..56d3531f721 100644
--- a/pkgs/applications/version-management/nitpick/default.nix
+++ b/pkgs/applications/version-management/nitpick/default.nix
@@ -1,6 +1,6 @@
 { fetchFromGitHub
 , buildPythonPackage
-, lib, stdenv
+, lib
 , isPy27
 }:
 
diff --git a/pkgs/applications/version-management/peru/default.nix b/pkgs/applications/version-management/peru/default.nix
index d7ad9060879..b7b6d62e4b4 100644
--- a/pkgs/applications/version-management/peru/default.nix
+++ b/pkgs/applications/version-management/peru/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, python3Packages }:
+{ lib, fetchFromGitHub, python3Packages }:
 
 python3Packages.buildPythonApplication rec {
   pname = "peru";
diff --git a/pkgs/applications/version-management/sourcehut/builds.nix b/pkgs/applications/version-management/sourcehut/builds.nix
index 200d1d5384f..3e89fe0a4dc 100644
--- a/pkgs/applications/version-management/sourcehut/builds.nix
+++ b/pkgs/applications/version-management/sourcehut/builds.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchgit, buildPythonPackage
+{ lib, fetchgit, buildPythonPackage
 , python
 , buildGoModule
 , srht, redis, celery, pyyaml, markdown }:
diff --git a/pkgs/applications/version-management/sourcehut/core.nix b/pkgs/applications/version-management/sourcehut/core.nix
index bcc47920ebe..69f8a7d4e45 100644
--- a/pkgs/applications/version-management/sourcehut/core.nix
+++ b/pkgs/applications/version-management/sourcehut/core.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchgit, fetchNodeModules, buildPythonPackage
+{ lib, fetchgit, fetchNodeModules, buildPythonPackage
 , pgpy, flask, bleach, humanize, html5lib, markdown, psycopg2, pygments
 , requests, sqlalchemy, cryptography, beautifulsoup4, sqlalchemy-utils, prometheus_client
 , celery, alembic, importlib-metadata, mistletoe
diff --git a/pkgs/applications/version-management/sourcehut/dispatch.nix b/pkgs/applications/version-management/sourcehut/dispatch.nix
index c7c11cafc8b..ea3f58e3890 100644
--- a/pkgs/applications/version-management/sourcehut/dispatch.nix
+++ b/pkgs/applications/version-management/sourcehut/dispatch.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchgit, buildPythonPackage
+{ lib, fetchgit, buildPythonPackage
 , python
 , srht, pyyaml, PyGithub }:
 
diff --git a/pkgs/applications/version-management/sourcehut/git.nix b/pkgs/applications/version-management/sourcehut/git.nix
index 3ef49b79664..8966cbe0800 100644
--- a/pkgs/applications/version-management/sourcehut/git.nix
+++ b/pkgs/applications/version-management/sourcehut/git.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchgit, buildPythonPackage
+{ lib, fetchgit, buildPythonPackage
 , python
 , buildGoModule
 , srht, minio, pygit2, scmsrht }:
diff --git a/pkgs/applications/version-management/sourcehut/hg.nix b/pkgs/applications/version-management/sourcehut/hg.nix
index d0e14090846..fae311831f2 100644
--- a/pkgs/applications/version-management/sourcehut/hg.nix
+++ b/pkgs/applications/version-management/sourcehut/hg.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchhg, buildPythonPackage
+{ lib, fetchhg, buildPythonPackage
 , python
 , srht, hglib, scmsrht, unidiff }:
 
diff --git a/pkgs/applications/version-management/sourcehut/hub.nix b/pkgs/applications/version-management/sourcehut/hub.nix
index 8ea4961e7d4..99b5663a9b8 100644
--- a/pkgs/applications/version-management/sourcehut/hub.nix
+++ b/pkgs/applications/version-management/sourcehut/hub.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchgit, buildPythonPackage
+{ lib, fetchgit, buildPythonPackage
 , python
 , srht }:
 
diff --git a/pkgs/applications/version-management/sourcehut/lists.nix b/pkgs/applications/version-management/sourcehut/lists.nix
index a0b52a2d564..25d22dede35 100644
--- a/pkgs/applications/version-management/sourcehut/lists.nix
+++ b/pkgs/applications/version-management/sourcehut/lists.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchgit, buildPythonPackage
+{ lib, fetchgit, buildPythonPackage
 , python
 , srht, asyncpg, aiosmtpd, pygit2, emailthreads }:
 
diff --git a/pkgs/applications/version-management/sourcehut/man.nix b/pkgs/applications/version-management/sourcehut/man.nix
index 26939d2bebe..24a31a3ef17 100644
--- a/pkgs/applications/version-management/sourcehut/man.nix
+++ b/pkgs/applications/version-management/sourcehut/man.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchgit, buildPythonPackage
+{ lib, fetchgit, buildPythonPackage
 , python
 , srht, pygit2 }:
 
diff --git a/pkgs/applications/version-management/sourcehut/meta.nix b/pkgs/applications/version-management/sourcehut/meta.nix
index b6622d97487..d07bd29357a 100644
--- a/pkgs/applications/version-management/sourcehut/meta.nix
+++ b/pkgs/applications/version-management/sourcehut/meta.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchgit, buildPythonPackage
+{ lib, fetchgit, buildPythonPackage
 , python
 , buildGoModule
 , pgpy, srht, redis, bcrypt, qrcode, stripe, zxcvbn, alembic, pystache
diff --git a/pkgs/applications/version-management/sourcehut/paste.nix b/pkgs/applications/version-management/sourcehut/paste.nix
index eaec8b710dd..12747f98103 100644
--- a/pkgs/applications/version-management/sourcehut/paste.nix
+++ b/pkgs/applications/version-management/sourcehut/paste.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchgit, buildPythonPackage
+{ lib, fetchgit, buildPythonPackage
 , python
 , srht, pyyaml }:
 
diff --git a/pkgs/applications/version-management/sourcehut/scm.nix b/pkgs/applications/version-management/sourcehut/scm.nix
index 6e8b03835bc..615716d03af 100644
--- a/pkgs/applications/version-management/sourcehut/scm.nix
+++ b/pkgs/applications/version-management/sourcehut/scm.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchgit, buildPythonPackage
+{ lib, fetchgit, buildPythonPackage
 , srht, redis, pyyaml, buildsrht
 , writeText }:
 
diff --git a/pkgs/applications/version-management/sourcehut/todo.nix b/pkgs/applications/version-management/sourcehut/todo.nix
index 357dcd4d2e2..85ae3b2cf14 100644
--- a/pkgs/applications/version-management/sourcehut/todo.nix
+++ b/pkgs/applications/version-management/sourcehut/todo.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchgit, buildPythonPackage
+{ lib, fetchgit, buildPythonPackage
 , python
 , srht, redis, alembic, pystache
 , pytest, factory_boy, writeText }:
diff --git a/pkgs/applications/video/clipgrab/default.nix b/pkgs/applications/video/clipgrab/default.nix
index c1701dd5174..6db2450d136 100644
--- a/pkgs/applications/video/clipgrab/default.nix
+++ b/pkgs/applications/video/clipgrab/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, makeDesktopItem, ffmpeg_3
+{ lib, fetchurl, makeDesktopItem, ffmpeg_3
 , qmake, qttools, mkDerivation
 , qtbase, qtdeclarative, qtlocation, qtquickcontrols2, qtwebchannel, qtwebengine
 }:
diff --git a/pkgs/applications/video/devede/default.nix b/pkgs/applications/video/devede/default.nix
index 4b1b7ae0b60..6a4d0dc1b8d 100644
--- a/pkgs/applications/video/devede/default.nix
+++ b/pkgs/applications/video/devede/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitLab, python3Packages, ffmpeg_3, mplayer, vcdimager, cdrkit, dvdauthor
+{ lib, fetchFromGitLab, python3Packages, ffmpeg_3, mplayer, vcdimager, cdrkit, dvdauthor
 , gtk3, gettext, wrapGAppsHook, gdk-pixbuf, gobject-introspection }:
 
 let
diff --git a/pkgs/applications/video/electronplayer/electronplayer.nix b/pkgs/applications/video/electronplayer/electronplayer.nix
index a4ebbf159b8..15f5b60a09a 100644
--- a/pkgs/applications/video/electronplayer/electronplayer.nix
+++ b/pkgs/applications/video/electronplayer/electronplayer.nix
@@ -1,4 +1,4 @@
-{ appimageTools, lib, stdenv, fetchurl }:
+{ appimageTools, lib, fetchurl }:
 let
   pname = "electronplayer";
   version = "2.0.8";
diff --git a/pkgs/applications/video/jellyfin-mpv-shim/default.nix b/pkgs/applications/video/jellyfin-mpv-shim/default.nix
index fe06e9431f9..6dc42a47685 100644
--- a/pkgs/applications/video/jellyfin-mpv-shim/default.nix
+++ b/pkgs/applications/video/jellyfin-mpv-shim/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonApplication, fetchFromGitHub, callPackage
+{ lib, buildPythonApplication, fetchFromGitHub, callPackage
 , mpv, python-mpv-jsonipc, jellyfin-apiclient-python
 , pillow, tkinter, pystray, jinja2, pywebview }:
 
diff --git a/pkgs/applications/video/kazam/default.nix b/pkgs/applications/video/kazam/default.nix
index e6e971ad438..35b7d173257 100644
--- a/pkgs/applications/video/kazam/default.nix
+++ b/pkgs/applications/video/kazam/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, substituteAll, python3, gst_all_1, wrapGAppsHook, gobject-introspection
+{ lib, fetchurl, substituteAll, python3, gst_all_1, wrapGAppsHook, gobject-introspection
 , gtk3, libwnck3, keybinder3, intltool, libcanberra-gtk3, libappindicator-gtk3, libpulseaudio
 , fetchpatch }:
 
diff --git a/pkgs/applications/video/kodi/wrapper.nix b/pkgs/applications/video/kodi/wrapper.nix
index 6bec8f9c891..80a36df3de7 100644
--- a/pkgs/applications/video/kodi/wrapper.nix
+++ b/pkgs/applications/video/kodi/wrapper.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, makeWrapper, buildEnv, kodi, plugins }:
+{ lib, makeWrapper, buildEnv, kodi, plugins }:
 
 let
   drvName = builtins.parseDrvName kodi.name;
diff --git a/pkgs/applications/video/makemkv/default.nix b/pkgs/applications/video/makemkv/default.nix
index 29676abb755..cec6468c43b 100644
--- a/pkgs/applications/video/makemkv/default.nix
+++ b/pkgs/applications/video/makemkv/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , mkDerivation
 , fetchurl
 , autoPatchelfHook
diff --git a/pkgs/applications/video/mythtv/default.nix b/pkgs/applications/video/mythtv/default.nix
index a58c32dc563..236aec2ee56 100644
--- a/pkgs/applications/video/mythtv/default.nix
+++ b/pkgs/applications/video/mythtv/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, mkDerivation, fetchFromGitHub, which, qtbase, qtwebkit, qtscript, xlibsWrapper
+{ lib, mkDerivation, fetchFromGitHub, which, qtbase, qtwebkit, qtscript, xlibsWrapper
 , libpulseaudio, fftwSinglePrec , lame, zlib, libGLU, libGL, alsaLib, freetype
 , perl, pkg-config , libsamplerate, libbluray, lzo, libX11, libXv, libXrandr, libXvMC, libXinerama, libXxf86vm
 , libXmu , yasm, libuuid, taglib, libtool, autoconf, automake, file, exiv2, linuxHeaders
diff --git a/pkgs/applications/video/pitivi/default.nix b/pkgs/applications/video/pitivi/default.nix
index 1b2af7614ab..e388d5a67fe 100644
--- a/pkgs/applications/video/pitivi/default.nix
+++ b/pkgs/applications/video/pitivi/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , fetchFromGitHub
 , fetchurl
 , pkg-config
diff --git a/pkgs/applications/video/plex-media-player/default.nix b/pkgs/applications/video/plex-media-player/default.nix
index e690c507024..e7a735f167c 100644
--- a/pkgs/applications/video/plex-media-player/default.nix
+++ b/pkgs/applications/video/plex-media-player/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, fetchurl, pkg-config, cmake, python3, mkDerivation
+{ lib, fetchFromGitHub, fetchurl, pkg-config, cmake, python3, mkDerivation
 , libX11, libXrandr, qtbase, qtwebchannel, qtwebengine, qtx11extras
 , libvdpau, SDL2, mpv, libGL }:
 let
diff --git a/pkgs/applications/video/plex-mpv-shim/default.nix b/pkgs/applications/video/plex-mpv-shim/default.nix
index 7738dd99d21..d0904790a9e 100644
--- a/pkgs/applications/video/plex-mpv-shim/default.nix
+++ b/pkgs/applications/video/plex-mpv-shim/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonApplication, fetchFromGitHub, mpv, requests, python-mpv-jsonipc }:
+{ lib, buildPythonApplication, fetchFromGitHub, mpv, requests, python-mpv-jsonipc }:
 
 buildPythonApplication rec {
   pname = "plex-mpv-shim";
diff --git a/pkgs/applications/video/pyca/default.nix b/pkgs/applications/video/pyca/default.nix
index bf54c0a2d6c..df42bbec156 100644
--- a/pkgs/applications/video/pyca/default.nix
+++ b/pkgs/applications/video/pyca/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonApplication, fetchFromGitHub, pycurl, dateutil, configobj, sqlalchemy, sdnotify, flask }:
+{ lib, buildPythonApplication, fetchFromGitHub, pycurl, dateutil, configobj, sqlalchemy, sdnotify, flask }:
 
 buildPythonApplication rec {
   pname = "pyca";
diff --git a/pkgs/applications/video/qmediathekview/default.nix b/pkgs/applications/video/qmediathekview/default.nix
index b05fa113a30..d0f41413570 100644
--- a/pkgs/applications/video/qmediathekview/default.nix
+++ b/pkgs/applications/video/qmediathekview/default.nix
@@ -1,4 +1,4 @@
-{ mkDerivation, lib, stdenv, fetchFromGitHub, qtbase, qttools, xz, boost, qmake, pkg-config }:
+{ mkDerivation, lib, fetchFromGitHub, qtbase, qttools, xz, boost, qmake, pkg-config }:
 
 mkDerivation rec {
   pname = "QMediathekView";
diff --git a/pkgs/applications/video/shotcut/default.nix b/pkgs/applications/video/shotcut/default.nix
index ade4b61931b..d580d98a6c1 100644
--- a/pkgs/applications/video/shotcut/default.nix
+++ b/pkgs/applications/video/shotcut/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , fetchFromGitHub
 , fetchpatch
 , mkDerivation
diff --git a/pkgs/applications/video/tartube/default.nix b/pkgs/applications/video/tartube/default.nix
index 3bd48019d0d..12525da35c4 100644
--- a/pkgs/applications/video/tartube/default.nix
+++ b/pkgs/applications/video/tartube/default.nix
@@ -1,5 +1,4 @@
-{ stdenv
-, lib
+{ lib
 , fetchFromGitHub
 , gdk-pixbuf
 , gobject-introspection
diff --git a/pkgs/applications/video/vokoscreen/default.nix b/pkgs/applications/video/vokoscreen/default.nix
index 06e91218cac..598a162f399 100644
--- a/pkgs/applications/video/vokoscreen/default.nix
+++ b/pkgs/applications/video/vokoscreen/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, mkDerivation
+{ lib, fetchFromGitHub, mkDerivation
 , pkg-config, qtbase, qttools, qmake, qtmultimedia, qtx11extras, alsaLib, libv4l, libXrandr
 , ffmpeg
 }:
diff --git a/pkgs/applications/virtualization/aqemu/default.nix b/pkgs/applications/virtualization/aqemu/default.nix
index d31523e946a..2d865f41818 100644
--- a/pkgs/applications/virtualization/aqemu/default.nix
+++ b/pkgs/applications/virtualization/aqemu/default.nix
@@ -1,4 +1,4 @@
-{ mkDerivation, cmake, fetchFromGitHub, libvncserver, qemu, qtbase, lib, stdenv
+{ mkDerivation, cmake, fetchFromGitHub, libvncserver, qemu, qtbase, lib
 }:
 
 mkDerivation rec {
diff --git a/pkgs/applications/virtualization/cntr/default.nix b/pkgs/applications/virtualization/cntr/default.nix
index f7b7c99b554..2283b45aee4 100644
--- a/pkgs/applications/virtualization/cntr/default.nix
+++ b/pkgs/applications/virtualization/cntr/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, rustPlatform, fetchFromGitHub }:
+{ lib, rustPlatform, fetchFromGitHub }:
 
 rustPlatform.buildRustPackage rec {
   pname = "cntr";
diff --git a/pkgs/applications/virtualization/cri-o/default.nix b/pkgs/applications/virtualization/cri-o/default.nix
index 388cf328ff5..99505371507 100644
--- a/pkgs/applications/virtualization/cri-o/default.nix
+++ b/pkgs/applications/virtualization/cri-o/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , btrfs-progs
 , buildGoModule
 , fetchFromGitHub
diff --git a/pkgs/applications/virtualization/docker-compose/default.nix b/pkgs/applications/virtualization/docker-compose/default.nix
index 3dabcf57daf..e4e7a204934 100644
--- a/pkgs/applications/virtualization/docker-compose/default.nix
+++ b/pkgs/applications/virtualization/docker-compose/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonApplication, fetchPypi, pythonOlder
+{ lib, buildPythonApplication, fetchPypi, pythonOlder
 , installShellFiles
 , mock, pytest, nose
 , pyyaml, backports_ssl_match_hostname, colorama, docopt
diff --git a/pkgs/applications/virtualization/docker-slim/default.nix b/pkgs/applications/virtualization/docker-slim/default.nix
index 6c1ef95cd6f..59c59426830 100644
--- a/pkgs/applications/virtualization/docker-slim/default.nix
+++ b/pkgs/applications/virtualization/docker-slim/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildGoPackage
 , fetchFromGitHub
 , makeWrapper
diff --git a/pkgs/applications/virtualization/docker/buildx.nix b/pkgs/applications/virtualization/docker/buildx.nix
index 9eb03508572..84019395853 100644
--- a/pkgs/applications/virtualization/docker/buildx.nix
+++ b/pkgs/applications/virtualization/docker/buildx.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "docker-buildx";
diff --git a/pkgs/applications/virtualization/docker/distribution.nix b/pkgs/applications/virtualization/docker/distribution.nix
index f41862c0dd1..96722fe393f 100644
--- a/pkgs/applications/virtualization/docker/distribution.nix
+++ b/pkgs/applications/virtualization/docker/distribution.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "distribution";
diff --git a/pkgs/applications/virtualization/docker/proxy.nix b/pkgs/applications/virtualization/docker/proxy.nix
index 7fd7cda81e2..59fc80eefbf 100644
--- a/pkgs/applications/virtualization/docker/proxy.nix
+++ b/pkgs/applications/virtualization/docker/proxy.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   name = "docker-proxy-${rev}";
diff --git a/pkgs/applications/virtualization/ecs-agent/default.nix b/pkgs/applications/virtualization/ecs-agent/default.nix
index 41a09315333..390f3049c02 100644
--- a/pkgs/applications/virtualization/ecs-agent/default.nix
+++ b/pkgs/applications/virtualization/ecs-agent/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, buildGoPackage }:
+{ lib, fetchFromGitHub, buildGoPackage }:
 
 buildGoPackage rec {
   pname   = "amazon-ecs-agent";
diff --git a/pkgs/applications/virtualization/firectl/default.nix b/pkgs/applications/virtualization/firectl/default.nix
index 0b5fc5dac52..ac531b36dd2 100644
--- a/pkgs/applications/virtualization/firectl/default.nix
+++ b/pkgs/applications/virtualization/firectl/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "firectl";
diff --git a/pkgs/applications/virtualization/gvisor/default.nix b/pkgs/applications/virtualization/gvisor/default.nix
index 2d423911c99..fd001d598ad 100644
--- a/pkgs/applications/virtualization/gvisor/default.nix
+++ b/pkgs/applications/virtualization/gvisor/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildBazelPackage
 , fetchFromGitHub
 , cacert
diff --git a/pkgs/applications/virtualization/qtemu/default.nix b/pkgs/applications/virtualization/qtemu/default.nix
index 00dffc385a1..3a5f26bfcc8 100644
--- a/pkgs/applications/virtualization/qtemu/default.nix
+++ b/pkgs/applications/virtualization/qtemu/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, mkDerivation, fetchFromGitLab, pkg-config, qmake, qtbase, qemu, makeWrapper }:
+{ lib, mkDerivation, fetchFromGitLab, pkg-config, qmake, qtbase, qemu, makeWrapper }:
 
 mkDerivation rec {
   pname = "qtemu";
diff --git a/pkgs/applications/virtualization/singularity/default.nix b/pkgs/applications/virtualization/singularity/default.nix
index 6961dcf7b89..24b71b46165 100644
--- a/pkgs/applications/virtualization/singularity/default.nix
+++ b/pkgs/applications/virtualization/singularity/default.nix
@@ -1,5 +1,4 @@
-{stdenv
-, lib
+{ lib
 , fetchurl
 , util-linux
 , gpgme
diff --git a/pkgs/applications/virtualization/virt-manager/default.nix b/pkgs/applications/virtualization/virt-manager/default.nix
index 8fe9caf0e57..11ddaff8d3b 100644
--- a/pkgs/applications/virtualization/virt-manager/default.nix
+++ b/pkgs/applications/virtualization/virt-manager/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, python3Packages, intltool, file
+{ lib, fetchurl, python3Packages, intltool, file
 , wrapGAppsHook, gtk-vnc, vte, avahi, dconf
 , gobject-introspection, libvirt-glib, system-libvirt
 , gsettings-desktop-schemas, glib, libosinfo, gnome3
diff --git a/pkgs/applications/virtualization/xen/4.10.nix b/pkgs/applications/virtualization/xen/4.10.nix
index 2f9882dee9b..bc9003e128a 100644
--- a/pkgs/applications/virtualization/xen/4.10.nix
+++ b/pkgs/applications/virtualization/xen/4.10.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, callPackage, fetchurl, fetchpatch, fetchgit
+{ lib, callPackage, fetchurl, fetchpatch, fetchgit
 , ocaml-ng
 , withInternalQemu ? true
 , withInternalTraditionalQemu ? true
diff --git a/pkgs/applications/virtualization/xen/packages.nix b/pkgs/applications/virtualization/xen/packages.nix
index 55e3b12c3b7..5ff263dc8ff 100644
--- a/pkgs/applications/virtualization/xen/packages.nix
+++ b/pkgs/applications/virtualization/xen/packages.nix
@@ -1,5 +1,5 @@
 { callPackage
-, stdenv
+
 }:
 
 # TODO(@oxij) on new Xen version: generalize this to generate [vanilla slim
diff --git a/pkgs/applications/window-managers/btops/default.nix b/pkgs/applications/window-managers/btops/default.nix
index f0bb26f43e2..5f107337ee4 100644
--- a/pkgs/applications/window-managers/btops/default.nix
+++ b/pkgs/applications/window-managers/btops/default.nix
@@ -1,5 +1,5 @@
 # This file was generated by https://github.com/kamilchm/go2nix v1.2.1
-{ lib, stdenv, buildGoPackage, fetchgit }:
+{ lib, buildGoPackage, fetchgit }:
 
 buildGoPackage rec {
   pname = "btops";
diff --git a/pkgs/applications/window-managers/dwm/dwm-status.nix b/pkgs/applications/window-managers/dwm/dwm-status.nix
index 1724a2c9824..d419b0ebe3a 100644
--- a/pkgs/applications/window-managers/dwm/dwm-status.nix
+++ b/pkgs/applications/window-managers/dwm/dwm-status.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, rustPlatform, fetchFromGitHub, dbus, gdk-pixbuf, libnotify, makeWrapper, pkg-config, xorg
+{ lib, rustPlatform, fetchFromGitHub, dbus, gdk-pixbuf, libnotify, makeWrapper, pkg-config, xorg
 , enableAlsaUtils ? true, alsaUtils, coreutils
 , enableNetwork ? true, dnsutils, iproute, wirelesstools }:
 
diff --git a/pkgs/applications/window-managers/i3/gaps.nix b/pkgs/applications/window-managers/i3/gaps.nix
index 52322d8e194..1a11d40e3df 100644
--- a/pkgs/applications/window-managers/i3/gaps.nix
+++ b/pkgs/applications/window-managers/i3/gaps.nix
@@ -1,4 +1,4 @@
-{ fetchurl, lib, stdenv, i3, autoreconfHook }:
+{ fetchurl, lib, i3, autoreconfHook }:
 
 i3.overrideAttrs (oldAttrs : rec {
 
diff --git a/pkgs/applications/window-managers/i3/pystatus.nix b/pkgs/applications/window-managers/i3/pystatus.nix
index 404e7b41f55..bddaab61578 100644
--- a/pkgs/applications/window-managers/i3/pystatus.nix
+++ b/pkgs/applications/window-managers/i3/pystatus.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , fetchFromGitHub
 , libpulseaudio
 , libnotify
diff --git a/pkgs/applications/window-managers/i3/status-rust.nix b/pkgs/applications/window-managers/i3/status-rust.nix
index b9dbe6136b4..be7e88a2501 100644
--- a/pkgs/applications/window-managers/i3/status-rust.nix
+++ b/pkgs/applications/window-managers/i3/status-rust.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , rustPlatform
 , fetchFromGitHub
 , pkg-config
diff --git a/pkgs/applications/window-managers/i3/wk-switch.nix b/pkgs/applications/window-managers/i3/wk-switch.nix
index e7fd87aaf3b..d0055ef6365 100644
--- a/pkgs/applications/window-managers/i3/wk-switch.nix
+++ b/pkgs/applications/window-managers/i3/wk-switch.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, python3Packages }:
+{ lib, fetchFromGitHub, python3Packages }:
 
 python3Packages.buildPythonApplication rec {
   pname = "i3-wk-switch";
diff --git a/pkgs/applications/window-managers/i3/wmfocus.nix b/pkgs/applications/window-managers/i3/wmfocus.nix
index db6ec29d9e9..9169cfc3817 100644
--- a/pkgs/applications/window-managers/i3/wmfocus.nix
+++ b/pkgs/applications/window-managers/i3/wmfocus.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, rustPlatform
+{ lib, fetchFromGitHub, rustPlatform
 , xorg, python3, pkg-config, cairo, libxkbcommon }:
 
 rustPlatform.buildRustPackage rec {
diff --git a/pkgs/applications/window-managers/leftwm/default.nix b/pkgs/applications/window-managers/leftwm/default.nix
index 712e9ab22c7..cdef71c965e 100644
--- a/pkgs/applications/window-managers/leftwm/default.nix
+++ b/pkgs/applications/window-managers/leftwm/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, rustPlatform, libX11, libXinerama, makeWrapper }:
+{ lib, fetchFromGitHub, rustPlatform, libX11, libXinerama, makeWrapper }:
 
 let
     rpath = lib.makeLibraryPath [ libXinerama libX11 ];
diff --git a/pkgs/applications/window-managers/qtile/default.nix b/pkgs/applications/window-managers/qtile/default.nix
index 709a5b14736..21059c25afb 100644
--- a/pkgs/applications/window-managers/qtile/default.nix
+++ b/pkgs/applications/window-managers/qtile/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, python37Packages, glib, cairo, pango, pkg-config, libxcb, xcbutilcursor }:
+{ lib, fetchFromGitHub, python37Packages, glib, cairo, pango, pkg-config, libxcb, xcbutilcursor }:
 
 let cairocffi-xcffib = python37Packages.cairocffi.override {
     withXcffib = true;
diff --git a/pkgs/applications/window-managers/sway/wrapper.nix b/pkgs/applications/window-managers/sway/wrapper.nix
index 0a80ce70e03..319023eb2e5 100644
--- a/pkgs/applications/window-managers/sway/wrapper.nix
+++ b/pkgs/applications/window-managers/sway/wrapper.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , sway-unwrapped
 , makeWrapper, symlinkJoin, writeShellScriptBin
 , withBaseWrapper ? true, extraSessionCommands ? "", dbus
diff --git a/pkgs/build-support/appimage/default.nix b/pkgs/build-support/appimage/default.nix
index 170c25dffe2..1613e9dea24 100644
--- a/pkgs/build-support/appimage/default.nix
+++ b/pkgs/build-support/appimage/default.nix
@@ -1,5 +1,5 @@
 { lib
-, stdenv
+
 , bash
 , binutils-unwrapped
 , coreutils
diff --git a/pkgs/build-support/build-fhs-userenv-bubblewrap/default.nix b/pkgs/build-support/build-fhs-userenv-bubblewrap/default.nix
index b40569a479b..9a9e5a9ce10 100644
--- a/pkgs/build-support/build-fhs-userenv-bubblewrap/default.nix
+++ b/pkgs/build-support/build-fhs-userenv-bubblewrap/default.nix
@@ -1,4 +1,4 @@
-{ lib, callPackage, runCommandLocal, writeShellScriptBin, stdenv, coreutils, bubblewrap }:
+{ lib, callPackage, runCommandLocal, writeShellScriptBin, coreutils, bubblewrap }:
 
 args @ {
   name
diff --git a/pkgs/build-support/emacs/trivial.nix b/pkgs/build-support/emacs/trivial.nix
index 396c971b2f0..9a36b44a270 100644
--- a/pkgs/build-support/emacs/trivial.nix
+++ b/pkgs/build-support/emacs/trivial.nix
@@ -1,6 +1,6 @@
 # trivial builder for Emacs packages
 
-{ lib, stdenv, texinfo, ... }@envargs:
+{ lib, texinfo, ... }@envargs:
 
 with lib;
 
diff --git a/pkgs/build-support/fetchdocker/fetchDockerConfig.nix b/pkgs/build-support/fetchdocker/fetchDockerConfig.nix
index 9fd813bfa57..e8b2403d8f3 100644
--- a/pkgs/build-support/fetchdocker/fetchDockerConfig.nix
+++ b/pkgs/build-support/fetchdocker/fetchDockerConfig.nix
@@ -1,4 +1,4 @@
-pkgargs@{ stdenv, lib, haskellPackages, writeText, gawk }:
+pkgargs@{ lib, haskellPackages, writeText, gawk }:
 let
   generic-fetcher =
     import ./generic-fetcher.nix pkgargs;
diff --git a/pkgs/build-support/fetchdocker/fetchDockerLayer.nix b/pkgs/build-support/fetchdocker/fetchDockerLayer.nix
index 869ba637429..0fbbc078efc 100644
--- a/pkgs/build-support/fetchdocker/fetchDockerLayer.nix
+++ b/pkgs/build-support/fetchdocker/fetchDockerLayer.nix
@@ -1,4 +1,4 @@
-pkgargs@{ stdenv, lib, haskellPackages, writeText, gawk }:
+pkgargs@{ lib, haskellPackages, writeText, gawk }:
 let
   generic-fetcher =
     import ./generic-fetcher.nix pkgargs;
diff --git a/pkgs/build-support/plugins.nix b/pkgs/build-support/plugins.nix
index 1ed74851597..31b478c6c0d 100644
--- a/pkgs/build-support/plugins.nix
+++ b/pkgs/build-support/plugins.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv }:
+{ lib }:
 # helper functions for packaging programs with plugin systems
 {
 
diff --git a/pkgs/common-updater/unstable-updater.nix b/pkgs/common-updater/unstable-updater.nix
index 94cd33b9a26..d315c1027ab 100644
--- a/pkgs/common-updater/unstable-updater.nix
+++ b/pkgs/common-updater/unstable-updater.nix
@@ -1,5 +1,4 @@
-{ stdenv
-, writeShellScript
+{ writeShellScript
 , coreutils
 , git
 , nix
diff --git a/pkgs/data/documentation/zeal/default.nix b/pkgs/data/documentation/zeal/default.nix
index a6c0b1f4918..8c806b87d4b 100644
--- a/pkgs/data/documentation/zeal/default.nix
+++ b/pkgs/data/documentation/zeal/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, cmake, extra-cmake-modules, pkg-config
+{ lib, fetchFromGitHub, cmake, extra-cmake-modules, pkg-config
 , qtbase, qtimageformats, qtwebengine, qtx11extras, mkDerivation
 , libarchive, libXdmcp, libpthreadstubs, xcbutilkeysyms  }:
 
diff --git a/pkgs/data/fonts/et-book/default.nix b/pkgs/data/fonts/et-book/default.nix
index e7d97b77707..c410826b2fb 100644
--- a/pkgs/data/fonts/et-book/default.nix
+++ b/pkgs/data/fonts/et-book/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub }:
+{ lib, fetchFromGitHub }:
 
 fetchFromGitHub rec {
   rev = "7e8f02dadcc23ba42b491b39e5bdf16e7b383031";
diff --git a/pkgs/data/fonts/fira-code/default.nix b/pkgs/data/fonts/fira-code/default.nix
index 546c7d905a7..d5c5d0e000a 100644
--- a/pkgs/data/fonts/fira-code/default.nix
+++ b/pkgs/data/fonts/fira-code/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchzip }:
+{ lib, fetchzip }:
 
 let
   version = "5.2";
diff --git a/pkgs/data/fonts/fira-code/symbols.nix b/pkgs/data/fonts/fira-code/symbols.nix
index 2e4cfc8f05b..e226c351a33 100644
--- a/pkgs/data/fonts/fira-code/symbols.nix
+++ b/pkgs/data/fonts/fira-code/symbols.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchzip }:
+{ lib, fetchzip }:
 
 fetchzip {
   name = "fira-code-symbols-20160811";
diff --git a/pkgs/data/fonts/fira-mono/default.nix b/pkgs/data/fonts/fira-mono/default.nix
index 37f285b5552..2aef2fc4b05 100644
--- a/pkgs/data/fonts/fira-mono/default.nix
+++ b/pkgs/data/fonts/fira-mono/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchzip }:
+{ lib, fetchzip }:
 
 fetchzip {
   name = "fira-mono-3.206";
diff --git a/pkgs/data/fonts/fixedsys-excelsior/default.nix b/pkgs/data/fonts/fixedsys-excelsior/default.nix
index e55ae0bcf11..8bdbc2d4c4f 100644
--- a/pkgs/data/fonts/fixedsys-excelsior/default.nix
+++ b/pkgs/data/fonts/fixedsys-excelsior/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl } :
+{ lib, fetchurl } :
 
 let
   major = "3";
diff --git a/pkgs/data/fonts/go-font/default.nix b/pkgs/data/fonts/go-font/default.nix
index 056cd621394..ed17dfc9054 100644
--- a/pkgs/data/fonts/go-font/default.nix
+++ b/pkgs/data/fonts/go-font/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchgit }:
+{ lib, fetchgit }:
 
 let
   version = "2017-03-30";
diff --git a/pkgs/data/fonts/jost/default.nix b/pkgs/data/fonts/jost/default.nix
index a8df441d999..457cb0d03c9 100644
--- a/pkgs/data/fonts/jost/default.nix
+++ b/pkgs/data/fonts/jost/default.nix
@@ -1,4 +1,4 @@
-{lib, stdenv, fetchzip}:
+{lib, fetchzip}:
 
 let
   version = "3.5";
diff --git a/pkgs/data/fonts/paratype-pt/mono.nix b/pkgs/data/fonts/paratype-pt/mono.nix
index eecab47c087..6b1cd370241 100644
--- a/pkgs/data/fonts/paratype-pt/mono.nix
+++ b/pkgs/data/fonts/paratype-pt/mono.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchzip }:
+{ lib, fetchzip }:
 
 fetchzip {
   name = "paratype-pt-mono";
diff --git a/pkgs/data/fonts/paratype-pt/sans.nix b/pkgs/data/fonts/paratype-pt/sans.nix
index 826b8887365..d6b783ebe4c 100644
--- a/pkgs/data/fonts/paratype-pt/sans.nix
+++ b/pkgs/data/fonts/paratype-pt/sans.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchzip }:
+{ lib, fetchzip }:
 
 fetchzip {
   name = "paratype-pt-sans";
diff --git a/pkgs/data/fonts/paratype-pt/serif.nix b/pkgs/data/fonts/paratype-pt/serif.nix
index bbff974e107..2b5eeafd09b 100644
--- a/pkgs/data/fonts/paratype-pt/serif.nix
+++ b/pkgs/data/fonts/paratype-pt/serif.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchzip }:
+{ lib, fetchzip }:
 
 fetchzip {
   name = "paratype-pt-serif";
diff --git a/pkgs/data/fonts/ttf-bitstream-vera/default.nix b/pkgs/data/fonts/ttf-bitstream-vera/default.nix
index bcf6cefb8d6..95e4ce2a52a 100644
--- a/pkgs/data/fonts/ttf-bitstream-vera/default.nix
+++ b/pkgs/data/fonts/ttf-bitstream-vera/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchzip }:
+{ lib, fetchzip }:
 let
   pname = "ttf-bitstream-vera";
   version = "1.10";
diff --git a/pkgs/data/fonts/ttf-tw-moe/default.nix b/pkgs/data/fonts/ttf-tw-moe/default.nix
index 69579289442..bf52d07c52e 100644
--- a/pkgs/data/fonts/ttf-tw-moe/default.nix
+++ b/pkgs/data/fonts/ttf-tw-moe/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchzip }:
+{ lib, fetchzip }:
 let
   version = "2020-11-14";
 in
diff --git a/pkgs/data/fonts/vista-fonts/default.nix b/pkgs/data/fonts/vista-fonts/default.nix
index b71ef7c99ec..20b5b673ccf 100644
--- a/pkgs/data/fonts/vista-fonts/default.nix
+++ b/pkgs/data/fonts/vista-fonts/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchzip, cabextract }:
+{ lib, fetchzip, cabextract }:
 
 fetchzip {
   name = "vista-fonts-1";
diff --git a/pkgs/data/misc/iana-etc/default.nix b/pkgs/data/misc/iana-etc/default.nix
index 1936bd6627a..421054fa17f 100644
--- a/pkgs/data/misc/iana-etc/default.nix
+++ b/pkgs/data/misc/iana-etc/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchzip }:
+{ lib, fetchzip }:
 
 let
   version = "20200729";
diff --git a/pkgs/data/misc/mime-types/default.nix b/pkgs/data/misc/mime-types/default.nix
index dc942868250..77b67e48f92 100644
--- a/pkgs/data/misc/mime-types/default.nix
+++ b/pkgs/data/misc/mime-types/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchzip }:
+{ lib, fetchzip }:
 
 let
   version = "9";
diff --git a/pkgs/data/misc/unicode-emoji/default.nix b/pkgs/data/misc/unicode-emoji/default.nix
index 60ff492330d..b91afb08f60 100644
--- a/pkgs/data/misc/unicode-emoji/default.nix
+++ b/pkgs/data/misc/unicode-emoji/default.nix
@@ -1,7 +1,6 @@
-{ stdenv
+{ lib
 , fetchurl
 , symlinkJoin
-, lib
 }:
 
 let
diff --git a/pkgs/desktops/cinnamon/cinnamon-gsettings-overrides/default.nix b/pkgs/desktops/cinnamon/cinnamon-gsettings-overrides/default.nix
index 26d9be6d904..832a534e5da 100644
--- a/pkgs/desktops/cinnamon/cinnamon-gsettings-overrides/default.nix
+++ b/pkgs/desktops/cinnamon/cinnamon-gsettings-overrides/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , runCommand
 , nixos-artwork
 , glib
diff --git a/pkgs/desktops/cinnamon/warpinator/default.nix b/pkgs/desktops/cinnamon/warpinator/default.nix
index 2338c834d1f..efcd20457b3 100644
--- a/pkgs/desktops/cinnamon/warpinator/default.nix
+++ b/pkgs/desktops/cinnamon/warpinator/default.nix
@@ -1,5 +1,5 @@
 { fetchFromGitHub
-, lib, stdenv
+, lib
 , gobject-introspection
 , meson
 , ninja
diff --git a/pkgs/desktops/gnome-3/apps/accerciser/default.nix b/pkgs/desktops/gnome-3/apps/accerciser/default.nix
index 550f3f31d0b..2f8163adc72 100644
--- a/pkgs/desktops/gnome-3/apps/accerciser/default.nix
+++ b/pkgs/desktops/gnome-3/apps/accerciser/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , fetchurl
 , pkg-config
 , gnome3
diff --git a/pkgs/desktops/gnome-3/apps/gnome-music/default.nix b/pkgs/desktops/gnome-3/apps/gnome-music/default.nix
index fc0ee5d38ff..be456071e41 100644
--- a/pkgs/desktops/gnome-3/apps/gnome-music/default.nix
+++ b/pkgs/desktops/gnome-3/apps/gnome-music/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , meson
 , ninja
 , gettext
diff --git a/pkgs/desktops/gnome-3/core/gnome-tour/default.nix b/pkgs/desktops/gnome-3/core/gnome-tour/default.nix
index 26d7593038b..2b84442620d 100644
--- a/pkgs/desktops/gnome-3/core/gnome-tour/default.nix
+++ b/pkgs/desktops/gnome-3/core/gnome-tour/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , rustPlatform
 , gettext
 , meson
diff --git a/pkgs/desktops/lumina/lumina-calculator/default.nix b/pkgs/desktops/lumina/lumina-calculator/default.nix
index 05d80997b76..d0f09bbfae2 100644
--- a/pkgs/desktops/lumina/lumina-calculator/default.nix
+++ b/pkgs/desktops/lumina/lumina-calculator/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, mkDerivation, fetchFromGitHub, qmake, qtbase, qttools }:
+{ lib, mkDerivation, fetchFromGitHub, qmake, qtbase, qttools }:
 
 mkDerivation rec {
   pname = "lumina-calculator";
diff --git a/pkgs/desktops/lumina/lumina-pdf/default.nix b/pkgs/desktops/lumina/lumina-pdf/default.nix
index 8d975c749d6..679dfa65b5a 100644
--- a/pkgs/desktops/lumina/lumina-pdf/default.nix
+++ b/pkgs/desktops/lumina/lumina-pdf/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, mkDerivation, fetchFromGitHub, qmake, qtbase, qttools, poppler }:
+{ lib, mkDerivation, fetchFromGitHub, qmake, qtbase, qttools, poppler }:
 
 mkDerivation rec {
   pname = "lumina-pdf";
diff --git a/pkgs/desktops/lumina/lumina/default.nix b/pkgs/desktops/lumina/lumina/default.nix
index 4daaf15534c..d31f16e235a 100644
--- a/pkgs/desktops/lumina/lumina/default.nix
+++ b/pkgs/desktops/lumina/lumina/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , mkDerivation
 , fetchFromGitHub
 , fluxbox
diff --git a/pkgs/desktops/mate/mate-tweak/default.nix b/pkgs/desktops/mate/mate-tweak/default.nix
index 316a72a09c7..ce97bc416e6 100644
--- a/pkgs/desktops/mate/mate-tweak/default.nix
+++ b/pkgs/desktops/mate/mate-tweak/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , fetchFromGitHub
 , python3Packages
 , intltool
diff --git a/pkgs/desktops/mate/mozo/default.nix b/pkgs/desktops/mate/mozo/default.nix
index cee4261a77d..4d893cd2e74 100644
--- a/pkgs/desktops/mate/mozo/default.nix
+++ b/pkgs/desktops/mate/mozo/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python3, fetchurl, pkg-config, gettext, mate, gtk3, glib, wrapGAppsHook, gobject-introspection }:
+{ lib, python3, fetchurl, pkg-config, gettext, mate, gtk3, glib, wrapGAppsHook, gobject-introspection }:
 
 python3.pkgs.buildPythonApplication rec {
   pname = "mozo";
diff --git a/pkgs/desktops/pantheon/desktop/elementary-gsettings-schemas/default.nix b/pkgs/desktops/pantheon/desktop/elementary-gsettings-schemas/default.nix
index 40ac23ca7f1..bfe95e0be46 100644
--- a/pkgs/desktops/pantheon/desktop/elementary-gsettings-schemas/default.nix
+++ b/pkgs/desktops/pantheon/desktop/elementary-gsettings-schemas/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , runCommand
 , mutter
 , elementary-default-settings
diff --git a/pkgs/desktops/xfce/applications/catfish/default.nix b/pkgs/desktops/xfce/applications/catfish/default.nix
index 85f823221b7..e47f1dea3f6 100644
--- a/pkgs/desktops/xfce/applications/catfish/default.nix
+++ b/pkgs/desktops/xfce/applications/catfish/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, file, which, intltool, gobject-introspection,
+{ lib, fetchurl, file, which, intltool, gobject-introspection,
   findutils, xdg_utils, dconf, gtk3, python3Packages,
   wrapGAppsHook
 }:
diff --git a/pkgs/desktops/xfce/panel-plugins/xfce4-datetime-plugin/default.nix b/pkgs/desktops/xfce/panel-plugins/xfce4-datetime-plugin/default.nix
index aa14c878b12..304b9d9076d 100644
--- a/pkgs/desktops/xfce/panel-plugins/xfce4-datetime-plugin/default.nix
+++ b/pkgs/desktops/xfce/panel-plugins/xfce4-datetime-plugin/default.nix
@@ -1,5 +1,5 @@
 { mkXfceDerivation
-, lib, stdenv
+, lib
 , intltool
 , libxfce4ui
 , xfce4-panel
diff --git a/pkgs/desktops/xfce/thunar-plugins/archive/default.nix b/pkgs/desktops/xfce/thunar-plugins/archive/default.nix
index 985b067a02f..c46b5a0fd1b 100644
--- a/pkgs/desktops/xfce/thunar-plugins/archive/default.nix
+++ b/pkgs/desktops/xfce/thunar-plugins/archive/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , mkXfceDerivation
 , gtk3
 , thunar
diff --git a/pkgs/development/arduino/ino/default.nix b/pkgs/development/arduino/ino/default.nix
index c536ed8c2c0..822cfb0e361 100644
--- a/pkgs/development/arduino/ino/default.nix
+++ b/pkgs/development/arduino/ino/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, fetchurl, python2Packages, picocom
+{ lib, fetchurl, python2Packages, picocom
 , avrdude, arduino-core }:
 
 python2Packages.buildPythonApplication rec {
diff --git a/pkgs/development/beam-modules/build-hex.nix b/pkgs/development/beam-modules/build-hex.nix
index e0d9dfc4288..1ebe3760ec8 100644
--- a/pkgs/development/beam-modules/build-hex.nix
+++ b/pkgs/development/beam-modules/build-hex.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildRebar3, fetchHex }:
+{ lib, buildRebar3, fetchHex }:
 
 { name, version, sha256
 , builder ? buildRebar3
diff --git a/pkgs/development/beam-modules/default.nix b/pkgs/development/beam-modules/default.nix
index 4f312129b38..570155e4d1a 100644
--- a/pkgs/development/beam-modules/default.nix
+++ b/pkgs/development/beam-modules/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, pkgs, erlang }:
+{ lib, pkgs, erlang }:
 
 let
   inherit (lib) makeExtensible;
diff --git a/pkgs/development/beam-modules/lib.nix b/pkgs/development/beam-modules/lib.nix
index 7ae2e0e2606..1b021cf9347 100644
--- a/pkgs/development/beam-modules/lib.nix
+++ b/pkgs/development/beam-modules/lib.nix
@@ -1,4 +1,4 @@
-{ pkgs, lib, stdenv }:
+{ pkgs, lib }:
 
 rec {
 
diff --git a/pkgs/development/compilers/carp/default.nix b/pkgs/development/compilers/carp/default.nix
index 0299c179775..b0a14534b08 100644
--- a/pkgs/development/compilers/carp/default.nix
+++ b/pkgs/development/compilers/carp/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, makeWrapper, clang, haskellPackages }:
+{ lib, fetchFromGitHub, makeWrapper, clang, haskellPackages }:
 
 haskellPackages.mkDerivation rec {
 
diff --git a/pkgs/development/compilers/chicken/4/egg2nix.nix b/pkgs/development/compilers/chicken/4/egg2nix.nix
index 2775666f14c..d2f2805ed7f 100644
--- a/pkgs/development/compilers/chicken/4/egg2nix.nix
+++ b/pkgs/development/compilers/chicken/4/egg2nix.nix
@@ -1,4 +1,4 @@
-{ stdenv, eggDerivation, fetchurl, chickenEggs }:
+{ eggDerivation, fetchurl, chickenEggs }:
 
 # Note: This mostly reimplements the default.nix already contained in
 # the tarball. Is there a nicer way than duplicating code?
diff --git a/pkgs/development/compilers/chicken/4/eggs.nix b/pkgs/development/compilers/chicken/4/eggs.nix
index 6e6f104f8a0..8c96caca262 100644
--- a/pkgs/development/compilers/chicken/4/eggs.nix
+++ b/pkgs/development/compilers/chicken/4/eggs.nix
@@ -1,4 +1,4 @@
-{ pkgs, stdenv }:
+{ pkgs }:
 rec {
   inherit (pkgs) eggDerivation fetchegg;
 
diff --git a/pkgs/development/compilers/chicken/5/egg2nix.nix b/pkgs/development/compilers/chicken/5/egg2nix.nix
index 69e8d9e62c3..62b634eb637 100644
--- a/pkgs/development/compilers/chicken/5/egg2nix.nix
+++ b/pkgs/development/compilers/chicken/5/egg2nix.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, eggDerivation, fetchFromGitHub, chickenEggs }:
+{ lib, eggDerivation, fetchFromGitHub, chickenEggs }:
 
 # Note: This mostly reimplements the default.nix already contained in
 # the tarball. Is there a nicer way than duplicating code?
diff --git a/pkgs/development/compilers/chicken/5/eggs.nix b/pkgs/development/compilers/chicken/5/eggs.nix
index 3c4ae74c1e6..1c1377350d2 100644
--- a/pkgs/development/compilers/chicken/5/eggs.nix
+++ b/pkgs/development/compilers/chicken/5/eggs.nix
@@ -1,4 +1,4 @@
-{ pkgs, stdenv }:
+{ pkgs }:
 rec {
   inherit (pkgs) eggDerivation fetchegg;
 
diff --git a/pkgs/development/compilers/elm/packages/elm-format.nix b/pkgs/development/compilers/elm/packages/elm-format.nix
index 71386e00ef1..b2f655d4f1c 100644
--- a/pkgs/development/compilers/elm/packages/elm-format.nix
+++ b/pkgs/development/compilers/elm/packages/elm-format.nix
@@ -1,7 +1,7 @@
 { mkDerivation, fetchgit, ansi-terminal, ansi-wl-pprint, array, base, binary
 , bytestring, cmark, containers, directory, filepath, free, HUnit
 , indents, json, mtl, optparse-applicative, parsec, process
-, QuickCheck, quickcheck-io, split, lib, stdenv, tasty, tasty-golden
+, QuickCheck, quickcheck-io, split, lib, tasty, tasty-golden
 , tasty-hunit, tasty-quickcheck, text
 }:
 mkDerivation {
diff --git a/pkgs/development/compilers/elm/packages/elm-instrument.nix b/pkgs/development/compilers/elm/packages/elm-instrument.nix
index cd13eb4de4f..cf0ba2303e1 100644
--- a/pkgs/development/compilers/elm/packages/elm-instrument.nix
+++ b/pkgs/development/compilers/elm/packages/elm-instrument.nix
@@ -2,7 +2,7 @@
 , bytestring, Cabal, cmark, containers, directory, elm-format
 , fetchgit, filepath, free, HUnit, indents, json, mtl
 , optparse-applicative, parsec, process, QuickCheck, quickcheck-io
-, split, lib, stdenv, tasty, tasty-golden, tasty-hunit, tasty-quickcheck
+, split, lib, tasty, tasty-golden, tasty-hunit, tasty-quickcheck
 , text
 }:
 mkDerivation {
diff --git a/pkgs/development/compilers/elm/packages/elm.nix b/pkgs/development/compilers/elm/packages/elm.nix
index edb2ed6ed7a..c012d59d8ae 100644
--- a/pkgs/development/compilers/elm/packages/elm.nix
+++ b/pkgs/development/compilers/elm/packages/elm.nix
@@ -3,7 +3,7 @@
 , file-embed, filelock, filepath, ghc-prim, haskeline, HTTP
 , http-client, http-client-tls, http-types, language-glsl, mtl
 , network, parsec, process, raw-strings-qq, scientific, SHA
-, snap-core, snap-server, lib, stdenv, template-haskell, time
+, snap-core, snap-server, lib, template-haskell, time
 , unordered-containers, utf8-string, vector, zip-archive
 }:
 mkDerivation {
diff --git a/pkgs/development/compilers/elm/packages/elmi-to-json.nix b/pkgs/development/compilers/elm/packages/elmi-to-json.nix
index 6788fce6a99..3362ce5cc7a 100644
--- a/pkgs/development/compilers/elm/packages/elmi-to-json.nix
+++ b/pkgs/development/compilers/elm/packages/elmi-to-json.nix
@@ -1,6 +1,6 @@
 { mkDerivation, aeson, base, binary, bytestring, containers
 , directory, fetchgit, filepath, ghc-prim, hpack
-, optparse-applicative, lib, stdenv, text, unliftio
+, optparse-applicative, lib, text, unliftio
 , unordered-containers
 }:
 mkDerivation {
diff --git a/pkgs/development/compilers/elm/packages/indents.nix b/pkgs/development/compilers/elm/packages/indents.nix
index 80f3c08d9e3..d196e8d0fbf 100644
--- a/pkgs/development/compilers/elm/packages/indents.nix
+++ b/pkgs/development/compilers/elm/packages/indents.nix
@@ -1,4 +1,4 @@
-{ mkDerivation, base, concatenative, mtl, parsec, lib, stdenv }:
+{ mkDerivation, base, concatenative, mtl, parsec, lib }:
 mkDerivation {
   pname = "indents";
   version = "0.3.3";
diff --git a/pkgs/development/compilers/ghcjs-ng/ghcjs-base.nix b/pkgs/development/compilers/ghcjs-ng/ghcjs-base.nix
index 82c37bd8617..54a60b50372 100644
--- a/pkgs/development/compilers/ghcjs-ng/ghcjs-base.nix
+++ b/pkgs/development/compilers/ghcjs-ng/ghcjs-base.nix
@@ -1,7 +1,7 @@
 { mkDerivation, aeson, array, attoparsec, base, binary, bytestring
 , containers, deepseq, directory, dlist, fetchgit, ghc-prim
 , ghcjs-prim, hashable, HUnit, integer-gmp, primitive, QuickCheck
-, quickcheck-unicode, random, scientific, stdenv, test-framework
+, quickcheck-unicode, random, scientific, test-framework
 , test-framework-hunit, test-framework-quickcheck2, text, time
 , transformers, unordered-containers, vector
 }:
diff --git a/pkgs/development/compilers/ios-cross-compile/9.2.nix b/pkgs/development/compilers/ios-cross-compile/9.2.nix
index cabdbd9dcc0..688ca15177a 100644
--- a/pkgs/development/compilers/ios-cross-compile/9.2.nix
+++ b/pkgs/development/compilers/ios-cross-compile/9.2.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, git, clang,
+{ lib, git, clang,
   fetchFromGitHub, requireFile,
   openssl, xz, gnutar,
   automake, autoconf, libtool, clangStdenv } :
diff --git a/pkgs/development/compilers/jetbrains-jdk/default.nix b/pkgs/development/compilers/jetbrains-jdk/default.nix
index 2edf93b7fc0..3b5465ac9c3 100644
--- a/pkgs/development/compilers/jetbrains-jdk/default.nix
+++ b/pkgs/development/compilers/jetbrains-jdk/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, openjdk11, fetchFromGitHub, jetbrains }:
+{ lib, openjdk11, fetchFromGitHub, jetbrains }:
 
 openjdk11.overrideAttrs (oldAttrs: rec {
   pname = "jetbrains-jdk";
diff --git a/pkgs/development/compilers/meta-environment/meta-build-env/default.nix b/pkgs/development/compilers/meta-environment/meta-build-env/default.nix
index 34d8f98970e..454156c2d28 100644
--- a/pkgs/development/compilers/meta-environment/meta-build-env/default.nix
+++ b/pkgs/development/compilers/meta-environment/meta-build-env/default.nix
@@ -1,4 +1,6 @@
-{lib, stdenv, fetchurl}: stdenv.mkDerivation {
+{ lib, stdenv, fetchurl }:
+
+stdenv.mkDerivation {
   name = "meta-build-env-0.1";
   src = fetchurl {
     url = "http://www.meta-environment.org/releases/meta-build-env-0.1.tar.gz";
diff --git a/pkgs/development/compilers/osl/default.nix b/pkgs/development/compilers/osl/default.nix
index d3de5cad2f6..10067644813 100644
--- a/pkgs/development/compilers/osl/default.nix
+++ b/pkgs/development/compilers/osl/default.nix
@@ -1,4 +1,4 @@
-{ clangStdenv, lib, stdenv, fetchFromGitHub, cmake, zlib, openexr,
+{ clangStdenv, lib, fetchFromGitHub, cmake, zlib, openexr,
 openimageio, llvm, boost165, flex, bison, partio, pugixml,
 util-linux, python
 }:
diff --git a/pkgs/development/compilers/pakcs/curry-base.nix b/pkgs/development/compilers/pakcs/curry-base.nix
index 660a4f2de40..c461d2caa93 100644
--- a/pkgs/development/compilers/pakcs/curry-base.nix
+++ b/pkgs/development/compilers/pakcs/curry-base.nix
@@ -1,5 +1,5 @@
 { mkDerivation, base, Cabal, containers, directory, extra, filepath
-, mtl, parsec, pretty, lib, stdenv, time, transformers
+, mtl, parsec, pretty, lib, time, transformers
 }:
 mkDerivation {
   pname = "curry-base";
diff --git a/pkgs/development/compilers/pakcs/curry-frontend.nix b/pkgs/development/compilers/pakcs/curry-frontend.nix
index 8fd1645ee70..88e88487594 100644
--- a/pkgs/development/compilers/pakcs/curry-frontend.nix
+++ b/pkgs/development/compilers/pakcs/curry-frontend.nix
@@ -1,6 +1,6 @@
 { mkDerivation, base, bytestring, Cabal, containers, curry-base
 , directory, extra, file-embed, filepath, mtl, network-uri, pretty
-, process, set-extra, lib, stdenv, template-haskell, transformers
+, process, set-extra, lib, template-haskell, transformers
 }:
 mkDerivation {
   pname = "curry-frontend";
diff --git a/pkgs/development/compilers/vyper/default.nix b/pkgs/development/compilers/vyper/default.nix
index 79702c01bee..81ee04edf08 100644
--- a/pkgs/development/compilers/vyper/default.nix
+++ b/pkgs/development/compilers/vyper/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, buildPythonPackage, fetchPypi, writeText, asttokens
+{ lib, buildPythonPackage, fetchPypi, writeText, asttokens
 , pycryptodome, pytest_xdist, pytestcov, recommonmark, semantic-version, sphinx
 , sphinx_rtd_theme, pytestrunner }:
 
diff --git a/pkgs/development/idris-modules/tfrandom.nix b/pkgs/development/idris-modules/tfrandom.nix
index 5c631950312..8249259075c 100644
--- a/pkgs/development/idris-modules/tfrandom.nix
+++ b/pkgs/development/idris-modules/tfrandom.nix
@@ -1,8 +1,8 @@
-{ stdenv
+{ lib
 , build-idris-package
 , fetchFromGitHub
-, lib
 }:
+
 build-idris-package  {
   name = "tf-random";
   version = "2020-01-15";
diff --git a/pkgs/development/idris-modules/with-packages.nix b/pkgs/development/idris-modules/with-packages.nix
index 72b9067b691..080cbe2778a 100644
--- a/pkgs/development/idris-modules/with-packages.nix
+++ b/pkgs/development/idris-modules/with-packages.nix
@@ -1,6 +1,6 @@
 # Build a version of idris with a set of packages visible
 # packages: The packages visible to idris
-{ stdenv, lib, idris, symlinkJoin, makeWrapper }: packages:
+{ lib, idris, symlinkJoin, makeWrapper }: packages:
 
 let paths = lib.closePropagation packages;
 in
diff --git a/pkgs/development/interpreters/hy/default.nix b/pkgs/development/interpreters/hy/default.nix
index 6bfef26b4dd..e39bf915cfc 100644
--- a/pkgs/development/interpreters/hy/default.nix
+++ b/pkgs/development/interpreters/hy/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python3Packages }:
+{ lib, python3Packages }:
 
 python3Packages.buildPythonApplication rec {
   pname = "hy";
diff --git a/pkgs/development/interpreters/joker/default.nix b/pkgs/development/interpreters/joker/default.nix
index 3d36dde8e0f..004d2732f3a 100644
--- a/pkgs/development/interpreters/joker/default.nix
+++ b/pkgs/development/interpreters/joker/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "joker";
diff --git a/pkgs/development/interpreters/lfe/generic-builder.nix b/pkgs/development/interpreters/lfe/generic-builder.nix
index d6090152d15..895054fac46 100644
--- a/pkgs/development/interpreters/lfe/generic-builder.nix
+++ b/pkgs/development/interpreters/lfe/generic-builder.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, erlang, makeWrapper, coreutils, bash, buildRebar3, buildHex }:
+{ lib, fetchFromGitHub, erlang, makeWrapper, coreutils, bash, buildRebar3, buildHex }:
 
 { baseName ? "lfe"
 , version
diff --git a/pkgs/development/interpreters/perl/wrapper.nix b/pkgs/development/interpreters/perl/wrapper.nix
index 865d8fde9ea..da95b5a8964 100644
--- a/pkgs/development/interpreters/perl/wrapper.nix
+++ b/pkgs/development/interpreters/perl/wrapper.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, perl, buildEnv, makeWrapper
+{ lib, perl, buildEnv, makeWrapper
 , extraLibs ? []
 , extraOutputsToInstall ? []
 , postBuild ? ""
diff --git a/pkgs/development/interpreters/pyrex/0.9.5.nix b/pkgs/development/interpreters/pyrex/0.9.5.nix
index 668adf2c44a..a9c71c6fcf7 100644
--- a/pkgs/development/interpreters/pyrex/0.9.5.nix
+++ b/pkgs/development/interpreters/pyrex/0.9.5.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, python2Packages }:
+{ lib, fetchurl, python2Packages }:
 
 let version = "0.9.5.1.1"; in
 
diff --git a/pkgs/development/interpreters/pyrex/0.9.6.nix b/pkgs/development/interpreters/pyrex/0.9.6.nix
index 2c4c74baecf..12429c05fe6 100644
--- a/pkgs/development/interpreters/pyrex/0.9.6.nix
+++ b/pkgs/development/interpreters/pyrex/0.9.6.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, python2Packages }:
+{ lib, fetchurl, python2Packages }:
 
 let version = "0.9.6.4"; in
 
diff --git a/pkgs/development/java-modules/build-maven-package.nix b/pkgs/development/java-modules/build-maven-package.nix
index cb895d9c672..432f972b0ff 100644
--- a/pkgs/development/java-modules/build-maven-package.nix
+++ b/pkgs/development/java-modules/build-maven-package.nix
@@ -5,7 +5,7 @@ with builtins;
 with lib;
 
 let
-  mavenMinimal = import ./maven-minimal.nix { inherit lib pkgs stdenv; };
+  mavenMinimal = import ./maven-minimal.nix { inherit lib pkgs ; };
 in stdenv.mkDerivation rec {
   inherit mavenDeps src name meta m2Path;
 
diff --git a/pkgs/development/java-modules/junit/default.nix b/pkgs/development/java-modules/junit/default.nix
index c4b02071ec0..2cb9ab001c2 100644
--- a/pkgs/development/java-modules/junit/default.nix
+++ b/pkgs/development/java-modules/junit/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, pkgs, mavenbuild, fetchMaven }:
+{ lib, pkgs, mavenbuild, fetchMaven }:
 
 with pkgs.javaPackages;
 
diff --git a/pkgs/development/java-modules/maven-hello/default.nix b/pkgs/development/java-modules/maven-hello/default.nix
index e0087e857a4..eac127b6dcc 100644
--- a/pkgs/development/java-modules/maven-hello/default.nix
+++ b/pkgs/development/java-modules/maven-hello/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, pkgs, mavenbuild }:
+{ lib, pkgs, mavenbuild }:
 
 with pkgs.javaPackages;
 
diff --git a/pkgs/development/java-modules/maven-minimal.nix b/pkgs/development/java-modules/maven-minimal.nix
index 9019e3ba28e..d966a75bb9d 100644
--- a/pkgs/development/java-modules/maven-minimal.nix
+++ b/pkgs/development/java-modules/maven-minimal.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, pkgs }:
+{ lib, pkgs }:
 
 with lib;
 with pkgs.javaPackages;
diff --git a/pkgs/development/libraries/agda/agda-prelude/default.nix b/pkgs/development/libraries/agda/agda-prelude/default.nix
index 79bb783cc9f..21883acd195 100644
--- a/pkgs/development/libraries/agda/agda-prelude/default.nix
+++ b/pkgs/development/libraries/agda/agda-prelude/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, mkDerivation, fetchFromGitHub }:
+{ lib, mkDerivation, fetchFromGitHub }:
 
 mkDerivation rec {
   version = "compat-2.6.1";
diff --git a/pkgs/development/libraries/agda/functional-linear-algebra/default.nix b/pkgs/development/libraries/agda/functional-linear-algebra/default.nix
index 7ec892bfe02..ce4deb5b519 100644
--- a/pkgs/development/libraries/agda/functional-linear-algebra/default.nix
+++ b/pkgs/development/libraries/agda/functional-linear-algebra/default.nix
@@ -1,4 +1,4 @@
-{ fetchFromGitHub, lib, stdenv, mkDerivation, standard-library }:
+{ fetchFromGitHub, lib, mkDerivation, standard-library }:
 
 mkDerivation rec {
   version = "0.1";
diff --git a/pkgs/development/libraries/agda/iowa-stdlib/default.nix b/pkgs/development/libraries/agda/iowa-stdlib/default.nix
index 2ebb3f66ed0..1383cff9e55 100644
--- a/pkgs/development/libraries/agda/iowa-stdlib/default.nix
+++ b/pkgs/development/libraries/agda/iowa-stdlib/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, mkDerivation, fetchFromGitHub }:
+{ lib, mkDerivation, fetchFromGitHub }:
 
 mkDerivation (rec {
   version = "1.5.0";
diff --git a/pkgs/development/libraries/agda/standard-library/default.nix b/pkgs/development/libraries/agda/standard-library/default.nix
index 1d8dc03bbde..c0b0287d897 100644
--- a/pkgs/development/libraries/agda/standard-library/default.nix
+++ b/pkgs/development/libraries/agda/standard-library/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, mkDerivation, fetchFromGitHub, ghcWithPackages }:
+{ lib, mkDerivation, fetchFromGitHub, ghcWithPackages }:
 
 mkDerivation rec {
   pname = "standard-library";
diff --git a/pkgs/development/libraries/appstream/qt.nix b/pkgs/development/libraries/appstream/qt.nix
index c9fc96b3251..9ae1cce684a 100644
--- a/pkgs/development/libraries/appstream/qt.nix
+++ b/pkgs/development/libraries/appstream/qt.nix
@@ -1,4 +1,4 @@
-{ stdenv, mkDerivation, appstream, qtbase, qttools }:
+{ mkDerivation, appstream, qtbase, qttools }:
 
 # TODO: look into using the libraries from the regular appstream derivation as we keep duplicates here
 
diff --git a/pkgs/development/libraries/boost/1.59.nix b/pkgs/development/libraries/boost/1.59.nix
index fb65e49c500..0f6e9a35b6e 100644
--- a/pkgs/development/libraries/boost/1.59.nix
+++ b/pkgs/development/libraries/boost/1.59.nix
@@ -1,4 +1,4 @@
-{ stdenv, callPackage, fetchurl, ... } @ args:
+{ callPackage, fetchurl, ... } @ args:
 
 callPackage ./generic.nix (args // {
   version = "1.59.0";
diff --git a/pkgs/development/libraries/boost/1.60.nix b/pkgs/development/libraries/boost/1.60.nix
index 646f4652f77..4bc7a1cc732 100644
--- a/pkgs/development/libraries/boost/1.60.nix
+++ b/pkgs/development/libraries/boost/1.60.nix
@@ -1,4 +1,4 @@
-{ stdenv, callPackage, fetchurl, ... } @ args:
+{ callPackage, fetchurl, ... } @ args:
 
 callPackage ./generic.nix (args // {
   version = "1.60.0";
diff --git a/pkgs/development/libraries/boost/1.65.nix b/pkgs/development/libraries/boost/1.65.nix
index 922c09ba7fe..764f38d5b74 100644
--- a/pkgs/development/libraries/boost/1.65.nix
+++ b/pkgs/development/libraries/boost/1.65.nix
@@ -1,4 +1,4 @@
-{ stdenv, callPackage, fetchurl, ... } @ args:
+{ callPackage, fetchurl, ... } @ args:
 
 callPackage ./generic.nix (args // {
   version = "1.65.1";
diff --git a/pkgs/development/libraries/boost/1.66.nix b/pkgs/development/libraries/boost/1.66.nix
index 0a99717a799..af61aa51944 100644
--- a/pkgs/development/libraries/boost/1.66.nix
+++ b/pkgs/development/libraries/boost/1.66.nix
@@ -1,4 +1,4 @@
-{ stdenv, callPackage, fetchurl, ... } @ args:
+{ callPackage, fetchurl, ... } @ args:
 
 callPackage ./generic.nix (args // {
   version = "1.66.0";
diff --git a/pkgs/development/libraries/boost/1.68.nix b/pkgs/development/libraries/boost/1.68.nix
index 4d98172c6d0..920dd9a300b 100644
--- a/pkgs/development/libraries/boost/1.68.nix
+++ b/pkgs/development/libraries/boost/1.68.nix
@@ -1,4 +1,4 @@
-{ stdenv, callPackage, fetchurl, fetchpatch, ... } @ args:
+{ callPackage, fetchurl, fetchpatch, ... } @ args:
 
 callPackage ./generic.nix (args // {
   version = "1.68.0";
diff --git a/pkgs/development/libraries/boost/1.69.nix b/pkgs/development/libraries/boost/1.69.nix
index 95c4aa854a4..7292356ecd1 100644
--- a/pkgs/development/libraries/boost/1.69.nix
+++ b/pkgs/development/libraries/boost/1.69.nix
@@ -1,4 +1,4 @@
-{ stdenv, callPackage, fetchurl, fetchpatch, ... } @ args:
+{ callPackage, fetchurl, fetchpatch, ... } @ args:
 
 callPackage ./generic.nix (args // {
   version = "1.69.0";
diff --git a/pkgs/development/libraries/boost/1.70.nix b/pkgs/development/libraries/boost/1.70.nix
index 45a8bdb9318..3b898cfc0ae 100644
--- a/pkgs/development/libraries/boost/1.70.nix
+++ b/pkgs/development/libraries/boost/1.70.nix
@@ -1,4 +1,4 @@
-{ stdenv, callPackage, fetchurl, fetchpatch, ... } @ args:
+{ callPackage, fetchurl, fetchpatch, ... } @ args:
 
 callPackage ./generic.nix (args // {
   version = "1.70.0";
diff --git a/pkgs/development/libraries/boost/1.71.nix b/pkgs/development/libraries/boost/1.71.nix
index 7b128e25bb6..bec741dd88a 100644
--- a/pkgs/development/libraries/boost/1.71.nix
+++ b/pkgs/development/libraries/boost/1.71.nix
@@ -1,4 +1,4 @@
-{ stdenv, callPackage, fetchurl, fetchpatch, ... } @ args:
+{ callPackage, fetchurl, fetchpatch, ... } @ args:
 
 callPackage ./generic.nix (args // rec {
   version = "1.71.0";
diff --git a/pkgs/development/libraries/boost/1.72.nix b/pkgs/development/libraries/boost/1.72.nix
index 680afe8bcb8..97dad9b6c8a 100644
--- a/pkgs/development/libraries/boost/1.72.nix
+++ b/pkgs/development/libraries/boost/1.72.nix
@@ -1,4 +1,4 @@
-{ stdenv, callPackage, fetchurl, fetchpatch, ... } @ args:
+{ callPackage, fetchurl, fetchpatch, ... } @ args:
 
 callPackage ./generic.nix (args // rec {
   version = "1.72.0";
diff --git a/pkgs/development/libraries/boost/1.73.nix b/pkgs/development/libraries/boost/1.73.nix
index 99a5486f197..289bea197c3 100644
--- a/pkgs/development/libraries/boost/1.73.nix
+++ b/pkgs/development/libraries/boost/1.73.nix
@@ -1,4 +1,4 @@
-{ stdenv, callPackage, fetchurl, fetchpatch, ... } @ args:
+{ callPackage, fetchurl, fetchpatch, ... } @ args:
 
 callPackage ./generic.nix (args // rec {
   version = "1.73.0";
diff --git a/pkgs/development/libraries/boost/1.74.nix b/pkgs/development/libraries/boost/1.74.nix
index 35b4013dcb3..a181ed94c26 100644
--- a/pkgs/development/libraries/boost/1.74.nix
+++ b/pkgs/development/libraries/boost/1.74.nix
@@ -1,4 +1,4 @@
-{ stdenv, callPackage, fetchurl, fetchpatch, ... } @ args:
+{ callPackage, fetchurl, fetchpatch, ... } @ args:
 
 callPackage ./generic.nix (args // rec {
   version = "1.74.0";
diff --git a/pkgs/development/libraries/boost/1.75.nix b/pkgs/development/libraries/boost/1.75.nix
index 9912032c777..ff1073bd026 100644
--- a/pkgs/development/libraries/boost/1.75.nix
+++ b/pkgs/development/libraries/boost/1.75.nix
@@ -1,4 +1,4 @@
-{ stdenv, callPackage, fetchurl, fetchpatch, ... } @ args:
+{ callPackage, fetchurl, fetchpatch, ... } @ args:
 
 callPackage ./generic.nix (args // rec {
   version = "1.75.0";
diff --git a/pkgs/development/libraries/cxxtest/default.nix b/pkgs/development/libraries/cxxtest/default.nix
index 1a828cc451d..3469cda3fc7 100644
--- a/pkgs/development/libraries/cxxtest/default.nix
+++ b/pkgs/development/libraries/cxxtest/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonApplication, fetchFromGitHub }:
+{ lib, buildPythonApplication, fetchFromGitHub }:
 
 buildPythonApplication rec {
   pname = "cxxtest";
diff --git a/pkgs/development/libraries/ffmpeg/3.4.nix b/pkgs/development/libraries/ffmpeg/3.4.nix
index 629fdba5673..be341d588c1 100644
--- a/pkgs/development/libraries/ffmpeg/3.4.nix
+++ b/pkgs/development/libraries/ffmpeg/3.4.nix
@@ -1,4 +1,4 @@
-{ stdenv, callPackage, fetchpatch
+{ callPackage, fetchpatch
 # Darwin frameworks
 , Cocoa, CoreMedia
 , ...
diff --git a/pkgs/development/libraries/ffmpeg/4.nix b/pkgs/development/libraries/ffmpeg/4.nix
index 7e3941d3f37..2cc409fc037 100644
--- a/pkgs/development/libraries/ffmpeg/4.nix
+++ b/pkgs/development/libraries/ffmpeg/4.nix
@@ -1,4 +1,4 @@
-{ stdenv, callPackage, fetchpatch
+{ callPackage, fetchpatch
 # Darwin frameworks
 , Cocoa, CoreMedia, VideoToolbox
 , ...
diff --git a/pkgs/development/libraries/java/junit/default.nix b/pkgs/development/libraries/java/junit/default.nix
index 1695d11cb25..5a107985177 100644
--- a/pkgs/development/libraries/java/junit/default.nix
+++ b/pkgs/development/libraries/java/junit/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, antBuild, fetchgit, perl }:
+{ lib, antBuild, fetchgit, perl }:
 
 let
   version = "4.11";
diff --git a/pkgs/development/libraries/libcollectdclient/default.nix b/pkgs/development/libraries/libcollectdclient/default.nix
index df8db3ac9f8..0bf654ee963 100644
--- a/pkgs/development/libraries/libcollectdclient/default.nix
+++ b/pkgs/development/libraries/libcollectdclient/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, collectd }:
+{ lib, collectd }:
 with lib;
 
 collectd.overrideAttrs (oldAttrs: {
diff --git a/pkgs/development/libraries/libmicrohttpd/0.9.70.nix b/pkgs/development/libraries/libmicrohttpd/0.9.70.nix
index 1cd04b0b277..c0321e327c5 100644
--- a/pkgs/development/libraries/libmicrohttpd/0.9.70.nix
+++ b/pkgs/development/libraries/libmicrohttpd/0.9.70.nix
@@ -1,4 +1,4 @@
-{ stdenv, callPackage, fetchurl }:
+{ callPackage, fetchurl }:
 
 callPackage ./generic.nix ( rec {
   version = "0.9.70";
diff --git a/pkgs/development/libraries/libmicrohttpd/0.9.71.nix b/pkgs/development/libraries/libmicrohttpd/0.9.71.nix
index 74bd6cce42c..7e60f8c7272 100644
--- a/pkgs/development/libraries/libmicrohttpd/0.9.71.nix
+++ b/pkgs/development/libraries/libmicrohttpd/0.9.71.nix
@@ -1,4 +1,4 @@
-{ stdenv, callPackage, fetchurl }:
+{ callPackage, fetchurl }:
 
 callPackage ./generic.nix ( rec {
   version = "0.9.71";
diff --git a/pkgs/development/libraries/libmicrohttpd/0.9.72.nix b/pkgs/development/libraries/libmicrohttpd/0.9.72.nix
index 8eeb94cdc29..4c695218184 100644
--- a/pkgs/development/libraries/libmicrohttpd/0.9.72.nix
+++ b/pkgs/development/libraries/libmicrohttpd/0.9.72.nix
@@ -1,4 +1,4 @@
-{ stdenv, callPackage, fetchurl }:
+{ callPackage, fetchurl }:
 
 callPackage ./generic.nix ( rec {
   version = "0.9.72";
diff --git a/pkgs/development/libraries/lief/default.nix b/pkgs/development/libraries/lief/default.nix
index 3b57d0c2f7a..953eee3b8bd 100644
--- a/pkgs/development/libraries/lief/default.nix
+++ b/pkgs/development/libraries/lief/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchzip }:
+{ lib, fetchzip }:
 
 fetchzip {
   url = "https://github.com/lief-project/LIEF/releases/download/0.9.0/LIEF-0.9.0-Linux.tar.gz";
diff --git a/pkgs/development/libraries/mlt/qt-5.nix b/pkgs/development/libraries/mlt/qt-5.nix
index 7004a5e11c0..7434383e165 100644
--- a/pkgs/development/libraries/mlt/qt-5.nix
+++ b/pkgs/development/libraries/mlt/qt-5.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , fetchFromGitHub
 , SDL
 , ffmpeg
diff --git a/pkgs/development/libraries/packr/default.nix b/pkgs/development/libraries/packr/default.nix
index 7bf0cb2c5fb..e3abc6e5d62 100644
--- a/pkgs/development/libraries/packr/default.nix
+++ b/pkgs/development/libraries/packr/default.nix
@@ -1,7 +1,7 @@
 { buildGoModule
 , fetchFromGitHub
 , lib
-, stdenv
+
 , symlinkJoin
 }:
 
diff --git a/pkgs/development/libraries/pkger/default.nix b/pkgs/development/libraries/pkger/default.nix
index 4d7c682f022..f2e984c8c81 100644
--- a/pkgs/development/libraries/pkger/default.nix
+++ b/pkgs/development/libraries/pkger/default.nix
@@ -1,7 +1,7 @@
 { buildGoModule
 , fetchFromGitHub
 , lib
-, stdenv
+
 }:
 
 buildGoModule rec {
diff --git a/pkgs/development/libraries/prototypejs/default.nix b/pkgs/development/libraries/prototypejs/default.nix
index 81e72036694..fd06b49604a 100644
--- a/pkgs/development/libraries/prototypejs/default.nix
+++ b/pkgs/development/libraries/prototypejs/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, ... }:
+{ lib, fetchurl, ... }:
 let
   version = "1.7.3.0";
 in fetchurl {
diff --git a/pkgs/development/libraries/psol/generic.nix b/pkgs/development/libraries/psol/generic.nix
index 57784c3a502..aa2522a5dad 100644
--- a/pkgs/development/libraries/psol/generic.nix
+++ b/pkgs/development/libraries/psol/generic.nix
@@ -1,4 +1,4 @@
-{ fetchzip, lib, stdenv }:
+{ fetchzip, lib }:
 { version, sha256 }:
 { inherit version; } // fetchzip {
   inherit sha256;
diff --git a/pkgs/development/libraries/qt-5/modules/qtmacextras.nix b/pkgs/development/libraries/qt-5/modules/qtmacextras.nix
index 6639e4c8d69..5e7ccf70204 100644
--- a/pkgs/development/libraries/qt-5/modules/qtmacextras.nix
+++ b/pkgs/development/libraries/qt-5/modules/qtmacextras.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, qtModule, qtbase }:
+{ lib, qtModule, qtbase }:
 
 qtModule {
   name = "qtmacextras";
diff --git a/pkgs/development/libraries/qtstyleplugins/default.nix b/pkgs/development/libraries/qtstyleplugins/default.nix
index 84d7f46a2b2..4587bf46162 100644
--- a/pkgs/development/libraries/qtstyleplugins/default.nix
+++ b/pkgs/development/libraries/qtstyleplugins/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, mkDerivation, fetchFromGitHub, qmake, pkg-config, gtk2 }:
+{ lib, mkDerivation, fetchFromGitHub, qmake, pkg-config, gtk2 }:
 
 mkDerivation {
   name = "qtstyleplugins-2017-03-11";
diff --git a/pkgs/development/libraries/scriptaculous/default.nix b/pkgs/development/libraries/scriptaculous/default.nix
index c2beda45ab3..e3c8ea00f44 100644
--- a/pkgs/development/libraries/scriptaculous/default.nix
+++ b/pkgs/development/libraries/scriptaculous/default.nix
@@ -1,4 +1,6 @@
-{ lib, stdenv, fetchurl, unzip, ... }: stdenv.mkDerivation rec {
+{ lib, stdenv, fetchurl, unzip, ... }:
+
+stdenv.mkDerivation rec {
   pname = "scriptaculous";
   version = "1.9.0";
 
diff --git a/pkgs/development/libraries/smarty3-i18n/default.nix b/pkgs/development/libraries/smarty3-i18n/default.nix
index 7fb6b1adb5a..e617ba58e8b 100644
--- a/pkgs/development/libraries/smarty3-i18n/default.nix
+++ b/pkgs/development/libraries/smarty3-i18n/default.nix
@@ -1,4 +1,6 @@
-{ lib, stdenv, fetchFromGitHub, ... }: stdenv.mkDerivation rec {
+{ lib, stdenv, fetchFromGitHub, ... }:
+
+stdenv.mkDerivation rec {
   pname = "smarty-i18n";
   version = "1.0";
 
diff --git a/pkgs/development/libraries/smarty3/default.nix b/pkgs/development/libraries/smarty3/default.nix
index 2070a3bab79..29f640dedfc 100644
--- a/pkgs/development/libraries/smarty3/default.nix
+++ b/pkgs/development/libraries/smarty3/default.nix
@@ -1,4 +1,6 @@
-{ lib, stdenv, fetchFromGitHub, ... }: stdenv.mkDerivation rec {
+{ lib, stdenv, fetchFromGitHub, ... }:
+
+stdenv.mkDerivation rec {
   pname = "smarty3";
   version = "3.1.36";
 
diff --git a/pkgs/development/libraries/stellarsolver/default.nix b/pkgs/development/libraries/stellarsolver/default.nix
index 8badf60d942..f55c72bd209 100644
--- a/pkgs/development/libraries/stellarsolver/default.nix
+++ b/pkgs/development/libraries/stellarsolver/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, mkDerivation, fetchFromGitHub, cmake,
+{ lib, mkDerivation, fetchFromGitHub, cmake,
   qtbase, cfitsio, gsl, wcslib, withTester ? false }:
 
 mkDerivation rec {
diff --git a/pkgs/development/libraries/vapoursynth/editor.nix b/pkgs/development/libraries/vapoursynth/editor.nix
index 76b50a10907..f9ebed19752 100644
--- a/pkgs/development/libraries/vapoursynth/editor.nix
+++ b/pkgs/development/libraries/vapoursynth/editor.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, mkDerivation, fetchFromBitbucket
+{ lib, mkDerivation, fetchFromBitbucket
 , python3, vapoursynth
 , qmake, qtbase, qtwebsockets
 }:
diff --git a/pkgs/development/lua-modules/generated-packages.nix b/pkgs/development/lua-modules/generated-packages.nix
index 8ec44d17016..85f39228584 100644
--- a/pkgs/development/lua-modules/generated-packages.nix
+++ b/pkgs/development/lua-modules/generated-packages.nix
@@ -5,7 +5,7 @@ nixpkgs$ maintainers/scripts/update-luarocks-packages pkgs/development/lua-modul
 
 These packages are manually refined in lua-overrides.nix
 */
-{ self, stdenv, lib, fetchurl, fetchgit, pkgs, ... } @ args:
+{ self, lib, fetchurl, fetchgit, pkgs, ... } @ args:
 self: super:
 with self;
 {
diff --git a/pkgs/development/misc/haskell/hasura/ci-info/default.nix b/pkgs/development/misc/haskell/hasura/ci-info/default.nix
index 55b070a9f77..2770e74a698 100644
--- a/pkgs/development/misc/haskell/hasura/ci-info/default.nix
+++ b/pkgs/development/misc/haskell/hasura/ci-info/default.nix
@@ -1,5 +1,5 @@
 { mkDerivation, aeson, aeson-casing, base, fetchgit, hashable
-, hpack, lib, stdenv, template-haskell, text, th-lift-instances
+, hpack, lib, template-haskell, text, th-lift-instances
 , unordered-containers
 }:
 mkDerivation {
diff --git a/pkgs/development/misc/haskell/hasura/graphql-engine/default.nix b/pkgs/development/misc/haskell/hasura/graphql-engine/default.nix
index 3cf840c15e1..9e7d448e4c1 100644
--- a/pkgs/development/misc/haskell/hasura/graphql-engine/default.nix
+++ b/pkgs/development/misc/haskell/hasura/graphql-engine/default.nix
@@ -13,7 +13,7 @@
 , optparse-applicative, pem, pg-client, postgresql-binary
 , postgresql-libpq, process, profunctors, psqueues, QuickCheck
 , regex-tdfa, safe, scientific, semver, shakespeare, split
-, Spock-core, lib, stdenv, stm, stm-containers, template-haskell, text
+, Spock-core, lib, stm, stm-containers, template-haskell, text
 , text-builder, text-conversions, th-lift-instances, these, time
 , transformers, transformers-base, unix, unordered-containers
 , uri-encode, uuid, vector, wai, wai-websockets, warp, websockets
diff --git a/pkgs/development/misc/haskell/hasura/graphql-parser/default.nix b/pkgs/development/misc/haskell/hasura/graphql-parser/default.nix
index 82314a7485b..dbd3edf0064 100644
--- a/pkgs/development/misc/haskell/hasura/graphql-parser/default.nix
+++ b/pkgs/development/misc/haskell/hasura/graphql-parser/default.nix
@@ -1,6 +1,6 @@
 { mkDerivation, aeson, attoparsec, base, bytestring, containers
 , criterion, fetchgit, filepath, hedgehog, hpack, prettyprinter
-, protolude, regex-tdfa, scientific, lib, stdenv, template-haskell, text
+, protolude, regex-tdfa, scientific, lib, template-haskell, text
 , text-builder, th-lift-instances, unordered-containers, vector
 }:
 mkDerivation {
diff --git a/pkgs/development/misc/haskell/hasura/pg-client/default.nix b/pkgs/development/misc/haskell/hasura/pg-client/default.nix
index aa780abd8e9..bccb3f6eda3 100644
--- a/pkgs/development/misc/haskell/hasura/pg-client/default.nix
+++ b/pkgs/development/misc/haskell/hasura/pg-client/default.nix
@@ -2,7 +2,7 @@
 , criterion, fetchgit, file-embed, hashable, hashtables, hasql
 , hasql-pool, hasql-transaction, monad-control, mtl
 , postgresql-binary, postgresql-libpq, resource-pool, retry
-, scientific, lib, stdenv, template-haskell, text, text-builder, th-lift
+, scientific, lib, template-haskell, text, text-builder, th-lift
 , th-lift-instances, time, transformers-base, uuid, vector
 }:
 mkDerivation {
diff --git a/pkgs/development/misc/loc/default.nix b/pkgs/development/misc/loc/default.nix
index 74b5ca09d2a..fb518279d00 100644
--- a/pkgs/development/misc/loc/default.nix
+++ b/pkgs/development/misc/loc/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, rustPlatform }:
+{ lib, fetchFromGitHub, rustPlatform }:
 
 with rustPlatform;
 
diff --git a/pkgs/development/ocaml-modules/janestreet/variantslib.nix b/pkgs/development/ocaml-modules/janestreet/variantslib.nix
index 3fd7877d2bb..053ab412f88 100644
--- a/pkgs/development/ocaml-modules/janestreet/variantslib.nix
+++ b/pkgs/development/ocaml-modules/janestreet/variantslib.nix
@@ -1,4 +1,4 @@
-{lib, stdenv, buildOcamlJane, type_conv}:
+{lib, buildOcamlJane, type_conv}:
 
 buildOcamlJane {
   name = "variantslib";
diff --git a/pkgs/development/ocaml-modules/kafka/default.nix b/pkgs/development/ocaml-modules/kafka/default.nix
index d1ebe95be89..66055dca66e 100644
--- a/pkgs/development/ocaml-modules/kafka/default.nix
+++ b/pkgs/development/ocaml-modules/kafka/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, buildDunePackage, base, cmdliner, ocaml_lwt,
+{ lib, fetchFromGitHub, buildDunePackage, base, cmdliner, ocaml_lwt,
   rdkafka, zlib }:
 
 buildDunePackage rec {
diff --git a/pkgs/development/ocaml-modules/parany/default.nix b/pkgs/development/ocaml-modules/parany/default.nix
index 34e14959e32..afe9e7d39b5 100644
--- a/pkgs/development/ocaml-modules/parany/default.nix
+++ b/pkgs/development/ocaml-modules/parany/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildDunePackage, fetchFromGitHub, ocamlnet, cpu }:
+{ lib, buildDunePackage, fetchFromGitHub, ocamlnet, cpu }:
 
 buildDunePackage rec {
   pname = "parany";
diff --git a/pkgs/development/ocaml-modules/phylogenetics/default.nix b/pkgs/development/ocaml-modules/phylogenetics/default.nix
index d3d6097b446..b284f7ef5eb 100644
--- a/pkgs/development/ocaml-modules/phylogenetics/default.nix
+++ b/pkgs/development/ocaml-modules/phylogenetics/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildDunePackage, fetchFromGitHub, ppx_deriving
+{ lib, buildDunePackage, fetchFromGitHub, ppx_deriving
 , alcotest, angstrom-unix, biocaml, gnuplot, gsl, lacaml, menhir, owl, printbox }:
 
 buildDunePackage rec {
diff --git a/pkgs/development/ocaml-modules/wtf8/default.nix b/pkgs/development/ocaml-modules/wtf8/default.nix
index b46386b1666..828df66b41d 100644
--- a/pkgs/development/ocaml-modules/wtf8/default.nix
+++ b/pkgs/development/ocaml-modules/wtf8/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, buildDunePackage }:
+{ lib, fetchurl, buildDunePackage }:
 
 buildDunePackage rec {
   pname = "wtf8";
diff --git a/pkgs/development/perl-modules/MNI/default.nix b/pkgs/development/perl-modules/MNI/default.nix
index c0fc8f28108..2ef7b90842e 100644
--- a/pkgs/development/perl-modules/MNI/default.nix
+++ b/pkgs/development/perl-modules/MNI/default.nix
@@ -1,4 +1,4 @@
-{ fetchFromGitHub, buildPerlPackage, lib, stdenv }:
+{ fetchFromGitHub, buildPerlPackage, lib }:
 
 buildPerlPackage {
   pname = "MNI-Perllib";
diff --git a/pkgs/development/perl-modules/Percona-Toolkit/default.nix b/pkgs/development/perl-modules/Percona-Toolkit/default.nix
index 3c555ca37ab..5efac53f837 100644
--- a/pkgs/development/perl-modules/Percona-Toolkit/default.nix
+++ b/pkgs/development/perl-modules/Percona-Toolkit/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, buildPerlPackage, shortenPerlShebang
+{ lib, fetchFromGitHub, buildPerlPackage, shortenPerlShebang
 , DBDmysql, DBI, IOSocketSSL, TermReadKey
 }:
 
diff --git a/pkgs/development/perl-modules/maatkit/default.nix b/pkgs/development/perl-modules/maatkit/default.nix
index 29bcc9bab25..d6945083f63 100644
--- a/pkgs/development/perl-modules/maatkit/default.nix
+++ b/pkgs/development/perl-modules/maatkit/default.nix
@@ -1,4 +1,4 @@
-{buildPerlPackage, lib, stdenv, fetchurl, DBDmysql}:
+{buildPerlPackage, lib, fetchurl, DBDmysql}:
 
 buildPerlPackage {
   pname = "maatkit";
diff --git a/pkgs/development/python-modules/FormEncode/default.nix b/pkgs/development/python-modules/FormEncode/default.nix
index 2b06fcdce7d..74884f36f03 100644
--- a/pkgs/development/python-modules/FormEncode/default.nix
+++ b/pkgs/development/python-modules/FormEncode/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, dnspython, pycountry, nose, setuptools_scm, six, isPy27 }:
+{ lib, buildPythonPackage, fetchPypi, dnspython, pycountry, nose, setuptools_scm, six, isPy27 }:
 
 buildPythonPackage rec {
   pname = "FormEncode";
diff --git a/pkgs/development/python-modules/HTSeq/default.nix b/pkgs/development/python-modules/HTSeq/default.nix
index be4bb9e31d3..486f8a4556f 100644
--- a/pkgs/development/python-modules/HTSeq/default.nix
+++ b/pkgs/development/python-modules/HTSeq/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub, cython, numpy, pysam, matplotlib, python, isPy27, isPy3k }:
+{ lib, buildPythonPackage, fetchFromGitHub, cython, numpy, pysam, matplotlib, python, isPy27, isPy3k }:
 buildPythonPackage rec {
   version = "0.12.4";
   pname = "HTSeq";
diff --git a/pkgs/development/python-modules/IPy/default.nix b/pkgs/development/python-modules/IPy/default.nix
index f142c245922..05587ef0740 100644
--- a/pkgs/development/python-modules/IPy/default.nix
+++ b/pkgs/development/python-modules/IPy/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, nose }:
+{ lib, buildPythonPackage, fetchPypi, nose }:
 
 buildPythonPackage rec {
   pname = "IPy";
diff --git a/pkgs/development/python-modules/PyLD/default.nix b/pkgs/development/python-modules/PyLD/default.nix
index 247b7f0332f..5a4741a730a 100644
--- a/pkgs/development/python-modules/PyLD/default.nix
+++ b/pkgs/development/python-modules/PyLD/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub, python, requests, gnugrep }:
+{ lib, buildPythonPackage, fetchFromGitHub, python, requests, gnugrep }:
 
 let
 
diff --git a/pkgs/development/python-modules/ROPGadget/default.nix b/pkgs/development/python-modules/ROPGadget/default.nix
index ebedb3c6969..8c34e75139f 100644
--- a/pkgs/development/python-modules/ROPGadget/default.nix
+++ b/pkgs/development/python-modules/ROPGadget/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , capstone}:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/Wand/default.nix b/pkgs/development/python-modules/Wand/default.nix
index d7ad28c0133..e180f0cea33 100644
--- a/pkgs/development/python-modules/Wand/default.nix
+++ b/pkgs/development/python-modules/Wand/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , imagemagick7Big
diff --git a/pkgs/development/python-modules/WazeRouteCalculator/default.nix b/pkgs/development/python-modules/WazeRouteCalculator/default.nix
index 28515e6f602..6da500413f0 100644
--- a/pkgs/development/python-modules/WazeRouteCalculator/default.nix
+++ b/pkgs/development/python-modules/WazeRouteCalculator/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , requests }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/aadict/default.nix b/pkgs/development/python-modules/aadict/default.nix
index cf6976fa6c1..de3ec6fa7f0 100644
--- a/pkgs/development/python-modules/aadict/default.nix
+++ b/pkgs/development/python-modules/aadict/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , six
diff --git a/pkgs/development/python-modules/aafigure/default.nix b/pkgs/development/python-modules/aafigure/default.nix
index 5350443eeaa..0b9f1457178 100644
--- a/pkgs/development/python-modules/aafigure/default.nix
+++ b/pkgs/development/python-modules/aafigure/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, pillow }:
+{ lib, buildPythonPackage, fetchPypi, pillow }:
 
 buildPythonPackage rec {
   pname = "aafigure";
diff --git a/pkgs/development/python-modules/acebinf/default.nix b/pkgs/development/python-modules/acebinf/default.nix
index f8134aaf5b3..7889e007d83 100644
--- a/pkgs/development/python-modules/acebinf/default.nix
+++ b/pkgs/development/python-modules/acebinf/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pyvcf
diff --git a/pkgs/development/python-modules/acme-tiny/default.nix b/pkgs/development/python-modules/acme-tiny/default.nix
index 75408244e66..c979104914d 100644
--- a/pkgs/development/python-modules/acme-tiny/default.nix
+++ b/pkgs/development/python-modules/acme-tiny/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, setuptools_scm, fusepy, fuse
+{ lib, buildPythonPackage, fetchPypi, setuptools_scm, fusepy, fuse
 , openssl }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/actdiag/default.nix b/pkgs/development/python-modules/actdiag/default.nix
index ca47018f56f..92917f6ea95 100644
--- a/pkgs/development/python-modules/actdiag/default.nix
+++ b/pkgs/development/python-modules/actdiag/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , nose, docutils, blockdiag, reportlab }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/adal/default.nix b/pkgs/development/python-modules/adal/default.nix
index f7e973c8f69..55dc21240ec 100644
--- a/pkgs/development/python-modules/adal/default.nix
+++ b/pkgs/development/python-modules/adal/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , requests, pyjwt, dateutil }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/aenum/default.nix b/pkgs/development/python-modules/aenum/default.nix
index f21d8f4195a..4f30eefbf90 100644
--- a/pkgs/development/python-modules/aenum/default.nix
+++ b/pkgs/development/python-modules/aenum/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage, python, isPy3k, glibcLocales }:
+{ lib, fetchPypi, buildPythonPackage, python, isPy3k, glibcLocales }:
 
 buildPythonPackage rec {
   pname = "aenum";
diff --git a/pkgs/development/python-modules/agate-dbf/default.nix b/pkgs/development/python-modules/agate-dbf/default.nix
index 099fb1701cb..0299a94ebb0 100644
--- a/pkgs/development/python-modules/agate-dbf/default.nix
+++ b/pkgs/development/python-modules/agate-dbf/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage, agate, dbf, dbfread }:
+{ lib, fetchPypi, buildPythonPackage, agate, dbf, dbfread }:
 
 buildPythonPackage rec {
     pname = "agate-dbf";
diff --git a/pkgs/development/python-modules/agate-sql/default.nix b/pkgs/development/python-modules/agate-sql/default.nix
index 566951ea71d..29bbfa81ed2 100644
--- a/pkgs/development/python-modules/agate-sql/default.nix
+++ b/pkgs/development/python-modules/agate-sql/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage, agate, sqlalchemy, crate }:
+{ lib, fetchPypi, buildPythonPackage, agate, sqlalchemy, crate }:
 
 buildPythonPackage rec {
     pname = "agate-sql";
diff --git a/pkgs/development/python-modules/aiobotocore/default.nix b/pkgs/development/python-modules/aiobotocore/default.nix
index 30821986539..2e7c9c2401c 100644
--- a/pkgs/development/python-modules/aiobotocore/default.nix
+++ b/pkgs/development/python-modules/aiobotocore/default.nix
@@ -1,5 +1,5 @@
 { lib
-, stdenv
+
 , buildPythonPackage
 , fetchPypi
 , pythonOlder
diff --git a/pkgs/development/python-modules/aiodns/default.nix b/pkgs/development/python-modules/aiodns/default.nix
index 4ba4bd59af2..1adc6f81524 100644
--- a/pkgs/development/python-modules/aiodns/default.nix
+++ b/pkgs/development/python-modules/aiodns/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, pythonOlder
+{ lib, buildPythonPackage, fetchPypi, pythonOlder
 , isPy27, isPyPy, python, pycares, typing, trollius }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/aioeventlet/default.nix b/pkgs/development/python-modules/aioeventlet/default.nix
index 4bdd2b1327c..0d6796706cb 100644
--- a/pkgs/development/python-modules/aioeventlet/default.nix
+++ b/pkgs/development/python-modules/aioeventlet/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , eventlet
diff --git a/pkgs/development/python-modules/aioitertools/default.nix b/pkgs/development/python-modules/aioitertools/default.nix
index 1c5ce1e2fae..91d83e93cbd 100644
--- a/pkgs/development/python-modules/aioitertools/default.nix
+++ b/pkgs/development/python-modules/aioitertools/default.nix
@@ -1,5 +1,5 @@
 { lib
-, stdenv
+
 , buildPythonPackage
 , fetchPypi
 , pythonOlder
diff --git a/pkgs/development/python-modules/aioredis/default.nix b/pkgs/development/python-modules/aioredis/default.nix
index 94f503fe2cc..fe48ba0e1e1 100644
--- a/pkgs/development/python-modules/aioredis/default.nix
+++ b/pkgs/development/python-modules/aioredis/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , pkgs, async-timeout, hiredis, isPyPy, isPy27
 }:
 
diff --git a/pkgs/development/python-modules/aiozeroconf/default.nix b/pkgs/development/python-modules/aiozeroconf/default.nix
index d73ae2b35df..fe3943c25b1 100644
--- a/pkgs/development/python-modules/aiozeroconf/default.nix
+++ b/pkgs/development/python-modules/aiozeroconf/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , netifaces
diff --git a/pkgs/development/python-modules/ajpy/default.nix b/pkgs/development/python-modules/ajpy/default.nix
index 0dd135e139f..926b5ed7efe 100644
--- a/pkgs/development/python-modules/ajpy/default.nix
+++ b/pkgs/development/python-modules/ajpy/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "ajpy";
diff --git a/pkgs/development/python-modules/alabaster/default.nix b/pkgs/development/python-modules/alabaster/default.nix
index b4cc69e555b..72eda332f95 100644
--- a/pkgs/development/python-modules/alabaster/default.nix
+++ b/pkgs/development/python-modules/alabaster/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , pygments }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/alarmdecoder/default.nix b/pkgs/development/python-modules/alarmdecoder/default.nix
index b563a80447f..10438d54081 100644
--- a/pkgs/development/python-modules/alarmdecoder/default.nix
+++ b/pkgs/development/python-modules/alarmdecoder/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub, pyserial, pyftdi, pyusb
+{ lib, buildPythonPackage, fetchFromGitHub, pyserial, pyftdi, pyusb
 , pyopenssl, nose, isPy3k, pythonOlder, mock }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/alembic/default.nix b/pkgs/development/python-modules/alembic/default.nix
index 142c6d1c416..5a4ef5e0bc6 100644
--- a/pkgs/development/python-modules/alembic/default.nix
+++ b/pkgs/development/python-modules/alembic/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , pytest, pytestcov, mock, coverage, setuptools
 , Mako, sqlalchemy, python-editor, dateutil
 }:
diff --git a/pkgs/development/python-modules/alerta-server/default.nix b/pkgs/development/python-modules/alerta-server/default.nix
index dd2d82578ea..82783dd16bb 100644
--- a/pkgs/development/python-modules/alerta-server/default.nix
+++ b/pkgs/development/python-modules/alerta-server/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, pythonOlder
+{ lib, buildPythonPackage, fetchPypi, pythonOlder
 , bcrypt, blinker, flask, flask-compress, flask-cors, mohawk, psycopg2, pyjwt, pymongo, python-dateutil, pytz, pyyaml, requests, requests-hawk, sentry-sdk
 }:
 
diff --git a/pkgs/development/python-modules/alerta/default.nix b/pkgs/development/python-modules/alerta/default.nix
index 19dd17ee3f0..e69503777d4 100644
--- a/pkgs/development/python-modules/alerta/default.nix
+++ b/pkgs/development/python-modules/alerta/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , six, click, requests, requests-hawk, pytz, tabulate, pythonOlder
 }:
 
diff --git a/pkgs/development/python-modules/alot/default.nix b/pkgs/development/python-modules/alot/default.nix
index 21c6aaff2fb..1f4617ce9c0 100644
--- a/pkgs/development/python-modules/alot/default.nix
+++ b/pkgs/development/python-modules/alot/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, buildPythonPackage, python, fetchFromGitHub, fetchpatch, isPy3k
+{ lib, buildPythonPackage, python, fetchFromGitHub, fetchpatch, isPy3k
 , notmuch, urwid, urwidtrees, twisted, python_magic, configobj, mock, file, gpgme
 , service-identity
 , gnupg ? null, sphinx, awk ? null, procps ? null, future ? null
diff --git a/pkgs/development/python-modules/altair/default.nix b/pkgs/development/python-modules/altair/default.nix
index a3b515ebeca..37c1efd9c1b 100644
--- a/pkgs/development/python-modules/altair/default.nix
+++ b/pkgs/development/python-modules/altair/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, isPy27
+{ lib, buildPythonPackage, fetchPypi, isPy27
 , entrypoints
 , glibcLocales
 , ipython
diff --git a/pkgs/development/python-modules/amazon_kclpy/default.nix b/pkgs/development/python-modules/amazon_kclpy/default.nix
index ed266c0db78..44dc739f1ca 100644
--- a/pkgs/development/python-modules/amazon_kclpy/default.nix
+++ b/pkgs/development/python-modules/amazon_kclpy/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub, python, mock, boto, pytest }:
+{ lib, buildPythonPackage, fetchFromGitHub, python, mock, boto, pytest }:
 
 buildPythonPackage rec {
   pname = "amazon_kclpy";
diff --git a/pkgs/development/python-modules/amply/default.nix b/pkgs/development/python-modules/amply/default.nix
index 32bcbb4589a..0589caf1e6a 100644
--- a/pkgs/development/python-modules/amply/default.nix
+++ b/pkgs/development/python-modules/amply/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , fetchPypi
 , buildPythonPackage
 , setuptools_scm
diff --git a/pkgs/development/python-modules/amqp/default.nix b/pkgs/development/python-modules/amqp/default.nix
index b614ae453d2..be40465496c 100644
--- a/pkgs/development/python-modules/amqp/default.nix
+++ b/pkgs/development/python-modules/amqp/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, pytestCheckHook, case, vine }:
+{ lib, buildPythonPackage, fetchPypi, pytestCheckHook, case, vine }:
 
 buildPythonPackage rec {
   pname = "amqp";
diff --git a/pkgs/development/python-modules/amqplib/default.nix b/pkgs/development/python-modules/amqplib/default.nix
index c7b4dc865bb..430065b7d1f 100644
--- a/pkgs/development/python-modules/amqplib/default.nix
+++ b/pkgs/development/python-modules/amqplib/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, python }:
+{ lib, buildPythonPackage, fetchPypi, python }:
 
 buildPythonPackage rec {
   pname = "amqplib";
diff --git a/pkgs/development/python-modules/aniso8601/default.nix b/pkgs/development/python-modules/aniso8601/default.nix
index 804402a4ca6..538cb11db13 100644
--- a/pkgs/development/python-modules/aniso8601/default.nix
+++ b/pkgs/development/python-modules/aniso8601/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , dateutil, mock, isPy3k }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/annoy/default.nix b/pkgs/development/python-modules/annoy/default.nix
index 0bd06084380..d5f24492c90 100644
--- a/pkgs/development/python-modules/annoy/default.nix
+++ b/pkgs/development/python-modules/annoy/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , h5py
diff --git a/pkgs/development/python-modules/anonip/default.nix b/pkgs/development/python-modules/anonip/default.nix
index 9c1b3abf980..0663fddd6fb 100644
--- a/pkgs/development/python-modules/anonip/default.nix
+++ b/pkgs/development/python-modules/anonip/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, buildPythonPackage, fetchFromGitHub, ipaddress, isPy27 }:
+{ lib, buildPythonPackage, fetchFromGitHub, ipaddress, isPy27 }:
 
 buildPythonPackage rec {
   pname = "anonip";
diff --git a/pkgs/development/python-modules/ansicolor/default.nix b/pkgs/development/python-modules/ansicolor/default.nix
index 3d96061362e..99a419a60fa 100644
--- a/pkgs/development/python-modules/ansicolor/default.nix
+++ b/pkgs/development/python-modules/ansicolor/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "ansicolor";
diff --git a/pkgs/development/python-modules/ansicolors/default.nix b/pkgs/development/python-modules/ansicolors/default.nix
index 7d6dd2127e6..fab91690ab2 100644
--- a/pkgs/development/python-modules/ansicolors/default.nix
+++ b/pkgs/development/python-modules/ansicolors/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, pytest }:
+{ lib, buildPythonPackage, fetchPypi, pytest }:
 
 buildPythonPackage rec {
   pname = "ansicolors";
diff --git a/pkgs/development/python-modules/ansiconv/default.nix b/pkgs/development/python-modules/ansiconv/default.nix
index 6a3571960d0..ba0c06f536a 100644
--- a/pkgs/development/python-modules/ansiconv/default.nix
+++ b/pkgs/development/python-modules/ansiconv/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub, pytest }:
+{ lib, buildPythonPackage, fetchFromGitHub, pytest }:
 
 buildPythonPackage rec {
   pname = "ansiconv";
diff --git a/pkgs/development/python-modules/apipkg/default.nix b/pkgs/development/python-modules/apipkg/default.nix
index 604c37b42ba..10e2369e12e 100644
--- a/pkgs/development/python-modules/apipkg/default.nix
+++ b/pkgs/development/python-modules/apipkg/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , pytest, setuptools_scm, isPy3k }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/approvaltests/default.nix b/pkgs/development/python-modules/approvaltests/default.nix
index bc47de37128..6f2c55d45cb 100644
--- a/pkgs/development/python-modules/approvaltests/default.nix
+++ b/pkgs/development/python-modules/approvaltests/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub, isPy37, pyperclip }:
+{ lib, buildPythonPackage, fetchFromGitHub, isPy37, pyperclip }:
 
 buildPythonPackage rec {
   version = "0.2.6";
diff --git a/pkgs/development/python-modules/apsw/default.nix b/pkgs/development/python-modules/apsw/default.nix
index de74480765a..8933d4e91bc 100644
--- a/pkgs/development/python-modules/apsw/default.nix
+++ b/pkgs/development/python-modules/apsw/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub, fetchpatch
+{ lib, buildPythonPackage, fetchFromGitHub, fetchpatch
 , sqlite, isPyPy }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/argh/default.nix b/pkgs/development/python-modules/argh/default.nix
index 0e2beb6a31e..bbe120ec14f 100644
--- a/pkgs/development/python-modules/argh/default.nix
+++ b/pkgs/development/python-modules/argh/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pytest
diff --git a/pkgs/development/python-modules/args/default.nix b/pkgs/development/python-modules/args/default.nix
index cb349484f27..9faf16037d0 100644
--- a/pkgs/development/python-modules/args/default.nix
+++ b/pkgs/development/python-modules/args/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "args";
diff --git a/pkgs/development/python-modules/aria2p/default.nix b/pkgs/development/python-modules/aria2p/default.nix
index 076fec8c56b..2bb950beb28 100644
--- a/pkgs/development/python-modules/aria2p/default.nix
+++ b/pkgs/development/python-modules/aria2p/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub, pythonOlder
+{ lib, buildPythonPackage, fetchFromGitHub, pythonOlder
 , aria2, poetry, pytest, pytestcov, pytest_xdist, responses
 , asciimatics, loguru, requests, setuptools, websocket_client
 }:
diff --git a/pkgs/development/python-modules/arrow/default.nix b/pkgs/development/python-modules/arrow/default.nix
index 7dbe3b98fca..d87f1ede3cc 100644
--- a/pkgs/development/python-modules/arrow/default.nix
+++ b/pkgs/development/python-modules/arrow/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, buildPythonPackage, fetchPypi, isPy27
+{ lib, buildPythonPackage, fetchPypi, isPy27
 , nose, chai, simplejson, backports_functools_lru_cache
 , python-dateutil, pytz, pytest-mock, sphinx, dateparser, pytestcov
 , pytestCheckHook
diff --git a/pkgs/development/python-modules/asana/default.nix b/pkgs/development/python-modules/asana/default.nix
index ed5e441df97..c7839f05147 100644
--- a/pkgs/development/python-modules/asana/default.nix
+++ b/pkgs/development/python-modules/asana/default.nix
@@ -1,5 +1,5 @@
 { buildPythonPackage, pythonAtLeast, pytest, requests, requests_oauthlib, six
-, fetchFromGitHub, responses, lib, stdenv
+, fetchFromGitHub, responses, lib
 }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/asn1ate/default.nix b/pkgs/development/python-modules/asn1ate/default.nix
index 2735bbf2f70..a141fc746f7 100644
--- a/pkgs/development/python-modules/asn1ate/default.nix
+++ b/pkgs/development/python-modules/asn1ate/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub, pyparsing }:
+{ lib, buildPythonPackage, fetchFromGitHub, pyparsing }:
 
 buildPythonPackage rec {
   pname = "asn1ate";
diff --git a/pkgs/development/python-modules/astral/default.nix b/pkgs/development/python-modules/astral/default.nix
index 4ea53e17eb0..8c97ef6750f 100644
--- a/pkgs/development/python-modules/astral/default.nix
+++ b/pkgs/development/python-modules/astral/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, isPy27, pytz, requests, pytest, freezegun }:
+{ lib, buildPythonPackage, fetchPypi, isPy27, pytz, requests, pytest, freezegun }:
 
 buildPythonPackage rec {
   pname = "astral";
diff --git a/pkgs/development/python-modules/astunparse/default.nix b/pkgs/development/python-modules/astunparse/default.nix
index c9001da5c70..b32df24f5bb 100644
--- a/pkgs/development/python-modules/astunparse/default.nix
+++ b/pkgs/development/python-modules/astunparse/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , fetchPypi
 , buildPythonPackage
 , six
diff --git a/pkgs/development/python-modules/asyncssh/default.nix b/pkgs/development/python-modules/asyncssh/default.nix
index d3684ea5720..9271adeb617 100644
--- a/pkgs/development/python-modules/asyncssh/default.nix
+++ b/pkgs/development/python-modules/asyncssh/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, pythonOlder
+{ lib, buildPythonPackage, fetchPypi, pythonOlder
 , cryptography
 , bcrypt, gssapi, libnacl, libsodium, nettle, pyopenssl
 , openssl, openssh, pytestCheckHook }:
diff --git a/pkgs/development/python-modules/atomiclong/default.nix b/pkgs/development/python-modules/atomiclong/default.nix
index 7bcb36d548d..0fccc943c8a 100644
--- a/pkgs/development/python-modules/atomiclong/default.nix
+++ b/pkgs/development/python-modules/atomiclong/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, pytest, cffi }:
+{ lib, buildPythonPackage, fetchPypi, pytest, cffi }:
 
 buildPythonPackage rec {
   pname = "atomiclong";
diff --git a/pkgs/development/python-modules/atomicwrites/default.nix b/pkgs/development/python-modules/atomicwrites/default.nix
index e958b0f16d6..5335c044cd2 100644
--- a/pkgs/development/python-modules/atomicwrites/default.nix
+++ b/pkgs/development/python-modules/atomicwrites/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, pytest }:
+{ lib, buildPythonPackage, fetchPypi, pytest }:
 
 buildPythonPackage rec {
   pname = "atomicwrites";
diff --git a/pkgs/development/python-modules/atomman/default.nix b/pkgs/development/python-modules/atomman/default.nix
index 147d2e77deb..b576504588a 100644
--- a/pkgs/development/python-modules/atomman/default.nix
+++ b/pkgs/development/python-modules/atomman/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub, isPy27
+{ lib, buildPythonPackage, fetchFromGitHub, isPy27
 , cython
 , datamodeldict
 , matplotlib
diff --git a/pkgs/development/python-modules/atsim_potentials/default.nix b/pkgs/development/python-modules/atsim_potentials/default.nix
index 6b8b8dccef8..4802ea867b7 100644
--- a/pkgs/development/python-modules/atsim_potentials/default.nix
+++ b/pkgs/development/python-modules/atsim_potentials/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , configparser
diff --git a/pkgs/development/python-modules/attrdict/default.nix b/pkgs/development/python-modules/attrdict/default.nix
index 5c7514f9da6..cb87b9027f0 100644
--- a/pkgs/development/python-modules/attrdict/default.nix
+++ b/pkgs/development/python-modules/attrdict/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, coverage, nose, six }:
+{ lib, buildPythonPackage, fetchPypi, coverage, nose, six }:
 
 buildPythonPackage rec {
   pname = "attrdict";
diff --git a/pkgs/development/python-modules/authlib/default.nix b/pkgs/development/python-modules/authlib/default.nix
index 3e6faae9af0..4fa14a60ff8 100644
--- a/pkgs/development/python-modules/authlib/default.nix
+++ b/pkgs/development/python-modules/authlib/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 , pytest
diff --git a/pkgs/development/python-modules/authres/default.nix b/pkgs/development/python-modules/authres/default.nix
index c3d0402d48d..196e573717b 100644
--- a/pkgs/development/python-modules/authres/default.nix
+++ b/pkgs/development/python-modules/authres/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage, python }:
+{ lib, fetchPypi, buildPythonPackage, python }:
 
 buildPythonPackage rec {
   pname = "authres";
diff --git a/pkgs/development/python-modules/autograd/default.nix b/pkgs/development/python-modules/autograd/default.nix
index fef97a7a6f4..0bdee21b69c 100644
--- a/pkgs/development/python-modules/autograd/default.nix
+++ b/pkgs/development/python-modules/autograd/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, numpy, future }:
+{ lib, buildPythonPackage, fetchPypi, numpy, future }:
 
 buildPythonPackage rec {
   pname = "autograd";
diff --git a/pkgs/development/python-modules/autologging/default.nix b/pkgs/development/python-modules/autologging/default.nix
index 7cd66dc2c3f..fdd935303d0 100644
--- a/pkgs/development/python-modules/autologging/default.nix
+++ b/pkgs/development/python-modules/autologging/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "Autologging";
diff --git a/pkgs/development/python-modules/automat/default.nix b/pkgs/development/python-modules/automat/default.nix
index fa395f119ee..20f54870e1f 100644
--- a/pkgs/development/python-modules/automat/default.nix
+++ b/pkgs/development/python-modules/automat/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi,
+{ lib, buildPythonPackage, fetchPypi,
   m2r, setuptools_scm, six, attrs }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/autopep8/default.nix b/pkgs/development/python-modules/autopep8/default.nix
index afeaef40661..c748c0cb8c1 100644
--- a/pkgs/development/python-modules/autopep8/default.nix
+++ b/pkgs/development/python-modules/autopep8/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage, pycodestyle, glibcLocales
+{ lib, fetchPypi, buildPythonPackage, pycodestyle, glibcLocales
 , toml
 }:
 
diff --git a/pkgs/development/python-modules/avro-python3/default.nix b/pkgs/development/python-modules/avro-python3/default.nix
index 3e9a0e492d3..e0294246fb2 100644
--- a/pkgs/development/python-modules/avro-python3/default.nix
+++ b/pkgs/development/python-modules/avro-python3/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, isPy3k, pycodestyle, isort }:
+{ lib, buildPythonPackage, fetchPypi, isPy3k, pycodestyle, isort }:
 
 buildPythonPackage rec {
   pname = "avro-python3";
diff --git a/pkgs/development/python-modules/avro/default.nix b/pkgs/development/python-modules/avro/default.nix
index 35cab724a86..5a38e86eee3 100644
--- a/pkgs/development/python-modules/avro/default.nix
+++ b/pkgs/development/python-modules/avro/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, isPy3k, fetchPypi, pycodestyle, isort }:
+{ lib, buildPythonPackage, isPy3k, fetchPypi, pycodestyle, isort }:
 
 buildPythonPackage rec {
   pname = "avro";
diff --git a/pkgs/development/python-modules/avro3k/default.nix b/pkgs/development/python-modules/avro3k/default.nix
index b600bc75c7a..f6ad9bf086c 100644
--- a/pkgs/development/python-modules/avro3k/default.nix
+++ b/pkgs/development/python-modules/avro3k/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, isPy3k }:
+{ lib, buildPythonPackage, fetchPypi, isPy3k }:
 
 buildPythonPackage rec {
   pname = "avro3k";
diff --git a/pkgs/development/python-modules/awesome-slugify/default.nix b/pkgs/development/python-modules/awesome-slugify/default.nix
index 00882cb0827..47ca9859b5e 100644
--- a/pkgs/development/python-modules/awesome-slugify/default.nix
+++ b/pkgs/development/python-modules/awesome-slugify/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, unidecode, regex, python }:
+{ lib, buildPythonPackage, fetchPypi, unidecode, regex, python }:
 
 buildPythonPackage rec {
   pname = "awesome-slugify";
diff --git a/pkgs/development/python-modules/b2sdk/default.nix b/pkgs/development/python-modules/b2sdk/default.nix
index da43f6e5690..cd695132d7a 100644
--- a/pkgs/development/python-modules/b2sdk/default.nix
+++ b/pkgs/development/python-modules/b2sdk/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, setuptools_scm, isPy27, pytestCheckHook
+{ lib, buildPythonPackage, fetchPypi, setuptools_scm, isPy27, pytestCheckHook
 , requests, arrow, logfury, tqdm }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/babelfish/default.nix b/pkgs/development/python-modules/babelfish/default.nix
index 5ac04429215..ba015f597ce 100644
--- a/pkgs/development/python-modules/babelfish/default.nix
+++ b/pkgs/development/python-modules/babelfish/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, setuptools }:
+{ lib, buildPythonPackage, fetchPypi, setuptools }:
 
 buildPythonPackage rec {
   pname = "babelfish";
diff --git a/pkgs/development/python-modules/babelgladeextractor/default.nix b/pkgs/development/python-modules/babelgladeextractor/default.nix
index 0df03754127..b1516d1abdb 100644
--- a/pkgs/development/python-modules/babelgladeextractor/default.nix
+++ b/pkgs/development/python-modules/babelgladeextractor/default.nix
@@ -1,5 +1,4 @@
-{ stdenv
-, lib
+{ lib
 , isPy3k
 , buildPythonPackage
 , fetchPypi
diff --git a/pkgs/development/python-modules/backports-shutil-which/default.nix b/pkgs/development/python-modules/backports-shutil-which/default.nix
index 5fe922b9046..52163abe8bc 100644
--- a/pkgs/development/python-modules/backports-shutil-which/default.nix
+++ b/pkgs/development/python-modules/backports-shutil-which/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage, pytest }:
+{ lib, fetchPypi, buildPythonPackage, pytest }:
 
 buildPythonPackage rec {
   pname = "backports.shutil_which";
diff --git a/pkgs/development/python-modules/backports_csv/default.nix b/pkgs/development/python-modules/backports_csv/default.nix
index 5216149ddc2..6086178c959 100644
--- a/pkgs/development/python-modules/backports_csv/default.nix
+++ b/pkgs/development/python-modules/backports_csv/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, future }:
+{ lib, buildPythonPackage, fetchPypi, future }:
 
 buildPythonPackage rec {
 
diff --git a/pkgs/development/python-modules/backports_os/default.nix b/pkgs/development/python-modules/backports_os/default.nix
index b3e231bcd05..39973e433ee 100644
--- a/pkgs/development/python-modules/backports_os/default.nix
+++ b/pkgs/development/python-modules/backports_os/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , setuptools_scm
diff --git a/pkgs/development/python-modules/backports_unittest-mock/default.nix b/pkgs/development/python-modules/backports_unittest-mock/default.nix
index 08f98de79f2..a9950eb704f 100644
--- a/pkgs/development/python-modules/backports_unittest-mock/default.nix
+++ b/pkgs/development/python-modules/backports_unittest-mock/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, setuptools_scm, mock }:
+{ lib, buildPythonPackage, fetchPypi, setuptools_scm, mock }:
 
 buildPythonPackage rec {
   pname = "backports.unittest_mock";
diff --git a/pkgs/development/python-modules/backports_weakref/default.nix b/pkgs/development/python-modules/backports_weakref/default.nix
index 9770fb45981..c04b88a3f32 100644
--- a/pkgs/development/python-modules/backports_weakref/default.nix
+++ b/pkgs/development/python-modules/backports_weakref/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , setuptools_scm
diff --git a/pkgs/development/python-modules/bacpypes/default.nix b/pkgs/development/python-modules/bacpypes/default.nix
index 59542e61c56..f07c5e90d51 100644
--- a/pkgs/development/python-modules/bacpypes/default.nix
+++ b/pkgs/development/python-modules/bacpypes/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, fetchFromGitHub
+{ lib, buildPythonPackage, fetchPypi, fetchFromGitHub
 , wheel, pytestCheckHook, pytestrunner }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/bap/default.nix b/pkgs/development/python-modules/bap/default.nix
index d2575afb77d..03abf67f86a 100644
--- a/pkgs/development/python-modules/bap/default.nix
+++ b/pkgs/development/python-modules/bap/default.nix
@@ -1,4 +1,4 @@
-{lib, stdenv, buildPythonPackage, fetchFromGitHub, bap, requests}:
+{lib, buildPythonPackage, fetchFromGitHub, bap, requests}:
 
 buildPythonPackage rec {
   pname = "bap";
diff --git a/pkgs/development/python-modules/base58/default.nix b/pkgs/development/python-modules/base58/default.nix
index a36727429ca..1e1da32f6c9 100644
--- a/pkgs/development/python-modules/base58/default.nix
+++ b/pkgs/development/python-modules/base58/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage, isPy27, pytest, pyhamcrest }:
+{ lib, fetchPypi, buildPythonPackage, isPy27, pytest, pyhamcrest }:
 
 buildPythonPackage rec {
   pname = "base58";
diff --git a/pkgs/development/python-modules/basemap/default.nix b/pkgs/development/python-modules/basemap/default.nix
index c97548bdee8..2fadda388ba 100644
--- a/pkgs/development/python-modules/basemap/default.nix
+++ b/pkgs/development/python-modules/basemap/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 , numpy
diff --git a/pkgs/development/python-modules/batinfo/default.nix b/pkgs/development/python-modules/batinfo/default.nix
index 0ed3486272d..17d28c12914 100644
--- a/pkgs/development/python-modules/batinfo/default.nix
+++ b/pkgs/development/python-modules/batinfo/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "batinfo";
diff --git a/pkgs/development/python-modules/bayespy/default.nix b/pkgs/development/python-modules/bayespy/default.nix
index b470d21b1be..6ebe9919ec9 100644
--- a/pkgs/development/python-modules/bayespy/default.nix
+++ b/pkgs/development/python-modules/bayespy/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, pythonOlder
+{ lib, buildPythonPackage, fetchPypi, pythonOlder
 , pytest, nose, glibcLocales
 , numpy, scipy, matplotlib, h5py }:
 
diff --git a/pkgs/development/python-modules/bcdoc/default.nix b/pkgs/development/python-modules/bcdoc/default.nix
index 185fcb86b0b..29c267aa45f 100644
--- a/pkgs/development/python-modules/bcdoc/default.nix
+++ b/pkgs/development/python-modules/bcdoc/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, docutils, six }:
+{ lib, buildPythonPackage, fetchPypi, docutils, six }:
 
 buildPythonPackage rec {
   pname = "bcdoc";
diff --git a/pkgs/development/python-modules/bcrypt/3_1.nix b/pkgs/development/python-modules/bcrypt/3_1.nix
index c70161cf28b..df57eb3cd0c 100644
--- a/pkgs/development/python-modules/bcrypt/3_1.nix
+++ b/pkgs/development/python-modules/bcrypt/3_1.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , isPyPy, cffi, pytest, six }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/bcrypt/default.nix b/pkgs/development/python-modules/bcrypt/default.nix
index e74b0934b30..cfd17262a2b 100644
--- a/pkgs/development/python-modules/bcrypt/default.nix
+++ b/pkgs/development/python-modules/bcrypt/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, isPyPy, fetchPypi, pythonOlder
+{ lib, buildPythonPackage, isPyPy, fetchPypi, pythonOlder
 , cffi, pycparser, mock, pytest, py, six }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/beancount/default.nix b/pkgs/development/python-modules/beancount/default.nix
index fa97c7c97a9..e4a6a5f5625 100644
--- a/pkgs/development/python-modules/beancount/default.nix
+++ b/pkgs/development/python-modules/beancount/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, isPy3k
+{ lib, buildPythonPackage, fetchPypi, isPy3k
 , beautifulsoup4, bottle, chardet, dateutil
 , google_api_python_client, lxml, oauth2client
 , ply, python_magic, pytest, requests }:
diff --git a/pkgs/development/python-modules/beanstalkc/default.nix b/pkgs/development/python-modules/beanstalkc/default.nix
index a74f6c6f8f2..ffdb2f6f8f2 100644
--- a/pkgs/development/python-modules/beanstalkc/default.nix
+++ b/pkgs/development/python-modules/beanstalkc/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, buildPythonPackage }:
+{ lib, fetchFromGitHub, buildPythonPackage }:
 
 buildPythonPackage rec {
   pname = "beanstalkc";
diff --git a/pkgs/development/python-modules/beautifulsoup4/default.nix b/pkgs/development/python-modules/beautifulsoup4/default.nix
index 555669da243..b00c03a09c1 100644
--- a/pkgs/development/python-modules/beautifulsoup4/default.nix
+++ b/pkgs/development/python-modules/beautifulsoup4/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, soupsieve, pytest, python }:
+{ lib, buildPythonPackage, fetchPypi, soupsieve, pytest, python }:
 
 buildPythonPackage rec {
   pname = "beautifulsoup4";
diff --git a/pkgs/development/python-modules/bedup/default.nix b/pkgs/development/python-modules/bedup/default.nix
index f38d4263c24..454a972f177 100644
--- a/pkgs/development/python-modules/bedup/default.nix
+++ b/pkgs/development/python-modules/bedup/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 , btrfs-progs
diff --git a/pkgs/development/python-modules/bellows/default.nix b/pkgs/development/python-modules/bellows/default.nix
index 6ee8b6499b5..d47c5d716a7 100644
--- a/pkgs/development/python-modules/bellows/default.nix
+++ b/pkgs/development/python-modules/bellows/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub
+{ lib, buildPythonPackage, fetchFromGitHub
 , click, click-log, pure-pcapy3
 , pyserial-asyncio, voluptuous, zigpy
 , asynctest, pytestCheckHook, pytest-asyncio }:
diff --git a/pkgs/development/python-modules/bespon/default.nix b/pkgs/development/python-modules/bespon/default.nix
index 555a0a48758..599ad71b241 100644
--- a/pkgs/development/python-modules/bespon/default.nix
+++ b/pkgs/development/python-modules/bespon/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/betamax-matchers/default.nix b/pkgs/development/python-modules/betamax-matchers/default.nix
index 424b8ef4ef3..459d3c51d7e 100644
--- a/pkgs/development/python-modules/betamax-matchers/default.nix
+++ b/pkgs/development/python-modules/betamax-matchers/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , betamax, requests_toolbelt }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/betamax-serializers/default.nix b/pkgs/development/python-modules/betamax-serializers/default.nix
index 3d3cad4d95b..0ddc9845bfa 100644
--- a/pkgs/development/python-modules/betamax-serializers/default.nix
+++ b/pkgs/development/python-modules/betamax-serializers/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , betamax, pyyaml }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/betamax/default.nix b/pkgs/development/python-modules/betamax/default.nix
index 5e1469bfc52..5906a531f22 100644
--- a/pkgs/development/python-modules/betamax/default.nix
+++ b/pkgs/development/python-modules/betamax/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, requests }:
+{ lib, buildPythonPackage, fetchPypi, requests }:
 
 buildPythonPackage rec {
   pname = "betamax";
diff --git a/pkgs/development/python-modules/billiard/default.nix b/pkgs/development/python-modules/billiard/default.nix
index 4f8aa3565da..2d4eabf215e 100644
--- a/pkgs/development/python-modules/billiard/default.nix
+++ b/pkgs/development/python-modules/billiard/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, isPyPy, pytestCheckHook, case, psutil, fetchpatch }:
+{ lib, buildPythonPackage, fetchPypi, isPyPy, pytestCheckHook, case, psutil, fetchpatch }:
 
 buildPythonPackage rec {
   pname = "billiard";
diff --git a/pkgs/development/python-modules/binwalk/default.nix b/pkgs/development/python-modules/binwalk/default.nix
index c2f059dd93d..499d442c822 100644
--- a/pkgs/development/python-modules/binwalk/default.nix
+++ b/pkgs/development/python-modules/binwalk/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 , zlib
diff --git a/pkgs/development/python-modules/bitbucket-api/default.nix b/pkgs/development/python-modules/bitbucket-api/default.nix
index 559661bbb4f..b874f1af525 100644
--- a/pkgs/development/python-modules/bitbucket-api/default.nix
+++ b/pkgs/development/python-modules/bitbucket-api/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, isPy3k
+{ lib, buildPythonPackage, fetchPypi, isPy3k
 , requests_oauthlib, nose, sh }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/bitbucket-cli/default.nix b/pkgs/development/python-modules/bitbucket-cli/default.nix
index 50075fe70fc..bb1fa1d6c17 100644
--- a/pkgs/development/python-modules/bitbucket-cli/default.nix
+++ b/pkgs/development/python-modules/bitbucket-cli/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, isPy3k, requests }:
+{ lib, buildPythonPackage, fetchPypi, isPy3k, requests }:
 
 buildPythonPackage rec {
   pname = "bitbucket-cli";
diff --git a/pkgs/development/python-modules/bitmath/default.nix b/pkgs/development/python-modules/bitmath/default.nix
index 49992c561f7..5643ea29bc2 100644
--- a/pkgs/development/python-modules/bitmath/default.nix
+++ b/pkgs/development/python-modules/bitmath/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, isPy3k, progressbar231, progressbar33, mock }:
+{ lib, buildPythonPackage, fetchPypi, isPy3k, progressbar231, progressbar33, mock }:
 
 buildPythonPackage rec {
   pname = "bitmath";
diff --git a/pkgs/development/python-modules/bitstring/default.nix b/pkgs/development/python-modules/bitstring/default.nix
index d6eaf31056f..ed67f2be5c5 100644
--- a/pkgs/development/python-modules/bitstring/default.nix
+++ b/pkgs/development/python-modules/bitstring/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "bitstring";
diff --git a/pkgs/development/python-modules/bjoern/default.nix b/pkgs/development/python-modules/bjoern/default.nix
index 2949ecbf6f9..ef599d89be2 100644
--- a/pkgs/development/python-modules/bjoern/default.nix
+++ b/pkgs/development/python-modules/bjoern/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, libev, python }:
+{ lib, buildPythonPackage, fetchPypi, libev, python }:
 
 buildPythonPackage rec {
   pname = "bjoern";
diff --git a/pkgs/development/python-modules/black-macchiato/default.nix b/pkgs/development/python-modules/black-macchiato/default.nix
index 536ad1f14b6..80aed4e6fef 100644
--- a/pkgs/development/python-modules/black-macchiato/default.nix
+++ b/pkgs/development/python-modules/black-macchiato/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv,
+{ lib,
   buildPythonPackage,
   fetchFromGitHub,
   pythonOlder,
diff --git a/pkgs/development/python-modules/bleak/default.nix b/pkgs/development/python-modules/bleak/default.nix
index 06dc3217dc8..38390e8377e 100644
--- a/pkgs/development/python-modules/bleak/default.nix
+++ b/pkgs/development/python-modules/bleak/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, isPy3k, fetchPypi, bluez, txdbus, pytest, pytestcov }:
+{ lib, buildPythonPackage, isPy3k, fetchPypi, bluez, txdbus, pytest, pytestcov }:
 
 buildPythonPackage rec {
   pname = "bleak";
diff --git a/pkgs/development/python-modules/blessed/default.nix b/pkgs/development/python-modules/blessed/default.nix
index 7adacecc647..f0167625cf6 100644
--- a/pkgs/development/python-modules/blessed/default.nix
+++ b/pkgs/development/python-modules/blessed/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, fetchpatch, six
+{ lib, buildPythonPackage, fetchPypi, fetchpatch, six
 , wcwidth, pytest, mock, glibcLocales
 }:
 
diff --git a/pkgs/development/python-modules/blessings/default.nix b/pkgs/development/python-modules/blessings/default.nix
index 5263a92ec3d..00b7fd9a63d 100644
--- a/pkgs/development/python-modules/blessings/default.nix
+++ b/pkgs/development/python-modules/blessings/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , six
diff --git a/pkgs/development/python-modules/blinker/default.nix b/pkgs/development/python-modules/blinker/default.nix
index e33ad162631..5591113ab0a 100644
--- a/pkgs/development/python-modules/blinker/default.nix
+++ b/pkgs/development/python-modules/blinker/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "blinker";
diff --git a/pkgs/development/python-modules/blis/default.nix b/pkgs/development/python-modules/blis/default.nix
index eeb62e8fed3..2b8aeb2edcd 100644
--- a/pkgs/development/python-modules/blis/default.nix
+++ b/pkgs/development/python-modules/blis/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , cython
diff --git a/pkgs/development/python-modules/blist/default.nix b/pkgs/development/python-modules/blist/default.nix
index 505f01af5fe..d4dcb54c5cd 100644
--- a/pkgs/development/python-modules/blist/default.nix
+++ b/pkgs/development/python-modules/blist/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchpatch
 , fetchPypi
diff --git a/pkgs/development/python-modules/blivet/default.nix b/pkgs/development/python-modules/blivet/default.nix
index 94abc39fd28..fd97fa20648 100644
--- a/pkgs/development/python-modules/blivet/default.nix
+++ b/pkgs/development/python-modules/blivet/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, buildPythonPackage, pykickstart, pyparted, pyblock
+{ lib, fetchFromGitHub, buildPythonPackage, pykickstart, pyparted, pyblock
 , pyudev, six, libselinux, multipath-tools, lsof, util-linux
 }:
 
diff --git a/pkgs/development/python-modules/block-io/default.nix b/pkgs/development/python-modules/block-io/default.nix
index 3a9704d71bc..b823b8711a5 100644
--- a/pkgs/development/python-modules/block-io/default.nix
+++ b/pkgs/development/python-modules/block-io/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage, base58, ecdsa, pycryptodome, requests, six, setuptools }:
+{ lib, fetchPypi, buildPythonPackage, base58, ecdsa, pycryptodome, requests, six, setuptools }:
 
 buildPythonPackage rec {
   pname = "block-io";
diff --git a/pkgs/development/python-modules/blockdiag/default.nix b/pkgs/development/python-modules/blockdiag/default.nix
index 5adc854d026..f5d8b93c481 100644
--- a/pkgs/development/python-modules/blockdiag/default.nix
+++ b/pkgs/development/python-modules/blockdiag/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub
+{ lib, buildPythonPackage, fetchFromGitHub
 , setuptools, funcparserlib, pillow, webcolors, reportlab, docutils
 }:
 
diff --git a/pkgs/development/python-modules/bluepy/default.nix b/pkgs/development/python-modules/bluepy/default.nix
index d833d20934d..11930050ba3 100644
--- a/pkgs/development/python-modules/bluepy/default.nix
+++ b/pkgs/development/python-modules/bluepy/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pkg-config
diff --git a/pkgs/development/python-modules/boltons/default.nix b/pkgs/development/python-modules/boltons/default.nix
index 13e264340da..f4842981c4a 100644
--- a/pkgs/development/python-modules/boltons/default.nix
+++ b/pkgs/development/python-modules/boltons/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub, pytest }:
+{ lib, buildPythonPackage, fetchFromGitHub, pytest }:
 
 buildPythonPackage rec {
   pname = "boltons";
diff --git a/pkgs/development/python-modules/boltztrap2/default.nix b/pkgs/development/python-modules/boltztrap2/default.nix
index 48bc53bbeed..f80a8deb9ab 100644
--- a/pkgs/development/python-modules/boltztrap2/default.nix
+++ b/pkgs/development/python-modules/boltztrap2/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , spglib
diff --git a/pkgs/development/python-modules/bottle/default.nix b/pkgs/development/python-modules/bottle/default.nix
index 213d69dd989..eeaf34a44eb 100644
--- a/pkgs/development/python-modules/bottle/default.nix
+++ b/pkgs/development/python-modules/bottle/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, setuptools }:
+{ lib, buildPythonPackage, fetchPypi, setuptools }:
 
 buildPythonPackage rec {
   pname = "bottle";
diff --git a/pkgs/development/python-modules/box2d/default.nix b/pkgs/development/python-modules/box2d/default.nix
index 92ac90ab6d4..e6f6a390f37 100644
--- a/pkgs/development/python-modules/box2d/default.nix
+++ b/pkgs/development/python-modules/box2d/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , swig2
diff --git a/pkgs/development/python-modules/bpython/default.nix b/pkgs/development/python-modules/bpython/default.nix
index 108d8ec0c66..8a37ed0bd97 100644
--- a/pkgs/development/python-modules/bpython/default.nix
+++ b/pkgs/development/python-modules/bpython/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , curtsies
diff --git a/pkgs/development/python-modules/bsddb3/default.nix b/pkgs/development/python-modules/bsddb3/default.nix
index 9877a03a087..82459398ca7 100644
--- a/pkgs/development/python-modules/bsddb3/default.nix
+++ b/pkgs/development/python-modules/bsddb3/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pkgs
diff --git a/pkgs/development/python-modules/bsdiff4/default.nix b/pkgs/development/python-modules/bsdiff4/default.nix
index f70f71c1a69..339e649c53a 100644
--- a/pkgs/development/python-modules/bsdiff4/default.nix
+++ b/pkgs/development/python-modules/bsdiff4/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , aflplusplus
diff --git a/pkgs/development/python-modules/bt-proximity/default.nix b/pkgs/development/python-modules/bt-proximity/default.nix
index 209565fa21b..8ac1b977f39 100644
--- a/pkgs/development/python-modules/bt-proximity/default.nix
+++ b/pkgs/development/python-modules/bt-proximity/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub
+{ lib, buildPythonPackage, fetchFromGitHub
 , pybluez }:
 
 buildPythonPackage {
diff --git a/pkgs/development/python-modules/btchip/default.nix b/pkgs/development/python-modules/btchip/default.nix
index ebb14a77b56..3d206c829e8 100644
--- a/pkgs/development/python-modules/btchip/default.nix
+++ b/pkgs/development/python-modules/btchip/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, hidapi, pyscard, ecdsa }:
+{ lib, buildPythonPackage, fetchPypi, hidapi, pyscard, ecdsa }:
 
 buildPythonPackage rec {
   pname = "btchip-python";
diff --git a/pkgs/development/python-modules/btrees/default.nix b/pkgs/development/python-modules/btrees/default.nix
index 471ba54215d..3da6852c54d 100644
--- a/pkgs/development/python-modules/btrees/default.nix
+++ b/pkgs/development/python-modules/btrees/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , fetchPypi
 , buildPythonPackage
 , persistent
diff --git a/pkgs/development/python-modules/btrfs/default.nix b/pkgs/development/python-modules/btrfs/default.nix
index 8ea93fe005e..adaf1f610e3 100644
--- a/pkgs/development/python-modules/btrfs/default.nix
+++ b/pkgs/development/python-modules/btrfs/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/bugsnag/default.nix b/pkgs/development/python-modules/bugsnag/default.nix
index 5e3b0b4e89f..33845368480 100644
--- a/pkgs/development/python-modules/bugsnag/default.nix
+++ b/pkgs/development/python-modules/bugsnag/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pythonOlder
diff --git a/pkgs/development/python-modules/bugwarrior/default.nix b/pkgs/development/python-modules/bugwarrior/default.nix
index 3d27384efe1..c59d2196d20 100644
--- a/pkgs/development/python-modules/bugwarrior/default.nix
+++ b/pkgs/development/python-modules/bugwarrior/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, pythonOlder, setuptools
+{ lib, buildPythonPackage, fetchPypi, pythonOlder, setuptools
 , twiggy, requests, offtrac, bugzilla, taskw, dateutil, pytz, keyring, six
 , jinja2, pycurl, dogpile_cache, lockfile, click, pyxdg, future, jira }:
 
diff --git a/pkgs/development/python-modules/bugz/default.nix b/pkgs/development/python-modules/bugz/default.nix
index 5324a43e1b0..a57e957efe6 100644
--- a/pkgs/development/python-modules/bugz/default.nix
+++ b/pkgs/development/python-modules/bugz/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 }:
diff --git a/pkgs/development/python-modules/bugzilla/default.nix b/pkgs/development/python-modules/bugzilla/default.nix
index fc122ecd233..365f3654298 100644
--- a/pkgs/development/python-modules/bugzilla/default.nix
+++ b/pkgs/development/python-modules/bugzilla/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , pep8, coverage, logilab_common, requests }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/buildout/default.nix b/pkgs/development/python-modules/buildout/default.nix
index 0751b284a78..a9fe66a37ea 100644
--- a/pkgs/development/python-modules/buildout/default.nix
+++ b/pkgs/development/python-modules/buildout/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "zc.buildout";
diff --git a/pkgs/development/python-modules/bumps/default.nix b/pkgs/development/python-modules/bumps/default.nix
index 05f082c747b..7e94bd55b28 100644
--- a/pkgs/development/python-modules/bumps/default.nix
+++ b/pkgs/development/python-modules/bumps/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, six}:
+{ lib, buildPythonPackage, fetchPypi, six}:
 
 buildPythonPackage rec {
   pname = "bumps";
diff --git a/pkgs/development/python-modules/bunch/default.nix b/pkgs/development/python-modules/bunch/default.nix
index ce77085e4f7..2758ff5b418 100644
--- a/pkgs/development/python-modules/bunch/default.nix
+++ b/pkgs/development/python-modules/bunch/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "bunch";
diff --git a/pkgs/development/python-modules/bwapy/default.nix b/pkgs/development/python-modules/bwapy/default.nix
index c736eb577d4..f6c926cf419 100644
--- a/pkgs/development/python-modules/bwapy/default.nix
+++ b/pkgs/development/python-modules/bwapy/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , pythonOlder
 , fetchPypi
diff --git a/pkgs/development/python-modules/cachecontrol/default.nix b/pkgs/development/python-modules/cachecontrol/default.nix
index 53b13ddb568..ba9b9022ac8 100644
--- a/pkgs/development/python-modules/cachecontrol/default.nix
+++ b/pkgs/development/python-modules/cachecontrol/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , requests
diff --git a/pkgs/development/python-modules/cachelib/default.nix b/pkgs/development/python-modules/cachelib/default.nix
index 503b546116e..154c67bb379 100644
--- a/pkgs/development/python-modules/cachelib/default.nix
+++ b/pkgs/development/python-modules/cachelib/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "cachelib";
diff --git a/pkgs/development/python-modules/cachetools/default.nix b/pkgs/development/python-modules/cachetools/default.nix
index 6fd3f637875..56efa9a3485 100644
--- a/pkgs/development/python-modules/cachetools/default.nix
+++ b/pkgs/development/python-modules/cachetools/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, isPy27 }:
+{ lib, buildPythonPackage, fetchPypi, isPy27 }:
 
 buildPythonPackage rec {
   pname = "cachetools";
diff --git a/pkgs/development/python-modules/cairosvg/1_x.nix b/pkgs/development/python-modules/cairosvg/1_x.nix
index bb5629cf4e5..3e1a67f8282 100644
--- a/pkgs/development/python-modules/cairosvg/1_x.nix
+++ b/pkgs/development/python-modules/cairosvg/1_x.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub, cairocffi, nose, fontconfig
+{ lib, buildPythonPackage, fetchFromGitHub, cairocffi, nose, fontconfig
 , cssselect2, defusedxml, pillow, tinycss2 }:
 
 # CairoSVG 2.x dropped support for Python 2 so offer CairoSVG 1.x as an
diff --git a/pkgs/development/python-modules/cairosvg/default.nix b/pkgs/development/python-modules/cairosvg/default.nix
index 9d1c54651c2..53f3ebc0c08 100644
--- a/pkgs/development/python-modules/cairosvg/default.nix
+++ b/pkgs/development/python-modules/cairosvg/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, isPy3k, fetchpatch
+{ lib, buildPythonPackage, fetchPypi, isPy3k, fetchpatch
 , cairocffi, cssselect2, defusedxml, pillow, tinycss2
 , pytest, pytestrunner, pytestcov, pytest-flake8, pytest-isort }:
 
diff --git a/pkgs/development/python-modules/canonicaljson/default.nix b/pkgs/development/python-modules/canonicaljson/default.nix
index 96af6f4bf78..4a4f56f5abf 100644
--- a/pkgs/development/python-modules/canonicaljson/default.nix
+++ b/pkgs/development/python-modules/canonicaljson/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , frozendict, simplejson, six, isPy27
 }:
 
diff --git a/pkgs/development/python-modules/carbon/default.nix b/pkgs/development/python-modules/carbon/default.nix
index e0a31829b05..b651a654d5e 100644
--- a/pkgs/development/python-modules/carbon/default.nix
+++ b/pkgs/development/python-modules/carbon/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, isPy3k
+{ lib, buildPythonPackage, fetchPypi, isPy3k
 , twisted, whisper, txamqp, cachetools, urllib3
 }:
 
diff --git a/pkgs/development/python-modules/carrot/default.nix b/pkgs/development/python-modules/carrot/default.nix
index c2262decd31..a772535ad82 100644
--- a/pkgs/development/python-modules/carrot/default.nix
+++ b/pkgs/development/python-modules/carrot/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , nose, amqplib, anyjson }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/case/default.nix b/pkgs/development/python-modules/case/default.nix
index 5d1a7696516..3f95d9e22af 100644
--- a/pkgs/development/python-modules/case/default.nix
+++ b/pkgs/development/python-modules/case/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , six, nose, unittest2, mock }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/cassandra-driver/default.nix b/pkgs/development/python-modules/cassandra-driver/default.nix
index 32cf844cf00..e1cb9f211bc 100644
--- a/pkgs/development/python-modules/cassandra-driver/default.nix
+++ b/pkgs/development/python-modules/cassandra-driver/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, buildPythonPackage, fetchPypi, python, pythonOlder
+{ lib, buildPythonPackage, fetchPypi, python, pythonOlder
 , cython
 , eventlet
 , futures
diff --git a/pkgs/development/python-modules/casttube/default.nix b/pkgs/development/python-modules/casttube/default.nix
index 85b1147c13a..9d29a013743 100644
--- a/pkgs/development/python-modules/casttube/default.nix
+++ b/pkgs/development/python-modules/casttube/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, requests }:
+{ lib, buildPythonPackage, fetchPypi, requests }:
 
 buildPythonPackage rec {
   pname = "casttube";
diff --git a/pkgs/development/python-modules/catalogue/default.nix b/pkgs/development/python-modules/catalogue/default.nix
index c4cd89cab68..a9c5bae71f4 100644
--- a/pkgs/development/python-modules/catalogue/default.nix
+++ b/pkgs/development/python-modules/catalogue/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pythonOlder
diff --git a/pkgs/development/python-modules/cbor/default.nix b/pkgs/development/python-modules/cbor/default.nix
index f081511265f..cc3d8914ad2 100644
--- a/pkgs/development/python-modules/cbor/default.nix
+++ b/pkgs/development/python-modules/cbor/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "cbor";
diff --git a/pkgs/development/python-modules/cccolutils/default.nix b/pkgs/development/python-modules/cccolutils/default.nix
index 96e75405ee3..e231624e40f 100644
--- a/pkgs/development/python-modules/cccolutils/default.nix
+++ b/pkgs/development/python-modules/cccolutils/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, isPy3k, krb5Full, nose, GitPython, mock, git }:
+{ lib, buildPythonPackage, fetchPypi, isPy3k, krb5Full, nose, GitPython, mock, git }:
 
 buildPythonPackage rec {
   pname = "CCColUtils";
diff --git a/pkgs/development/python-modules/cement/default.nix b/pkgs/development/python-modules/cement/default.nix
index 9133389f0ce..f021ea16b62 100644
--- a/pkgs/development/python-modules/cement/default.nix
+++ b/pkgs/development/python-modules/cement/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, isPy3k }:
+{ lib, buildPythonPackage, fetchPypi, isPy3k }:
 
 buildPythonPackage rec {
   pname = "cement";
diff --git a/pkgs/development/python-modules/cerberus/default.nix b/pkgs/development/python-modules/cerberus/default.nix
index 08b7527c54c..cdf6519d325 100644
--- a/pkgs/development/python-modules/cerberus/default.nix
+++ b/pkgs/development/python-modules/cerberus/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, pytestrunner, pytest }:
+{ lib, buildPythonPackage, fetchPypi, pytestrunner, pytest }:
 
 buildPythonPackage rec {
   pname = "Cerberus";
diff --git a/pkgs/development/python-modules/certipy/default.nix b/pkgs/development/python-modules/certipy/default.nix
index 049e3ffdb5d..a3cde807076 100644
--- a/pkgs/development/python-modules/certipy/default.nix
+++ b/pkgs/development/python-modules/certipy/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pyopenssl
diff --git a/pkgs/development/python-modules/cgroup-utils/default.nix b/pkgs/development/python-modules/cgroup-utils/default.nix
index 2000a4e0a3b..8b3a6afa9b3 100644
--- a/pkgs/development/python-modules/cgroup-utils/default.nix
+++ b/pkgs/development/python-modules/cgroup-utils/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub, pep8, nose }:
+{ lib, buildPythonPackage, fetchFromGitHub, pep8, nose }:
 
 buildPythonPackage rec {
   version = "0.8";
diff --git a/pkgs/development/python-modules/chai/default.nix b/pkgs/development/python-modules/chai/default.nix
index 3400b33635a..9f9d48d9017 100644
--- a/pkgs/development/python-modules/chai/default.nix
+++ b/pkgs/development/python-modules/chai/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "chai";
diff --git a/pkgs/development/python-modules/chainmap/default.nix b/pkgs/development/python-modules/chainmap/default.nix
index 3858fc44f23..4619bff2b04 100644
--- a/pkgs/development/python-modules/chainmap/default.nix
+++ b/pkgs/development/python-modules/chainmap/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "chainmap";
diff --git a/pkgs/development/python-modules/chameleon/default.nix b/pkgs/development/python-modules/chameleon/default.nix
index a2ffcb9a023..fccfec53512 100644
--- a/pkgs/development/python-modules/chameleon/default.nix
+++ b/pkgs/development/python-modules/chameleon/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 }:
diff --git a/pkgs/development/python-modules/channels-redis/default.nix b/pkgs/development/python-modules/channels-redis/default.nix
index 3f341f5527a..1e267aa5126 100644
--- a/pkgs/development/python-modules/channels-redis/default.nix
+++ b/pkgs/development/python-modules/channels-redis/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , aioredis
 , asgiref
 , buildPythonPackage
diff --git a/pkgs/development/python-modules/channels/default.nix b/pkgs/development/python-modules/channels/default.nix
index c2836ef4faa..0f5e708d091 100644
--- a/pkgs/development/python-modules/channels/default.nix
+++ b/pkgs/development/python-modules/channels/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi,
+{ lib, buildPythonPackage, fetchPypi,
   asgiref, django, daphne
 }:
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/chardet/default.nix b/pkgs/development/python-modules/chardet/default.nix
index bbc41df0cd8..65381d40268 100644
--- a/pkgs/development/python-modules/chardet/default.nix
+++ b/pkgs/development/python-modules/chardet/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, fetchpatch
+{ lib, buildPythonPackage, fetchPypi, fetchpatch
 , pytest, pytestrunner, hypothesis }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/check-manifest/default.nix b/pkgs/development/python-modules/check-manifest/default.nix
index 8a2c7488206..95bb9660d4c 100644
--- a/pkgs/development/python-modules/check-manifest/default.nix
+++ b/pkgs/development/python-modules/check-manifest/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, pep517, toml, mock, breezy, git, build }:
+{ lib, buildPythonPackage, fetchPypi, pep517, toml, mock, breezy, git, build }:
 
 buildPythonPackage rec {
   pname = "check-manifest";
diff --git a/pkgs/development/python-modules/cjson/default.nix b/pkgs/development/python-modules/cjson/default.nix
index ce70a2f459d..d34534e3eb8 100644
--- a/pkgs/development/python-modules/cjson/default.nix
+++ b/pkgs/development/python-modules/cjson/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, isPy3k, isPyPy }:
+{ lib, buildPythonPackage, fetchPypi, isPy3k, isPyPy }:
 
 buildPythonPackage rec {
   pname = "python-cjson";
diff --git a/pkgs/development/python-modules/ckcc-protocol/default.nix b/pkgs/development/python-modules/ckcc-protocol/default.nix
index dd72f5705e7..eaf89948e8f 100644
--- a/pkgs/development/python-modules/ckcc-protocol/default.nix
+++ b/pkgs/development/python-modules/ckcc-protocol/default.nix
@@ -1,9 +1,8 @@
-{ stdenv
+{ lib
 , buildPythonPackage
 , click
 , ecdsa
 , hidapi
-, lib
 , fetchPypi
 , pytest
 , pyaes
diff --git a/pkgs/development/python-modules/clf/default.nix b/pkgs/development/python-modules/clf/default.nix
index f4168d689d4..978d08051f7 100644
--- a/pkgs/development/python-modules/clf/default.nix
+++ b/pkgs/development/python-modules/clf/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , docopt, requests, pygments }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/cliapp/default.nix b/pkgs/development/python-modules/cliapp/default.nix
index 4b7611c092e..e410a37fcb4 100644
--- a/pkgs/development/python-modules/cliapp/default.nix
+++ b/pkgs/development/python-modules/cliapp/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchgit
 , sphinx
diff --git a/pkgs/development/python-modules/click-completion/default.nix b/pkgs/development/python-modules/click-completion/default.nix
index 61a15428632..19fdac37615 100644
--- a/pkgs/development/python-modules/click-completion/default.nix
+++ b/pkgs/development/python-modules/click-completion/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, isPy3k,
+{ lib, buildPythonPackage, fetchPypi, isPy3k,
   click, jinja2, shellingham, six
 }:
 
diff --git a/pkgs/development/python-modules/click-didyoumean/default.nix b/pkgs/development/python-modules/click-didyoumean/default.nix
index 8d3c3ba3e24..c4574072b4c 100644
--- a/pkgs/development/python-modules/click-didyoumean/default.nix
+++ b/pkgs/development/python-modules/click-didyoumean/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi,
+{ lib, buildPythonPackage, fetchPypi,
   click
 }:
 
diff --git a/pkgs/development/python-modules/click-help-colors/default.nix b/pkgs/development/python-modules/click-help-colors/default.nix
index dbe4e33ca84..b17dc1a0c11 100644
--- a/pkgs/development/python-modules/click-help-colors/default.nix
+++ b/pkgs/development/python-modules/click-help-colors/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage
+{ lib, fetchPypi, buildPythonPackage
 , click, pytest
 }:
 
diff --git a/pkgs/development/python-modules/click-log/default.nix b/pkgs/development/python-modules/click-log/default.nix
index 4aa63dd4537..3145d4775e3 100644
--- a/pkgs/development/python-modules/click-log/default.nix
+++ b/pkgs/development/python-modules/click-log/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, click }:
+{ lib, buildPythonPackage, fetchPypi, click }:
 
 buildPythonPackage rec {
   pname = "click-log";
diff --git a/pkgs/development/python-modules/click-plugins/default.nix b/pkgs/development/python-modules/click-plugins/default.nix
index c2b25341e17..31ae00a348d 100644
--- a/pkgs/development/python-modules/click-plugins/default.nix
+++ b/pkgs/development/python-modules/click-plugins/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi,
+{ lib, buildPythonPackage, fetchPypi,
   click, pytest
 }:
 
diff --git a/pkgs/development/python-modules/click-repl/default.nix b/pkgs/development/python-modules/click-repl/default.nix
index 23adb12da65..ee8773999ff 100644
--- a/pkgs/development/python-modules/click-repl/default.nix
+++ b/pkgs/development/python-modules/click-repl/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, click, prompt_toolkit }:
+{ lib, buildPythonPackage, fetchPypi, click, prompt_toolkit }:
 
 buildPythonPackage rec {
   pname = "click-repl";
diff --git a/pkgs/development/python-modules/clickclick/default.nix b/pkgs/development/python-modules/clickclick/default.nix
index e211b955ac8..d829f43dc0d 100644
--- a/pkgs/development/python-modules/clickclick/default.nix
+++ b/pkgs/development/python-modules/clickclick/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, buildPythonPackage, fetchFromGitHub, isPy36, flake8, click, pyyaml, six, pytestCheckHook, pytestcov }:
+{ lib, buildPythonPackage, fetchFromGitHub, isPy36, flake8, click, pyyaml, six, pytestCheckHook, pytestcov }:
 
 buildPythonPackage rec {
   pname = "clickclick";
diff --git a/pkgs/development/python-modules/cligj/default.nix b/pkgs/development/python-modules/cligj/default.nix
index f9d953d8536..b44f4e0ec17 100644
--- a/pkgs/development/python-modules/cligj/default.nix
+++ b/pkgs/development/python-modules/cligj/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub
+{ lib, buildPythonPackage, fetchFromGitHub
 , click, pytest, glibcLocales
 }:
 
diff --git a/pkgs/development/python-modules/clint/default.nix b/pkgs/development/python-modules/clint/default.nix
index 133fc0de55c..66e2d5f52f3 100644
--- a/pkgs/development/python-modules/clint/default.nix
+++ b/pkgs/development/python-modules/clint/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , python
diff --git a/pkgs/development/python-modules/clize/default.nix b/pkgs/development/python-modules/clize/default.nix
index c9c3f5c905c..1418db69a39 100644
--- a/pkgs/development/python-modules/clize/default.nix
+++ b/pkgs/development/python-modules/clize/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , dateutil
diff --git a/pkgs/development/python-modules/closure-linter/default.nix b/pkgs/development/python-modules/closure-linter/default.nix
index 75f5ba0b449..18782fb50bb 100644
--- a/pkgs/development/python-modules/closure-linter/default.nix
+++ b/pkgs/development/python-modules/closure-linter/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchgit
 , isPy3k
diff --git a/pkgs/development/python-modules/cloudpickle/default.nix b/pkgs/development/python-modules/cloudpickle/default.nix
index e5b4a63a564..f525b6e7f1d 100644
--- a/pkgs/development/python-modules/cloudpickle/default.nix
+++ b/pkgs/development/python-modules/cloudpickle/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, isPy27, pytest, mock }:
+{ lib, buildPythonPackage, fetchPypi, isPy27, pytest, mock }:
 
 buildPythonPackage rec {
   pname = "cloudpickle";
diff --git a/pkgs/development/python-modules/clustershell/default.nix b/pkgs/development/python-modules/clustershell/default.nix
index a0e744f9919..d247cecdfa6 100644
--- a/pkgs/development/python-modules/clustershell/default.nix
+++ b/pkgs/development/python-modules/clustershell/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, pyyaml, openssh
+{ lib, buildPythonPackage, fetchPypi, pyyaml, openssh
 , nose, bc, hostname, coreutils, bash, gnused
 }:
 
diff --git a/pkgs/development/python-modules/cmdline/default.nix b/pkgs/development/python-modules/cmdline/default.nix
index 4249ed7164b..71273ed1a22 100644
--- a/pkgs/development/python-modules/cmdline/default.nix
+++ b/pkgs/development/python-modules/cmdline/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, pyyaml }:
+{ lib, buildPythonPackage, fetchPypi, pyyaml }:
 
 buildPythonPackage rec {
   pname = "cmdline";
diff --git a/pkgs/development/python-modules/cmdtest/default.nix b/pkgs/development/python-modules/cmdtest/default.nix
index 5bb4ef79a20..28d78203b6d 100644
--- a/pkgs/development/python-modules/cmdtest/default.nix
+++ b/pkgs/development/python-modules/cmdtest/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchurl
 , cliapp
diff --git a/pkgs/development/python-modules/cocotb/default.nix b/pkgs/development/python-modules/cocotb/default.nix
index e95900d17b5..9cbf86ab1cf 100644
--- a/pkgs/development/python-modules/cocotb/default.nix
+++ b/pkgs/development/python-modules/cocotb/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub, setuptools, swig, verilog }:
+{ lib, buildPythonPackage, fetchFromGitHub, setuptools, swig, verilog }:
 
 buildPythonPackage rec {
   pname = "cocotb";
diff --git a/pkgs/development/python-modules/cogapp/default.nix b/pkgs/development/python-modules/cogapp/default.nix
index 019faeaebc3..c996c23d9ae 100644
--- a/pkgs/development/python-modules/cogapp/default.nix
+++ b/pkgs/development/python-modules/cogapp/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "cogapp";
diff --git a/pkgs/development/python-modules/coilmq/default.nix b/pkgs/development/python-modules/coilmq/default.nix
index bc0b6af146a..b21ea193cbf 100644
--- a/pkgs/development/python-modules/coilmq/default.nix
+++ b/pkgs/development/python-modules/coilmq/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , stompclient, python-daemon, redis, pid, pytest, six, click, coverage
 , sqlalchemy }:
 
diff --git a/pkgs/development/python-modules/colanderalchemy/default.nix b/pkgs/development/python-modules/colanderalchemy/default.nix
index a5b29af1c31..a3fa33f327c 100644
--- a/pkgs/development/python-modules/colanderalchemy/default.nix
+++ b/pkgs/development/python-modules/colanderalchemy/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , unittest2
diff --git a/pkgs/development/python-modules/colorama/default.nix b/pkgs/development/python-modules/colorama/default.nix
index 6778c6acadb..1d472035b2f 100644
--- a/pkgs/development/python-modules/colorama/default.nix
+++ b/pkgs/development/python-modules/colorama/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage }:
+{ lib, fetchPypi, buildPythonPackage }:
 
 buildPythonPackage rec {
   pname = "colorama";
diff --git a/pkgs/development/python-modules/colorcet/default.nix b/pkgs/development/python-modules/colorcet/default.nix
index 303d244fff3..6198e4e1b28 100644
--- a/pkgs/development/python-modules/colorcet/default.nix
+++ b/pkgs/development/python-modules/colorcet/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , param
diff --git a/pkgs/development/python-modules/colorclass/default.nix b/pkgs/development/python-modules/colorclass/default.nix
index 08da356e222..50a052ec1f9 100644
--- a/pkgs/development/python-modules/colorclass/default.nix
+++ b/pkgs/development/python-modules/colorclass/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "colorclass";
diff --git a/pkgs/development/python-modules/colored/default.nix b/pkgs/development/python-modules/colored/default.nix
index 5caa0cad2f6..502f31aa9b8 100644
--- a/pkgs/development/python-modules/colored/default.nix
+++ b/pkgs/development/python-modules/colored/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/colour/default.nix b/pkgs/development/python-modules/colour/default.nix
index 6a6ad9d4946..f7419666f53 100644
--- a/pkgs/development/python-modules/colour/default.nix
+++ b/pkgs/development/python-modules/colour/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, d2to1 }:
+{ lib, buildPythonPackage, fetchPypi, d2to1 }:
 
 buildPythonPackage rec {
   pname = "colour";
diff --git a/pkgs/development/python-modules/configobj/default.nix b/pkgs/development/python-modules/configobj/default.nix
index d0988689275..746c5f35f25 100644
--- a/pkgs/development/python-modules/configobj/default.nix
+++ b/pkgs/development/python-modules/configobj/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage
+{ lib, buildPythonPackage
 , fetchFromGitHub
 , six
 , mock, pytest
diff --git a/pkgs/development/python-modules/configshell/default.nix b/pkgs/development/python-modules/configshell/default.nix
index ba3700962bf..a41d077f22d 100644
--- a/pkgs/development/python-modules/configshell/default.nix
+++ b/pkgs/development/python-modules/configshell/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, buildPythonPackage, pyparsing, six, urwid }:
+{ lib, fetchFromGitHub, buildPythonPackage, pyparsing, six, urwid }:
 
 buildPythonPackage rec {
   pname = "configshell";
diff --git a/pkgs/development/python-modules/confluent-kafka/default.nix b/pkgs/development/python-modules/confluent-kafka/default.nix
index f3e8b1c943b..cd2ddf9da69 100644
--- a/pkgs/development/python-modules/confluent-kafka/default.nix
+++ b/pkgs/development/python-modules/confluent-kafka/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, isPy3k, rdkafka, requests, avro3k, avro, futures, enum34 }:
+{ lib, buildPythonPackage, fetchPypi, isPy3k, rdkafka, requests, avro3k, avro, futures, enum34 }:
 
 buildPythonPackage rec {
   version = "1.5.0";
diff --git a/pkgs/development/python-modules/constantly/default.nix b/pkgs/development/python-modules/constantly/default.nix
index 189573699b9..e3a9c642f47 100644
--- a/pkgs/development/python-modules/constantly/default.nix
+++ b/pkgs/development/python-modules/constantly/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 }:
 buildPythonPackage rec {
   pname = "constantly";
diff --git a/pkgs/development/python-modules/consul/default.nix b/pkgs/development/python-modules/consul/default.nix
index 3978b14484a..a3b92ee7255 100644
--- a/pkgs/development/python-modules/consul/default.nix
+++ b/pkgs/development/python-modules/consul/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , requests, six, pytest }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/contexter/default.nix b/pkgs/development/python-modules/contexter/default.nix
index d8b74d4fedb..9937d4b4752 100644
--- a/pkgs/development/python-modules/contexter/default.nix
+++ b/pkgs/development/python-modules/contexter/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "contexter";
diff --git a/pkgs/development/python-modules/convertdate/default.nix b/pkgs/development/python-modules/convertdate/default.nix
index f28923002f7..60eedd3ec17 100644
--- a/pkgs/development/python-modules/convertdate/default.nix
+++ b/pkgs/development/python-modules/convertdate/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub, pymeeus, pytz }:
+{ lib, buildPythonPackage, fetchFromGitHub, pymeeus, pytz }:
 
 buildPythonPackage rec {
   pname = "convertdate";
diff --git a/pkgs/development/python-modules/cookiecutter/default.nix b/pkgs/development/python-modules/cookiecutter/default.nix
index f9a4fe98208..c5ee4d8617d 100644
--- a/pkgs/development/python-modules/cookiecutter/default.nix
+++ b/pkgs/development/python-modules/cookiecutter/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, isPyPy
+{ lib, buildPythonPackage, fetchPypi, isPyPy
 , pytest, pytestcov, pytest-mock, freezegun
 , jinja2, future, binaryornot, click, whichcraft, poyo, jinja2_time, requests
 , python-slugify }:
diff --git a/pkgs/development/python-modules/cookies/default.nix b/pkgs/development/python-modules/cookies/default.nix
index 59d2214f758..a4e35dac346 100644
--- a/pkgs/development/python-modules/cookies/default.nix
+++ b/pkgs/development/python-modules/cookies/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "cookies";
diff --git a/pkgs/development/python-modules/coreapi/default.nix b/pkgs/development/python-modules/coreapi/default.nix
index 8ac69a45739..8b957fee4f6 100644
--- a/pkgs/development/python-modules/coreapi/default.nix
+++ b/pkgs/development/python-modules/coreapi/default.nix
@@ -1,5 +1,5 @@
 {
-  lib, stdenv,
+  lib,
   fetchFromGitHub,
   buildPythonPackage,
   django,
diff --git a/pkgs/development/python-modules/coreschema/default.nix b/pkgs/development/python-modules/coreschema/default.nix
index 73167dea8a7..65bdee5a8da 100644
--- a/pkgs/development/python-modules/coreschema/default.nix
+++ b/pkgs/development/python-modules/coreschema/default.nix
@@ -1,5 +1,5 @@
 {
-  lib, stdenv,
+  lib,
   fetchFromGitHub,
   buildPythonPackage,
   jinja2,
diff --git a/pkgs/development/python-modules/cornice/default.nix b/pkgs/development/python-modules/cornice/default.nix
index 10c55920193..6c488a271e2 100644
--- a/pkgs/development/python-modules/cornice/default.nix
+++ b/pkgs/development/python-modules/cornice/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pyramid
diff --git a/pkgs/development/python-modules/cov-core/default.nix b/pkgs/development/python-modules/cov-core/default.nix
index 44461a8ca9f..ce3b08fbc9f 100644
--- a/pkgs/development/python-modules/cov-core/default.nix
+++ b/pkgs/development/python-modules/cov-core/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, coverage }:
+{ lib, buildPythonPackage, fetchPypi, coverage }:
 
 buildPythonPackage rec {
   pname = "cov-core";
diff --git a/pkgs/development/python-modules/cppheaderparser/default.nix b/pkgs/development/python-modules/cppheaderparser/default.nix
index b51499de449..7602132c24a 100644
--- a/pkgs/development/python-modules/cppheaderparser/default.nix
+++ b/pkgs/development/python-modules/cppheaderparser/default.nix
@@ -1,7 +1,7 @@
 { buildPythonPackage
 , fetchPypi
 , ply
-, lib, stdenv
+, lib
 }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/crate/default.nix b/pkgs/development/python-modules/crate/default.nix
index 37e49210009..a37160a01ac 100644
--- a/pkgs/development/python-modules/crate/default.nix
+++ b/pkgs/development/python-modules/crate/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , fetchPypi
 , buildPythonPackage
 , urllib3
diff --git a/pkgs/development/python-modules/crayons/default.nix b/pkgs/development/python-modules/crayons/default.nix
index c93bf71687f..53caec66596 100644
--- a/pkgs/development/python-modules/crayons/default.nix
+++ b/pkgs/development/python-modules/crayons/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage, colorama }:
+{ lib, fetchPypi, buildPythonPackage, colorama }:
 
 buildPythonPackage rec {
   pname = "crayons";
diff --git a/pkgs/development/python-modules/crc16/default.nix b/pkgs/development/python-modules/crc16/default.nix
index 1e3c9cbbf4f..ebf86a3571c 100644
--- a/pkgs/development/python-modules/crc16/default.nix
+++ b/pkgs/development/python-modules/crc16/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "crc16";
diff --git a/pkgs/development/python-modules/crccheck/default.nix b/pkgs/development/python-modules/crccheck/default.nix
index 8dc03801285..1762d60dfde 100644
--- a/pkgs/development/python-modules/crccheck/default.nix
+++ b/pkgs/development/python-modules/crccheck/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, isPy3k
+{ lib, buildPythonPackage, fetchPypi, isPy3k
 , nose }:
 
 let
diff --git a/pkgs/development/python-modules/crcmod/default.nix b/pkgs/development/python-modules/crcmod/default.nix
index 488b723d89f..082369baf73 100644
--- a/pkgs/development/python-modules/crcmod/default.nix
+++ b/pkgs/development/python-modules/crcmod/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "crcmod";
diff --git a/pkgs/development/python-modules/credstash/default.nix b/pkgs/development/python-modules/credstash/default.nix
index ca5e1fe334a..0267aee7610 100644
--- a/pkgs/development/python-modules/credstash/default.nix
+++ b/pkgs/development/python-modules/credstash/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, cryptography, boto3, pyyaml, docutils, pytest, fetchpatch }:
+{ lib, buildPythonPackage, fetchPypi, cryptography, boto3, pyyaml, docutils, pytest, fetchpatch }:
 
 buildPythonPackage rec {
   pname = "credstash";
diff --git a/pkgs/development/python-modules/cryptacular/default.nix b/pkgs/development/python-modules/cryptacular/default.nix
index dc97e96e4f5..dccfddaea1a 100644
--- a/pkgs/development/python-modules/cryptacular/default.nix
+++ b/pkgs/development/python-modules/cryptacular/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, isPy27, pythonAtLeast
+{ lib, buildPythonPackage, fetchPypi, isPy27, pythonAtLeast
 , coverage, nose, pbkdf2 }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/cssmin/default.nix b/pkgs/development/python-modules/cssmin/default.nix
index a6f6f3c956a..929640a7c1e 100644
--- a/pkgs/development/python-modules/cssmin/default.nix
+++ b/pkgs/development/python-modules/cssmin/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "cssmin";
diff --git a/pkgs/development/python-modules/cssselect/default.nix b/pkgs/development/python-modules/cssselect/default.nix
index fe13fa9582e..04b6dc36afa 100644
--- a/pkgs/development/python-modules/cssselect/default.nix
+++ b/pkgs/development/python-modules/cssselect/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "cssselect";
diff --git a/pkgs/development/python-modules/cssutils/default.nix b/pkgs/development/python-modules/cssutils/default.nix
index ea3ac6236e9..a12fbf48c82 100644
--- a/pkgs/development/python-modules/cssutils/default.nix
+++ b/pkgs/development/python-modules/cssutils/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, mock }:
+{ lib, buildPythonPackage, fetchPypi, mock }:
 
 buildPythonPackage rec {
   pname = "cssutils";
diff --git a/pkgs/development/python-modules/cupy/default.nix b/pkgs/development/python-modules/cupy/default.nix
index 09685d392d6..23e6ef45b50 100644
--- a/pkgs/development/python-modules/cupy/default.nix
+++ b/pkgs/development/python-modules/cupy/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage
+{ lib, buildPythonPackage
 , fetchPypi, isPy3k, linuxPackages
 , fastrlock, numpy, six, wheel, pytest, mock, setuptools
 , cudatoolkit, cudnn, nccl
diff --git a/pkgs/development/python-modules/curtsies/default.nix b/pkgs/development/python-modules/curtsies/default.nix
index 4c4c7dbe231..62f1435df30 100644
--- a/pkgs/development/python-modules/curtsies/default.nix
+++ b/pkgs/development/python-modules/curtsies/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, fetchpatch, pythonOlder, blessings, mock, nose, pyte, wcwidth, typing }:
+{ lib, buildPythonPackage, fetchPypi, fetchpatch, pythonOlder, blessings, mock, nose, pyte, wcwidth, typing }:
 
 buildPythonPackage rec {
   pname = "curtsies";
diff --git a/pkgs/development/python-modules/curve25519-donna/default.nix b/pkgs/development/python-modules/curve25519-donna/default.nix
index e42f4021a6f..7698b5d6571 100644
--- a/pkgs/development/python-modules/curve25519-donna/default.nix
+++ b/pkgs/development/python-modules/curve25519-donna/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "curve25519-donna";
diff --git a/pkgs/development/python-modules/cvxopt/default.nix b/pkgs/development/python-modules/cvxopt/default.nix
index bafa75072f7..9270effcaa9 100644
--- a/pkgs/development/python-modules/cvxopt/default.nix
+++ b/pkgs/development/python-modules/cvxopt/default.nix
@@ -1,5 +1,4 @@
-{ stdenv
-, lib
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPyPy
diff --git a/pkgs/development/python-modules/cx_freeze/default.nix b/pkgs/development/python-modules/cx_freeze/default.nix
index 14a585617c6..1c3ee689299 100644
--- a/pkgs/development/python-modules/cx_freeze/default.nix
+++ b/pkgs/development/python-modules/cx_freeze/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, pythonOlder, fetchPypi, ncurses, importlib-metadata }:
+{ lib, buildPythonPackage, pythonOlder, fetchPypi, ncurses, importlib-metadata }:
 
 buildPythonPackage rec {
   pname = "cx_Freeze";
diff --git a/pkgs/development/python-modules/cx_oracle/default.nix b/pkgs/development/python-modules/cx_oracle/default.nix
index 89946964544..c81443e0990 100644
--- a/pkgs/development/python-modules/cx_oracle/default.nix
+++ b/pkgs/development/python-modules/cx_oracle/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, odpic }:
+{ lib, buildPythonPackage, fetchPypi, odpic }:
 
 buildPythonPackage rec {
   pname = "cx_Oracle";
diff --git a/pkgs/development/python-modules/cymem/default.nix b/pkgs/development/python-modules/cymem/default.nix
index d805ba5de1f..c2de6d82a5b 100644
--- a/pkgs/development/python-modules/cymem/default.nix
+++ b/pkgs/development/python-modules/cymem/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 , cython
diff --git a/pkgs/development/python-modules/cypari2/default.nix b/pkgs/development/python-modules/cypari2/default.nix
index 8a0adb3d6c9..a7115d1e940 100644
--- a/pkgs/development/python-modules/cypari2/default.nix
+++ b/pkgs/development/python-modules/cypari2/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , python
 , fetchPypi
diff --git a/pkgs/development/python-modules/daemonize/default.nix b/pkgs/development/python-modules/daemonize/default.nix
index 30d4f1bd714..26f23b7156d 100644
--- a/pkgs/development/python-modules/daemonize/default.nix
+++ b/pkgs/development/python-modules/daemonize/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/darcsver/default.nix b/pkgs/development/python-modules/darcsver/default.nix
index 6484d84253b..c46337981bd 100644
--- a/pkgs/development/python-modules/darcsver/default.nix
+++ b/pkgs/development/python-modules/darcsver/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, isPy3k, mock }:
+{ lib, buildPythonPackage, fetchPypi, isPy3k, mock }:
 
 buildPythonPackage rec {
   pname = "darcsver";
diff --git a/pkgs/development/python-modules/dask-glm/default.nix b/pkgs/development/python-modules/dask-glm/default.nix
index 1db03b66ffb..86bc2da1565 100644
--- a/pkgs/development/python-modules/dask-glm/default.nix
+++ b/pkgs/development/python-modules/dask-glm/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , cloudpickle
diff --git a/pkgs/development/python-modules/dask-image/default.nix b/pkgs/development/python-modules/dask-image/default.nix
index eac503c2f85..a3cc7b6afda 100644
--- a/pkgs/development/python-modules/dask-image/default.nix
+++ b/pkgs/development/python-modules/dask-image/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , fetchpatch
diff --git a/pkgs/development/python-modules/dask-jobqueue/default.nix b/pkgs/development/python-modules/dask-jobqueue/default.nix
index be27399b71f..f4f5c03858a 100644
--- a/pkgs/development/python-modules/dask-jobqueue/default.nix
+++ b/pkgs/development/python-modules/dask-jobqueue/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , dask
diff --git a/pkgs/development/python-modules/dask-ml/default.nix b/pkgs/development/python-modules/dask-ml/default.nix
index 4d3aa8e79a0..4836fe35d18 100644
--- a/pkgs/development/python-modules/dask-ml/default.nix
+++ b/pkgs/development/python-modules/dask-ml/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pythonOlder
diff --git a/pkgs/development/python-modules/dask-mpi/default.nix b/pkgs/development/python-modules/dask-mpi/default.nix
index f2d8737b38e..1bec4c82872 100644
--- a/pkgs/development/python-modules/dask-mpi/default.nix
+++ b/pkgs/development/python-modules/dask-mpi/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , dask
diff --git a/pkgs/development/python-modules/dask-xgboost/default.nix b/pkgs/development/python-modules/dask-xgboost/default.nix
index c60f628d72e..4e64b8c9f0c 100644
--- a/pkgs/development/python-modules/dask-xgboost/default.nix
+++ b/pkgs/development/python-modules/dask-xgboost/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , xgboost
diff --git a/pkgs/development/python-modules/databricks-cli/default.nix b/pkgs/development/python-modules/databricks-cli/default.nix
index 30001b781d2..483c565536d 100644
--- a/pkgs/development/python-modules/databricks-cli/default.nix
+++ b/pkgs/development/python-modules/databricks-cli/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , click
 , requests
 , tabulate
diff --git a/pkgs/development/python-modules/dataclasses/default.nix b/pkgs/development/python-modules/dataclasses/default.nix
index a88995937d8..c276e9d000b 100644
--- a/pkgs/development/python-modules/dataclasses/default.nix
+++ b/pkgs/development/python-modules/dataclasses/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, isPy36 }:
+{ lib, buildPythonPackage, fetchPypi, isPy36 }:
 
 buildPythonPackage rec {
   pname = "dataclasses";
diff --git a/pkgs/development/python-modules/datadiff/default.nix b/pkgs/development/python-modules/datadiff/default.nix
index 68046235227..4124457586c 100644
--- a/pkgs/development/python-modules/datadiff/default.nix
+++ b/pkgs/development/python-modules/datadiff/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , nose
diff --git a/pkgs/development/python-modules/datamodeldict/default.nix b/pkgs/development/python-modules/datamodeldict/default.nix
index f3eab1d1d4e..551b1096222 100644
--- a/pkgs/development/python-modules/datamodeldict/default.nix
+++ b/pkgs/development/python-modules/datamodeldict/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , xmltodict
diff --git a/pkgs/development/python-modules/dateutil/default.nix b/pkgs/development/python-modules/dateutil/default.nix
index a6aca68ef29..dcad0c3698a 100644
--- a/pkgs/development/python-modules/dateutil/default.nix
+++ b/pkgs/development/python-modules/dateutil/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, six, setuptools_scm, pytest }:
+{ lib, buildPythonPackage, fetchPypi, six, setuptools_scm, pytest }:
 buildPythonPackage rec {
   pname = "python-dateutil";
   version = "2.8.1";
diff --git a/pkgs/development/python-modules/datrie/default.nix b/pkgs/development/python-modules/datrie/default.nix
index c7f74730c16..d8bbc96fcc4 100644
--- a/pkgs/development/python-modules/datrie/default.nix
+++ b/pkgs/development/python-modules/datrie/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, fetchpatch
+{ lib, buildPythonPackage, fetchPypi, fetchpatch
 , cython, pytest, pytestrunner, hypothesis }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/dbf/default.nix b/pkgs/development/python-modules/dbf/default.nix
index b9c264a2015..18560734bd8 100644
--- a/pkgs/development/python-modules/dbf/default.nix
+++ b/pkgs/development/python-modules/dbf/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage, aenum, isPy3k, pythonOlder, enum34, python }:
+{ lib, fetchPypi, buildPythonPackage, aenum, isPy3k, pythonOlder, enum34, python }:
 
 buildPythonPackage rec {
     pname = "dbf";
diff --git a/pkgs/development/python-modules/dbfread/default.nix b/pkgs/development/python-modules/dbfread/default.nix
index 9f78f3fdde1..1708a75fc10 100644
--- a/pkgs/development/python-modules/dbfread/default.nix
+++ b/pkgs/development/python-modules/dbfread/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage }:
+{ lib, fetchPypi, buildPythonPackage }:
 
 buildPythonPackage rec {
     pname = "dbfread";
diff --git a/pkgs/development/python-modules/dbus-next/default.nix b/pkgs/development/python-modules/dbus-next/default.nix
index 76385ac8023..d7cf79f9d07 100644
--- a/pkgs/development/python-modules/dbus-next/default.nix
+++ b/pkgs/development/python-modules/dbus-next/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 , python
diff --git a/pkgs/development/python-modules/dbutils/default.nix b/pkgs/development/python-modules/dbutils/default.nix
index 42ae779e0d2..848e5038af8 100644
--- a/pkgs/development/python-modules/dbutils/default.nix
+++ b/pkgs/development/python-modules/dbutils/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, pytestCheckHook }:
+{ lib, buildPythonPackage, fetchPypi, pytestCheckHook }:
 
 buildPythonPackage rec {
   version = "2.0";
diff --git a/pkgs/development/python-modules/dcmstack/default.nix b/pkgs/development/python-modules/dcmstack/default.nix
index a6669d0e30d..ee554a6e2bd 100644
--- a/pkgs/development/python-modules/dcmstack/default.nix
+++ b/pkgs/development/python-modules/dcmstack/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 , pythonAtLeast
diff --git a/pkgs/development/python-modules/deap/default.nix b/pkgs/development/python-modules/deap/default.nix
index 21dc9d3832c..f260727b87a 100644
--- a/pkgs/development/python-modules/deap/default.nix
+++ b/pkgs/development/python-modules/deap/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, python, numpy, matplotlib, nose }:
+{ lib, buildPythonPackage, fetchPypi, python, numpy, matplotlib, nose }:
 
 buildPythonPackage rec {
   pname = "deap";
diff --git a/pkgs/development/python-modules/deluge-client/default.nix b/pkgs/development/python-modules/deluge-client/default.nix
index a271371e22f..4426fe65bf5 100644
--- a/pkgs/development/python-modules/deluge-client/default.nix
+++ b/pkgs/development/python-modules/deluge-client/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "deluge-client";
diff --git a/pkgs/development/python-modules/demjson/default.nix b/pkgs/development/python-modules/demjson/default.nix
index fc70562938e..25e2692af3b 100644
--- a/pkgs/development/python-modules/demjson/default.nix
+++ b/pkgs/development/python-modules/demjson/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python, buildPythonPackage, fetchPypi, isPy3k }:
+{ lib, python, buildPythonPackage, fetchPypi, isPy3k }:
 
 buildPythonPackage rec {
   pname = "demjson";
diff --git a/pkgs/development/python-modules/dependency-injector/default.nix b/pkgs/development/python-modules/dependency-injector/default.nix
index 0c2e2055ff9..979d2811fe6 100644
--- a/pkgs/development/python-modules/dependency-injector/default.nix
+++ b/pkgs/development/python-modules/dependency-injector/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, isPy3k, six, unittest2, pyyaml, flask }:
+{ lib, buildPythonPackage, fetchPypi, isPy3k, six, unittest2, pyyaml, flask }:
 
 let
   testPath =
diff --git a/pkgs/development/python-modules/deprecated/default.nix b/pkgs/development/python-modules/deprecated/default.nix
index a64ed0b9d99..589335f8258 100644
--- a/pkgs/development/python-modules/deprecated/default.nix
+++ b/pkgs/development/python-modules/deprecated/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage,
+{ lib, fetchPypi, buildPythonPackage,
   wrapt, pytest, tox }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/derpconf/default.nix b/pkgs/development/python-modules/derpconf/default.nix
index f9b8f5dec7c..cc7b6870ad8 100644
--- a/pkgs/development/python-modules/derpconf/default.nix
+++ b/pkgs/development/python-modules/derpconf/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, six }:
+{ lib, buildPythonPackage, fetchPypi, six }:
 
 buildPythonPackage rec {
   pname = "derpconf";
diff --git a/pkgs/development/python-modules/descartes/default.nix b/pkgs/development/python-modules/descartes/default.nix
index 5280ff2417a..b10526ff0fd 100644
--- a/pkgs/development/python-modules/descartes/default.nix
+++ b/pkgs/development/python-modules/descartes/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi,
+{ lib, buildPythonPackage, fetchPypi,
   matplotlib, shapely
 }:
 
diff --git a/pkgs/development/python-modules/deskcon/default.nix b/pkgs/development/python-modules/deskcon/default.nix
index 01918445b34..43d5a955027 100644
--- a/pkgs/development/python-modules/deskcon/default.nix
+++ b/pkgs/development/python-modules/deskcon/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , pyopenssl
 , pkgs
diff --git a/pkgs/development/python-modules/diff_cover/default.nix b/pkgs/development/python-modules/diff_cover/default.nix
index 9672cca46b0..03b1f4fa28e 100644
--- a/pkgs/development/python-modules/diff_cover/default.nix
+++ b/pkgs/development/python-modules/diff_cover/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , inflect
 , jinja2
 , jinja2_pluralize
diff --git a/pkgs/development/python-modules/digi-xbee/default.nix b/pkgs/development/python-modules/digi-xbee/default.nix
index ad653c6313c..d5f1445a677 100644
--- a/pkgs/development/python-modules/digi-xbee/default.nix
+++ b/pkgs/development/python-modules/digi-xbee/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, buildPythonPackage, fetchPypi, isPy27, pyserial, srp, lib }:
+{ buildPythonPackage, fetchPypi, isPy27, pyserial, srp, lib }:
 
 buildPythonPackage rec {
   pname = "digi-xbee";
diff --git a/pkgs/development/python-modules/discogs_client/default.nix b/pkgs/development/python-modules/discogs_client/default.nix
index 5e3ac1e1fcd..e522ac4b6c9 100644
--- a/pkgs/development/python-modules/discogs_client/default.nix
+++ b/pkgs/development/python-modules/discogs_client/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, requests, oauthlib }:
+{ lib, buildPythonPackage, fetchPypi, requests, oauthlib }:
 
 buildPythonPackage rec {
   pname = "discogs-client";
diff --git a/pkgs/development/python-modules/distlib/default.nix b/pkgs/development/python-modules/distlib/default.nix
index 403834a3731..12e05b58c4c 100644
--- a/pkgs/development/python-modules/distlib/default.nix
+++ b/pkgs/development/python-modules/distlib/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "distlib";
diff --git a/pkgs/development/python-modules/distorm3/default.nix b/pkgs/development/python-modules/distorm3/default.nix
index e9b8e66d4c9..d798414c197 100644
--- a/pkgs/development/python-modules/distorm3/default.nix
+++ b/pkgs/development/python-modules/distorm3/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "distorm3";
diff --git a/pkgs/development/python-modules/distro/default.nix b/pkgs/development/python-modules/distro/default.nix
index 81bcccd8bd6..16d26e741aa 100644
--- a/pkgs/development/python-modules/distro/default.nix
+++ b/pkgs/development/python-modules/distro/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage }:
+{ lib, fetchPypi, buildPythonPackage }:
 
 buildPythonPackage rec {
   pname = "distro";
diff --git a/pkgs/development/python-modules/distutils_extra/default.nix b/pkgs/development/python-modules/distutils_extra/default.nix
index 882a3995799..c2fbcdfe46c 100644
--- a/pkgs/development/python-modules/distutils_extra/default.nix
+++ b/pkgs/development/python-modules/distutils_extra/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchurl
 }:
diff --git a/pkgs/development/python-modules/dj-email-url/default.nix b/pkgs/development/python-modules/dj-email-url/default.nix
index f8dd9dca202..0cabbef1d15 100644
--- a/pkgs/development/python-modules/dj-email-url/default.nix
+++ b/pkgs/development/python-modules/dj-email-url/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , python
diff --git a/pkgs/development/python-modules/dj-search-url/default.nix b/pkgs/development/python-modules/dj-search-url/default.nix
index 321bec8149d..b216c8e62a1 100644
--- a/pkgs/development/python-modules/dj-search-url/default.nix
+++ b/pkgs/development/python-modules/dj-search-url/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/django-allauth/default.nix b/pkgs/development/python-modules/django-allauth/default.nix
index fafd7ab9a63..143e76cf0d8 100644
--- a/pkgs/development/python-modules/django-allauth/default.nix
+++ b/pkgs/development/python-modules/django-allauth/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub, requests, requests_oauthlib
+{ lib, buildPythonPackage, fetchFromGitHub, requests, requests_oauthlib
 , django, python3-openid, mock, coverage }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/django-anymail/default.nix b/pkgs/development/python-modules/django-anymail/default.nix
index 892cf179c37..96d5aa7fd9d 100644
--- a/pkgs/development/python-modules/django-anymail/default.nix
+++ b/pkgs/development/python-modules/django-anymail/default.nix
@@ -1,5 +1,5 @@
 {
-    lib, stdenv,
+    lib,
     buildPythonPackage,
     fetchFromGitHub,
     six,
diff --git a/pkgs/development/python-modules/django-auth-ldap/default.nix b/pkgs/development/python-modules/django-auth-ldap/default.nix
index d0dacd659a1..2271be1d16f 100644
--- a/pkgs/development/python-modules/django-auth-ldap/default.nix
+++ b/pkgs/development/python-modules/django-auth-ldap/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi, isPy27
 , ldap , django
diff --git a/pkgs/development/python-modules/django-cache-url/default.nix b/pkgs/development/python-modules/django-cache-url/default.nix
index 103bfb29578..6487e276232 100644
--- a/pkgs/development/python-modules/django-cache-url/default.nix
+++ b/pkgs/development/python-modules/django-cache-url/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pytest
diff --git a/pkgs/development/python-modules/django-cleanup/default.nix b/pkgs/development/python-modules/django-cleanup/default.nix
index 39f65275fee..83dbbc5d197 100644
--- a/pkgs/development/python-modules/django-cleanup/default.nix
+++ b/pkgs/development/python-modules/django-cleanup/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, django
+{ lib, buildPythonPackage, fetchPypi, django
 , redis, async-timeout, hiredis
 }:
 
diff --git a/pkgs/development/python-modules/django-compat/default.nix b/pkgs/development/python-modules/django-compat/default.nix
index ef18bfe77ec..d33a4be2817 100644
--- a/pkgs/development/python-modules/django-compat/default.nix
+++ b/pkgs/development/python-modules/django-compat/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub, python,
+{ lib, buildPythonPackage, fetchFromGitHub, python,
   django, six
 }:
 
diff --git a/pkgs/development/python-modules/django-configurations/default.nix b/pkgs/development/python-modules/django-configurations/default.nix
index bf1835071f8..b6b736e9238 100644
--- a/pkgs/development/python-modules/django-configurations/default.nix
+++ b/pkgs/development/python-modules/django-configurations/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , django-discover-runner
diff --git a/pkgs/development/python-modules/django-csp/default.nix b/pkgs/development/python-modules/django-csp/default.nix
index d87e39b8e3f..1f7b2811405 100644
--- a/pkgs/development/python-modules/django-csp/default.nix
+++ b/pkgs/development/python-modules/django-csp/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage, django }:
+{ lib, fetchPypi, buildPythonPackage, django }:
 
 buildPythonPackage rec {
   pname = "django-csp";
diff --git a/pkgs/development/python-modules/django-discover-runner/default.nix b/pkgs/development/python-modules/django-discover-runner/default.nix
index 63d51d41fc9..8d07148ce18 100644
--- a/pkgs/development/python-modules/django-discover-runner/default.nix
+++ b/pkgs/development/python-modules/django-discover-runner/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , django
diff --git a/pkgs/development/python-modules/django-dynamic-preferences/default.nix b/pkgs/development/python-modules/django-dynamic-preferences/default.nix
index 7288896c4fe..7e5105807cf 100644
--- a/pkgs/development/python-modules/django-dynamic-preferences/default.nix
+++ b/pkgs/development/python-modules/django-dynamic-preferences/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , django, persisting-theory, six
 }:
 
diff --git a/pkgs/development/python-modules/django-filter/default.nix b/pkgs/development/python-modules/django-filter/default.nix
index e4ca546bbc2..00c260946cc 100644
--- a/pkgs/development/python-modules/django-filter/default.nix
+++ b/pkgs/development/python-modules/django-filter/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , django
diff --git a/pkgs/development/python-modules/django-gravatar2/default.nix b/pkgs/development/python-modules/django-gravatar2/default.nix
index 08312606603..458723601dd 100644
--- a/pkgs/development/python-modules/django-gravatar2/default.nix
+++ b/pkgs/development/python-modules/django-gravatar2/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "django-gravatar2";
diff --git a/pkgs/development/python-modules/django-hijack-admin/default.nix b/pkgs/development/python-modules/django-hijack-admin/default.nix
index 54056547f48..ee5a47d3787 100644
--- a/pkgs/development/python-modules/django-hijack-admin/default.nix
+++ b/pkgs/development/python-modules/django-hijack-admin/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub, python,
+{ lib, buildPythonPackage, fetchFromGitHub, python,
   django_hijack, django_nose }:
 buildPythonPackage rec {
   pname = "django-hijack-admin";
diff --git a/pkgs/development/python-modules/django-hijack/default.nix b/pkgs/development/python-modules/django-hijack/default.nix
index bd6f870de66..fd9c30a4bc7 100644
--- a/pkgs/development/python-modules/django-hijack/default.nix
+++ b/pkgs/development/python-modules/django-hijack/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub, python,
+{ lib, buildPythonPackage, fetchFromGitHub, python,
   django, django_compat, django_nose
 }:
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/django-logentry-admin/default.nix b/pkgs/development/python-modules/django-logentry-admin/default.nix
index 59e9782f050..7bba272c155 100644
--- a/pkgs/development/python-modules/django-logentry-admin/default.nix
+++ b/pkgs/development/python-modules/django-logentry-admin/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, buildPythonPackage, django, pytest, pytest-django }:
+{ lib, fetchFromGitHub, buildPythonPackage, django, pytest, pytest-django }:
 
 buildPythonPackage rec {
   pname = "django-logentry-admin";
diff --git a/pkgs/development/python-modules/django-mailman3/default.nix b/pkgs/development/python-modules/django-mailman3/default.nix
index 40063c89e43..11939b9b773 100644
--- a/pkgs/development/python-modules/django-mailman3/default.nix
+++ b/pkgs/development/python-modules/django-mailman3/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, django-gravatar2, django_compressor
+{ lib, buildPythonPackage, fetchPypi, django-gravatar2, django_compressor
 , django-allauth, mailmanclient, django, mock
 }:
 
diff --git a/pkgs/development/python-modules/django-maintenance-mode/default.nix b/pkgs/development/python-modules/django-maintenance-mode/default.nix
index c599e28d206..b4d90da0880 100644
--- a/pkgs/development/python-modules/django-maintenance-mode/default.nix
+++ b/pkgs/development/python-modules/django-maintenance-mode/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, buildPythonPackage, pytest, django }:
+{ lib, fetchFromGitHub, buildPythonPackage, pytest, django }:
 
 buildPythonPackage rec {
   pname = "django-maintenance-mode";
diff --git a/pkgs/development/python-modules/django-oauth-toolkit/default.nix b/pkgs/development/python-modules/django-oauth-toolkit/default.nix
index 6e16af5bc8f..e7cb4814cb4 100644
--- a/pkgs/development/python-modules/django-oauth-toolkit/default.nix
+++ b/pkgs/development/python-modules/django-oauth-toolkit/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub
+{ lib, buildPythonPackage, fetchFromGitHub
 , django, requests, oauthlib
 }:
 
diff --git a/pkgs/development/python-modules/django-paintstore/default.nix b/pkgs/development/python-modules/django-paintstore/default.nix
index 4fed9bf470b..8790067e4af 100644
--- a/pkgs/development/python-modules/django-paintstore/default.nix
+++ b/pkgs/development/python-modules/django-paintstore/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, requests, requests_oauthlib
+{ lib, buildPythonPackage, fetchPypi, requests, requests_oauthlib
 , django, python3-openid }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/django-polymorphic/default.nix b/pkgs/development/python-modules/django-polymorphic/default.nix
index b3b71231b75..4b8d79a2917 100644
--- a/pkgs/development/python-modules/django-polymorphic/default.nix
+++ b/pkgs/development/python-modules/django-polymorphic/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub, python, django, dj-database-url }:
+{ lib, buildPythonPackage, fetchFromGitHub, python, django, dj-database-url }:
 
 buildPythonPackage rec {
   pname = "django-polymorphic";
diff --git a/pkgs/development/python-modules/django-postgresql-netfields/default.nix b/pkgs/development/python-modules/django-postgresql-netfields/default.nix
index f2bd574919a..141a46f5315 100644
--- a/pkgs/development/python-modules/django-postgresql-netfields/default.nix
+++ b/pkgs/development/python-modules/django-postgresql-netfields/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , django
 , netaddr
diff --git a/pkgs/development/python-modules/django-q/default.nix b/pkgs/development/python-modules/django-q/default.nix
index 2eb3b19f554..16b1e0bcc59 100644
--- a/pkgs/development/python-modules/django-q/default.nix
+++ b/pkgs/development/python-modules/django-q/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, django-picklefield, arrow
+{ lib, buildPythonPackage, fetchPypi, django-picklefield, arrow
 , blessed, django, future }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/django-ranged-response/default.nix b/pkgs/development/python-modules/django-ranged-response/default.nix
index d517563590f..df5fc4b205b 100644
--- a/pkgs/development/python-modules/django-ranged-response/default.nix
+++ b/pkgs/development/python-modules/django-ranged-response/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, fetchPypi, buildPythonPackage, django }:
+{ lib, fetchurl, fetchPypi, buildPythonPackage, django }:
 
 buildPythonPackage rec {
   pname = "django-ranged-response";
diff --git a/pkgs/development/python-modules/django-raster/default.nix b/pkgs/development/python-modules/django-raster/default.nix
index 173452ebe48..609388a311c 100644
--- a/pkgs/development/python-modules/django-raster/default.nix
+++ b/pkgs/development/python-modules/django-raster/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, isPy3k,
+{ lib, buildPythonPackage, fetchPypi, isPy3k,
   numpy, django_colorful, pillow, psycopg2,
   pyparsing, django, celery, boto3, importlib-metadata
 }:
diff --git a/pkgs/development/python-modules/django-storages/default.nix b/pkgs/development/python-modules/django-storages/default.nix
index 869c3bf74ee..6efba78d4ca 100644
--- a/pkgs/development/python-modules/django-storages/default.nix
+++ b/pkgs/development/python-modules/django-storages/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , django
 }:
 
diff --git a/pkgs/development/python-modules/django-versatileimagefield/default.nix b/pkgs/development/python-modules/django-versatileimagefield/default.nix
index 39912f47420..4307fc69d45 100644
--- a/pkgs/development/python-modules/django-versatileimagefield/default.nix
+++ b/pkgs/development/python-modules/django-versatileimagefield/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , django
diff --git a/pkgs/development/python-modules/django-webpack-loader/default.nix b/pkgs/development/python-modules/django-webpack-loader/default.nix
index e3e094ab706..3e849b48773 100644
--- a/pkgs/development/python-modules/django-webpack-loader/default.nix
+++ b/pkgs/development/python-modules/django-webpack-loader/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "django-webpack-loader";
diff --git a/pkgs/development/python-modules/django-widget-tweaks/default.nix b/pkgs/development/python-modules/django-widget-tweaks/default.nix
index 8529df09bb7..853e12327d3 100644
--- a/pkgs/development/python-modules/django-widget-tweaks/default.nix
+++ b/pkgs/development/python-modules/django-widget-tweaks/default.nix
@@ -1,4 +1,4 @@
-{ buildPythonPackage, fetchFromGitHub, python, lib, stdenv, django }:
+{ buildPythonPackage, fetchFromGitHub, python, lib, django }:
 
 buildPythonPackage rec {
   pname = "django-widget-tweaks";
diff --git a/pkgs/development/python-modules/django_appconf/default.nix b/pkgs/development/python-modules/django_appconf/default.nix
index c9c9913d764..5da9ed0ca26 100644
--- a/pkgs/development/python-modules/django_appconf/default.nix
+++ b/pkgs/development/python-modules/django_appconf/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub, six, django, fetchpatch }:
+{ lib, buildPythonPackage, fetchFromGitHub, six, django, fetchpatch }:
 buildPythonPackage rec {
   pname = "django-appconf";
   version = "1.0.3";
diff --git a/pkgs/development/python-modules/django_classytags/default.nix b/pkgs/development/python-modules/django_classytags/default.nix
index e0a297e53c0..2ef8639c17e 100644
--- a/pkgs/development/python-modules/django_classytags/default.nix
+++ b/pkgs/development/python-modules/django_classytags/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , django
diff --git a/pkgs/development/python-modules/django_colorful/default.nix b/pkgs/development/python-modules/django_colorful/default.nix
index 468327139e6..5de127a9722 100644
--- a/pkgs/development/python-modules/django_colorful/default.nix
+++ b/pkgs/development/python-modules/django_colorful/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , django
diff --git a/pkgs/development/python-modules/django_compressor/default.nix b/pkgs/development/python-modules/django_compressor/default.nix
index f0080436489..edf5faa5af4 100644
--- a/pkgs/development/python-modules/django_compressor/default.nix
+++ b/pkgs/development/python-modules/django_compressor/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi,
+{ lib, buildPythonPackage, fetchPypi,
   rcssmin, rjsmin, django_appconf }:
 buildPythonPackage rec {
     pname = "django_compressor";
diff --git a/pkgs/development/python-modules/django_contrib_comments/default.nix b/pkgs/development/python-modules/django_contrib_comments/default.nix
index a8872967df4..a452db3cf28 100644
--- a/pkgs/development/python-modules/django_contrib_comments/default.nix
+++ b/pkgs/development/python-modules/django_contrib_comments/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , django
diff --git a/pkgs/development/python-modules/django_environ/default.nix b/pkgs/development/python-modules/django_environ/default.nix
index fa2618fa1a7..3f01a2b294a 100644
--- a/pkgs/development/python-modules/django_environ/default.nix
+++ b/pkgs/development/python-modules/django_environ/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , django
diff --git a/pkgs/development/python-modules/django_evolution/default.nix b/pkgs/development/python-modules/django_evolution/default.nix
index dba92efb2d9..816442d6e2a 100644
--- a/pkgs/development/python-modules/django_evolution/default.nix
+++ b/pkgs/development/python-modules/django_evolution/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy3k
diff --git a/pkgs/development/python-modules/django_guardian/default.nix b/pkgs/development/python-modules/django_guardian/default.nix
index 60023660ea5..957944f01d3 100644
--- a/pkgs/development/python-modules/django_guardian/default.nix
+++ b/pkgs/development/python-modules/django_guardian/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , django_environ, mock, django
 , pytest, pytestrunner, pytest-django
 }:
diff --git a/pkgs/development/python-modules/django_modelcluster/default.nix b/pkgs/development/python-modules/django_modelcluster/default.nix
index 500fe2e2fbc..fdd4bd03b70 100644
--- a/pkgs/development/python-modules/django_modelcluster/default.nix
+++ b/pkgs/development/python-modules/django_modelcluster/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pytz
diff --git a/pkgs/development/python-modules/django_nose/default.nix b/pkgs/development/python-modules/django_nose/default.nix
index 7f2f9efcfc5..2506f6aba44 100644
--- a/pkgs/development/python-modules/django_nose/default.nix
+++ b/pkgs/development/python-modules/django_nose/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , nose
diff --git a/pkgs/development/python-modules/django_redis/default.nix b/pkgs/development/python-modules/django_redis/default.nix
index 434dea7f0f2..56e4e845f08 100644
--- a/pkgs/development/python-modules/django_redis/default.nix
+++ b/pkgs/development/python-modules/django_redis/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage,
+{ lib, fetchPypi, buildPythonPackage,
   mock, django, redis, msgpack }:
 buildPythonPackage rec {
   pname = "django-redis";
diff --git a/pkgs/development/python-modules/django_reversion/default.nix b/pkgs/development/python-modules/django_reversion/default.nix
index 16574770ff9..3f038b4fd06 100644
--- a/pkgs/development/python-modules/django_reversion/default.nix
+++ b/pkgs/development/python-modules/django_reversion/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , django
diff --git a/pkgs/development/python-modules/django_silk/default.nix b/pkgs/development/python-modules/django_silk/default.nix
index 66475b35d2a..90ba6cf2924 100644
--- a/pkgs/development/python-modules/django_silk/default.nix
+++ b/pkgs/development/python-modules/django_silk/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , python
 , fetchFromGitHub
diff --git a/pkgs/development/python-modules/django_taggit/default.nix b/pkgs/development/python-modules/django_taggit/default.nix
index e715dde7c41..b51f0421fd9 100644
--- a/pkgs/development/python-modules/django_taggit/default.nix
+++ b/pkgs/development/python-modules/django_taggit/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , python
 , fetchPypi
diff --git a/pkgs/development/python-modules/django_treebeard/default.nix b/pkgs/development/python-modules/django_treebeard/default.nix
index e734a5f7ae8..88536b210d2 100644
--- a/pkgs/development/python-modules/django_treebeard/default.nix
+++ b/pkgs/development/python-modules/django_treebeard/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pytest
diff --git a/pkgs/development/python-modules/djangorestframework/default.nix b/pkgs/development/python-modules/djangorestframework/default.nix
index ce92fab3e96..66a57625b4a 100644
--- a/pkgs/development/python-modules/djangorestframework/default.nix
+++ b/pkgs/development/python-modules/djangorestframework/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub, django, isPy27 }:
+{ lib, buildPythonPackage, fetchFromGitHub, django, isPy27 }:
 
 buildPythonPackage rec {
   version = "3.12.2";
diff --git a/pkgs/development/python-modules/dkimpy/default.nix b/pkgs/development/python-modules/dkimpy/default.nix
index e7a80d91d24..aaaf5708a59 100644
--- a/pkgs/development/python-modules/dkimpy/default.nix
+++ b/pkgs/development/python-modules/dkimpy/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, openssl, buildPythonPackage
+{ lib, fetchPypi, openssl, buildPythonPackage
 , pytest, dnspython, pynacl, authres, python }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/docker-pycreds/default.nix b/pkgs/development/python-modules/docker-pycreds/default.nix
index 543f4994020..c022d62bfa8 100644
--- a/pkgs/development/python-modules/docker-pycreds/default.nix
+++ b/pkgs/development/python-modules/docker-pycreds/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, six }:
+{ lib, buildPythonPackage, fetchPypi, six }:
 
 buildPythonPackage rec {
   pname = "docker-pycreds";
diff --git a/pkgs/development/python-modules/dockerfile-parse/default.nix b/pkgs/development/python-modules/dockerfile-parse/default.nix
index 74e363d18b9..45fe856f6f0 100644
--- a/pkgs/development/python-modules/dockerfile-parse/default.nix
+++ b/pkgs/development/python-modules/dockerfile-parse/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, six, pytestcov, pytest }:
+{ lib, buildPythonPackage, fetchPypi, six, pytestcov, pytest }:
 
 buildPythonPackage rec {
   version = "1.1.0";
diff --git a/pkgs/development/python-modules/dockerpty/default.nix b/pkgs/development/python-modules/dockerpty/default.nix
index b6267b87c1b..775767e6fec 100644
--- a/pkgs/development/python-modules/dockerpty/default.nix
+++ b/pkgs/development/python-modules/dockerpty/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, six }:
+{ lib, buildPythonPackage, fetchPypi, six }:
 
 buildPythonPackage rec {
   pname = "dockerpty";
diff --git a/pkgs/development/python-modules/docopt/default.nix b/pkgs/development/python-modules/docopt/default.nix
index 2dc4bb38cf1..68df40a3cbf 100644
--- a/pkgs/development/python-modules/docopt/default.nix
+++ b/pkgs/development/python-modules/docopt/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "docopt";
diff --git a/pkgs/development/python-modules/doctest-ignore-unicode/default.nix b/pkgs/development/python-modules/doctest-ignore-unicode/default.nix
index 12d15799ecc..533dbed29b3 100644
--- a/pkgs/development/python-modules/doctest-ignore-unicode/default.nix
+++ b/pkgs/development/python-modules/doctest-ignore-unicode/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, nose }:
+{ lib, buildPythonPackage, fetchPypi, nose }:
 
 buildPythonPackage rec {
   pname = "doctest-ignore-unicode";
diff --git a/pkgs/development/python-modules/dogpile.cache/default.nix b/pkgs/development/python-modules/dogpile.cache/default.nix
index 5dba1b91bc1..92fae14f4ea 100644
--- a/pkgs/development/python-modules/dogpile.cache/default.nix
+++ b/pkgs/development/python-modules/dogpile.cache/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pythonOlder
diff --git a/pkgs/development/python-modules/dogpile.core/default.nix b/pkgs/development/python-modules/dogpile.core/default.nix
index f6eabc378b3..8ef37282250 100644
--- a/pkgs/development/python-modules/dogpile.core/default.nix
+++ b/pkgs/development/python-modules/dogpile.core/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "dogpile.core";
diff --git a/pkgs/development/python-modules/dot2tex/default.nix b/pkgs/development/python-modules/dot2tex/default.nix
index 2626f420676..2154f33bb8b 100644
--- a/pkgs/development/python-modules/dot2tex/default.nix
+++ b/pkgs/development/python-modules/dot2tex/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , python
 , buildPythonPackage
 , fetchPypi
diff --git a/pkgs/development/python-modules/dpath/default.nix b/pkgs/development/python-modules/dpath/default.nix
index 505bd7bb456..9db726a12a1 100644
--- a/pkgs/development/python-modules/dpath/default.nix
+++ b/pkgs/development/python-modules/dpath/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage, isPy27
+{ lib, fetchPypi, buildPythonPackage, isPy27
 , mock, pytestCheckHook, nose, hypothesis
 }:
 
diff --git a/pkgs/development/python-modules/dpkt/default.nix b/pkgs/development/python-modules/dpkt/default.nix
index 177b260e804..52f4f42661d 100644
--- a/pkgs/development/python-modules/dpkt/default.nix
+++ b/pkgs/development/python-modules/dpkt/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage }:
+{ lib, fetchPypi, buildPythonPackage }:
 
 buildPythonPackage rec {
   pname = "dpkt";
diff --git a/pkgs/development/python-modules/drf-yasg/default.nix b/pkgs/development/python-modules/drf-yasg/default.nix
index dd92d51d6c6..d69ece809bb 100644
--- a/pkgs/development/python-modules/drf-yasg/default.nix
+++ b/pkgs/development/python-modules/drf-yasg/default.nix
@@ -1,5 +1,5 @@
 {
-  lib, stdenv,
+  lib,
   buildPythonPackage,
   fetchPypi,
   inflection,
diff --git a/pkgs/development/python-modules/dropbox/default.nix b/pkgs/development/python-modules/dropbox/default.nix
index 22e66d0a4a4..ca0283b2cbd 100644
--- a/pkgs/development/python-modules/dropbox/default.nix
+++ b/pkgs/development/python-modules/dropbox/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , pytestrunner, requests, urllib3, mock, setuptools }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/dtopt/default.nix b/pkgs/development/python-modules/dtopt/default.nix
index 84631c21708..a5d4675f993 100644
--- a/pkgs/development/python-modules/dtopt/default.nix
+++ b/pkgs/development/python-modules/dtopt/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy3k
diff --git a/pkgs/development/python-modules/dufte/default.nix b/pkgs/development/python-modules/dufte/default.nix
index d8435afa3f9..f5e9fa6195a 100644
--- a/pkgs/development/python-modules/dufte/default.nix
+++ b/pkgs/development/python-modules/dufte/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy3k
diff --git a/pkgs/development/python-modules/dyn/default.nix b/pkgs/development/python-modules/dyn/default.nix
index b5fa28f2de6..7cddb324f3a 100644
--- a/pkgs/development/python-modules/dyn/default.nix
+++ b/pkgs/development/python-modules/dyn/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, pytest, pytestcov, mock
+{ lib, buildPythonPackage, fetchPypi, pytest, pytestcov, mock
 , pytest_xdist, covCore, glibcLocales }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/dynd/default.nix b/pkgs/development/python-modules/dynd/default.nix
index f23d19510ee..9323255cc27 100644
--- a/pkgs/development/python-modules/dynd/default.nix
+++ b/pkgs/development/python-modules/dynd/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , isPyPy
 , isPy3k
diff --git a/pkgs/development/python-modules/easygui/default.nix b/pkgs/development/python-modules/easygui/default.nix
index 441d839d36f..322e6461e5d 100644
--- a/pkgs/development/python-modules/easygui/default.nix
+++ b/pkgs/development/python-modules/easygui/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage }:
+{ lib, fetchPypi, buildPythonPackage }:
 
 buildPythonPackage rec {
   pname = "easygui";
diff --git a/pkgs/development/python-modules/easyprocess/default.nix b/pkgs/development/python-modules/easyprocess/default.nix
index fc86edf5d4d..c98a8b572d4 100644
--- a/pkgs/development/python-modules/easyprocess/default.nix
+++ b/pkgs/development/python-modules/easyprocess/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "EasyProcess";
diff --git a/pkgs/development/python-modules/easysnmp/default.nix b/pkgs/development/python-modules/easysnmp/default.nix
index d5c69d4c7e9..11b13d8325a 100644
--- a/pkgs/development/python-modules/easysnmp/default.nix
+++ b/pkgs/development/python-modules/easysnmp/default.nix
@@ -1,5 +1,4 @@
-{ stdenv
-, lib
+{ lib
 , buildPythonPackage
 , pythonAtLeast
 , fetchFromGitHub
diff --git a/pkgs/development/python-modules/ecdsa/default.nix b/pkgs/development/python-modules/ecdsa/default.nix
index 2a17f84bb3b..3c892185687 100644
--- a/pkgs/development/python-modules/ecdsa/default.nix
+++ b/pkgs/development/python-modules/ecdsa/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pkgs
diff --git a/pkgs/development/python-modules/ed25519/default.nix b/pkgs/development/python-modules/ed25519/default.nix
index 183d7cc3ca5..47692075d3b 100644
--- a/pkgs/development/python-modules/ed25519/default.nix
+++ b/pkgs/development/python-modules/ed25519/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage }:
+{ lib, fetchPypi, buildPythonPackage }:
 
 buildPythonPackage rec {
   pname = "ed25519";
diff --git a/pkgs/development/python-modules/editorconfig/default.nix b/pkgs/development/python-modules/editorconfig/default.nix
index 727c3003db5..4329db98c2b 100644
--- a/pkgs/development/python-modules/editorconfig/default.nix
+++ b/pkgs/development/python-modules/editorconfig/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchgit
 , cmake
diff --git a/pkgs/development/python-modules/edward/default.nix b/pkgs/development/python-modules/edward/default.nix
index c1171043356..ac2d5023cc9 100644
--- a/pkgs/development/python-modules/edward/default.nix
+++ b/pkgs/development/python-modules/edward/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, isPy27, pythonAtLeast
+{ lib, buildPythonPackage, fetchPypi, isPy27, pythonAtLeast
 , Keras, numpy, scipy, six, tensorflow }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/eggdeps/default.nix b/pkgs/development/python-modules/eggdeps/default.nix
index ae339368ff5..02c2c644449 100644
--- a/pkgs/development/python-modules/eggdeps/default.nix
+++ b/pkgs/development/python-modules/eggdeps/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , zope_interface
diff --git a/pkgs/development/python-modules/elasticsearch-dsl/default.nix b/pkgs/development/python-modules/elasticsearch-dsl/default.nix
index 67e277b57ac..a2f2ff038db 100644
--- a/pkgs/development/python-modules/elasticsearch-dsl/default.nix
+++ b/pkgs/development/python-modules/elasticsearch-dsl/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy3k
diff --git a/pkgs/development/python-modules/elasticsearch/default.nix b/pkgs/development/python-modules/elasticsearch/default.nix
index 4929d1f51a4..9161525c2bc 100644
--- a/pkgs/development/python-modules/elasticsearch/default.nix
+++ b/pkgs/development/python-modules/elasticsearch/default.nix
@@ -2,7 +2,7 @@
 , fetchPypi
 , urllib3, requests
 , nosexcover, mock
-, lib, stdenv
+, lib
 }:
 
 buildPythonPackage (rec {
diff --git a/pkgs/development/python-modules/eliot/default.nix b/pkgs/development/python-modules/eliot/default.nix
index 472834c5c72..152561b69ce 100644
--- a/pkgs/development/python-modules/eliot/default.nix
+++ b/pkgs/development/python-modules/eliot/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pythonOlder
diff --git a/pkgs/development/python-modules/emcee/default.nix b/pkgs/development/python-modules/emcee/default.nix
index 12974a9422d..a4f2bece349 100644
--- a/pkgs/development/python-modules/emcee/default.nix
+++ b/pkgs/development/python-modules/emcee/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , numpy }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/emv/default.nix b/pkgs/development/python-modules/emv/default.nix
index 26d40d8d205..f68729a42b6 100644
--- a/pkgs/development/python-modules/emv/default.nix
+++ b/pkgs/development/python-modules/emv/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub
+{ lib, buildPythonPackage, fetchFromGitHub
 , click, enum-compat, pyscard, pycountry, terminaltables
 , pytestCheckHook, pythonOlder
 }:
diff --git a/pkgs/development/python-modules/enum/default.nix b/pkgs/development/python-modules/enum/default.nix
index ad266623c78..db827601d5d 100644
--- a/pkgs/development/python-modules/enum/default.nix
+++ b/pkgs/development/python-modules/enum/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy3k
diff --git a/pkgs/development/python-modules/enum34/default.nix b/pkgs/development/python-modules/enum34/default.nix
index 5e26853098f..91f54dc99cb 100644
--- a/pkgs/development/python-modules/enum34/default.nix
+++ b/pkgs/development/python-modules/enum34/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pythonAtLeast
diff --git a/pkgs/development/python-modules/epc/default.nix b/pkgs/development/python-modules/epc/default.nix
index d7459543163..3950afa578e 100644
--- a/pkgs/development/python-modules/epc/default.nix
+++ b/pkgs/development/python-modules/epc/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , sexpdata
diff --git a/pkgs/development/python-modules/ephem/default.nix b/pkgs/development/python-modules/ephem/default.nix
index 4d6e5940926..c0d77c29748 100644
--- a/pkgs/development/python-modules/ephem/default.nix
+++ b/pkgs/development/python-modules/ephem/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, isPy3k
+{ lib, buildPythonPackage, fetchPypi, isPy3k
 , glibcLocales, pytest }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/et_xmlfile/default.nix b/pkgs/development/python-modules/et_xmlfile/default.nix
index 5ba9490d945..e407ca35e89 100644
--- a/pkgs/development/python-modules/et_xmlfile/default.nix
+++ b/pkgs/development/python-modules/et_xmlfile/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , lxml
diff --git a/pkgs/development/python-modules/etcd/default.nix b/pkgs/development/python-modules/etcd/default.nix
index 338992259a1..0c2fd0c2952 100644
--- a/pkgs/development/python-modules/etcd/default.nix
+++ b/pkgs/development/python-modules/etcd/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchurl
 , simplejson
diff --git a/pkgs/development/python-modules/eve/default.nix b/pkgs/development/python-modules/eve/default.nix
index b931db188e3..4d5c6173cd7 100644
--- a/pkgs/development/python-modules/eve/default.nix
+++ b/pkgs/development/python-modules/eve/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , flask
diff --git a/pkgs/development/python-modules/eventlib/default.nix b/pkgs/development/python-modules/eventlib/default.nix
index 1b2b44d65f7..4d4bff85842 100644
--- a/pkgs/development/python-modules/eventlib/default.nix
+++ b/pkgs/development/python-modules/eventlib/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , isPy3k
 , fetchdarcs
diff --git a/pkgs/development/python-modules/evernote/default.nix b/pkgs/development/python-modules/evernote/default.nix
index 70c7fad963a..8c6e4b6c7c2 100644
--- a/pkgs/development/python-modules/evernote/default.nix
+++ b/pkgs/development/python-modules/evernote/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy27
diff --git a/pkgs/development/python-modules/exchangelib/default.nix b/pkgs/development/python-modules/exchangelib/default.nix
index e380ca613cf..706e4d8137f 100644
--- a/pkgs/development/python-modules/exchangelib/default.nix
+++ b/pkgs/development/python-modules/exchangelib/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, buildPythonPackage,
+{ lib, fetchFromGitHub, buildPythonPackage,
   pythonOlder,
   lxml, tzlocal, python-dateutil, pygments, requests-kerberos,
   defusedxml, cached-property, isodate, requests_ntlm, dnspython,
diff --git a/pkgs/development/python-modules/execnet/default.nix b/pkgs/development/python-modules/execnet/default.nix
index 0a22ab4b051..ec4bcca9f86 100644
--- a/pkgs/development/python-modules/execnet/default.nix
+++ b/pkgs/development/python-modules/execnet/default.nix
@@ -1,5 +1,4 @@
-{ stdenv
-, lib
+{ lib
 , buildPythonPackage
 , isPyPy
 , fetchPypi
diff --git a/pkgs/development/python-modules/exifread/default.nix b/pkgs/development/python-modules/exifread/default.nix
index e86a681a8e3..e26f616f8db 100644
--- a/pkgs/development/python-modules/exifread/default.nix
+++ b/pkgs/development/python-modules/exifread/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/eyed3/default.nix b/pkgs/development/python-modules/eyed3/default.nix
index 08faf5c2ba8..3dfd810f99c 100644
--- a/pkgs/development/python-modules/eyed3/default.nix
+++ b/pkgs/development/python-modules/eyed3/default.nix
@@ -1,11 +1,10 @@
-{ stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pythonOlder
 , python
 , isPyPy
 , six
-, lib
 , filetype
 , deprecation
 , dataclasses
diff --git a/pkgs/development/python-modules/ezdxf/default.nix b/pkgs/development/python-modules/ezdxf/default.nix
index 6dfefe09204..3fd30062b0d 100644
--- a/pkgs/development/python-modules/ezdxf/default.nix
+++ b/pkgs/development/python-modules/ezdxf/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, pythonOlder, fetchFromGitHub, pyparsing, pytest }:
+{ lib, buildPythonPackage, pythonOlder, fetchFromGitHub, pyparsing, pytest }:
 
 buildPythonPackage rec {
   version = "0.12";
diff --git a/pkgs/development/python-modules/face/default.nix b/pkgs/development/python-modules/face/default.nix
index 89e7156fa52..db1810ca056 100644
--- a/pkgs/development/python-modules/face/default.nix
+++ b/pkgs/development/python-modules/face/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, boltons, pytest }:
+{ lib, buildPythonPackage, fetchPypi, boltons, pytest }:
 
 buildPythonPackage rec {
   pname = "face";
diff --git a/pkgs/development/python-modules/face_recognition/default.nix b/pkgs/development/python-modules/face_recognition/default.nix
index 1896bdfac59..6b2c6411aa1 100644
--- a/pkgs/development/python-modules/face_recognition/default.nix
+++ b/pkgs/development/python-modules/face_recognition/default.nix
@@ -1,5 +1,5 @@
 { buildPythonPackage, fetchFromGitHub, pillow, click, dlib, numpy
-, face_recognition_models, lib, stdenv, flake8, pytest, glibcLocales
+, face_recognition_models, lib, flake8, pytest, glibcLocales
 }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/face_recognition_models/default.nix b/pkgs/development/python-modules/face_recognition_models/default.nix
index d5838438b7d..6ec2634029b 100644
--- a/pkgs/development/python-modules/face_recognition_models/default.nix
+++ b/pkgs/development/python-modules/face_recognition_models/default.nix
@@ -1,4 +1,4 @@
-{ buildPythonPackage, lib, stdenv, fetchPypi, setuptools }:
+{ buildPythonPackage, lib, fetchPypi, setuptools }:
 
 buildPythonPackage rec {
   pname = "face_recognition_models";
diff --git a/pkgs/development/python-modules/fake-useragent/default.nix b/pkgs/development/python-modules/fake-useragent/default.nix
index be26ab98af6..9b207a81c3c 100644
--- a/pkgs/development/python-modules/fake-useragent/default.nix
+++ b/pkgs/development/python-modules/fake-useragent/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage, six, pytest }:
+{ lib, fetchPypi, buildPythonPackage, six, pytest }:
 
 buildPythonPackage rec {
   pname = "fake-useragent";
diff --git a/pkgs/development/python-modules/fake_factory/default.nix b/pkgs/development/python-modules/fake_factory/default.nix
index 82af8d04e07..2e561a163ab 100644
--- a/pkgs/development/python-modules/fake_factory/default.nix
+++ b/pkgs/development/python-modules/fake_factory/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , python
diff --git a/pkgs/development/python-modules/falcon/default.nix b/pkgs/development/python-modules/falcon/default.nix
index 8d1aa02026c..eb6cbfa242e 100644
--- a/pkgs/development/python-modules/falcon/default.nix
+++ b/pkgs/development/python-modules/falcon/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , coverage
diff --git a/pkgs/development/python-modules/fasteners/default.nix b/pkgs/development/python-modules/fasteners/default.nix
index 57ad69c0be4..55b9d3b3023 100644
--- a/pkgs/development/python-modules/fasteners/default.nix
+++ b/pkgs/development/python-modules/fasteners/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , six
diff --git a/pkgs/development/python-modules/fastentrypoints/default.nix b/pkgs/development/python-modules/fastentrypoints/default.nix
index eb86784ddc7..7671feb359f 100644
--- a/pkgs/development/python-modules/fastentrypoints/default.nix
+++ b/pkgs/development/python-modules/fastentrypoints/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "fastentrypoints";
diff --git a/pkgs/development/python-modules/fastimport/default.nix b/pkgs/development/python-modules/fastimport/default.nix
index 55aad9d71ea..383a0e4fbd5 100644
--- a/pkgs/development/python-modules/fastimport/default.nix
+++ b/pkgs/development/python-modules/fastimport/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, python, fetchPypi}:
+{ lib, buildPythonPackage, python, fetchPypi}:
 
 buildPythonPackage rec {
   pname = "fastimport";
diff --git a/pkgs/development/python-modules/fastpair/default.nix b/pkgs/development/python-modules/fastpair/default.nix
index 82964070d03..9a3f8c53b1d 100644
--- a/pkgs/development/python-modules/fastpair/default.nix
+++ b/pkgs/development/python-modules/fastpair/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub, pytestrunner, pytest, scipy }:
+{ lib, buildPythonPackage, fetchFromGitHub, pytestrunner, pytest, scipy }:
 
 buildPythonPackage {
   pname = "fastpair";
diff --git a/pkgs/development/python-modules/fastpbkdf2/default.nix b/pkgs/development/python-modules/fastpbkdf2/default.nix
index e033dc42d45..e154471d7a8 100644
--- a/pkgs/development/python-modules/fastpbkdf2/default.nix
+++ b/pkgs/development/python-modules/fastpbkdf2/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, buildPythonPackage
+{ lib, fetchFromGitHub, buildPythonPackage
 , openssl, pytest, cffi, six }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/fastprogress/default.nix b/pkgs/development/python-modules/fastprogress/default.nix
index 25cc2b8792f..9b43c05989f 100644
--- a/pkgs/development/python-modules/fastprogress/default.nix
+++ b/pkgs/development/python-modules/fastprogress/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , numpy
diff --git a/pkgs/development/python-modules/fastrlock/default.nix b/pkgs/development/python-modules/fastrlock/default.nix
index 7aedbbdd8f7..0821778d024 100644
--- a/pkgs/development/python-modules/fastrlock/default.nix
+++ b/pkgs/development/python-modules/fastrlock/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "fastrlock";
diff --git a/pkgs/development/python-modules/fasttext/default.nix b/pkgs/development/python-modules/fasttext/default.nix
index bf3bd987564..f3bddec76bd 100644
--- a/pkgs/development/python-modules/fasttext/default.nix
+++ b/pkgs/development/python-modules/fasttext/default.nix
@@ -1,4 +1,4 @@
-{lib, stdenv, buildPythonPackage, fetchFromGitHub, numpy, pkgs, pybind11 }:
+{lib, buildPythonPackage, fetchFromGitHub, numpy, pkgs, pybind11 }:
 
 buildPythonPackage rec {
   inherit (pkgs.fasttext) pname version src;
diff --git a/pkgs/development/python-modules/fdint/default.nix b/pkgs/development/python-modules/fdint/default.nix
index 4de0d18ca8b..413416c99a2 100644
--- a/pkgs/development/python-modules/fdint/default.nix
+++ b/pkgs/development/python-modules/fdint/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , cython
diff --git a/pkgs/development/python-modules/feedgen/default.nix b/pkgs/development/python-modules/feedgen/default.nix
index 509ffaed9d7..59ca95a0338 100644
--- a/pkgs/development/python-modules/feedgen/default.nix
+++ b/pkgs/development/python-modules/feedgen/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, dateutil, lxml }:
+{ lib, buildPythonPackage, fetchPypi, dateutil, lxml }:
 
 buildPythonPackage rec {
   pname = "feedgen";
diff --git a/pkgs/development/python-modules/feedgenerator/default.nix b/pkgs/development/python-modules/feedgenerator/default.nix
index 8508cc637f2..d5eb1306b39 100644
--- a/pkgs/development/python-modules/feedgenerator/default.nix
+++ b/pkgs/development/python-modules/feedgenerator/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, glibcLocales, fetchPypi, six, pytz }:
+{ lib, buildPythonPackage, glibcLocales, fetchPypi, six, pytz }:
 
 buildPythonPackage rec {
   pname = "feedgenerator";
diff --git a/pkgs/development/python-modules/feedparser/5.nix b/pkgs/development/python-modules/feedparser/5.nix
index a79048c5525..58cdad9884e 100644
--- a/pkgs/development/python-modules/feedparser/5.nix
+++ b/pkgs/development/python-modules/feedparser/5.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/feedparser/default.nix b/pkgs/development/python-modules/feedparser/default.nix
index 7b48fe6f73e..38e9761952d 100644
--- a/pkgs/development/python-modules/feedparser/default.nix
+++ b/pkgs/development/python-modules/feedparser/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy27
diff --git a/pkgs/development/python-modules/filebrowser_safe/default.nix b/pkgs/development/python-modules/filebrowser_safe/default.nix
index df132211d4f..0cc1eae5ac2 100644
--- a/pkgs/development/python-modules/filebrowser_safe/default.nix
+++ b/pkgs/development/python-modules/filebrowser_safe/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , django
diff --git a/pkgs/development/python-modules/filebytes/default.nix b/pkgs/development/python-modules/filebytes/default.nix
index bfac6a0e6b2..5b6d6284ced 100644
--- a/pkgs/development/python-modules/filebytes/default.nix
+++ b/pkgs/development/python-modules/filebytes/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/filelock/default.nix b/pkgs/development/python-modules/filelock/default.nix
index 77ddec306fc..97073bb6b03 100644
--- a/pkgs/development/python-modules/filelock/default.nix
+++ b/pkgs/development/python-modules/filelock/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "filelock";
diff --git a/pkgs/development/python-modules/filterpy/default.nix b/pkgs/development/python-modules/filterpy/default.nix
index 53059ce43d0..9740117b9b9 100644
--- a/pkgs/development/python-modules/filterpy/default.nix
+++ b/pkgs/development/python-modules/filterpy/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , numpy
diff --git a/pkgs/development/python-modules/fints/default.nix b/pkgs/development/python-modules/fints/default.nix
index 8e02dac5850..c4dfc04046b 100644
--- a/pkgs/development/python-modules/fints/default.nix
+++ b/pkgs/development/python-modules/fints/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub, isPy27
+{ lib, buildPythonPackage, fetchFromGitHub, isPy27
 , bleach
 , mt-940
 , pytest
diff --git a/pkgs/development/python-modules/fire/default.nix b/pkgs/development/python-modules/fire/default.nix
index 6a2cc594360..54f22032c6a 100644
--- a/pkgs/development/python-modules/fire/default.nix
+++ b/pkgs/development/python-modules/fire/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub, fetchpatch, six, hypothesis, mock
+{ lib, buildPythonPackage, fetchFromGitHub, fetchpatch, six, hypothesis, mock
 , python-Levenshtein, pytest, termcolor, isPy27, enum34 }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/first/default.nix b/pkgs/development/python-modules/first/default.nix
index a5bdf847eff..491fcd39805 100644
--- a/pkgs/development/python-modules/first/default.nix
+++ b/pkgs/development/python-modules/first/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "first";
diff --git a/pkgs/development/python-modules/flake8/default.nix b/pkgs/development/python-modules/flake8/default.nix
index 9e53ed28ff3..6f1d8181a58 100644
--- a/pkgs/development/python-modules/flake8/default.nix
+++ b/pkgs/development/python-modules/flake8/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, pythonOlder
+{ lib, buildPythonPackage, fetchPypi, pythonOlder
 , mock, pytest, pytestrunner
 , configparser, enum34, mccabe, pycodestyle, pyflakes, functools32, typing, importlib-metadata
 }:
diff --git a/pkgs/development/python-modules/flaky/default.nix b/pkgs/development/python-modules/flaky/default.nix
index 02b0641a34e..fe068211dfb 100644
--- a/pkgs/development/python-modules/flaky/default.nix
+++ b/pkgs/development/python-modules/flaky/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , mock
diff --git a/pkgs/development/python-modules/flask-babel/default.nix b/pkgs/development/python-modules/flask-babel/default.nix
index da6176e6781..602564d1626 100644
--- a/pkgs/development/python-modules/flask-babel/default.nix
+++ b/pkgs/development/python-modules/flask-babel/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , python
 , fetchPypi
diff --git a/pkgs/development/python-modules/flask-common/default.nix b/pkgs/development/python-modules/flask-common/default.nix
index 7dbf507f220..cba8e9e8efd 100644
--- a/pkgs/development/python-modules/flask-common/default.nix
+++ b/pkgs/development/python-modules/flask-common/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage
+{ lib, fetchPypi, buildPythonPackage
 , crayons, flask, flask-caching, gunicorn, maya, meinheld, whitenoise }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/flask-compress/default.nix b/pkgs/development/python-modules/flask-compress/default.nix
index 9491ca8be77..1e133df2b2b 100644
--- a/pkgs/development/python-modules/flask-compress/default.nix
+++ b/pkgs/development/python-modules/flask-compress/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage, flask
+{ lib, fetchPypi, buildPythonPackage, flask
 , brotli
 }:
 
diff --git a/pkgs/development/python-modules/flask-cors/default.nix b/pkgs/development/python-modules/flask-cors/default.nix
index 731e8b106ab..25c054b231b 100644
--- a/pkgs/development/python-modules/flask-cors/default.nix
+++ b/pkgs/development/python-modules/flask-cors/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage
+{ lib, fetchPypi, buildPythonPackage
 , nose, flask, six, packaging }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/flask-elastic/default.nix b/pkgs/development/python-modules/flask-elastic/default.nix
index 6986cd75be6..3a9daa577d4 100644
--- a/pkgs/development/python-modules/flask-elastic/default.nix
+++ b/pkgs/development/python-modules/flask-elastic/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , flask, elasticsearch }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/flask-jwt-extended/default.nix b/pkgs/development/python-modules/flask-jwt-extended/default.nix
index cf8a70b0533..580cd1f89f7 100644
--- a/pkgs/development/python-modules/flask-jwt-extended/default.nix
+++ b/pkgs/development/python-modules/flask-jwt-extended/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, dateutil, flask, pyjwt, werkzeug, pytest }:
+{ lib, buildPythonPackage, fetchPypi, dateutil, flask, pyjwt, werkzeug, pytest }:
 
 buildPythonPackage rec {
   pname = "Flask-JWT-Extended";
diff --git a/pkgs/development/python-modules/flask-ldap-login/default.nix b/pkgs/development/python-modules/flask-ldap-login/default.nix
index 1673ca24e6e..08aa2efb8f2 100644
--- a/pkgs/development/python-modules/flask-ldap-login/default.nix
+++ b/pkgs/development/python-modules/flask-ldap-login/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, isPy3k, fetchFromGitHub, fetchpatch
+{ lib, buildPythonPackage, isPy3k, fetchFromGitHub, fetchpatch
 , flask, flask_wtf, flask_testing, ldap
 , mock, nose }:
 
diff --git a/pkgs/development/python-modules/flask-limiter/default.nix b/pkgs/development/python-modules/flask-limiter/default.nix
index 38d42da1c8a..d22096f9149 100644
--- a/pkgs/development/python-modules/flask-limiter/default.nix
+++ b/pkgs/development/python-modules/flask-limiter/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage, flask, limits }:
+{ lib, fetchPypi, buildPythonPackage, flask, limits }:
 
 buildPythonPackage rec {
   pname = "Flask-Limiter";
diff --git a/pkgs/development/python-modules/flask-login/default.nix b/pkgs/development/python-modules/flask-login/default.nix
index 919e353eb8e..9d54849e92d 100644
--- a/pkgs/development/python-modules/flask-login/default.nix
+++ b/pkgs/development/python-modules/flask-login/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, pythonAtLeast
+{ lib, buildPythonPackage, fetchPypi, pythonAtLeast
 , flask, blinker, nose, mock, semantic-version }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/flask-reverse-proxy-fix/default.nix b/pkgs/development/python-modules/flask-reverse-proxy-fix/default.nix
index 550f6520e7d..18e48329288 100644
--- a/pkgs/development/python-modules/flask-reverse-proxy-fix/default.nix
+++ b/pkgs/development/python-modules/flask-reverse-proxy-fix/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 , isPy3k
diff --git a/pkgs/development/python-modules/flask-silk/default.nix b/pkgs/development/python-modules/flask-silk/default.nix
index 92d2f90848c..f6b6fd81528 100644
--- a/pkgs/development/python-modules/flask-silk/default.nix
+++ b/pkgs/development/python-modules/flask-silk/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 , flask
diff --git a/pkgs/development/python-modules/flask-sqlalchemy/default.nix b/pkgs/development/python-modules/flask-sqlalchemy/default.nix
index 16b8c9c7fc7..1bac82fb44f 100644
--- a/pkgs/development/python-modules/flask-sqlalchemy/default.nix
+++ b/pkgs/development/python-modules/flask-sqlalchemy/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, flask, mock, sqlalchemy, pytest }:
+{ lib, buildPythonPackage, fetchPypi, flask, mock, sqlalchemy, pytest }:
 
 buildPythonPackage rec {
   pname = "Flask-SQLAlchemy";
diff --git a/pkgs/development/python-modules/flask-swagger-ui/default.nix b/pkgs/development/python-modules/flask-swagger-ui/default.nix
index 79650e7c175..d238ba5acb7 100644
--- a/pkgs/development/python-modules/flask-swagger-ui/default.nix
+++ b/pkgs/development/python-modules/flask-swagger-ui/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, flask }:
+{ lib, buildPythonPackage, fetchPypi, flask }:
 
 buildPythonPackage rec {
   pname = "flask-swagger-ui";
diff --git a/pkgs/development/python-modules/flask-swagger/default.nix b/pkgs/development/python-modules/flask-swagger/default.nix
index 20624c31862..66c45b85522 100644
--- a/pkgs/development/python-modules/flask-swagger/default.nix
+++ b/pkgs/development/python-modules/flask-swagger/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , flask, pyyaml }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/flask-versioned/default.nix b/pkgs/development/python-modules/flask-versioned/default.nix
index 15e7b2c1875..e30abdb7cb4 100644
--- a/pkgs/development/python-modules/flask-versioned/default.nix
+++ b/pkgs/development/python-modules/flask-versioned/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub, flask }:
+{ lib, buildPythonPackage, fetchFromGitHub, flask }:
 
 buildPythonPackage rec {
   pname = "Flask-Versioned";
diff --git a/pkgs/development/python-modules/flask-wtf/default.nix b/pkgs/development/python-modules/flask-wtf/default.nix
index eadc7842a01..00af0ce61e9 100644
--- a/pkgs/development/python-modules/flask-wtf/default.nix
+++ b/pkgs/development/python-modules/flask-wtf/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage, flask, wtforms, nose }:
+{ lib, fetchPypi, buildPythonPackage, flask, wtforms, nose }:
 
 buildPythonPackage rec {
   pname = "Flask-WTF";
diff --git a/pkgs/development/python-modules/flask/default.nix b/pkgs/development/python-modules/flask/default.nix
index d121b4e32c8..27f436c3c53 100644
--- a/pkgs/development/python-modules/flask/default.nix
+++ b/pkgs/development/python-modules/flask/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , itsdangerous, click, werkzeug, jinja2, pytest }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/flaskbabel/default.nix b/pkgs/development/python-modules/flaskbabel/default.nix
index eef31359f50..d15950bba9a 100644
--- a/pkgs/development/python-modules/flaskbabel/default.nix
+++ b/pkgs/development/python-modules/flaskbabel/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , flask
diff --git a/pkgs/development/python-modules/flowlogs_reader/default.nix b/pkgs/development/python-modules/flowlogs_reader/default.nix
index 1a6591040a2..9fd36fab294 100644
--- a/pkgs/development/python-modules/flowlogs_reader/default.nix
+++ b/pkgs/development/python-modules/flowlogs_reader/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy27
diff --git a/pkgs/development/python-modules/flup/default.nix b/pkgs/development/python-modules/flup/default.nix
index 52ac5da27aa..fa19d9bdf7a 100644
--- a/pkgs/development/python-modules/flup/default.nix
+++ b/pkgs/development/python-modules/flup/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , isPy3k
 , fetchPypi
diff --git a/pkgs/development/python-modules/flux-led/default.nix b/pkgs/development/python-modules/flux-led/default.nix
index ddec811e21c..64eafed6c19 100644
--- a/pkgs/development/python-modules/flux-led/default.nix
+++ b/pkgs/development/python-modules/flux-led/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub
+{ lib, buildPythonPackage, fetchFromGitHub
 , aiohttp, zigpy
 , pytest, isPy27 }:
 
diff --git a/pkgs/development/python-modules/foolscap/default.nix b/pkgs/development/python-modules/foolscap/default.nix
index 396bef6d009..e0d38a5a131 100644
--- a/pkgs/development/python-modules/foolscap/default.nix
+++ b/pkgs/development/python-modules/foolscap/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , mock
diff --git a/pkgs/development/python-modules/forbiddenfruit/default.nix b/pkgs/development/python-modules/forbiddenfruit/default.nix
index 64713d96ade..1bb3b17e9df 100644
--- a/pkgs/development/python-modules/forbiddenfruit/default.nix
+++ b/pkgs/development/python-modules/forbiddenfruit/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , nose
diff --git a/pkgs/development/python-modules/foxdot/default.nix b/pkgs/development/python-modules/foxdot/default.nix
index d60c1e89900..072129e6ea5 100644
--- a/pkgs/development/python-modules/foxdot/default.nix
+++ b/pkgs/development/python-modules/foxdot/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, tkinter, supercollider }:
+{ lib, buildPythonPackage, fetchPypi, tkinter, supercollider }:
 
 buildPythonPackage rec {
   pname = "FoxDot";
diff --git a/pkgs/development/python-modules/freezegun/0.3.nix b/pkgs/development/python-modules/freezegun/0.3.nix
index 9dc88596f26..09ce8bbd11b 100644
--- a/pkgs/development/python-modules/freezegun/0.3.nix
+++ b/pkgs/development/python-modules/freezegun/0.3.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy27
diff --git a/pkgs/development/python-modules/freezegun/default.nix b/pkgs/development/python-modules/freezegun/default.nix
index f1b1d9738d7..4c5a87e8266 100644
--- a/pkgs/development/python-modules/freezegun/default.nix
+++ b/pkgs/development/python-modules/freezegun/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , pythonOlder
 , fetchPypi
diff --git a/pkgs/development/python-modules/fritzconnection/default.nix b/pkgs/development/python-modules/fritzconnection/default.nix
index 571fba1a8ac..b8312d1c8ec 100644
--- a/pkgs/development/python-modules/fritzconnection/default.nix
+++ b/pkgs/development/python-modules/fritzconnection/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, pythonOlder, fetchFromGitHub, pytestCheckHook, requests }:
+{ lib, buildPythonPackage, pythonOlder, fetchFromGitHub, pytestCheckHook, requests }:
 
 buildPythonPackage rec {
   pname = "fritzconnection";
diff --git a/pkgs/development/python-modules/frozendict/default.nix b/pkgs/development/python-modules/frozendict/default.nix
index dd0c9929826..e172f3815b7 100644
--- a/pkgs/development/python-modules/frozendict/default.nix
+++ b/pkgs/development/python-modules/frozendict/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "frozendict";
diff --git a/pkgs/development/python-modules/ftfy/default.nix b/pkgs/development/python-modules/ftfy/default.nix
index 63342c7045d..dbc36317228 100644
--- a/pkgs/development/python-modules/ftfy/default.nix
+++ b/pkgs/development/python-modules/ftfy/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , isPy3k
 , fetchPypi
diff --git a/pkgs/development/python-modules/fudge/default.nix b/pkgs/development/python-modules/fudge/default.nix
index 3f53b66d1ef..ba97b2e8f47 100644
--- a/pkgs/development/python-modules/fudge/default.nix
+++ b/pkgs/development/python-modules/fudge/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , nose
diff --git a/pkgs/development/python-modules/funcparserlib/default.nix b/pkgs/development/python-modules/funcparserlib/default.nix
index 773ed1dccd6..19e2dd146d2 100644
--- a/pkgs/development/python-modules/funcparserlib/default.nix
+++ b/pkgs/development/python-modules/funcparserlib/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , python
diff --git a/pkgs/development/python-modules/funcsigs/default.nix b/pkgs/development/python-modules/funcsigs/default.nix
index 1464baa57df..8a7335accda 100644
--- a/pkgs/development/python-modules/funcsigs/default.nix
+++ b/pkgs/development/python-modules/funcsigs/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , isPyPy, isPy3k, unittest2
 }:
 
diff --git a/pkgs/development/python-modules/functools32/default.nix b/pkgs/development/python-modules/functools32/default.nix
index cec9da42395..be907e963c1 100644
--- a/pkgs/development/python-modules/functools32/default.nix
+++ b/pkgs/development/python-modules/functools32/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy3k
diff --git a/pkgs/development/python-modules/funcy/default.nix b/pkgs/development/python-modules/funcy/default.nix
index 3db08cf22bb..515f0925caf 100644
--- a/pkgs/development/python-modules/funcy/default.nix
+++ b/pkgs/development/python-modules/funcy/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/furl/default.nix b/pkgs/development/python-modules/furl/default.nix
index b7592885007..72089da11e1 100644
--- a/pkgs/development/python-modules/furl/default.nix
+++ b/pkgs/development/python-modules/furl/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, flake8, six, orderedmultidict, pytest }:
+{ lib, buildPythonPackage, fetchPypi, flake8, six, orderedmultidict, pytest }:
 
 buildPythonPackage rec {
   pname = "furl";
diff --git a/pkgs/development/python-modules/fuse-python/default.nix b/pkgs/development/python-modules/fuse-python/default.nix
index a130fab0d7e..14f2cb584ea 100644
--- a/pkgs/development/python-modules/fuse-python/default.nix
+++ b/pkgs/development/python-modules/fuse-python/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, pkg-config, fuse }:
+{ lib, buildPythonPackage, fetchPypi, pkg-config, fuse }:
 
 buildPythonPackage rec {
   pname = "fuse-python";
diff --git a/pkgs/development/python-modules/fusepy/default.nix b/pkgs/development/python-modules/fusepy/default.nix
index 858d3e13ea0..45b70863042 100644
--- a/pkgs/development/python-modules/fusepy/default.nix
+++ b/pkgs/development/python-modules/fusepy/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pkgs
diff --git a/pkgs/development/python-modules/fuzzywuzzy/default.nix b/pkgs/development/python-modules/fuzzywuzzy/default.nix
index c2d16a55984..0bcf8efc359 100644
--- a/pkgs/development/python-modules/fuzzywuzzy/default.nix
+++ b/pkgs/development/python-modules/fuzzywuzzy/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, python-Levenshtein, pycodestyle, hypothesis, pytest }:
+{ lib, buildPythonPackage, fetchPypi, python-Levenshtein, pycodestyle, hypothesis, pytest }:
 
 buildPythonPackage rec {
   pname = "fuzzywuzzy";
diff --git a/pkgs/development/python-modules/gast/default.nix b/pkgs/development/python-modules/gast/default.nix
index e4dbe43ef8d..38334d5cc6b 100644
--- a/pkgs/development/python-modules/gast/default.nix
+++ b/pkgs/development/python-modules/gast/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage, astunparse }:
+{ lib, fetchPypi, buildPythonPackage, astunparse }:
 
 buildPythonPackage rec {
   pname = "gast";
diff --git a/pkgs/development/python-modules/gateone/default.nix b/pkgs/development/python-modules/gateone/default.nix
index 981cbbb7e8c..5c45e875e5d 100644
--- a/pkgs/development/python-modules/gateone/default.nix
+++ b/pkgs/development/python-modules/gateone/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , tornado
 , futures
diff --git a/pkgs/development/python-modules/gcovr/default.nix b/pkgs/development/python-modules/gcovr/default.nix
index bedb7f3a375..1332777189b 100644
--- a/pkgs/development/python-modules/gcovr/default.nix
+++ b/pkgs/development/python-modules/gcovr/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , jinja2
diff --git a/pkgs/development/python-modules/gdata/default.nix b/pkgs/development/python-modules/gdata/default.nix
index bf9c01c250a..94430d0d941 100644
--- a/pkgs/development/python-modules/gdata/default.nix
+++ b/pkgs/development/python-modules/gdata/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchurl
 }:
diff --git a/pkgs/development/python-modules/gdrivefs/default.nix b/pkgs/development/python-modules/gdrivefs/default.nix
index aab5efea97d..6060dc3a5bb 100644
--- a/pkgs/development/python-modules/gdrivefs/default.nix
+++ b/pkgs/development/python-modules/gdrivefs/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchurl
 , isPy3k
diff --git a/pkgs/development/python-modules/geeknote/default.nix b/pkgs/development/python-modules/geeknote/default.nix
index 4eb209a8af7..6c416548184 100644
--- a/pkgs/development/python-modules/geeknote/default.nix
+++ b/pkgs/development/python-modules/geeknote/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 , isPy27
diff --git a/pkgs/development/python-modules/genanki/default.nix b/pkgs/development/python-modules/genanki/default.nix
index f43fdabf09e..3f217afd8bb 100644
--- a/pkgs/development/python-modules/genanki/default.nix
+++ b/pkgs/development/python-modules/genanki/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, isPy3k
+{ lib, buildPythonPackage, fetchPypi, isPy3k
 , cached-property, frozendict, pystache, pyyaml, pytest, pytestrunner
 }:
 
diff --git a/pkgs/development/python-modules/genshi/default.nix b/pkgs/development/python-modules/genshi/default.nix
index 9a6e4508e30..c476960bbf8 100644
--- a/pkgs/development/python-modules/genshi/default.nix
+++ b/pkgs/development/python-modules/genshi/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , setuptools
diff --git a/pkgs/development/python-modules/genzshcomp/default.nix b/pkgs/development/python-modules/genzshcomp/default.nix
index 8f486cc29ef..a848eff41a6 100644
--- a/pkgs/development/python-modules/genzshcomp/default.nix
+++ b/pkgs/development/python-modules/genzshcomp/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , setuptools
diff --git a/pkgs/development/python-modules/geoalchemy2/default.nix b/pkgs/development/python-modules/geoalchemy2/default.nix
index 56f9346668f..b629d48c61f 100644
--- a/pkgs/development/python-modules/geoalchemy2/default.nix
+++ b/pkgs/development/python-modules/geoalchemy2/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , sqlalchemy
diff --git a/pkgs/development/python-modules/geographiclib/default.nix b/pkgs/development/python-modules/geographiclib/default.nix
index 98c1ee417e4..5167b986604 100644
--- a/pkgs/development/python-modules/geographiclib/default.nix
+++ b/pkgs/development/python-modules/geographiclib/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/geopy/2.nix b/pkgs/development/python-modules/geopy/2.nix
index ae4e07e2547..48df43e2217 100644
--- a/pkgs/development/python-modules/geopy/2.nix
+++ b/pkgs/development/python-modules/geopy/2.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy27
diff --git a/pkgs/development/python-modules/gevent-socketio/default.nix b/pkgs/development/python-modules/gevent-socketio/default.nix
index 88d1089d5a3..4a25e0d7e14 100644
--- a/pkgs/development/python-modules/gevent-socketio/default.nix
+++ b/pkgs/development/python-modules/gevent-socketio/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , versiontools
diff --git a/pkgs/development/python-modules/gevent-websocket/default.nix b/pkgs/development/python-modules/gevent-websocket/default.nix
index 431a0c09a30..7ff62a378ca 100644
--- a/pkgs/development/python-modules/gevent-websocket/default.nix
+++ b/pkgs/development/python-modules/gevent-websocket/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy3k
diff --git a/pkgs/development/python-modules/gevent/default.nix b/pkgs/development/python-modules/gevent/default.nix
index 0fcf6cdfaaa..3fe9e648ce3 100644
--- a/pkgs/development/python-modules/gevent/default.nix
+++ b/pkgs/development/python-modules/gevent/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage, isPyPy, python, libev, greenlet
+{ lib, fetchPypi, buildPythonPackage, isPyPy, python, libev, greenlet
 , zope_interface
 }:
 
diff --git a/pkgs/development/python-modules/geventhttpclient/default.nix b/pkgs/development/python-modules/geventhttpclient/default.nix
index fafbef12bd3..c82da3c8a98 100644
--- a/pkgs/development/python-modules/geventhttpclient/default.nix
+++ b/pkgs/development/python-modules/geventhttpclient/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pytest
diff --git a/pkgs/development/python-modules/ghdiff/default.nix b/pkgs/development/python-modules/ghdiff/default.nix
index a9582648117..efbdc2f59f9 100644
--- a/pkgs/development/python-modules/ghdiff/default.nix
+++ b/pkgs/development/python-modules/ghdiff/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , zope_testrunner, six, chardet}:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/gipc/default.nix b/pkgs/development/python-modules/gipc/default.nix
index a48547f2909..8df2808328f 100644
--- a/pkgs/development/python-modules/gipc/default.nix
+++ b/pkgs/development/python-modules/gipc/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , gevent
diff --git a/pkgs/development/python-modules/git-annex-adapter/default.nix b/pkgs/development/python-modules/git-annex-adapter/default.nix
index 5922377ab3a..d41874cff3b 100644
--- a/pkgs/development/python-modules/git-annex-adapter/default.nix
+++ b/pkgs/development/python-modules/git-annex-adapter/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, isPy3k, fetchFromGitHub, fetchpatch, substituteAll
+{ lib, buildPythonPackage, isPy3k, fetchFromGitHub, fetchpatch, substituteAll
 , python, util-linux, pygit2, gitMinimal, git-annex, cacert
 }:
 
diff --git a/pkgs/development/python-modules/git-sweep/default.nix b/pkgs/development/python-modules/git-sweep/default.nix
index adb9de4dbc0..2b17a46190b 100644
--- a/pkgs/development/python-modules/git-sweep/default.nix
+++ b/pkgs/development/python-modules/git-sweep/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , GitPython
diff --git a/pkgs/development/python-modules/globre/default.nix b/pkgs/development/python-modules/globre/default.nix
index 21d2983ab01..5debd1d0ab6 100644
--- a/pkgs/development/python-modules/globre/default.nix
+++ b/pkgs/development/python-modules/globre/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , pythonAtLeast
 , buildPythonPackage
 , fetchPypi
diff --git a/pkgs/development/python-modules/glom/default.nix b/pkgs/development/python-modules/glom/default.nix
index 2acc87a17ac..89f0de47490 100644
--- a/pkgs/development/python-modules/glom/default.nix
+++ b/pkgs/development/python-modules/glom/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , boltons
diff --git a/pkgs/development/python-modules/gmpy2/default.nix b/pkgs/development/python-modules/gmpy2/default.nix
index 808b918681b..204415d7531 100644
--- a/pkgs/development/python-modules/gmpy2/default.nix
+++ b/pkgs/development/python-modules/gmpy2/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 , fetchpatch
diff --git a/pkgs/development/python-modules/gmusicapi/default.nix b/pkgs/development/python-modules/gmusicapi/default.nix
index 821e0ba0afa..1797f1d4264 100644
--- a/pkgs/development/python-modules/gmusicapi/default.nix
+++ b/pkgs/development/python-modules/gmusicapi/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , validictory
diff --git a/pkgs/development/python-modules/gnureadline/default.nix b/pkgs/development/python-modules/gnureadline/default.nix
index 71116c37041..6f3ae30e8cd 100644
--- a/pkgs/development/python-modules/gnureadline/default.nix
+++ b/pkgs/development/python-modules/gnureadline/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPyPy
diff --git a/pkgs/development/python-modules/gnutls/default.nix b/pkgs/development/python-modules/gnutls/default.nix
index addbee81bd3..3c68a1713a0 100644
--- a/pkgs/development/python-modules/gnutls/default.nix
+++ b/pkgs/development/python-modules/gnutls/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy3k
diff --git a/pkgs/development/python-modules/goobook/default.nix b/pkgs/development/python-modules/goobook/default.nix
index c587c928e7e..83175b6c86a 100644
--- a/pkgs/development/python-modules/goobook/default.nix
+++ b/pkgs/development/python-modules/goobook/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, isPy3k
+{ lib, buildPythonPackage, fetchPypi, isPy3k
 , docutils, installShellFiles
 , google_api_python_client, simplejson, oauth2client, setuptools, xdg
 }:
diff --git a/pkgs/development/python-modules/google-apputils/default.nix b/pkgs/development/python-modules/google-apputils/default.nix
index 7cc7f485882..321837f56ae 100644
--- a/pkgs/development/python-modules/google-apputils/default.nix
+++ b/pkgs/development/python-modules/google-apputils/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy3k
diff --git a/pkgs/development/python-modules/google-auth/default.nix b/pkgs/development/python-modules/google-auth/default.nix
index 9120f93a3bd..22b02552cd7 100644
--- a/pkgs/development/python-modules/google-auth/default.nix
+++ b/pkgs/development/python-modules/google-auth/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchpatch
 , fetchPypi
diff --git a/pkgs/development/python-modules/google-cloud-asset/default.nix b/pkgs/development/python-modules/google-cloud-asset/default.nix
index 8f04fb7451d..aec3b51acb5 100644
--- a/pkgs/development/python-modules/google-cloud-asset/default.nix
+++ b/pkgs/development/python-modules/google-cloud-asset/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , grpc_google_iam_v1
diff --git a/pkgs/development/python-modules/google-cloud-automl/default.nix b/pkgs/development/python-modules/google-cloud-automl/default.nix
index 302ce8ceaed..83fe052a542 100644
--- a/pkgs/development/python-modules/google-cloud-automl/default.nix
+++ b/pkgs/development/python-modules/google-cloud-automl/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pytestCheckHook
diff --git a/pkgs/development/python-modules/google-cloud-bigquery-datatransfer/default.nix b/pkgs/development/python-modules/google-cloud-bigquery-datatransfer/default.nix
index 4ec12a8fa2f..8f67fed79d7 100644
--- a/pkgs/development/python-modules/google-cloud-bigquery-datatransfer/default.nix
+++ b/pkgs/development/python-modules/google-cloud-bigquery-datatransfer/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , google-api-core
diff --git a/pkgs/development/python-modules/google-cloud-bigquery/default.nix b/pkgs/development/python-modules/google-cloud-bigquery/default.nix
index 5eab2c730f7..a99588199bf 100644
--- a/pkgs/development/python-modules/google-cloud-bigquery/default.nix
+++ b/pkgs/development/python-modules/google-cloud-bigquery/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pytestCheckHook
diff --git a/pkgs/development/python-modules/google-cloud-bigtable/default.nix b/pkgs/development/python-modules/google-cloud-bigtable/default.nix
index 9632dc902d1..93cbc22b7cd 100644
--- a/pkgs/development/python-modules/google-cloud-bigtable/default.nix
+++ b/pkgs/development/python-modules/google-cloud-bigtable/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , grpc_google_iam_v1
diff --git a/pkgs/development/python-modules/google-cloud-container/default.nix b/pkgs/development/python-modules/google-cloud-container/default.nix
index 6d91bed83ae..1cf94d220e6 100644
--- a/pkgs/development/python-modules/google-cloud-container/default.nix
+++ b/pkgs/development/python-modules/google-cloud-container/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , google-api-core
diff --git a/pkgs/development/python-modules/google-cloud-core/default.nix b/pkgs/development/python-modules/google-cloud-core/default.nix
index 72709c62cec..44764a4edb1 100644
--- a/pkgs/development/python-modules/google-cloud-core/default.nix
+++ b/pkgs/development/python-modules/google-cloud-core/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pythonOlder
diff --git a/pkgs/development/python-modules/google-cloud-dataproc/default.nix b/pkgs/development/python-modules/google-cloud-dataproc/default.nix
index 1b7a570fed2..095e01fbbd7 100644
--- a/pkgs/development/python-modules/google-cloud-dataproc/default.nix
+++ b/pkgs/development/python-modules/google-cloud-dataproc/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , google-api-core
diff --git a/pkgs/development/python-modules/google-cloud-datastore/default.nix b/pkgs/development/python-modules/google-cloud-datastore/default.nix
index 84f98550b9a..4c8c79c7dda 100644
--- a/pkgs/development/python-modules/google-cloud-datastore/default.nix
+++ b/pkgs/development/python-modules/google-cloud-datastore/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , google-api-core
diff --git a/pkgs/development/python-modules/google-cloud-dlp/default.nix b/pkgs/development/python-modules/google-cloud-dlp/default.nix
index 9076c129804..451607a5357 100644
--- a/pkgs/development/python-modules/google-cloud-dlp/default.nix
+++ b/pkgs/development/python-modules/google-cloud-dlp/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , google-api-core
diff --git a/pkgs/development/python-modules/google-cloud-dns/default.nix b/pkgs/development/python-modules/google-cloud-dns/default.nix
index 0636da60e9a..fa4c8c6c52d 100644
--- a/pkgs/development/python-modules/google-cloud-dns/default.nix
+++ b/pkgs/development/python-modules/google-cloud-dns/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , google-api-core
diff --git a/pkgs/development/python-modules/google-cloud-error-reporting/default.nix b/pkgs/development/python-modules/google-cloud-error-reporting/default.nix
index b3181f8fcde..1457c044fe5 100644
--- a/pkgs/development/python-modules/google-cloud-error-reporting/default.nix
+++ b/pkgs/development/python-modules/google-cloud-error-reporting/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pytestCheckHook
diff --git a/pkgs/development/python-modules/google-cloud-firestore/default.nix b/pkgs/development/python-modules/google-cloud-firestore/default.nix
index f0c235ca0c9..30ef0af76a1 100644
--- a/pkgs/development/python-modules/google-cloud-firestore/default.nix
+++ b/pkgs/development/python-modules/google-cloud-firestore/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , aiounittest
diff --git a/pkgs/development/python-modules/google-cloud-iot/default.nix b/pkgs/development/python-modules/google-cloud-iot/default.nix
index 2b28f84a315..ac511f80647 100644
--- a/pkgs/development/python-modules/google-cloud-iot/default.nix
+++ b/pkgs/development/python-modules/google-cloud-iot/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , grpc_google_iam_v1
diff --git a/pkgs/development/python-modules/google-cloud-kms/default.nix b/pkgs/development/python-modules/google-cloud-kms/default.nix
index 6675767a244..94dd7c1ba8f 100644
--- a/pkgs/development/python-modules/google-cloud-kms/default.nix
+++ b/pkgs/development/python-modules/google-cloud-kms/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pytestCheckHook
diff --git a/pkgs/development/python-modules/google-cloud-language/default.nix b/pkgs/development/python-modules/google-cloud-language/default.nix
index 7186ecd6f35..c43c51d97f7 100644
--- a/pkgs/development/python-modules/google-cloud-language/default.nix
+++ b/pkgs/development/python-modules/google-cloud-language/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , google-api-core
diff --git a/pkgs/development/python-modules/google-cloud-logging/default.nix b/pkgs/development/python-modules/google-cloud-logging/default.nix
index 58d03f206fc..b8ffa935fc3 100644
--- a/pkgs/development/python-modules/google-cloud-logging/default.nix
+++ b/pkgs/development/python-modules/google-cloud-logging/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , django
diff --git a/pkgs/development/python-modules/google-cloud-monitoring/default.nix b/pkgs/development/python-modules/google-cloud-monitoring/default.nix
index 8dc665fe210..f8fc079aa3e 100644
--- a/pkgs/development/python-modules/google-cloud-monitoring/default.nix
+++ b/pkgs/development/python-modules/google-cloud-monitoring/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , google-api-core
diff --git a/pkgs/development/python-modules/google-cloud-pubsub/default.nix b/pkgs/development/python-modules/google-cloud-pubsub/default.nix
index 46a28b1ffd1..d3846ad4f42 100644
--- a/pkgs/development/python-modules/google-cloud-pubsub/default.nix
+++ b/pkgs/development/python-modules/google-cloud-pubsub/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pytestCheckHook
diff --git a/pkgs/development/python-modules/google-cloud-redis/default.nix b/pkgs/development/python-modules/google-cloud-redis/default.nix
index 4dcf7fd3d31..86fbc360d73 100644
--- a/pkgs/development/python-modules/google-cloud-redis/default.nix
+++ b/pkgs/development/python-modules/google-cloud-redis/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , google-api-core
diff --git a/pkgs/development/python-modules/google-cloud-resource-manager/default.nix b/pkgs/development/python-modules/google-cloud-resource-manager/default.nix
index 11baf3d73f3..8a265182fba 100644
--- a/pkgs/development/python-modules/google-cloud-resource-manager/default.nix
+++ b/pkgs/development/python-modules/google-cloud-resource-manager/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pytestCheckHook
diff --git a/pkgs/development/python-modules/google-cloud-runtimeconfig/default.nix b/pkgs/development/python-modules/google-cloud-runtimeconfig/default.nix
index 81fa97f152b..0a3285566f1 100644
--- a/pkgs/development/python-modules/google-cloud-runtimeconfig/default.nix
+++ b/pkgs/development/python-modules/google-cloud-runtimeconfig/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , google-api-core
diff --git a/pkgs/development/python-modules/google-cloud-securitycenter/default.nix b/pkgs/development/python-modules/google-cloud-securitycenter/default.nix
index 242198a2197..184044594d5 100644
--- a/pkgs/development/python-modules/google-cloud-securitycenter/default.nix
+++ b/pkgs/development/python-modules/google-cloud-securitycenter/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , grpc_google_iam_v1
diff --git a/pkgs/development/python-modules/google-cloud-spanner/default.nix b/pkgs/development/python-modules/google-cloud-spanner/default.nix
index 382476af0ca..759a8f25c1a 100644
--- a/pkgs/development/python-modules/google-cloud-spanner/default.nix
+++ b/pkgs/development/python-modules/google-cloud-spanner/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , grpc_google_iam_v1
diff --git a/pkgs/development/python-modules/google-cloud-speech/default.nix b/pkgs/development/python-modules/google-cloud-speech/default.nix
index 3359cfdd743..c57329eebcc 100644
--- a/pkgs/development/python-modules/google-cloud-speech/default.nix
+++ b/pkgs/development/python-modules/google-cloud-speech/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , google-api-core
diff --git a/pkgs/development/python-modules/google-cloud-tasks/default.nix b/pkgs/development/python-modules/google-cloud-tasks/default.nix
index e30986af610..5911bfe6156 100644
--- a/pkgs/development/python-modules/google-cloud-tasks/default.nix
+++ b/pkgs/development/python-modules/google-cloud-tasks/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , google-api-core
diff --git a/pkgs/development/python-modules/google-cloud-testutils/default.nix b/pkgs/development/python-modules/google-cloud-testutils/default.nix
index 3f6792fa77b..2380e9183b7 100644
--- a/pkgs/development/python-modules/google-cloud-testutils/default.nix
+++ b/pkgs/development/python-modules/google-cloud-testutils/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, google-auth, six }:
+{ lib, buildPythonPackage, fetchPypi, google-auth, six }:
 
 buildPythonPackage rec {
   pname = "google-cloud-testutils";
diff --git a/pkgs/development/python-modules/google-cloud-texttospeech/default.nix b/pkgs/development/python-modules/google-cloud-texttospeech/default.nix
index a7228a42999..3c84c21344a 100644
--- a/pkgs/development/python-modules/google-cloud-texttospeech/default.nix
+++ b/pkgs/development/python-modules/google-cloud-texttospeech/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pytestCheckHook
diff --git a/pkgs/development/python-modules/google-cloud-trace/default.nix b/pkgs/development/python-modules/google-cloud-trace/default.nix
index 1252c99bf48..486a71c7a97 100644
--- a/pkgs/development/python-modules/google-cloud-trace/default.nix
+++ b/pkgs/development/python-modules/google-cloud-trace/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , google-api-core
diff --git a/pkgs/development/python-modules/google-cloud-translate/default.nix b/pkgs/development/python-modules/google-cloud-translate/default.nix
index 32d402e1cf0..2b0ac55fa2e 100644
--- a/pkgs/development/python-modules/google-cloud-translate/default.nix
+++ b/pkgs/development/python-modules/google-cloud-translate/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pytestCheckHook
diff --git a/pkgs/development/python-modules/google-cloud-videointelligence/default.nix b/pkgs/development/python-modules/google-cloud-videointelligence/default.nix
index 43fed1fe27f..26e3320a5cc 100644
--- a/pkgs/development/python-modules/google-cloud-videointelligence/default.nix
+++ b/pkgs/development/python-modules/google-cloud-videointelligence/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , mock
diff --git a/pkgs/development/python-modules/google-cloud-vision/default.nix b/pkgs/development/python-modules/google-cloud-vision/default.nix
index 57a51f96e65..12f63bd0e1c 100644
--- a/pkgs/development/python-modules/google-cloud-vision/default.nix
+++ b/pkgs/development/python-modules/google-cloud-vision/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , google-api-core
diff --git a/pkgs/development/python-modules/google-cloud-websecurityscanner/default.nix b/pkgs/development/python-modules/google-cloud-websecurityscanner/default.nix
index 20614f5b5d8..ac91ab85bd6 100644
--- a/pkgs/development/python-modules/google-cloud-websecurityscanner/default.nix
+++ b/pkgs/development/python-modules/google-cloud-websecurityscanner/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pytestCheckHook
diff --git a/pkgs/development/python-modules/googleapis_common_protos/default.nix b/pkgs/development/python-modules/googleapis_common_protos/default.nix
index 7e5b786b4fb..898971629ae 100644
--- a/pkgs/development/python-modules/googleapis_common_protos/default.nix
+++ b/pkgs/development/python-modules/googleapis_common_protos/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , grpc
diff --git a/pkgs/development/python-modules/googlemaps/default.nix b/pkgs/development/python-modules/googlemaps/default.nix
index c971119833e..007d4eb2cea 100644
--- a/pkgs/development/python-modules/googlemaps/default.nix
+++ b/pkgs/development/python-modules/googlemaps/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 , requests
diff --git a/pkgs/development/python-modules/gorilla/default.nix b/pkgs/development/python-modules/gorilla/default.nix
index bf4212edc51..42da4541647 100644
--- a/pkgs/development/python-modules/gorilla/default.nix
+++ b/pkgs/development/python-modules/gorilla/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi}:
+{ lib, buildPythonPackage, fetchPypi}:
 
 buildPythonPackage rec {
   pname = "gorilla";
diff --git a/pkgs/development/python-modules/gpapi/default.nix b/pkgs/development/python-modules/gpapi/default.nix
index 788473b5ab8..6ed9f48dd61 100644
--- a/pkgs/development/python-modules/gpapi/default.nix
+++ b/pkgs/development/python-modules/gpapi/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, pythonOlder
+{ lib, buildPythonPackage, fetchPypi, pythonOlder
 , requests
 , protobuf
 , pycryptodome
diff --git a/pkgs/development/python-modules/gphoto2/default.nix b/pkgs/development/python-modules/gphoto2/default.nix
index 0dd68918aed..31ac03347cb 100644
--- a/pkgs/development/python-modules/gphoto2/default.nix
+++ b/pkgs/development/python-modules/gphoto2/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage
+{ lib, fetchPypi, buildPythonPackage
 , pkg-config
 , libgphoto2 }:
 
diff --git a/pkgs/development/python-modules/gplaycli/default.nix b/pkgs/development/python-modules/gplaycli/default.nix
index ecd52ad848c..28f244bc354 100644
--- a/pkgs/development/python-modules/gplaycli/default.nix
+++ b/pkgs/development/python-modules/gplaycli/default.nix
@@ -1,4 +1,4 @@
-{ buildPythonPackage, lib, stdenv, libffi, isPy3k, pyasn1, clint, ndg-httpsclient
+{ buildPythonPackage, lib, libffi, isPy3k, pyasn1, clint, ndg-httpsclient
 , protobuf, requests, args, gpapi, pyaxmlparser, fetchFromGitHub
 }:
 
diff --git a/pkgs/development/python-modules/gpsoauth/default.nix b/pkgs/development/python-modules/gpsoauth/default.nix
index 2c4dfcd8139..1ad50642e2b 100644
--- a/pkgs/development/python-modules/gpsoauth/default.nix
+++ b/pkgs/development/python-modules/gpsoauth/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , cffi
diff --git a/pkgs/development/python-modules/gpyopt/default.nix b/pkgs/development/python-modules/gpyopt/default.nix
index 22e6743582c..85b6efabaa8 100644
--- a/pkgs/development/python-modules/gpyopt/default.nix
+++ b/pkgs/development/python-modules/gpyopt/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub, setuptools
+{ lib, buildPythonPackage, fetchFromGitHub, setuptools
 , numpy, scipy, gpy, emcee, nose }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/gradient_sdk/default.nix b/pkgs/development/python-modules/gradient_sdk/default.nix
index adaafd8eadb..3dffb38f2ff 100644
--- a/pkgs/development/python-modules/gradient_sdk/default.nix
+++ b/pkgs/development/python-modules/gradient_sdk/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage
+{ lib, fetchPypi, buildPythonPackage
 , hyperopt
 }:
 
diff --git a/pkgs/development/python-modules/gradient_statsd/default.nix b/pkgs/development/python-modules/gradient_statsd/default.nix
index 607737d99ae..ada005d14f8 100644
--- a/pkgs/development/python-modules/gradient_statsd/default.nix
+++ b/pkgs/development/python-modules/gradient_statsd/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage
+{ lib, fetchPypi, buildPythonPackage
 , boto3, requests, datadog, configparser, python
 }:
 
diff --git a/pkgs/development/python-modules/graphite-web/default.nix b/pkgs/development/python-modules/graphite-web/default.nix
index 0bced13cd11..17ac9132916 100644
--- a/pkgs/development/python-modules/graphite-web/default.nix
+++ b/pkgs/development/python-modules/graphite-web/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, isPy3k
+{ lib, buildPythonPackage, fetchPypi, isPy3k
 , django, django_tagging, whisper, pycairo, cairocffi, ldap, memcached, pytz, urllib3, scandir
 }:
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/graphite_beacon/default.nix b/pkgs/development/python-modules/graphite_beacon/default.nix
index 06b66ccbc14..20522d28304 100644
--- a/pkgs/development/python-modules/graphite_beacon/default.nix
+++ b/pkgs/development/python-modules/graphite_beacon/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , tornado_5, pyyaml, funcparserlib
 , nixosTests
 }:
diff --git a/pkgs/development/python-modules/grappelli_safe/default.nix b/pkgs/development/python-modules/grappelli_safe/default.nix
index 7b2dd7e3fed..ae7ddb0c76b 100644
--- a/pkgs/development/python-modules/grappelli_safe/default.nix
+++ b/pkgs/development/python-modules/grappelli_safe/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/grequests/default.nix b/pkgs/development/python-modules/grequests/default.nix
index 5ce5df8cdea..50c95df7dc9 100644
--- a/pkgs/development/python-modules/grequests/default.nix
+++ b/pkgs/development/python-modules/grequests/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , requests
diff --git a/pkgs/development/python-modules/grip/default.nix b/pkgs/development/python-modules/grip/default.nix
index 019cd798d64..dafa692493e 100644
--- a/pkgs/development/python-modules/grip/default.nix
+++ b/pkgs/development/python-modules/grip/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , fetchFromGitHub
 , fetchpatch
 # Python bits:
diff --git a/pkgs/development/python-modules/grpc_google_iam_v1/default.nix b/pkgs/development/python-modules/grpc_google_iam_v1/default.nix
index dd9527006da..7291cd4b65e 100644
--- a/pkgs/development/python-modules/grpc_google_iam_v1/default.nix
+++ b/pkgs/development/python-modules/grpc_google_iam_v1/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , grpcio
diff --git a/pkgs/development/python-modules/grpcio-gcp/default.nix b/pkgs/development/python-modules/grpcio-gcp/default.nix
index 1b631c0973e..656e147ac50 100644
--- a/pkgs/development/python-modules/grpcio-gcp/default.nix
+++ b/pkgs/development/python-modules/grpcio-gcp/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , grpcio
diff --git a/pkgs/development/python-modules/gsd/1.7.nix b/pkgs/development/python-modules/gsd/1.7.nix
index 0512a4906a2..8d19acdc70d 100644
--- a/pkgs/development/python-modules/gsd/1.7.nix
+++ b/pkgs/development/python-modules/gsd/1.7.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , numpy
diff --git a/pkgs/development/python-modules/gspread/default.nix b/pkgs/development/python-modules/gspread/default.nix
index 7cf2a8c8df1..0370f80b4a4 100644
--- a/pkgs/development/python-modules/gspread/default.nix
+++ b/pkgs/development/python-modules/gspread/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , requests
diff --git a/pkgs/development/python-modules/gst-python/default.nix b/pkgs/development/python-modules/gst-python/default.nix
index 9ff8434cc9a..ea89f7214c6 100644
--- a/pkgs/development/python-modules/gst-python/default.nix
+++ b/pkgs/development/python-modules/gst-python/default.nix
@@ -3,7 +3,7 @@
 , fetchurl
 , meson
 , ninja
-, stdenv
+
 , pkg-config
 , python3
 , pygobject3
diff --git a/pkgs/development/python-modules/gtimelog/default.nix b/pkgs/development/python-modules/gtimelog/default.nix
index 3af8e97ba71..bb31baa7888 100644
--- a/pkgs/development/python-modules/gtimelog/default.nix
+++ b/pkgs/development/python-modules/gtimelog/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, makeWrapper
+{ lib, fetchFromGitHub, makeWrapper
 , glibcLocales, gobject-introspection, gtk3, libsoup, libsecret
 , buildPythonPackage, python
 , pygobject3, freezegun, mock
diff --git a/pkgs/development/python-modules/guestfs/default.nix b/pkgs/development/python-modules/guestfs/default.nix
index 23a2545525a..0f1d2ddf05c 100644
--- a/pkgs/development/python-modules/guestfs/default.nix
+++ b/pkgs/development/python-modules/guestfs/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchurl, libguestfs, qemu }:
+{ lib, buildPythonPackage, fetchurl, libguestfs, qemu }:
 
 buildPythonPackage rec {
   pname = "guestfs";
diff --git a/pkgs/development/python-modules/gunicorn/19.nix b/pkgs/development/python-modules/gunicorn/19.nix
index c1091fa980c..7d43ce95a7e 100644
--- a/pkgs/development/python-modules/gunicorn/19.nix
+++ b/pkgs/development/python-modules/gunicorn/19.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , coverage
 , mock
 , pytest
diff --git a/pkgs/development/python-modules/gunicorn/default.nix b/pkgs/development/python-modules/gunicorn/default.nix
index 983335f4395..3f3eceee378 100644
--- a/pkgs/development/python-modules/gunicorn/default.nix
+++ b/pkgs/development/python-modules/gunicorn/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, isPy27
+{ lib, buildPythonPackage, fetchPypi, isPy27
 , coverage
 , mock
 , pytest
diff --git a/pkgs/development/python-modules/guzzle_sphinx_theme/default.nix b/pkgs/development/python-modules/guzzle_sphinx_theme/default.nix
index f70625b86fe..6f765bd98d6 100644
--- a/pkgs/development/python-modules/guzzle_sphinx_theme/default.nix
+++ b/pkgs/development/python-modules/guzzle_sphinx_theme/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, sphinx, fetchPypi }:
+{ lib, buildPythonPackage, sphinx, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "guzzle_sphinx_theme";
diff --git a/pkgs/development/python-modules/h2/default.nix b/pkgs/development/python-modules/h2/default.nix
index 6dad775732c..ba681658e9a 100644
--- a/pkgs/development/python-modules/h2/default.nix
+++ b/pkgs/development/python-modules/h2/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , enum34, hpack, hyperframe, pytestCheckHook, hypothesis }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/ha-ffmpeg/default.nix b/pkgs/development/python-modules/ha-ffmpeg/default.nix
index 653c4483ce8..84810fd2b53 100644
--- a/pkgs/development/python-modules/ha-ffmpeg/default.nix
+++ b/pkgs/development/python-modules/ha-ffmpeg/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, isPy3k
+{ lib, buildPythonPackage, fetchPypi, isPy3k
 , ffmpeg_3, async-timeout }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/handout/default.nix b/pkgs/development/python-modules/handout/default.nix
index b2b7b4b3d14..316c9a6edca 100644
--- a/pkgs/development/python-modules/handout/default.nix
+++ b/pkgs/development/python-modules/handout/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , imageio, imageio-ffmpeg }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/hawkauthlib/default.nix b/pkgs/development/python-modules/hawkauthlib/default.nix
index a0b7d50b560..7afb4eefa06 100644
--- a/pkgs/development/python-modules/hawkauthlib/default.nix
+++ b/pkgs/development/python-modules/hawkauthlib/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 , requests
diff --git a/pkgs/development/python-modules/hbmqtt/default.nix b/pkgs/development/python-modules/hbmqtt/default.nix
index 003805f939c..c457da91886 100644
--- a/pkgs/development/python-modules/hbmqtt/default.nix
+++ b/pkgs/development/python-modules/hbmqtt/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, isPy3k, pythonAtLeast, setuptools
+{ lib, buildPythonPackage, fetchPypi, isPy3k, pythonAtLeast, setuptools
 , transitions, websockets, passlib, docopt, pyyaml, nose }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/hcs_utils/default.nix b/pkgs/development/python-modules/hcs_utils/default.nix
index 56e9811396e..5dd94e5de2e 100644
--- a/pkgs/development/python-modules/hcs_utils/default.nix
+++ b/pkgs/development/python-modules/hcs_utils/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, pythonOlder, buildPythonPackage, fetchPypi, six, glibcLocales, pytest }:
+{ lib, pythonOlder, buildPythonPackage, fetchPypi, six, glibcLocales, pytest }:
 
 buildPythonPackage rec {
   pname = "hcs_utils";
diff --git a/pkgs/development/python-modules/hdmedians/default.nix b/pkgs/development/python-modules/hdmedians/default.nix
index 3b65e10bfce..f1b0d13e56e 100644
--- a/pkgs/development/python-modules/hdmedians/default.nix
+++ b/pkgs/development/python-modules/hdmedians/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , nose
diff --git a/pkgs/development/python-modules/heapdict/default.nix b/pkgs/development/python-modules/heapdict/default.nix
index 4cd695925f2..61cbe39a256 100644
--- a/pkgs/development/python-modules/heapdict/default.nix
+++ b/pkgs/development/python-modules/heapdict/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, isPy3k }:
+{ lib, buildPythonPackage, fetchPypi, isPy3k }:
 
 buildPythonPackage rec {
   pname = "HeapDict";
diff --git a/pkgs/development/python-modules/helper/default.nix b/pkgs/development/python-modules/helper/default.nix
index 4c7ff0c3878..8560364d4f4 100644
--- a/pkgs/development/python-modules/helper/default.nix
+++ b/pkgs/development/python-modules/helper/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, pyyaml, mock }:
+{ lib, buildPythonPackage, fetchPypi, pyyaml, mock }:
 
 buildPythonPackage rec {
   pname = "helper";
diff --git a/pkgs/development/python-modules/hetzner/default.nix b/pkgs/development/python-modules/hetzner/default.nix
index 3b938dfc237..9b89567d8ef 100644
--- a/pkgs/development/python-modules/hetzner/default.nix
+++ b/pkgs/development/python-modules/hetzner/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 }:
diff --git a/pkgs/development/python-modules/heudiconv/default.nix b/pkgs/development/python-modules/heudiconv/default.nix
index ce291818824..4e65f5b9172 100644
--- a/pkgs/development/python-modules/heudiconv/default.nix
+++ b/pkgs/development/python-modules/heudiconv/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy27
diff --git a/pkgs/development/python-modules/hglib/default.nix b/pkgs/development/python-modules/hglib/default.nix
index afac7983584..a6ed6b935ad 100644
--- a/pkgs/development/python-modules/hglib/default.nix
+++ b/pkgs/development/python-modules/hglib/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, fetchpatch, substituteAll, python, nose, mercurial }:
+{ lib, buildPythonPackage, fetchPypi, fetchpatch, substituteAll, python, nose, mercurial }:
 
 buildPythonPackage rec {
   pname = "python-hglib";
diff --git a/pkgs/development/python-modules/hgsvn/default.nix b/pkgs/development/python-modules/hgsvn/default.nix
index 2ee6024cd47..b8b6d43b548 100644
--- a/pkgs/development/python-modules/hgsvn/default.nix
+++ b/pkgs/development/python-modules/hgsvn/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , nose
diff --git a/pkgs/development/python-modules/hieroglyph/default.nix b/pkgs/development/python-modules/hieroglyph/default.nix
index 418059c5165..d7fa9af5efa 100644
--- a/pkgs/development/python-modules/hieroglyph/default.nix
+++ b/pkgs/development/python-modules/hieroglyph/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage, isPy27, sphinx }:
+{ lib, fetchPypi, buildPythonPackage, isPy27, sphinx }:
 
 buildPythonPackage rec {
   pname = "hieroglyph";
diff --git a/pkgs/development/python-modules/hiredis/default.nix b/pkgs/development/python-modules/hiredis/default.nix
index e9d5677f8be..ef10d195671 100644
--- a/pkgs/development/python-modules/hiredis/default.nix
+++ b/pkgs/development/python-modules/hiredis/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , redis
diff --git a/pkgs/development/python-modules/hiro/default.nix b/pkgs/development/python-modules/hiro/default.nix
index 3ff672a22db..00b56060964 100644
--- a/pkgs/development/python-modules/hiro/default.nix
+++ b/pkgs/development/python-modules/hiro/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, six, mock }:
+{ lib, buildPythonPackage, fetchPypi, six, mock }:
 buildPythonPackage rec {
   pname = "hiro";
   version = "0.5.1";
diff --git a/pkgs/development/python-modules/hjson/default.nix b/pkgs/development/python-modules/hjson/default.nix
index 3393ad18691..096edbe5252 100644
--- a/pkgs/development/python-modules/hjson/default.nix
+++ b/pkgs/development/python-modules/hjson/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 , pythonImportsCheckHook
diff --git a/pkgs/development/python-modules/hkdf/default.nix b/pkgs/development/python-modules/hkdf/default.nix
index 966ce7001fb..43e7a8f4ce3 100644
--- a/pkgs/development/python-modules/hkdf/default.nix
+++ b/pkgs/development/python-modules/hkdf/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , nose
diff --git a/pkgs/development/python-modules/hocr-tools/default.nix b/pkgs/development/python-modules/hocr-tools/default.nix
index 79a2e83508a..cfbf63a5869 100644
--- a/pkgs/development/python-modules/hocr-tools/default.nix
+++ b/pkgs/development/python-modules/hocr-tools/default.nix
@@ -3,7 +3,7 @@
 , lxml
 , pillow
 , reportlab
-, lib, stdenv
+, lib
 }:
 buildPythonPackage rec {
   pname = "hocr-tools";
diff --git a/pkgs/development/python-modules/holidays/default.nix b/pkgs/development/python-modules/holidays/default.nix
index b5e0062d115..789dc57a571 100644
--- a/pkgs/development/python-modules/holidays/default.nix
+++ b/pkgs/development/python-modules/holidays/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , convertdate
diff --git a/pkgs/development/python-modules/hpack/default.nix b/pkgs/development/python-modules/hpack/default.nix
index 9b6f724cd31..a5140a216cf 100644
--- a/pkgs/development/python-modules/hpack/default.nix
+++ b/pkgs/development/python-modules/hpack/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/hsaudiotag/default.nix b/pkgs/development/python-modules/hsaudiotag/default.nix
index fba71dc3f10..d38ceec7e13 100644
--- a/pkgs/development/python-modules/hsaudiotag/default.nix
+++ b/pkgs/development/python-modules/hsaudiotag/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy3k
diff --git a/pkgs/development/python-modules/hsaudiotag3k/default.nix b/pkgs/development/python-modules/hsaudiotag3k/default.nix
index 52919e48983..66ea895960c 100644
--- a/pkgs/development/python-modules/hsaudiotag3k/default.nix
+++ b/pkgs/development/python-modules/hsaudiotag3k/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy3k
diff --git a/pkgs/development/python-modules/html2text/2018.nix b/pkgs/development/python-modules/html2text/2018.nix
index 73540359ee1..06d0c14c7e4 100644
--- a/pkgs/development/python-modules/html2text/2018.nix
+++ b/pkgs/development/python-modules/html2text/2018.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/html5-parser/default.nix b/pkgs/development/python-modules/html5-parser/default.nix
index 0ceeda04582..d20f0a9abfd 100644
--- a/pkgs/development/python-modules/html5-parser/default.nix
+++ b/pkgs/development/python-modules/html5-parser/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, pkgs, pkg-config, chardet, lxml }:
+{ lib, buildPythonPackage, fetchPypi, pkgs, pkg-config, chardet, lxml }:
 
 buildPythonPackage rec {
   pname = "html5-parser";
diff --git a/pkgs/development/python-modules/htmllaundry/default.nix b/pkgs/development/python-modules/htmllaundry/default.nix
index ef660fc0b92..e844c99693a 100644
--- a/pkgs/development/python-modules/htmllaundry/default.nix
+++ b/pkgs/development/python-modules/htmllaundry/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi, nose
 , six
diff --git a/pkgs/development/python-modules/httmock/default.nix b/pkgs/development/python-modules/httmock/default.nix
index 117c7f5e132..cbf6b95ccd3 100644
--- a/pkgs/development/python-modules/httmock/default.nix
+++ b/pkgs/development/python-modules/httmock/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub, requests }:
+{ lib, buildPythonPackage, fetchFromGitHub, requests }:
 
 buildPythonPackage rec {
   pname   = "httmock";
diff --git a/pkgs/development/python-modules/http_signature/default.nix b/pkgs/development/python-modules/http_signature/default.nix
index 145eea751b9..9169f1e4126 100644
--- a/pkgs/development/python-modules/http_signature/default.nix
+++ b/pkgs/development/python-modules/http_signature/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy3k
diff --git a/pkgs/development/python-modules/httpauth/default.nix b/pkgs/development/python-modules/httpauth/default.nix
index b7867e22f17..a7d4240db14 100644
--- a/pkgs/development/python-modules/httpauth/default.nix
+++ b/pkgs/development/python-modules/httpauth/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/httpbin/default.nix b/pkgs/development/python-modules/httpbin/default.nix
index cbaf89c3ca6..2e711141fcb 100644
--- a/pkgs/development/python-modules/httpbin/default.nix
+++ b/pkgs/development/python-modules/httpbin/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , fetchpatch
diff --git a/pkgs/development/python-modules/humanize/default.nix b/pkgs/development/python-modules/humanize/default.nix
index 09e94f6275d..b6f78e5cf8f 100644
--- a/pkgs/development/python-modules/humanize/default.nix
+++ b/pkgs/development/python-modules/humanize/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy27
diff --git a/pkgs/development/python-modules/hyperframe/default.nix b/pkgs/development/python-modules/hyperframe/default.nix
index a74198f3832..6cdee9948b9 100644
--- a/pkgs/development/python-modules/hyperframe/default.nix
+++ b/pkgs/development/python-modules/hyperframe/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, pytestCheckHook }:
+{ lib, buildPythonPackage, fetchPypi, pytestCheckHook }:
 
 buildPythonPackage rec {
   pname = "hyperframe";
diff --git a/pkgs/development/python-modules/hyperopt/default.nix b/pkgs/development/python-modules/hyperopt/default.nix
index ba4aeef402e..d407ff95a01 100644
--- a/pkgs/development/python-modules/hyperopt/default.nix
+++ b/pkgs/development/python-modules/hyperopt/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage
+{ lib, fetchPypi, buildPythonPackage
 , cloudpickle, numpy, future, networkx
 , six, tqdm, scipy, pymongo
 }:
diff --git a/pkgs/development/python-modules/i3-py/default.nix b/pkgs/development/python-modules/i3-py/default.nix
index 4dea7526b7e..312c1bb45c7 100644
--- a/pkgs/development/python-modules/i3-py/default.nix
+++ b/pkgs/development/python-modules/i3-py/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/i3ipc/default.nix b/pkgs/development/python-modules/i3ipc/default.nix
index c27d4135411..37d5ccd8786 100644
--- a/pkgs/development/python-modules/i3ipc/default.nix
+++ b/pkgs/development/python-modules/i3ipc/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub
+{ lib, buildPythonPackage, fetchFromGitHub
 , xorgserver, pytest, pytest-xvfb, i3, python, xlib, xdpyinfo
 , makeFontsConf, coreutils
 }:
diff --git a/pkgs/development/python-modules/icalendar/default.nix b/pkgs/development/python-modules/icalendar/default.nix
index 4499d5d62f4..8e75a945d10 100644
--- a/pkgs/development/python-modules/icalendar/default.nix
+++ b/pkgs/development/python-modules/icalendar/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , setuptools
diff --git a/pkgs/development/python-modules/ics/default.nix b/pkgs/development/python-modules/ics/default.nix
index c186020fee1..011909d6b80 100644
--- a/pkgs/development/python-modules/ics/default.nix
+++ b/pkgs/development/python-modules/ics/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub, pythonOlder
+{ lib, buildPythonPackage, fetchFromGitHub, pythonOlder
 , tatsu, arrow
 , pytestCheckHook, pytest-flakes
 }:
diff --git a/pkgs/development/python-modules/ifaddr/default.nix b/pkgs/development/python-modules/ifaddr/default.nix
index 47997dbdc26..35bafd67fa9 100644
--- a/pkgs/development/python-modules/ifaddr/default.nix
+++ b/pkgs/development/python-modules/ifaddr/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , ipaddress
diff --git a/pkgs/development/python-modules/ifconfig-parser/default.nix b/pkgs/development/python-modules/ifconfig-parser/default.nix
index bdfd3767f8c..be4e2026bf1 100644
--- a/pkgs/development/python-modules/ifconfig-parser/default.nix
+++ b/pkgs/development/python-modules/ifconfig-parser/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub }:
+{ lib, buildPythonPackage, fetchFromGitHub }:
 
 buildPythonPackage rec {
   pname = "ifconfig-parser";
diff --git a/pkgs/development/python-modules/ijson/default.nix b/pkgs/development/python-modules/ijson/default.nix
index a82a20ca7c8..8ccc7eb4e0c 100644
--- a/pkgs/development/python-modules/ijson/default.nix
+++ b/pkgs/development/python-modules/ijson/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "ijson";
diff --git a/pkgs/development/python-modules/image-match/default.nix b/pkgs/development/python-modules/image-match/default.nix
index 5c1953d6ac3..7464f3c8997 100644
--- a/pkgs/development/python-modules/image-match/default.nix
+++ b/pkgs/development/python-modules/image-match/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub, pytestrunner, scikitimage }:
+{ lib, buildPythonPackage, fetchFromGitHub, pytestrunner, scikitimage }:
 
 buildPythonPackage {
   pname = "image-match";
diff --git a/pkgs/development/python-modules/imagecorruptions/default.nix b/pkgs/development/python-modules/imagecorruptions/default.nix
index 65c1cfd020a..8d2b7fd8da8 100644
--- a/pkgs/development/python-modules/imagecorruptions/default.nix
+++ b/pkgs/development/python-modules/imagecorruptions/default.nix
@@ -2,7 +2,7 @@
 , fetchPypi
 , numpy
 , scikitimage
-, lib, stdenv
+, lib
 , opencv3
 }:
 
diff --git a/pkgs/development/python-modules/imageio/default.nix b/pkgs/development/python-modules/imageio/default.nix
index 71f7eae9c32..67920dc7b7d 100644
--- a/pkgs/development/python-modules/imageio/default.nix
+++ b/pkgs/development/python-modules/imageio/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , isPy27
 , pathlib
diff --git a/pkgs/development/python-modules/imagesize/default.nix b/pkgs/development/python-modules/imagesize/default.nix
index cd48f54ee8f..42cf6b50764 100644
--- a/pkgs/development/python-modules/imagesize/default.nix
+++ b/pkgs/development/python-modules/imagesize/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/imapclient/default.nix b/pkgs/development/python-modules/imapclient/default.nix
index c091f53b8d4..27667f860ff 100644
--- a/pkgs/development/python-modules/imapclient/default.nix
+++ b/pkgs/development/python-modules/imapclient/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 , mock
diff --git a/pkgs/development/python-modules/imbalanced-learn/0.4.nix b/pkgs/development/python-modules/imbalanced-learn/0.4.nix
index fe21096d635..96ba16b1cd1 100644
--- a/pkgs/development/python-modules/imbalanced-learn/0.4.nix
+++ b/pkgs/development/python-modules/imbalanced-learn/0.4.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, scikitlearn, pandas, nose, pytest }:
+{ lib, buildPythonPackage, fetchPypi, scikitlearn, pandas, nose, pytest }:
 
 buildPythonPackage rec {
   pname = "imbalanced-learn";
diff --git a/pkgs/development/python-modules/imbalanced-learn/default.nix b/pkgs/development/python-modules/imbalanced-learn/default.nix
index 4253ed30e41..f5418b89e80 100644
--- a/pkgs/development/python-modules/imbalanced-learn/default.nix
+++ b/pkgs/development/python-modules/imbalanced-learn/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, isPy27
+{ lib, buildPythonPackage, fetchPypi, isPy27
 , pandas
 , pytestCheckHook
 , scikitlearn
diff --git a/pkgs/development/python-modules/imgaug/default.nix b/pkgs/development/python-modules/imgaug/default.nix
index 9ca8531dbbc..343c7869a6c 100644
--- a/pkgs/development/python-modules/imgaug/default.nix
+++ b/pkgs/development/python-modules/imgaug/default.nix
@@ -9,7 +9,7 @@
 , scipy
 , shapely
 , six
-, lib, stdenv
+, lib
 }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/imgsize/default.nix b/pkgs/development/python-modules/imgsize/default.nix
index d1a69c043d0..a8f50cd8f32 100644
--- a/pkgs/development/python-modules/imgsize/default.nix
+++ b/pkgs/development/python-modules/imgsize/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 }:
diff --git a/pkgs/development/python-modules/importmagic/default.nix b/pkgs/development/python-modules/importmagic/default.nix
index 3a6a3c9ef8d..54308d632b2 100644
--- a/pkgs/development/python-modules/importmagic/default.nix
+++ b/pkgs/development/python-modules/importmagic/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , six
diff --git a/pkgs/development/python-modules/imread/default.nix b/pkgs/development/python-modules/imread/default.nix
index 65ae47ed87b..3d09e6a4397 100644
--- a/pkgs/development/python-modules/imread/default.nix
+++ b/pkgs/development/python-modules/imread/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , nose
diff --git a/pkgs/development/python-modules/imutils/default.nix b/pkgs/development/python-modules/imutils/default.nix
index 33c2ae0001c..f402f913f38 100644
--- a/pkgs/development/python-modules/imutils/default.nix
+++ b/pkgs/development/python-modules/imutils/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , opencv3
diff --git a/pkgs/development/python-modules/influxdb/default.nix b/pkgs/development/python-modules/influxdb/default.nix
index 2d0fd5a93ad..69fe83b8779 100644
--- a/pkgs/development/python-modules/influxdb/default.nix
+++ b/pkgs/development/python-modules/influxdb/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , requests
diff --git a/pkgs/development/python-modules/influxgraph/default.nix b/pkgs/development/python-modules/influxgraph/default.nix
index 32374453375..c8403cf6446 100644
--- a/pkgs/development/python-modules/influxgraph/default.nix
+++ b/pkgs/development/python-modules/influxgraph/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, isPy3k
+{ lib, buildPythonPackage, fetchPypi, isPy3k
 , influxdb, graphite_api, memcached
 }:
 
diff --git a/pkgs/development/python-modules/infoqscraper/default.nix b/pkgs/development/python-modules/infoqscraper/default.nix
index 4baa891a779..b250dfc6c7f 100644
--- a/pkgs/development/python-modules/infoqscraper/default.nix
+++ b/pkgs/development/python-modules/infoqscraper/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , html5lib
 , six
diff --git a/pkgs/development/python-modules/inifile/default.nix b/pkgs/development/python-modules/inifile/default.nix
index 9bd24a4d788..c94c12ab0a8 100644
--- a/pkgs/development/python-modules/inifile/default.nix
+++ b/pkgs/development/python-modules/inifile/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/iniparse/default.nix b/pkgs/development/python-modules/iniparse/default.nix
index c515b7865b1..e4473c0bd1c 100644
--- a/pkgs/development/python-modules/iniparse/default.nix
+++ b/pkgs/development/python-modules/iniparse/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , python
diff --git a/pkgs/development/python-modules/inquirer/default.nix b/pkgs/development/python-modules/inquirer/default.nix
index c434a3f52bc..e55fd8f39d5 100644
--- a/pkgs/development/python-modules/inquirer/default.nix
+++ b/pkgs/development/python-modules/inquirer/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub, python-editor, readchar, blessed, pytest, pytestcov, pexpect, pytest-mock }:
+{ lib, buildPythonPackage, fetchFromGitHub, python-editor, readchar, blessed, pytest, pytestcov, pexpect, pytest-mock }:
 
 buildPythonPackage rec {
   pname = "inquirer";
diff --git a/pkgs/development/python-modules/interruptingcow/default.nix b/pkgs/development/python-modules/interruptingcow/default.nix
index b4e1dfaff18..62e021afdbb 100644
--- a/pkgs/development/python-modules/interruptingcow/default.nix
+++ b/pkgs/development/python-modules/interruptingcow/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 buildPythonPackage rec {
   pname = "interruptingcow";
   version = "0.8";
diff --git a/pkgs/development/python-modules/intervaltree/default.nix b/pkgs/development/python-modules/intervaltree/default.nix
index 27a5fa3650e..dca73a93e8f 100644
--- a/pkgs/development/python-modules/intervaltree/default.nix
+++ b/pkgs/development/python-modules/intervaltree/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , python, pytest, sortedcontainers }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/ipaddr/default.nix b/pkgs/development/python-modules/ipaddr/default.nix
index 427681fedb8..b29ee917928 100644
--- a/pkgs/development/python-modules/ipaddr/default.nix
+++ b/pkgs/development/python-modules/ipaddr/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy3k
diff --git a/pkgs/development/python-modules/ipaddress/default.nix b/pkgs/development/python-modules/ipaddress/default.nix
index f2e479aff96..06211470daa 100644
--- a/pkgs/development/python-modules/ipaddress/default.nix
+++ b/pkgs/development/python-modules/ipaddress/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pythonAtLeast
diff --git a/pkgs/development/python-modules/ipdb/default.nix b/pkgs/development/python-modules/ipdb/default.nix
index b21907f75ff..7b8c877371c 100644
--- a/pkgs/development/python-modules/ipdb/default.nix
+++ b/pkgs/development/python-modules/ipdb/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , ipython
diff --git a/pkgs/development/python-modules/ipdbplugin/default.nix b/pkgs/development/python-modules/ipdbplugin/default.nix
index 057d82cbebc..9788fd8a544 100644
--- a/pkgs/development/python-modules/ipdbplugin/default.nix
+++ b/pkgs/development/python-modules/ipdbplugin/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , nose
diff --git a/pkgs/development/python-modules/ipfsapi/default.nix b/pkgs/development/python-modules/ipfsapi/default.nix
index 3deb0c6cb80..c97eafb6054 100644
--- a/pkgs/development/python-modules/ipfsapi/default.nix
+++ b/pkgs/development/python-modules/ipfsapi/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 , isPy27
diff --git a/pkgs/development/python-modules/iptools/default.nix b/pkgs/development/python-modules/iptools/default.nix
index 431c05bb388..3f2b854b6e7 100644
--- a/pkgs/development/python-modules/iptools/default.nix
+++ b/pkgs/development/python-modules/iptools/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , nose
diff --git a/pkgs/development/python-modules/iso3166/default.nix b/pkgs/development/python-modules/iso3166/default.nix
index acf6d3c9331..61ec91075b5 100644
--- a/pkgs/development/python-modules/iso3166/default.nix
+++ b/pkgs/development/python-modules/iso3166/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, buildPythonPackage, pytest }:
+{ lib, fetchFromGitHub, buildPythonPackage, pytest }:
 
 buildPythonPackage {
   pname = "iso3166";
diff --git a/pkgs/development/python-modules/isodate/default.nix b/pkgs/development/python-modules/isodate/default.nix
index d2098a83c95..19a643d216a 100644
--- a/pkgs/development/python-modules/isodate/default.nix
+++ b/pkgs/development/python-modules/isodate/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , python
diff --git a/pkgs/development/python-modules/itsdangerous/default.nix b/pkgs/development/python-modules/itsdangerous/default.nix
index e89786d4e18..d1669a1ed5b 100644
--- a/pkgs/development/python-modules/itsdangerous/default.nix
+++ b/pkgs/development/python-modules/itsdangerous/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/itypes/default.nix b/pkgs/development/python-modules/itypes/default.nix
index 417d1a20b3b..1b684547240 100644
--- a/pkgs/development/python-modules/itypes/default.nix
+++ b/pkgs/development/python-modules/itypes/default.nix
@@ -1,5 +1,5 @@
 {
-  lib, stdenv,
+  lib,
   fetchFromGitHub,
   buildPythonPackage,
   pytest,
diff --git a/pkgs/development/python-modules/j2cli/default.nix b/pkgs/development/python-modules/j2cli/default.nix
index 14cf18ae694..d6efe84edfd 100644
--- a/pkgs/development/python-modules/j2cli/default.nix
+++ b/pkgs/development/python-modules/j2cli/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , jinja2
diff --git a/pkgs/development/python-modules/jabberbot/default.nix b/pkgs/development/python-modules/jabberbot/default.nix
index 4c625d94485..d00ccd06c8d 100644
--- a/pkgs/development/python-modules/jabberbot/default.nix
+++ b/pkgs/development/python-modules/jabberbot/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, isPy3k, fetchPypi, xmpppy }:
+{ lib, buildPythonPackage, isPy3k, fetchPypi, xmpppy }:
 
 buildPythonPackage rec {
   pname = "jabberbot";
diff --git a/pkgs/development/python-modules/jc/default.nix b/pkgs/development/python-modules/jc/default.nix
index 6f120fa6ea2..b4590ed28d3 100644
--- a/pkgs/development/python-modules/jc/default.nix
+++ b/pkgs/development/python-modules/jc/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 , ruamel_yaml
diff --git a/pkgs/development/python-modules/jdatetime/default.nix b/pkgs/development/python-modules/jdatetime/default.nix
index d4aa49c3ca3..90f7c310faa 100644
--- a/pkgs/development/python-modules/jdatetime/default.nix
+++ b/pkgs/development/python-modules/jdatetime/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, six }:
+{ lib, buildPythonPackage, fetchPypi, six }:
 
 buildPythonPackage rec {
   pname = "jdatetime";
diff --git a/pkgs/development/python-modules/jedi/default.nix b/pkgs/development/python-modules/jedi/default.nix
index 6e833a77460..305b9f6c6b6 100644
--- a/pkgs/development/python-modules/jedi/default.nix
+++ b/pkgs/development/python-modules/jedi/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub, fetchPypi, pytest, glibcLocales, tox, pytestcov, parso }:
+{ lib, buildPythonPackage, fetchFromGitHub, fetchPypi, pytest, glibcLocales, tox, pytestcov, parso }:
 
 buildPythonPackage rec {
   pname = "jedi";
diff --git a/pkgs/development/python-modules/jinja2_pluralize/default.nix b/pkgs/development/python-modules/jinja2_pluralize/default.nix
index 0a6d0c365a0..db196403822 100644
--- a/pkgs/development/python-modules/jinja2_pluralize/default.nix
+++ b/pkgs/development/python-modules/jinja2_pluralize/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, jinja2, inflect }:
+{ lib, buildPythonPackage, fetchPypi, jinja2, inflect }:
 
 buildPythonPackage rec {
   pname = "jinja2_pluralize";
diff --git a/pkgs/development/python-modules/jinja2_time/default.nix b/pkgs/development/python-modules/jinja2_time/default.nix
index 7887fe96f75..4268413fd3f 100644
--- a/pkgs/development/python-modules/jinja2_time/default.nix
+++ b/pkgs/development/python-modules/jinja2_time/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , arrow
diff --git a/pkgs/development/python-modules/jmespath/default.nix b/pkgs/development/python-modules/jmespath/default.nix
index 3b31700de0e..3f74ae8d810 100644
--- a/pkgs/development/python-modules/jmespath/default.nix
+++ b/pkgs/development/python-modules/jmespath/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , ply
diff --git a/pkgs/development/python-modules/jpylyzer/default.nix b/pkgs/development/python-modules/jpylyzer/default.nix
index c5c9cdf1505..6f9ceb96e3f 100644
--- a/pkgs/development/python-modules/jpylyzer/default.nix
+++ b/pkgs/development/python-modules/jpylyzer/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , fetchFromGitHub
 , buildPythonPackage
 , six
diff --git a/pkgs/development/python-modules/jsonfield/default.nix b/pkgs/development/python-modules/jsonfield/default.nix
index 07ee609d653..6b7faf9a312 100644
--- a/pkgs/development/python-modules/jsonfield/default.nix
+++ b/pkgs/development/python-modules/jsonfield/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage, django, pytestCheckHook, pytest-django }:
+{ lib, fetchPypi, buildPythonPackage, django, pytestCheckHook, pytest-django }:
 
 buildPythonPackage rec {
   pname = "jsonfield";
diff --git a/pkgs/development/python-modules/jsonpath_rw/default.nix b/pkgs/development/python-modules/jsonpath_rw/default.nix
index 81a6eb3fb27..d2b177c742a 100644
--- a/pkgs/development/python-modules/jsonpath_rw/default.nix
+++ b/pkgs/development/python-modules/jsonpath_rw/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPyPy
diff --git a/pkgs/development/python-modules/jsonref/default.nix b/pkgs/development/python-modules/jsonref/default.nix
index b901d811a23..3154f63f318 100644
--- a/pkgs/development/python-modules/jsonref/default.nix
+++ b/pkgs/development/python-modules/jsonref/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , pytest, mock }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/jsonrpc-async/default.nix b/pkgs/development/python-modules/jsonrpc-async/default.nix
index 0b77db5df4e..00f0d748bbb 100644
--- a/pkgs/development/python-modules/jsonrpc-async/default.nix
+++ b/pkgs/development/python-modules/jsonrpc-async/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , aiohttp, jsonrpc-base }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/jsonrpc-base/default.nix b/pkgs/development/python-modules/jsonrpc-base/default.nix
index cc4bd1b2f68..db47a2240fb 100644
--- a/pkgs/development/python-modules/jsonrpc-base/default.nix
+++ b/pkgs/development/python-modules/jsonrpc-base/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "jsonrpc-base";
diff --git a/pkgs/development/python-modules/jsonrpc-websocket/default.nix b/pkgs/development/python-modules/jsonrpc-websocket/default.nix
index d14d382f013..bf8960ad27d 100644
--- a/pkgs/development/python-modules/jsonrpc-websocket/default.nix
+++ b/pkgs/development/python-modules/jsonrpc-websocket/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , aiohttp, jsonrpc-base, pep8
 , pytestCheckHook
 , pytest-asyncio
diff --git a/pkgs/development/python-modules/jsonwatch/default.nix b/pkgs/development/python-modules/jsonwatch/default.nix
index feced944225..7b08572d231 100644
--- a/pkgs/development/python-modules/jsonwatch/default.nix
+++ b/pkgs/development/python-modules/jsonwatch/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchurl
 , six
diff --git a/pkgs/development/python-modules/jug/default.nix b/pkgs/development/python-modules/jug/default.nix
index eff6accaa02..7646c007818 100644
--- a/pkgs/development/python-modules/jug/default.nix
+++ b/pkgs/development/python-modules/jug/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, fetchpatch
+{ lib, buildPythonPackage, fetchPypi, fetchpatch
 , nose, numpy
 , bottle, pyyaml, redis, six
 , zlib
diff --git a/pkgs/development/python-modules/junos-eznc/default.nix b/pkgs/development/python-modules/junos-eznc/default.nix
index d9234d836b0..60ec37dbde9 100644
--- a/pkgs/development/python-modules/junos-eznc/default.nix
+++ b/pkgs/development/python-modules/junos-eznc/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , six
diff --git a/pkgs/development/python-modules/jupyter-repo2docker/default.nix b/pkgs/development/python-modules/jupyter-repo2docker/default.nix
index f01605513cb..5d8060d1944 100644
--- a/pkgs/development/python-modules/jupyter-repo2docker/default.nix
+++ b/pkgs/development/python-modules/jupyter-repo2docker/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, pythonAtLeast
+{ lib, buildPythonPackage, fetchPypi, pythonAtLeast
 , docker
 , escapism
 , jinja2
diff --git a/pkgs/development/python-modules/jupyter-telemetry/default.nix b/pkgs/development/python-modules/jupyter-telemetry/default.nix
index 0f0c0d346e6..9dddd8ec568 100644
--- a/pkgs/development/python-modules/jupyter-telemetry/default.nix
+++ b/pkgs/development/python-modules/jupyter-telemetry/default.nix
@@ -1,5 +1,4 @@
-{ stdenv
-, lib
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pythonOlder
diff --git a/pkgs/development/python-modules/jupyter/default.nix b/pkgs/development/python-modules/jupyter/default.nix
index 03d28bbf55d..818623c2513 100644
--- a/pkgs/development/python-modules/jupyter/default.nix
+++ b/pkgs/development/python-modules/jupyter/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , notebook
diff --git a/pkgs/development/python-modules/jupyterlab_server/default.nix b/pkgs/development/python-modules/jupyterlab_server/default.nix
index bfbd1cc89e0..3d9b5b9f831 100644
--- a/pkgs/development/python-modules/jupyterlab_server/default.nix
+++ b/pkgs/development/python-modules/jupyterlab_server/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , notebook
diff --git a/pkgs/development/python-modules/kaa-base/default.nix b/pkgs/development/python-modules/kaa-base/default.nix
index 24a02f7f696..5b789f5eda8 100644
--- a/pkgs/development/python-modules/kaa-base/default.nix
+++ b/pkgs/development/python-modules/kaa-base/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPyPy
diff --git a/pkgs/development/python-modules/kaa-metadata/default.nix b/pkgs/development/python-modules/kaa-metadata/default.nix
index 5164004e8ea..5a50d9e9c0a 100644
--- a/pkgs/development/python-modules/kaa-metadata/default.nix
+++ b/pkgs/development/python-modules/kaa-metadata/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , kaa-base
diff --git a/pkgs/development/python-modules/kafka-python/default.nix b/pkgs/development/python-modules/kafka-python/default.nix
index b147b30c2ce..d8f37f563d4 100644
--- a/pkgs/development/python-modules/kafka-python/default.nix
+++ b/pkgs/development/python-modules/kafka-python/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, pytest, six, mock }:
+{ lib, buildPythonPackage, fetchPypi, pytest, six, mock }:
 
 buildPythonPackage rec {
   version = "2.0.2";
diff --git a/pkgs/development/python-modules/kaitaistruct/default.nix b/pkgs/development/python-modules/kaitaistruct/default.nix
index 866042b6942..1050ae88e43 100644
--- a/pkgs/development/python-modules/kaitaistruct/default.nix
+++ b/pkgs/development/python-modules/kaitaistruct/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "kaitaistruct";
diff --git a/pkgs/development/python-modules/kajiki/default.nix b/pkgs/development/python-modules/kajiki/default.nix
index 2a45404919c..471ee4416b6 100644
--- a/pkgs/development/python-modules/kajiki/default.nix
+++ b/pkgs/development/python-modules/kajiki/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , Babel
diff --git a/pkgs/development/python-modules/kaptan/default.nix b/pkgs/development/python-modules/kaptan/default.nix
index dea22059f09..c5f00393839 100644
--- a/pkgs/development/python-modules/kaptan/default.nix
+++ b/pkgs/development/python-modules/kaptan/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pyyaml
diff --git a/pkgs/development/python-modules/kazoo/default.nix b/pkgs/development/python-modules/kazoo/default.nix
index d8743776578..31b65023371 100644
--- a/pkgs/development/python-modules/kazoo/default.nix
+++ b/pkgs/development/python-modules/kazoo/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , six
diff --git a/pkgs/development/python-modules/keep/default.nix b/pkgs/development/python-modules/keep/default.nix
index 22ae853c043..5a70dcb4676 100644
--- a/pkgs/development/python-modules/keep/default.nix
+++ b/pkgs/development/python-modules/keep/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , PyGithub
diff --git a/pkgs/development/python-modules/keepalive/default.nix b/pkgs/development/python-modules/keepalive/default.nix
index 7a488edf895..b6daec6ca20 100644
--- a/pkgs/development/python-modules/keepalive/default.nix
+++ b/pkgs/development/python-modules/keepalive/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/keepkey/default.nix b/pkgs/development/python-modules/keepkey/default.nix
index 437a0193c61..6b4568cd748 100644
--- a/pkgs/development/python-modules/keepkey/default.nix
+++ b/pkgs/development/python-modules/keepkey/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, buildPythonPackage, pytest
+{ lib, fetchFromGitHub, buildPythonPackage, pytest
 , ecdsa , mnemonic, protobuf, hidapi, trezor }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/keepkey_agent/default.nix b/pkgs/development/python-modules/keepkey_agent/default.nix
index b9189cf4e16..27ef7d8dbf4 100644
--- a/pkgs/development/python-modules/keepkey_agent/default.nix
+++ b/pkgs/development/python-modules/keepkey_agent/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , keepkey
diff --git a/pkgs/development/python-modules/keras/default.nix b/pkgs/development/python-modules/keras/default.nix
index 7274d3d17a6..e90dd1a806a 100644
--- a/pkgs/development/python-modules/keras/default.nix
+++ b/pkgs/development/python-modules/keras/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , pytest, pytestcov, pytest_xdist
 , six, numpy, scipy, pyyaml, h5py
 , keras-applications, keras-preprocessing
diff --git a/pkgs/development/python-modules/kerberos/default.nix b/pkgs/development/python-modules/kerberos/default.nix
index 985339caed5..7a9ce3aab44 100644
--- a/pkgs/development/python-modules/kerberos/default.nix
+++ b/pkgs/development/python-modules/kerberos/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , kerberos
diff --git a/pkgs/development/python-modules/keyrings-alt/default.nix b/pkgs/development/python-modules/keyrings-alt/default.nix
index bc20ff4e374..5b53d201a0b 100644
--- a/pkgs/development/python-modules/keyrings-alt/default.nix
+++ b/pkgs/development/python-modules/keyrings-alt/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, pythonOlder, isPy27, six
+{ lib, buildPythonPackage, fetchPypi, pythonOlder, isPy27, six
 , pytest, backports_unittest-mock, keyring, setuptools_scm, toml
 }:
 
diff --git a/pkgs/development/python-modules/kitchen/default.nix b/pkgs/development/python-modules/kitchen/default.nix
index 1a14b974114..0b6f41d2c19 100644
--- a/pkgs/development/python-modules/kitchen/default.nix
+++ b/pkgs/development/python-modules/kitchen/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 buildPythonPackage rec {
   pname = "kitchen";
   version = "1.2.6";
diff --git a/pkgs/development/python-modules/knack/default.nix b/pkgs/development/python-modules/knack/default.nix
index dd45e967231..c08bdab4cf3 100644
--- a/pkgs/development/python-modules/knack/default.nix
+++ b/pkgs/development/python-modules/knack/default.nix
@@ -1,5 +1,4 @@
-{ stdenv
-, lib
+{ lib
 , buildPythonPackage
 , fetchPypi
 , argcomplete
diff --git a/pkgs/development/python-modules/korean-lunar-calendar/default.nix b/pkgs/development/python-modules/korean-lunar-calendar/default.nix
index 8ad94d955ae..a1b22a727ad 100644
--- a/pkgs/development/python-modules/korean-lunar-calendar/default.nix
+++ b/pkgs/development/python-modules/korean-lunar-calendar/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/kubernetes/default.nix b/pkgs/development/python-modules/kubernetes/default.nix
index 17218078196..f2cb598a6c9 100644
--- a/pkgs/development/python-modules/kubernetes/default.nix
+++ b/pkgs/development/python-modules/kubernetes/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, pythonAtLeast,
+{ lib, buildPythonPackage, fetchPypi, pythonAtLeast,
   ipaddress, websocket_client, urllib3, pyyaml, requests_oauthlib, python-dateutil, google-auth, adal,
   isort, pytest, coverage, mock, sphinx, autopep8, pep8, codecov, recommonmark, nose }:
 
diff --git a/pkgs/development/python-modules/larch/default.nix b/pkgs/development/python-modules/larch/default.nix
index 7708bc0dbc0..630430b8270 100644
--- a/pkgs/development/python-modules/larch/default.nix
+++ b/pkgs/development/python-modules/larch/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchurl
 , sphinx
diff --git a/pkgs/development/python-modules/lasagne/default.nix b/pkgs/development/python-modules/lasagne/default.nix
index 5bddf5cbe6f..5db149708ff 100644
--- a/pkgs/development/python-modules/lasagne/default.nix
+++ b/pkgs/development/python-modules/lasagne/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , numpy
diff --git a/pkgs/development/python-modules/lazy-object-proxy/default.nix b/pkgs/development/python-modules/lazy-object-proxy/default.nix
index 63784b4005b..82a784cfe3c 100644
--- a/pkgs/development/python-modules/lazy-object-proxy/default.nix
+++ b/pkgs/development/python-modules/lazy-object-proxy/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pytest
diff --git a/pkgs/development/python-modules/lazy_import/default.nix b/pkgs/development/python-modules/lazy_import/default.nix
index 1bc52b3a65c..60eba0577b0 100644
--- a/pkgs/development/python-modules/lazy_import/default.nix
+++ b/pkgs/development/python-modules/lazy_import/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , pytest
 , pytest_xdist
 , six }:
diff --git a/pkgs/development/python-modules/ldap3/default.nix b/pkgs/development/python-modules/ldap3/default.nix
index e1accc4d177..71af0d294a2 100644
--- a/pkgs/development/python-modules/ldap3/default.nix
+++ b/pkgs/development/python-modules/ldap3/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage, pyasn1 }:
+{ lib, fetchPypi, buildPythonPackage, pyasn1 }:
 
 buildPythonPackage rec {
   pname = "ldap3";
diff --git a/pkgs/development/python-modules/le/default.nix b/pkgs/development/python-modules/le/default.nix
index 6415b255c71..d42527ae97a 100644
--- a/pkgs/development/python-modules/le/default.nix
+++ b/pkgs/development/python-modules/le/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchurl
 , isPy3k
diff --git a/pkgs/development/python-modules/leather/default.nix b/pkgs/development/python-modules/leather/default.nix
index 99c1f080a03..197e88e8e8b 100644
--- a/pkgs/development/python-modules/leather/default.nix
+++ b/pkgs/development/python-modules/leather/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage, six }:
+{ lib, fetchPypi, buildPythonPackage, six }:
 
 buildPythonPackage rec {
   pname = "leather";
diff --git a/pkgs/development/python-modules/ledger_agent/default.nix b/pkgs/development/python-modules/ledger_agent/default.nix
index 4fc935799c3..8a0ace12645 100644
--- a/pkgs/development/python-modules/ledger_agent/default.nix
+++ b/pkgs/development/python-modules/ledger_agent/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , ledgerblue
diff --git a/pkgs/development/python-modules/ledgerblue/default.nix b/pkgs/development/python-modules/ledgerblue/default.nix
index f853dfbf01f..fe94753f1a6 100644
--- a/pkgs/development/python-modules/ledgerblue/default.nix
+++ b/pkgs/development/python-modules/ledgerblue/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage, hidapi
+{ lib, fetchPypi, buildPythonPackage, hidapi
 , pycrypto, pillow, protobuf, future, ecpy, python-u2flib-host, pycryptodomex
 , websocket_client
 }:
diff --git a/pkgs/development/python-modules/libagent/default.nix b/pkgs/development/python-modules/libagent/default.nix
index debe88f2f6c..47be977755c 100644
--- a/pkgs/development/python-modules/libagent/default.nix
+++ b/pkgs/development/python-modules/libagent/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, buildPythonPackage, ed25519, ecdsa , semver, mnemonic,
+{ lib, fetchFromGitHub, buildPythonPackage, ed25519, ecdsa , semver, mnemonic,
   unidecode, mock, pytest , backports-shutil-which, ConfigArgParse,
   python-daemon, pymsgbox }:
 
diff --git a/pkgs/development/python-modules/libais/default.nix b/pkgs/development/python-modules/libais/default.nix
index eb1ce861dd2..33710c6682d 100644
--- a/pkgs/development/python-modules/libais/default.nix
+++ b/pkgs/development/python-modules/libais/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi,
+{ lib, buildPythonPackage, fetchPypi,
   six, pytest, pytestrunner, pytestcov, coverage
 }:
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/libarcus/default.nix b/pkgs/development/python-modules/libarcus/default.nix
index 5a5116de547..6e5d8f771e8 100644
--- a/pkgs/development/python-modules/libarcus/default.nix
+++ b/pkgs/development/python-modules/libarcus/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, python, fetchFromGitHub
+{ lib, buildPythonPackage, python, fetchFromGitHub
 , cmake, sip, protobuf, pythonOlder }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/libasyncns/default.nix b/pkgs/development/python-modules/libasyncns/default.nix
index fc45622a671..38ca9b26360 100644
--- a/pkgs/development/python-modules/libasyncns/default.nix
+++ b/pkgs/development/python-modules/libasyncns/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchurl
+{ lib, buildPythonPackage, fetchurl
 , libasyncns, pkg-config }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/libkeepass/default.nix b/pkgs/development/python-modules/libkeepass/default.nix
index cfc687e37c1..aa922db9c10 100644
--- a/pkgs/development/python-modules/libkeepass/default.nix
+++ b/pkgs/development/python-modules/libkeepass/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage
+{ lib, fetchPypi, buildPythonPackage
 , lxml, pycryptodome, colorama }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/liblarch/default.nix b/pkgs/development/python-modules/liblarch/default.nix
index b824dec172e..5ff8d25d54b 100644
--- a/pkgs/development/python-modules/liblarch/default.nix
+++ b/pkgs/development/python-modules/liblarch/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , fetchFromGitHub
 , buildPythonPackage
 , python
diff --git a/pkgs/development/python-modules/libmr/default.nix b/pkgs/development/python-modules/libmr/default.nix
index a0ef924e56e..d775cc7b245 100644
--- a/pkgs/development/python-modules/libmr/default.nix
+++ b/pkgs/development/python-modules/libmr/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, numpy, cython }:
+{ lib, buildPythonPackage, fetchPypi, numpy, cython }:
 
 buildPythonPackage rec {
   pname = "libmr";
diff --git a/pkgs/development/python-modules/librosa/default.nix b/pkgs/development/python-modules/librosa/default.nix
index 777eed4ddb3..ce8f2a73fa7 100644
--- a/pkgs/development/python-modules/librosa/default.nix
+++ b/pkgs/development/python-modules/librosa/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , joblib
diff --git a/pkgs/development/python-modules/libsavitar/default.nix b/pkgs/development/python-modules/libsavitar/default.nix
index 559289987e6..7ef22e3f6ee 100644
--- a/pkgs/development/python-modules/libsavitar/default.nix
+++ b/pkgs/development/python-modules/libsavitar/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, python, pythonOlder, fetchFromGitHub, cmake, sip }:
+{ lib, buildPythonPackage, python, pythonOlder, fetchFromGitHub, cmake, sip }:
 
 buildPythonPackage rec {
   pname = "libsavitar";
diff --git a/pkgs/development/python-modules/libsoundtouch/default.nix b/pkgs/development/python-modules/libsoundtouch/default.nix
index 40f1b2f8e9c..a4f98ffada8 100644
--- a/pkgs/development/python-modules/libsoundtouch/default.nix
+++ b/pkgs/development/python-modules/libsoundtouch/default.nix
@@ -1,6 +1,6 @@
 { buildPythonPackage
 , fetchFromGitHub
-, stdenv
+
 , lib
 , pythonOlder
 , requests
diff --git a/pkgs/development/python-modules/libthumbor/default.nix b/pkgs/development/python-modules/libthumbor/default.nix
index 72e62514a52..c3d8ec9526f 100644
--- a/pkgs/development/python-modules/libthumbor/default.nix
+++ b/pkgs/development/python-modules/libthumbor/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , django
diff --git a/pkgs/development/python-modules/libtmux/default.nix b/pkgs/development/python-modules/libtmux/default.nix
index df9728eb334..e019951f6ff 100644
--- a/pkgs/development/python-modules/libtmux/default.nix
+++ b/pkgs/development/python-modules/libtmux/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage, pytest }:
+{ lib, fetchPypi, buildPythonPackage, pytest }:
 
 buildPythonPackage rec {
   pname = "libtmux";
diff --git a/pkgs/development/python-modules/libversion/default.nix b/pkgs/development/python-modules/libversion/default.nix
index d54a176f686..2edc9211d92 100644
--- a/pkgs/development/python-modules/libversion/default.nix
+++ b/pkgs/development/python-modules/libversion/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, pkg-config, libversion, pythonOlder }:
+{ lib, buildPythonPackage, fetchPypi, pkg-config, libversion, pythonOlder }:
 
 buildPythonPackage rec {
   pname = "libversion";
diff --git a/pkgs/development/python-modules/libvirt/5.9.0.nix b/pkgs/development/python-modules/libvirt/5.9.0.nix
index 1134d4f1c57..bfc6b711ab2 100644
--- a/pkgs/development/python-modules/libvirt/5.9.0.nix
+++ b/pkgs/development/python-modules/libvirt/5.9.0.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchgit, pkg-config, lxml, libvirt, nose }:
+{ lib, buildPythonPackage, fetchgit, pkg-config, lxml, libvirt, nose }:
 
 buildPythonPackage rec {
   pname = "libvirt";
diff --git a/pkgs/development/python-modules/libvirt/default.nix b/pkgs/development/python-modules/libvirt/default.nix
index d29cf5a7a85..ee2d88b4c04 100644
--- a/pkgs/development/python-modules/libvirt/default.nix
+++ b/pkgs/development/python-modules/libvirt/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitLab, pkg-config, lxml, libvirt, nose }:
+{ lib, buildPythonPackage, fetchFromGitLab, pkg-config, lxml, libvirt, nose }:
 
 buildPythonPackage rec {
   pname = "libvirt";
diff --git a/pkgs/development/python-modules/lightblue/default.nix b/pkgs/development/python-modules/lightblue/default.nix
index 3e85a3cfaa0..feb27181244 100644
--- a/pkgs/development/python-modules/lightblue/default.nix
+++ b/pkgs/development/python-modules/lightblue/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchurl
 , pkgs
diff --git a/pkgs/development/python-modules/lightning/default.nix b/pkgs/development/python-modules/lightning/default.nix
index 782bd41413e..f6d21f95dbf 100644
--- a/pkgs/development/python-modules/lightning/default.nix
+++ b/pkgs/development/python-modules/lightning/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pytest
diff --git a/pkgs/development/python-modules/limits/default.nix b/pkgs/development/python-modules/limits/default.nix
index e1cd31867de..fc6982440d6 100644
--- a/pkgs/development/python-modules/limits/default.nix
+++ b/pkgs/development/python-modules/limits/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage, six }:
+{ lib, fetchPypi, buildPythonPackage, six }:
 
 buildPythonPackage rec {
   pname = "limits";
diff --git a/pkgs/development/python-modules/limnoria/default.nix b/pkgs/development/python-modules/limnoria/default.nix
index c92e014e989..ff7ac9fb3f9 100644
--- a/pkgs/development/python-modules/limnoria/default.nix
+++ b/pkgs/development/python-modules/limnoria/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy27
diff --git a/pkgs/development/python-modules/linecache2/default.nix b/pkgs/development/python-modules/linecache2/default.nix
index 3945ec5001c..3c2238b0875 100644
--- a/pkgs/development/python-modules/linecache2/default.nix
+++ b/pkgs/development/python-modules/linecache2/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pbr
diff --git a/pkgs/development/python-modules/linode-api/default.nix b/pkgs/development/python-modules/linode-api/default.nix
index 61624a64d66..7df182d94fe 100644
--- a/pkgs/development/python-modules/linode-api/default.nix
+++ b/pkgs/development/python-modules/linode-api/default.nix
@@ -1,4 +1,4 @@
-{ stdenv,
+{
   buildPythonPackage,
   fetchFromGitHub,
   pythonOlder,
diff --git a/pkgs/development/python-modules/linode/default.nix b/pkgs/development/python-modules/linode/default.nix
index 611b91bb930..3433c0e5717 100644
--- a/pkgs/development/python-modules/linode/default.nix
+++ b/pkgs/development/python-modules/linode/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , requests
diff --git a/pkgs/development/python-modules/livelossplot/default.nix b/pkgs/development/python-modules/livelossplot/default.nix
index bbf1b966bf1..2951ab7a427 100644
--- a/pkgs/development/python-modules/livelossplot/default.nix
+++ b/pkgs/development/python-modules/livelossplot/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 , isPy27
diff --git a/pkgs/development/python-modules/livestreamer-curses/default.nix b/pkgs/development/python-modules/livestreamer-curses/default.nix
index d76eb736ac7..5f17a700617 100644
--- a/pkgs/development/python-modules/livestreamer-curses/default.nix
+++ b/pkgs/development/python-modules/livestreamer-curses/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchurl
 , isPyPy
diff --git a/pkgs/development/python-modules/livestreamer/default.nix b/pkgs/development/python-modules/livestreamer/default.nix
index 7ae9124bb82..184a215c407 100644
--- a/pkgs/development/python-modules/livestreamer/default.nix
+++ b/pkgs/development/python-modules/livestreamer/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , pkgs
 , isPyPy
diff --git a/pkgs/development/python-modules/lmdb/default.nix b/pkgs/development/python-modules/lmdb/default.nix
index 20020b97ef2..f3e7a86a2aa 100644
--- a/pkgs/development/python-modules/lmdb/default.nix
+++ b/pkgs/development/python-modules/lmdb/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pytestCheckHook
diff --git a/pkgs/development/python-modules/lmtpd/default.nix b/pkgs/development/python-modules/lmtpd/default.nix
index 3a1beba29d4..bb27c29173b 100644
--- a/pkgs/development/python-modules/lmtpd/default.nix
+++ b/pkgs/development/python-modules/lmtpd/default.nix
@@ -1,4 +1,4 @@
-{ buildPythonPackage, fetchPypi, isPy3k, lib, stdenv }:
+{ buildPythonPackage, fetchPypi, isPy3k, lib }:
 
 buildPythonPackage rec {
   pname = "lmtpd";
diff --git a/pkgs/development/python-modules/localzone/default.nix b/pkgs/development/python-modules/localzone/default.nix
index 8690b1e4c91..0960a824817 100644
--- a/pkgs/development/python-modules/localzone/default.nix
+++ b/pkgs/development/python-modules/localzone/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 , dnspython
diff --git a/pkgs/development/python-modules/locket/default.nix b/pkgs/development/python-modules/locket/default.nix
index 45985a17d3e..e0be7d8f944 100644
--- a/pkgs/development/python-modules/locket/default.nix
+++ b/pkgs/development/python-modules/locket/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, pytest }:
+{ lib, buildPythonPackage, fetchPypi, pytest }:
 
 buildPythonPackage rec {
   pname = "locket";
diff --git a/pkgs/development/python-modules/logilab/common.nix b/pkgs/development/python-modules/logilab/common.nix
index b7ba746d79e..a1cb1b248ae 100644
--- a/pkgs/development/python-modules/logilab/common.nix
+++ b/pkgs/development/python-modules/logilab/common.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, isPy27, unittest2, six }:
+{ lib, buildPythonPackage, fetchPypi, isPy27, unittest2, six }:
 
 buildPythonPackage rec {
   pname = "logilab-common";
diff --git a/pkgs/development/python-modules/logilab/constraint.nix b/pkgs/development/python-modules/logilab/constraint.nix
index 9a071b5cf5f..bbc65a51c3c 100644
--- a/pkgs/development/python-modules/logilab/constraint.nix
+++ b/pkgs/development/python-modules/logilab/constraint.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, logilab_common, six }:
+{ lib, buildPythonPackage, fetchPypi, logilab_common, six }:
 
 buildPythonPackage rec {
   pname = "logilab-constraint";
diff --git a/pkgs/development/python-modules/logilab_astng/default.nix b/pkgs/development/python-modules/logilab_astng/default.nix
index 15cea1d7baa..dac5862324a 100644
--- a/pkgs/development/python-modules/logilab_astng/default.nix
+++ b/pkgs/development/python-modules/logilab_astng/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchurl
 , logilab_common
diff --git a/pkgs/development/python-modules/logutils/default.nix b/pkgs/development/python-modules/logutils/default.nix
index d49667d7cc8..0a49262647e 100644
--- a/pkgs/development/python-modules/logutils/default.nix
+++ b/pkgs/development/python-modules/logutils/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/lpod/default.nix b/pkgs/development/python-modules/lpod/default.nix
index 67b48cecd62..9c719d234f8 100644
--- a/pkgs/development/python-modules/lpod/default.nix
+++ b/pkgs/development/python-modules/lpod/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 , lxml
diff --git a/pkgs/development/python-modules/lsi/default.nix b/pkgs/development/python-modules/lsi/default.nix
index 0fca2f7b372..b570a62d9e3 100644
--- a/pkgs/development/python-modules/lsi/default.nix
+++ b/pkgs/development/python-modules/lsi/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , isPy3k
 , fetchPypi
diff --git a/pkgs/development/python-modules/lxc/default.nix b/pkgs/development/python-modules/lxc/default.nix
index a20db9dd503..4534e0a01ef 100644
--- a/pkgs/development/python-modules/lxc/default.nix
+++ b/pkgs/development/python-modules/lxc/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 , isPy3k
diff --git a/pkgs/development/python-modules/lyricwikia/default.nix b/pkgs/development/python-modules/lyricwikia/default.nix
index 585c38ab33e..a5ea55c39cf 100644
--- a/pkgs/development/python-modules/lyricwikia/default.nix
+++ b/pkgs/development/python-modules/lyricwikia/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage, pytestrunner, six, beautifulsoup4, requests, }:
+{ lib, fetchPypi, buildPythonPackage, pytestrunner, six, beautifulsoup4, requests, }:
 buildPythonPackage rec {
   pname = "lyricwikia";
   version = "0.1.11";
diff --git a/pkgs/development/python-modules/m2crypto/default.nix b/pkgs/development/python-modules/m2crypto/default.nix
index af07be47dcd..8e214540b12 100644
--- a/pkgs/development/python-modules/m2crypto/default.nix
+++ b/pkgs/development/python-modules/m2crypto/default.nix
@@ -1,5 +1,4 @@
-{ stdenv
-, lib
+{ lib
 , fetchpatch
 , buildPythonPackage
 , fetchPypi
diff --git a/pkgs/development/python-modules/m2r/default.nix b/pkgs/development/python-modules/m2r/default.nix
index 149e4d6ed56..35331c14b08 100644
--- a/pkgs/development/python-modules/m2r/default.nix
+++ b/pkgs/development/python-modules/m2r/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi,
+{ lib, buildPythonPackage, fetchPypi,
   mistune, docutils } :
 buildPythonPackage rec {
   pname = "m2r";
diff --git a/pkgs/development/python-modules/magic-wormhole-mailbox-server/default.nix b/pkgs/development/python-modules/magic-wormhole-mailbox-server/default.nix
index 14ae268c03a..dfd16c04a6f 100644
--- a/pkgs/development/python-modules/magic-wormhole-mailbox-server/default.nix
+++ b/pkgs/development/python-modules/magic-wormhole-mailbox-server/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, isPy27, six, attrs, twisted, pyopenssl, service-identity, autobahn, treq, mock, pytest }:
+{ lib, buildPythonPackage, fetchPypi, isPy27, six, attrs, twisted, pyopenssl, service-identity, autobahn, treq, mock, pytest }:
 
 buildPythonPackage rec {
   version = "0.4.1";
diff --git a/pkgs/development/python-modules/mailcap-fix/default.nix b/pkgs/development/python-modules/mailcap-fix/default.nix
index 08991edce4a..da735d9d048 100644
--- a/pkgs/development/python-modules/mailcap-fix/default.nix
+++ b/pkgs/development/python-modules/mailcap-fix/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy36
diff --git a/pkgs/development/python-modules/mailchimp/default.nix b/pkgs/development/python-modules/mailchimp/default.nix
index 0032caa7a0a..91563b7fe7e 100644
--- a/pkgs/development/python-modules/mailchimp/default.nix
+++ b/pkgs/development/python-modules/mailchimp/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , docopt
diff --git a/pkgs/development/python-modules/mailman-hyperkitty/default.nix b/pkgs/development/python-modules/mailman-hyperkitty/default.nix
index 8ab80e33717..1d3b69f6bf2 100644
--- a/pkgs/development/python-modules/mailman-hyperkitty/default.nix
+++ b/pkgs/development/python-modules/mailman-hyperkitty/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, mailman, mock }:
+{ lib, buildPythonPackage, fetchPypi, mailman, mock }:
 
 buildPythonPackage rec {
   pname = "mailman-hyperkitty";
diff --git a/pkgs/development/python-modules/mailman-rss/default.nix b/pkgs/development/python-modules/mailman-rss/default.nix
index 84c97eb16e2..e2043b0d6d4 100644
--- a/pkgs/development/python-modules/mailman-rss/default.nix
+++ b/pkgs/development/python-modules/mailman-rss/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python3Packages, withTwitter ? false}:
+{ lib, python3Packages, withTwitter ? false}:
 
 python3Packages.buildPythonApplication rec {
   pname = "mailman-rss";
diff --git a/pkgs/development/python-modules/mailmanclient/default.nix b/pkgs/development/python-modules/mailmanclient/default.nix
index 280ee95b830..edc19f66f71 100644
--- a/pkgs/development/python-modules/mailmanclient/default.nix
+++ b/pkgs/development/python-modules/mailmanclient/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, isPy3k, six, httplib2, requests }:
+{ lib, buildPythonPackage, fetchPypi, isPy3k, six, httplib2, requests }:
 
 buildPythonPackage rec {
   pname = "mailmanclient";
diff --git a/pkgs/development/python-modules/manuel/default.nix b/pkgs/development/python-modules/manuel/default.nix
index 59243783ecf..2f14ed863c3 100644
--- a/pkgs/development/python-modules/manuel/default.nix
+++ b/pkgs/development/python-modules/manuel/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy27
diff --git a/pkgs/development/python-modules/mapsplotlib/default.nix b/pkgs/development/python-modules/mapsplotlib/default.nix
index 54d0ade40f3..28a6e9c0c5c 100644
--- a/pkgs/development/python-modules/mapsplotlib/default.nix
+++ b/pkgs/development/python-modules/mapsplotlib/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , isPy3k
 , fetchPypi
diff --git a/pkgs/development/python-modules/marionette-harness/mozinfo.nix b/pkgs/development/python-modules/marionette-harness/mozinfo.nix
index b7d91cc16f5..99f3afc31f6 100644
--- a/pkgs/development/python-modules/marionette-harness/mozinfo.nix
+++ b/pkgs/development/python-modules/marionette-harness/mozinfo.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy3k
diff --git a/pkgs/development/python-modules/marisa/default.nix b/pkgs/development/python-modules/marisa/default.nix
index a30f7062df0..93a4ccb959f 100644
--- a/pkgs/development/python-modules/marisa/default.nix
+++ b/pkgs/development/python-modules/marisa/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub, marisa, swig
+{ lib, buildPythonPackage, fetchFromGitHub, marisa, swig
 , isPy3k
 }:
 
diff --git a/pkgs/development/python-modules/markdown-macros/default.nix b/pkgs/development/python-modules/markdown-macros/default.nix
index e248bfe60cc..e95cbe3c4c1 100644
--- a/pkgs/development/python-modules/markdown-macros/default.nix
+++ b/pkgs/development/python-modules/markdown-macros/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , fetchpatch
diff --git a/pkgs/development/python-modules/markdown2/default.nix b/pkgs/development/python-modules/markdown2/default.nix
index 2f929012df8..b1513d06e58 100644
--- a/pkgs/development/python-modules/markdown2/default.nix
+++ b/pkgs/development/python-modules/markdown2/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "markdown2";
diff --git a/pkgs/development/python-modules/markerlib/default.nix b/pkgs/development/python-modules/markerlib/default.nix
index d039198b393..7762a970fb1 100644
--- a/pkgs/development/python-modules/markerlib/default.nix
+++ b/pkgs/development/python-modules/markerlib/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , setuptools
diff --git a/pkgs/development/python-modules/markupsafe/default.nix b/pkgs/development/python-modules/markupsafe/default.nix
index 6a6e06cd317..ae0878c7a97 100644
--- a/pkgs/development/python-modules/markupsafe/default.nix
+++ b/pkgs/development/python-modules/markupsafe/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/matrix-client/default.nix b/pkgs/development/python-modules/matrix-client/default.nix
index 34c99a1ebe1..b8439a0c23d 100644
--- a/pkgs/development/python-modules/matrix-client/default.nix
+++ b/pkgs/development/python-modules/matrix-client/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , requests
diff --git a/pkgs/development/python-modules/maya/default.nix b/pkgs/development/python-modules/maya/default.nix
index 9cd1019a030..4a751a188c2 100644
--- a/pkgs/development/python-modules/maya/default.nix
+++ b/pkgs/development/python-modules/maya/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, fetchpatch, buildPythonPackage
+{ lib, fetchPypi, fetchpatch, buildPythonPackage
 , dateparser, humanize, pendulum, ruamel_yaml, tzlocal }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/mccabe/default.nix b/pkgs/development/python-modules/mccabe/default.nix
index 2886a436a00..03343aec16e 100644
--- a/pkgs/development/python-modules/mccabe/default.nix
+++ b/pkgs/development/python-modules/mccabe/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, pytest, pytestrunner }:
+{ lib, buildPythonPackage, fetchPypi, pytest, pytestrunner }:
 
 buildPythonPackage rec {
   pname = "mccabe";
diff --git a/pkgs/development/python-modules/mdp/default.nix b/pkgs/development/python-modules/mdp/default.nix
index 5313cd8e89a..55a440e6808 100644
--- a/pkgs/development/python-modules/mdp/default.nix
+++ b/pkgs/development/python-modules/mdp/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, pytest, future, numpy }:
+{ lib, buildPythonPackage, fetchPypi, pytest, future, numpy }:
 
 buildPythonPackage rec {
   pname = "MDP";
diff --git a/pkgs/development/python-modules/mechanize/default.nix b/pkgs/development/python-modules/mechanize/default.nix
index e2d2269a43c..7eb119fa955 100644
--- a/pkgs/development/python-modules/mechanize/default.nix
+++ b/pkgs/development/python-modules/mechanize/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , html5lib
diff --git a/pkgs/development/python-modules/meinheld/default.nix b/pkgs/development/python-modules/meinheld/default.nix
index ce7f2316800..9cf02e4c886 100644
--- a/pkgs/development/python-modules/meinheld/default.nix
+++ b/pkgs/development/python-modules/meinheld/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage, greenlet }:
+{ lib, fetchPypi, buildPythonPackage, greenlet }:
 
 buildPythonPackage rec {
   pname = "meinheld";
diff --git a/pkgs/development/python-modules/meld3/default.nix b/pkgs/development/python-modules/meld3/default.nix
index 8871bfdda46..a751dbeac3f 100644
--- a/pkgs/development/python-modules/meld3/default.nix
+++ b/pkgs/development/python-modules/meld3/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/meliae/default.nix b/pkgs/development/python-modules/meliae/default.nix
index d602e3d94fd..4c6aa746448 100644
--- a/pkgs/development/python-modules/meliae/default.nix
+++ b/pkgs/development/python-modules/meliae/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , cython
diff --git a/pkgs/development/python-modules/memcached/default.nix b/pkgs/development/python-modules/memcached/default.nix
index b75bd31361d..02f4bc3aa44 100644
--- a/pkgs/development/python-modules/memcached/default.nix
+++ b/pkgs/development/python-modules/memcached/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchurl
 , fetchPypi
diff --git a/pkgs/development/python-modules/memory_profiler/default.nix b/pkgs/development/python-modules/memory_profiler/default.nix
index 28ff6b7c5e3..994863dbbc0 100644
--- a/pkgs/development/python-modules/memory_profiler/default.nix
+++ b/pkgs/development/python-modules/memory_profiler/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , python
 }:
 
diff --git a/pkgs/development/python-modules/mergedeep/default.nix b/pkgs/development/python-modules/mergedeep/default.nix
index bcbca347548..cdd19beb68d 100644
--- a/pkgs/development/python-modules/mergedeep/default.nix
+++ b/pkgs/development/python-modules/mergedeep/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, isPy27, fetchFromGitHub, pytest }:
+{ lib, buildPythonPackage, isPy27, fetchFromGitHub, pytest }:
 
 buildPythonPackage rec {
   pname = "mergedeep";
diff --git a/pkgs/development/python-modules/mesa/default.nix b/pkgs/development/python-modules/mesa/default.nix
index 5b97f972dad..aaf13a76530 100644
--- a/pkgs/development/python-modules/mesa/default.nix
+++ b/pkgs/development/python-modules/mesa/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub, isPy27
+{ lib, buildPythonPackage, fetchFromGitHub, isPy27
 , cookiecutter, networkx , pandas, tornado, tqdm
 , pytest }:
 
diff --git a/pkgs/development/python-modules/metaphone/default.nix b/pkgs/development/python-modules/metaphone/default.nix
index 1c8557f15c4..d6b0c30c504 100644
--- a/pkgs/development/python-modules/metaphone/default.nix
+++ b/pkgs/development/python-modules/metaphone/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, isPy3k, fetchPypi, nose }:
+{ lib, buildPythonPackage, isPy3k, fetchPypi, nose }:
 
 buildPythonPackage rec {
   pname = "metaphone";
diff --git a/pkgs/development/python-modules/mezzanine/default.nix b/pkgs/development/python-modules/mezzanine/default.nix
index 86deecb5d4f..c157cd2a6be 100644
--- a/pkgs/development/python-modules/mezzanine/default.nix
+++ b/pkgs/development/python-modules/mezzanine/default.nix
@@ -1,5 +1,5 @@
 { lib
-, stdenv
+
 , buildPythonPackage
 , fetchPypi
 , isPyPy
diff --git a/pkgs/development/python-modules/micawber/default.nix b/pkgs/development/python-modules/micawber/default.nix
index 9d31dd378ac..73f50d32a5f 100644
--- a/pkgs/development/python-modules/micawber/default.nix
+++ b/pkgs/development/python-modules/micawber/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, beautifulsoup4 }:
+{ lib, buildPythonPackage, fetchPypi, beautifulsoup4 }:
 
 buildPythonPackage rec {
   pname = "micawber";
diff --git a/pkgs/development/python-modules/midiutil/default.nix b/pkgs/development/python-modules/midiutil/default.nix
index 5ac8d917d75..d1cae8c7804 100644
--- a/pkgs/development/python-modules/midiutil/default.nix
+++ b/pkgs/development/python-modules/midiutil/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "MIDIUtil";
diff --git a/pkgs/development/python-modules/milc/default.nix b/pkgs/development/python-modules/milc/default.nix
index dc824d56547..998f0a58b2b 100644
--- a/pkgs/development/python-modules/milc/default.nix
+++ b/pkgs/development/python-modules/milc/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 , appdirs
diff --git a/pkgs/development/python-modules/minimock/default.nix b/pkgs/development/python-modules/minimock/default.nix
index f154eabb744..faa836b71d7 100644
--- a/pkgs/development/python-modules/minimock/default.nix
+++ b/pkgs/development/python-modules/minimock/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchurl
 , nose
diff --git a/pkgs/development/python-modules/miniupnpc/default.nix b/pkgs/development/python-modules/miniupnpc/default.nix
index 7178405ab74..fe7a9f69691 100644
--- a/pkgs/development/python-modules/miniupnpc/default.nix
+++ b/pkgs/development/python-modules/miniupnpc/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "miniupnpc";
diff --git a/pkgs/development/python-modules/mlflow/default.nix b/pkgs/development/python-modules/mlflow/default.nix
index 89cc8f99146..5ffde397337 100644
--- a/pkgs/development/python-modules/mlflow/default.nix
+++ b/pkgs/development/python-modules/mlflow/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, isPy27
+{ lib, buildPythonPackage, fetchPypi, isPy27
 , alembic
 , click
 , cloudpickle
diff --git a/pkgs/development/python-modules/mlrose/default.nix b/pkgs/development/python-modules/mlrose/default.nix
index c3c7c55f292..40e3b6ce095 100644
--- a/pkgs/development/python-modules/mlrose/default.nix
+++ b/pkgs/development/python-modules/mlrose/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, isPy27, buildPythonPackage, fetchPypi, scikitlearn }:
+{ lib, isPy27, buildPythonPackage, fetchPypi, scikitlearn }:
 
 buildPythonPackage rec {
   pname = "mlrose";
diff --git a/pkgs/development/python-modules/mlxtend/default.nix b/pkgs/development/python-modules/mlxtend/default.nix
index 94af156d9af..35f55bb2793 100644
--- a/pkgs/development/python-modules/mlxtend/default.nix
+++ b/pkgs/development/python-modules/mlxtend/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 , isPy27
diff --git a/pkgs/development/python-modules/mmpython/default.nix b/pkgs/development/python-modules/mmpython/default.nix
index e40fc197a5b..64c270ca072 100644
--- a/pkgs/development/python-modules/mmpython/default.nix
+++ b/pkgs/development/python-modules/mmpython/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchurl
 , isPyPy
diff --git a/pkgs/development/python-modules/mockito/default.nix b/pkgs/development/python-modules/mockito/default.nix
index d7ca86b8ea3..69cdf7b56b0 100644
--- a/pkgs/development/python-modules/mockito/default.nix
+++ b/pkgs/development/python-modules/mockito/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, isPy3k, funcsigs, pytest, numpy }:
+{ lib, buildPythonPackage, fetchPypi, isPy3k, funcsigs, pytest, numpy }:
 
 buildPythonPackage rec {
   version = "1.2.2";
diff --git a/pkgs/development/python-modules/modestmaps/default.nix b/pkgs/development/python-modules/modestmaps/default.nix
index a7862ef5c67..202589b7435 100644
--- a/pkgs/development/python-modules/modestmaps/default.nix
+++ b/pkgs/development/python-modules/modestmaps/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pillow
diff --git a/pkgs/development/python-modules/mongodict/default.nix b/pkgs/development/python-modules/mongodict/default.nix
index 467093e84ce..c2fbd6a7ad1 100644
--- a/pkgs/development/python-modules/mongodict/default.nix
+++ b/pkgs/development/python-modules/mongodict/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pymongo
diff --git a/pkgs/development/python-modules/moretools/default.nix b/pkgs/development/python-modules/moretools/default.nix
index d39f67a7311..5a96682accd 100644
--- a/pkgs/development/python-modules/moretools/default.nix
+++ b/pkgs/development/python-modules/moretools/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , six, pathpy, zetup, pytest
 , decorator }:
 
diff --git a/pkgs/development/python-modules/moviepy/default.nix b/pkgs/development/python-modules/moviepy/default.nix
index 8bc984a5287..4cd1fec3d8b 100644
--- a/pkgs/development/python-modules/moviepy/default.nix
+++ b/pkgs/development/python-modules/moviepy/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pythonAtLeast
diff --git a/pkgs/development/python-modules/mox/default.nix b/pkgs/development/python-modules/mox/default.nix
index 94d4791224d..380dbe594a5 100644
--- a/pkgs/development/python-modules/mox/default.nix
+++ b/pkgs/development/python-modules/mox/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchurl
 }:
diff --git a/pkgs/development/python-modules/mox3/default.nix b/pkgs/development/python-modules/mox3/default.nix
index 77a02ae8a73..1883c9c8c01 100644
--- a/pkgs/development/python-modules/mox3/default.nix
+++ b/pkgs/development/python-modules/mox3/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pythonOlder
diff --git a/pkgs/development/python-modules/mozsvc/default.nix b/pkgs/development/python-modules/mozsvc/default.nix
index 55afb1773fe..0caa347edac 100644
--- a/pkgs/development/python-modules/mozsvc/default.nix
+++ b/pkgs/development/python-modules/mozsvc/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 , pyramid
diff --git a/pkgs/development/python-modules/mpd/default.nix b/pkgs/development/python-modules/mpd/default.nix
index 212e6b5f13c..b535144fac9 100644
--- a/pkgs/development/python-modules/mpd/default.nix
+++ b/pkgs/development/python-modules/mpd/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy3k
diff --git a/pkgs/development/python-modules/mpd2/default.nix b/pkgs/development/python-modules/mpd2/default.nix
index 7fdf64c0e4b..031f26c4997 100644
--- a/pkgs/development/python-modules/mpd2/default.nix
+++ b/pkgs/development/python-modules/mpd2/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pythonOlder
diff --git a/pkgs/development/python-modules/mpmath/default.nix b/pkgs/development/python-modules/mpmath/default.nix
index 86d55b34f04..3569f6239f0 100644
--- a/pkgs/development/python-modules/mpmath/default.nix
+++ b/pkgs/development/python-modules/mpmath/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/mrbob/default.nix b/pkgs/development/python-modules/mrbob/default.nix
index 64d0ce13a86..8921719a3ae 100644
--- a/pkgs/development/python-modules/mrbob/default.nix
+++ b/pkgs/development/python-modules/mrbob/default.nix
@@ -1,4 +1,4 @@
-{ buildPythonPackage, lib, stdenv, glibcLocales, mock, nose, isPy3k, jinja2, six
+{ buildPythonPackage, lib, glibcLocales, mock, nose, isPy3k, jinja2, six
 , fetchPypi
 }:
 
diff --git a/pkgs/development/python-modules/msgpack-numpy/default.nix b/pkgs/development/python-modules/msgpack-numpy/default.nix
index 56bfa06a628..8b50e04d428 100644
--- a/pkgs/development/python-modules/msgpack-numpy/default.nix
+++ b/pkgs/development/python-modules/msgpack-numpy/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , cython
diff --git a/pkgs/development/python-modules/msrplib/default.nix b/pkgs/development/python-modules/msrplib/default.nix
index 16c4cc0f43a..e615b3e34e2 100644
--- a/pkgs/development/python-modules/msrplib/default.nix
+++ b/pkgs/development/python-modules/msrplib/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchdarcs
 , eventlib
diff --git a/pkgs/development/python-modules/multi_key_dict/default.nix b/pkgs/development/python-modules/multi_key_dict/default.nix
index f76cde9bec5..cb539e4dd90 100644
--- a/pkgs/development/python-modules/multi_key_dict/default.nix
+++ b/pkgs/development/python-modules/multi_key_dict/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/munch/default.nix b/pkgs/development/python-modules/munch/default.nix
index 2ff2ce4cefb..f6ca7c1d690 100644
--- a/pkgs/development/python-modules/munch/default.nix
+++ b/pkgs/development/python-modules/munch/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , six
diff --git a/pkgs/development/python-modules/munkres/default.nix b/pkgs/development/python-modules/munkres/default.nix
index cb88b666cfa..ffb4f877490 100644
--- a/pkgs/development/python-modules/munkres/default.nix
+++ b/pkgs/development/python-modules/munkres/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , fetchpatch
diff --git a/pkgs/development/python-modules/murmurhash/default.nix b/pkgs/development/python-modules/murmurhash/default.nix
index 68aa29a6ede..c2a7eb19337 100644
--- a/pkgs/development/python-modules/murmurhash/default.nix
+++ b/pkgs/development/python-modules/murmurhash/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , cython
diff --git a/pkgs/development/python-modules/musicbrainzngs/default.nix b/pkgs/development/python-modules/musicbrainzngs/default.nix
index 02ec3815711..e5f5eff6b28 100644
--- a/pkgs/development/python-modules/musicbrainzngs/default.nix
+++ b/pkgs/development/python-modules/musicbrainzngs/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pkgs
diff --git a/pkgs/development/python-modules/mutag/default.nix b/pkgs/development/python-modules/mutag/default.nix
index 45725c0fabb..ee190008f59 100644
--- a/pkgs/development/python-modules/mutag/default.nix
+++ b/pkgs/development/python-modules/mutag/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchgit
 , isPy3k
diff --git a/pkgs/development/python-modules/muttils/default.nix b/pkgs/development/python-modules/muttils/default.nix
index 1d6b5ce8df4..98f96d13212 100644
--- a/pkgs/development/python-modules/muttils/default.nix
+++ b/pkgs/development/python-modules/muttils/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchurl
 , isPy3k
diff --git a/pkgs/development/python-modules/mwclient/default.nix b/pkgs/development/python-modules/mwclient/default.nix
index ac9373b574a..2eed1eefeec 100644
--- a/pkgs/development/python-modules/mwclient/default.nix
+++ b/pkgs/development/python-modules/mwclient/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub
+{ lib, buildPythonPackage, fetchFromGitHub
 , requests, requests_oauthlib, six
 , pytest, pytestcache, pytestcov, responses, mock
 }:
diff --git a/pkgs/development/python-modules/mwlib-ext/default.nix b/pkgs/development/python-modules/mwlib-ext/default.nix
index 0a81fd58d7e..b9b18eaf9e5 100644
--- a/pkgs/development/python-modules/mwlib-ext/default.nix
+++ b/pkgs/development/python-modules/mwlib-ext/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy3k
diff --git a/pkgs/development/python-modules/mwlib-rl/default.nix b/pkgs/development/python-modules/mwlib-rl/default.nix
index d27de2ed45c..fdb70726eb6 100644
--- a/pkgs/development/python-modules/mwlib-rl/default.nix
+++ b/pkgs/development/python-modules/mwlib-rl/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , mwlib
diff --git a/pkgs/development/python-modules/mwlib/default.nix b/pkgs/development/python-modules/mwlib/default.nix
index e9defe3ee14..d9edb2ef3ba 100644
--- a/pkgs/development/python-modules/mwlib/default.nix
+++ b/pkgs/development/python-modules/mwlib/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy3k
diff --git a/pkgs/development/python-modules/mwparserfromhell/default.nix b/pkgs/development/python-modules/mwparserfromhell/default.nix
index 0546688b867..56aa4661516 100644
--- a/pkgs/development/python-modules/mwparserfromhell/default.nix
+++ b/pkgs/development/python-modules/mwparserfromhell/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/mypy-protobuf/default.nix b/pkgs/development/python-modules/mypy-protobuf/default.nix
index f444ba039c2..69178edb691 100644
--- a/pkgs/development/python-modules/mypy-protobuf/default.nix
+++ b/pkgs/development/python-modules/mypy-protobuf/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonApplication, protobuf }:
+{ lib, fetchPypi, buildPythonApplication, protobuf }:
 
 buildPythonApplication rec {
   pname = "mypy-protobuf";
diff --git a/pkgs/development/python-modules/mypy/extensions.nix b/pkgs/development/python-modules/mypy/extensions.nix
index 21a3ee21dbd..5992a6815d8 100644
--- a/pkgs/development/python-modules/mypy/extensions.nix
+++ b/pkgs/development/python-modules/mypy/extensions.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage, typing, pythonOlder }:
+{ lib, fetchPypi, buildPythonPackage, typing, pythonOlder }:
 
 buildPythonPackage rec {
   pname = "mypy-extensions";
diff --git a/pkgs/development/python-modules/mysqlclient/default.nix b/pkgs/development/python-modules/mysqlclient/default.nix
index 9d91543b7ff..b7a0f39990e 100644
--- a/pkgs/development/python-modules/mysqlclient/default.nix
+++ b/pkgs/development/python-modules/mysqlclient/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, libmysqlclient }:
+{ lib, buildPythonPackage, fetchPypi, libmysqlclient }:
 
 buildPythonPackage rec {
   pname = "mysqlclient";
diff --git a/pkgs/development/python-modules/namebench/default.nix b/pkgs/development/python-modules/namebench/default.nix
index eefdcce7990..b7b542b8a7a 100644
--- a/pkgs/development/python-modules/namebench/default.nix
+++ b/pkgs/development/python-modules/namebench/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , isPy3k
 , isPyPy
diff --git a/pkgs/development/python-modules/nameparser/default.nix b/pkgs/development/python-modules/nameparser/default.nix
index 0c8e442affc..0d7b53f03cb 100644
--- a/pkgs/development/python-modules/nameparser/default.nix
+++ b/pkgs/development/python-modules/nameparser/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , glibcLocales
diff --git a/pkgs/development/python-modules/nanoleaf/default.nix b/pkgs/development/python-modules/nanoleaf/default.nix
index f6131cd5309..8712c582bed 100644
--- a/pkgs/development/python-modules/nanoleaf/default.nix
+++ b/pkgs/development/python-modules/nanoleaf/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, requests }:
+{ lib, buildPythonPackage, fetchPypi, requests }:
 
 buildPythonPackage rec {
   pname = "nanoleaf";
diff --git a/pkgs/development/python-modules/nanomsg-python/default.nix b/pkgs/development/python-modules/nanomsg-python/default.nix
index 4cf33fb2074..765941457d4 100644
--- a/pkgs/development/python-modules/nanomsg-python/default.nix
+++ b/pkgs/development/python-modules/nanomsg-python/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub, nanomsg }:
+{ lib, buildPythonPackage, fetchFromGitHub, nanomsg }:
 
 buildPythonPackage {
   pname = "nanomsg-python";
diff --git a/pkgs/development/python-modules/nbclient/default.nix b/pkgs/development/python-modules/nbclient/default.nix
index d846511eb3f..c320415e075 100644
--- a/pkgs/development/python-modules/nbclient/default.nix
+++ b/pkgs/development/python-modules/nbclient/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, pythonOlder,
+{ lib, buildPythonPackage, fetchPypi, pythonOlder,
   async_generator, traitlets, nbformat, nest-asyncio, jupyter_client,
   pytest, xmltodict, nbconvert, ipywidgets
 , doCheck ? true
diff --git a/pkgs/development/python-modules/nbxmpp/default.nix b/pkgs/development/python-modules/nbxmpp/default.nix
index 28946bd1a6e..3826a746758 100644
--- a/pkgs/development/python-modules/nbxmpp/default.nix
+++ b/pkgs/development/python-modules/nbxmpp/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchzip, gobject-introspection, idna, libsoup, precis-i18n, pygobject3, pyopenssl }:
+{ lib, buildPythonPackage, fetchzip, gobject-introspection, idna, libsoup, precis-i18n, pygobject3, pyopenssl }:
 
 let
   pname = "nbxmpp";
diff --git a/pkgs/development/python-modules/ncclient/default.nix b/pkgs/development/python-modules/ncclient/default.nix
index f933587dcad..ba3b9e4b087 100644
--- a/pkgs/development/python-modules/ncclient/default.nix
+++ b/pkgs/development/python-modules/ncclient/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , paramiko
diff --git a/pkgs/development/python-modules/ndg-httpsclient/default.nix b/pkgs/development/python-modules/ndg-httpsclient/default.nix
index 7768614a5d1..0082b8e8db2 100644
--- a/pkgs/development/python-modules/ndg-httpsclient/default.nix
+++ b/pkgs/development/python-modules/ndg-httpsclient/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 , pyopenssl
diff --git a/pkgs/development/python-modules/netaddr/default.nix b/pkgs/development/python-modules/netaddr/default.nix
index 7f4aab9c371..3f7f78a374c 100644
--- a/pkgs/development/python-modules/netaddr/default.nix
+++ b/pkgs/development/python-modules/netaddr/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pythonOlder
diff --git a/pkgs/development/python-modules/netcdf4/default.nix b/pkgs/development/python-modules/netcdf4/default.nix
index 456124b19bd..60f7dbe6c23 100644
--- a/pkgs/development/python-modules/netcdf4/default.nix
+++ b/pkgs/development/python-modules/netcdf4/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, buildPythonPackage, fetchPypi, isPyPy, pytest
+{ lib, buildPythonPackage, fetchPypi, isPyPy, pytest
 , numpy, zlib, netcdf, hdf5, curl, libjpeg, cython, cftime
 }:
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/netdisco/default.nix b/pkgs/development/python-modules/netdisco/default.nix
index e546ac6cd57..489b6bddf56 100644
--- a/pkgs/development/python-modules/netdisco/default.nix
+++ b/pkgs/development/python-modules/netdisco/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, isPy3k, fetchPypi, requests, zeroconf, netifaces, pytest }:
+{ lib, buildPythonPackage, isPy3k, fetchPypi, requests, zeroconf, netifaces, pytest }:
 
 buildPythonPackage rec {
   pname = "netdisco";
diff --git a/pkgs/development/python-modules/netifaces/default.nix b/pkgs/development/python-modules/netifaces/default.nix
index 07dc63c2181..f7638b29a4c 100644
--- a/pkgs/development/python-modules/netifaces/default.nix
+++ b/pkgs/development/python-modules/netifaces/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/neuronpy/default.nix b/pkgs/development/python-modules/neuronpy/default.nix
index b81398f918c..2d388dfa4c2 100644
--- a/pkgs/development/python-modules/neuronpy/default.nix
+++ b/pkgs/development/python-modules/neuronpy/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , numpy
diff --git a/pkgs/development/python-modules/nevow/default.nix b/pkgs/development/python-modules/nevow/default.nix
index 356754fdeac..b608ae58fc7 100644
--- a/pkgs/development/python-modules/nevow/default.nix
+++ b/pkgs/development/python-modules/nevow/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchpatch, fetchPypi, isPy3k, twisted }:
+{ lib, buildPythonPackage, fetchpatch, fetchPypi, isPy3k, twisted }:
 
 buildPythonPackage rec {
   pname = "Nevow";
diff --git a/pkgs/development/python-modules/nimfa/default.nix b/pkgs/development/python-modules/nimfa/default.nix
index dc889440aa4..eb04e0c4d89 100644
--- a/pkgs/development/python-modules/nimfa/default.nix
+++ b/pkgs/development/python-modules/nimfa/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy3k
diff --git a/pkgs/development/python-modules/nine/default.nix b/pkgs/development/python-modules/nine/default.nix
index 1747332ed5a..e2ca5c6f27d 100644
--- a/pkgs/development/python-modules/nine/default.nix
+++ b/pkgs/development/python-modules/nine/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/nipy/default.nix b/pkgs/development/python-modules/nipy/default.nix
index cb7871aed61..6229baef32a 100644
--- a/pkgs/development/python-modules/nipy/default.nix
+++ b/pkgs/development/python-modules/nipy/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pythonOlder
diff --git a/pkgs/development/python-modules/nixpkgs/default.nix b/pkgs/development/python-modules/nixpkgs/default.nix
index 4edd31d6a25..acebe5d758f 100644
--- a/pkgs/development/python-modules/nixpkgs/default.nix
+++ b/pkgs/development/python-modules/nixpkgs/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pbr
diff --git a/pkgs/development/python-modules/node-semver/default.nix b/pkgs/development/python-modules/node-semver/default.nix
index 5ba62fb9210..535ff621de5 100644
--- a/pkgs/development/python-modules/node-semver/default.nix
+++ b/pkgs/development/python-modules/node-semver/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage, pytest }:
+{ lib, fetchPypi, buildPythonPackage, pytest }:
 
 buildPythonPackage rec {
   version = "0.7.0";
diff --git a/pkgs/development/python-modules/noise/default.nix b/pkgs/development/python-modules/noise/default.nix
index 98f336c4986..ebd0178602c 100644
--- a/pkgs/development/python-modules/noise/default.nix
+++ b/pkgs/development/python-modules/noise/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "noise";
diff --git a/pkgs/development/python-modules/nose-cover3/default.nix b/pkgs/development/python-modules/nose-cover3/default.nix
index 185270176ac..b75dcc526c5 100644
--- a/pkgs/development/python-modules/nose-cover3/default.nix
+++ b/pkgs/development/python-modules/nose-cover3/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , nose
diff --git a/pkgs/development/python-modules/nose-cprof/default.nix b/pkgs/development/python-modules/nose-cprof/default.nix
index 4f90ee4be8b..f4959ec7be7 100644
--- a/pkgs/development/python-modules/nose-cprof/default.nix
+++ b/pkgs/development/python-modules/nose-cprof/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , nose
diff --git a/pkgs/development/python-modules/nose-focus/default.nix b/pkgs/development/python-modules/nose-focus/default.nix
index 8e31867d85c..2805dc4545a 100644
--- a/pkgs/development/python-modules/nose-focus/default.nix
+++ b/pkgs/development/python-modules/nose-focus/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub, six, nose, nose-of-yeti
+{ lib, buildPythonPackage, fetchFromGitHub, six, nose, nose-of-yeti
 , nose-pattern-exclude, which }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/nose-of-yeti/default.nix b/pkgs/development/python-modules/nose-of-yeti/default.nix
index 2bd63f3295d..16fb264b39a 100644
--- a/pkgs/development/python-modules/nose-of-yeti/default.nix
+++ b/pkgs/development/python-modules/nose-of-yeti/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub, six, nose, fudge, should-dsl }:
+{ lib, buildPythonPackage, fetchFromGitHub, six, nose, fudge, should-dsl }:
 
 buildPythonPackage rec {
   pname = "nose-of-yeti";
diff --git a/pkgs/development/python-modules/nose-pattern-exclude/default.nix b/pkgs/development/python-modules/nose-pattern-exclude/default.nix
index 05a7102f1ae..a550dc5aee1 100644
--- a/pkgs/development/python-modules/nose-pattern-exclude/default.nix
+++ b/pkgs/development/python-modules/nose-pattern-exclude/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, nose }:
+{ lib, buildPythonPackage, fetchPypi, nose }:
 
 buildPythonPackage rec {
   pname = "nose-pattern-exclude";
diff --git a/pkgs/development/python-modules/nose/default.nix b/pkgs/development/python-modules/nose/default.nix
index 2805b7c2ea1..456bbfd9aed 100644
--- a/pkgs/development/python-modules/nose/default.nix
+++ b/pkgs/development/python-modules/nose/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , python
diff --git a/pkgs/development/python-modules/nose2/default.nix b/pkgs/development/python-modules/nose2/default.nix
index b815e223d82..29ea73619ff 100644
--- a/pkgs/development/python-modules/nose2/default.nix
+++ b/pkgs/development/python-modules/nose2/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , six
diff --git a/pkgs/development/python-modules/nose_progressive/default.nix b/pkgs/development/python-modules/nose_progressive/default.nix
index b920bb40736..bef7058bc3f 100644
--- a/pkgs/development/python-modules/nose_progressive/default.nix
+++ b/pkgs/development/python-modules/nose_progressive/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , nose
diff --git a/pkgs/development/python-modules/nosejs/default.nix b/pkgs/development/python-modules/nosejs/default.nix
index c165e87ff2e..f80953bd2d7 100644
--- a/pkgs/development/python-modules/nosejs/default.nix
+++ b/pkgs/development/python-modules/nosejs/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , nose
diff --git a/pkgs/development/python-modules/nosexcover/default.nix b/pkgs/development/python-modules/nosexcover/default.nix
index 36747a50aae..f60ed65448d 100644
--- a/pkgs/development/python-modules/nosexcover/default.nix
+++ b/pkgs/development/python-modules/nosexcover/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , coverage
diff --git a/pkgs/development/python-modules/notmuch/2.nix b/pkgs/development/python-modules/notmuch/2.nix
index 970928e03f4..bde039836ff 100644
--- a/pkgs/development/python-modules/notmuch/2.nix
+++ b/pkgs/development/python-modules/notmuch/2.nix
@@ -1,5 +1,5 @@
 { lib
-, stdenv
+
 , buildPythonPackage
 , notmuch
 , python
diff --git a/pkgs/development/python-modules/notmuch/default.nix b/pkgs/development/python-modules/notmuch/default.nix
index 609d4c78d5d..90695b84c66 100644
--- a/pkgs/development/python-modules/notmuch/default.nix
+++ b/pkgs/development/python-modules/notmuch/default.nix
@@ -1,5 +1,5 @@
 { lib
-, stdenv
+
 , buildPythonPackage
 , notmuch
 , python
diff --git a/pkgs/development/python-modules/ntplib/default.nix b/pkgs/development/python-modules/ntplib/default.nix
index 266482a8ff2..be8a370f3f3 100644
--- a/pkgs/development/python-modules/ntplib/default.nix
+++ b/pkgs/development/python-modules/ntplib/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/numericalunits/default.nix b/pkgs/development/python-modules/numericalunits/default.nix
index 0c71b065a32..8e2f630fdba 100644
--- a/pkgs/development/python-modules/numericalunits/default.nix
+++ b/pkgs/development/python-modules/numericalunits/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy3k
diff --git a/pkgs/development/python-modules/nvchecker/default.nix b/pkgs/development/python-modules/nvchecker/default.nix
index 832e281a9a1..17537be82b4 100644
--- a/pkgs/development/python-modules/nvchecker/default.nix
+++ b/pkgs/development/python-modules/nvchecker/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 , pythonOlder
diff --git a/pkgs/development/python-modules/nwdiag/default.nix b/pkgs/development/python-modules/nwdiag/default.nix
index 4676fdef0cd..c8147d9d9a4 100644
--- a/pkgs/development/python-modules/nwdiag/default.nix
+++ b/pkgs/development/python-modules/nwdiag/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, buildPythonPackage, pep8, nose, unittest2, docutils
+{ lib, fetchurl, buildPythonPackage, pep8, nose, unittest2, docutils
 , blockdiag, setuptools
 }:
 
diff --git a/pkgs/development/python-modules/nxt-python/default.nix b/pkgs/development/python-modules/nxt-python/default.nix
index 4057ba1de8a..38920dc5542 100644
--- a/pkgs/development/python-modules/nxt-python/default.nix
+++ b/pkgs/development/python-modules/nxt-python/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchgit
 , isPy3k
diff --git a/pkgs/development/python-modules/oath/default.nix b/pkgs/development/python-modules/oath/default.nix
index 158cf036840..fd12a830472 100644
--- a/pkgs/development/python-modules/oath/default.nix
+++ b/pkgs/development/python-modules/oath/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/oauth/default.nix b/pkgs/development/python-modules/oauth/default.nix
index 0e53eaec7c0..c74de8d6bd6 100644
--- a/pkgs/development/python-modules/oauth/default.nix
+++ b/pkgs/development/python-modules/oauth/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/oauth2/default.nix b/pkgs/development/python-modules/oauth2/default.nix
index 70b2e94e37c..d9c0ae505f7 100644
--- a/pkgs/development/python-modules/oauth2/default.nix
+++ b/pkgs/development/python-modules/oauth2/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , httplib2
diff --git a/pkgs/development/python-modules/oauthlib/3.1.nix b/pkgs/development/python-modules/oauthlib/3.1.nix
index 40501733e4c..10757812037 100644
--- a/pkgs/development/python-modules/oauthlib/3.1.nix
+++ b/pkgs/development/python-modules/oauthlib/3.1.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , mock
diff --git a/pkgs/development/python-modules/oauthlib/default.nix b/pkgs/development/python-modules/oauthlib/default.nix
index df65547a256..5c4cbc78adb 100644
--- a/pkgs/development/python-modules/oauthlib/default.nix
+++ b/pkgs/development/python-modules/oauthlib/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 , mock
diff --git a/pkgs/development/python-modules/obfsproxy/default.nix b/pkgs/development/python-modules/obfsproxy/default.nix
index 1dec57cafb4..b5736851fbb 100644
--- a/pkgs/development/python-modules/obfsproxy/default.nix
+++ b/pkgs/development/python-modules/obfsproxy/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchgit
 , pyptlib
diff --git a/pkgs/development/python-modules/objgraph/default.nix b/pkgs/development/python-modules/objgraph/default.nix
index 8bb119bcb4b..c79b11252be 100644
--- a/pkgs/development/python-modules/objgraph/default.nix
+++ b/pkgs/development/python-modules/objgraph/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPyPy
diff --git a/pkgs/development/python-modules/offtrac/default.nix b/pkgs/development/python-modules/offtrac/default.nix
index edec161a133..1ae555ffa15 100644
--- a/pkgs/development/python-modules/offtrac/default.nix
+++ b/pkgs/development/python-modules/offtrac/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/ofxclient/default.nix b/pkgs/development/python-modules/ofxclient/default.nix
index 5ef7060b7f6..72e2be7c78b 100644
--- a/pkgs/development/python-modules/ofxclient/default.nix
+++ b/pkgs/development/python-modules/ofxclient/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi,
+{ lib, buildPythonPackage, fetchPypi,
  ofxhome, ofxparse, beautifulsoup4, lxml, keyring
 }:
 
diff --git a/pkgs/development/python-modules/ofxhome/default.nix b/pkgs/development/python-modules/ofxhome/default.nix
index d9a28da1806..72ca65ed171 100644
--- a/pkgs/development/python-modules/ofxhome/default.nix
+++ b/pkgs/development/python-modules/ofxhome/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, nose }:
+{ lib, buildPythonPackage, fetchPypi, nose }:
 
 buildPythonPackage rec {
   version = "0.3.3";
diff --git a/pkgs/development/python-modules/ofxparse/default.nix b/pkgs/development/python-modules/ofxparse/default.nix
index 235875eec7c..d018a924d89 100644
--- a/pkgs/development/python-modules/ofxparse/default.nix
+++ b/pkgs/development/python-modules/ofxparse/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , six
diff --git a/pkgs/development/python-modules/ofxtools/default.nix b/pkgs/development/python-modules/ofxtools/default.nix
index 8f280d1cfd4..a32b0b23294 100644
--- a/pkgs/development/python-modules/ofxtools/default.nix
+++ b/pkgs/development/python-modules/ofxtools/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 , nose
diff --git a/pkgs/development/python-modules/olefile/default.nix b/pkgs/development/python-modules/olefile/default.nix
index 96c0a0b51be..d2c39e54ef4 100644
--- a/pkgs/development/python-modules/olefile/default.nix
+++ b/pkgs/development/python-modules/olefile/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 buildPythonPackage rec {
   pname = "olefile";
   version = "0.46";
diff --git a/pkgs/development/python-modules/omegaconf/default.nix b/pkgs/development/python-modules/omegaconf/default.nix
index 99b9cccc7de..ad9da46243b 100644
--- a/pkgs/development/python-modules/omegaconf/default.nix
+++ b/pkgs/development/python-modules/omegaconf/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub, pythonOlder
+{ lib, buildPythonPackage, fetchFromGitHub, pythonOlder
 , pytest, pytestrunner, pyyaml, six, pathlib2, isPy27 }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/onkyo-eiscp/default.nix b/pkgs/development/python-modules/onkyo-eiscp/default.nix
index 067db3a69fe..08770678432 100644
--- a/pkgs/development/python-modules/onkyo-eiscp/default.nix
+++ b/pkgs/development/python-modules/onkyo-eiscp/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , docopt, netifaces }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/openant/default.nix b/pkgs/development/python-modules/openant/default.nix
index 374b7cb059d..71f699e0552 100644
--- a/pkgs/development/python-modules/openant/default.nix
+++ b/pkgs/development/python-modules/openant/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 , pyusb
diff --git a/pkgs/development/python-modules/openbabel-bindings/default.nix b/pkgs/development/python-modules/openbabel-bindings/default.nix
index 18a6a8dd032..6488b8fad2f 100644
--- a/pkgs/development/python-modules/openbabel-bindings/default.nix
+++ b/pkgs/development/python-modules/openbabel-bindings/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, openbabel, python, buildPythonPackage }:
+{ lib, openbabel, python, buildPythonPackage }:
 
 buildPythonPackage rec {
   pname = "openbabel";
diff --git a/pkgs/development/python-modules/openidc-client/default.nix b/pkgs/development/python-modules/openidc-client/default.nix
index 7d373c13a8a..ce6ccee9793 100644
--- a/pkgs/development/python-modules/openidc-client/default.nix
+++ b/pkgs/development/python-modules/openidc-client/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, requests }:
+{ lib, buildPythonPackage, fetchPypi, requests }:
 
 buildPythonPackage rec {
   pname = "openidc-client";
diff --git a/pkgs/development/python-modules/openrazer/common.nix b/pkgs/development/python-modules/openrazer/common.nix
index 843380ebf21..2ed723944dd 100644
--- a/pkgs/development/python-modules/openrazer/common.nix
+++ b/pkgs/development/python-modules/openrazer/common.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , fetchFromGitHub
 }: rec {
   version = "2.9.0";
diff --git a/pkgs/development/python-modules/openrazer/daemon.nix b/pkgs/development/python-modules/openrazer/daemon.nix
index 6c22d3bae5d..8b1ff86fcab 100644
--- a/pkgs/development/python-modules/openrazer/daemon.nix
+++ b/pkgs/development/python-modules/openrazer/daemon.nix
@@ -11,12 +11,11 @@
 , pygobject3
 , pyudev
 , setproctitle
-, stdenv
 , wrapGAppsHook
 }:
 
 let
-  common = import ./common.nix { inherit stdenv lib fetchFromGitHub; };
+  common = import ./common.nix { inherit lib fetchFromGitHub; };
 in
 buildPythonApplication (common // rec {
   pname = "openrazer_daemon";
diff --git a/pkgs/development/python-modules/openrazer/pylib.nix b/pkgs/development/python-modules/openrazer/pylib.nix
index 52fe63318a3..fb83d64c502 100644
--- a/pkgs/development/python-modules/openrazer/pylib.nix
+++ b/pkgs/development/python-modules/openrazer/pylib.nix
@@ -3,12 +3,11 @@
 , dbus-python
 , fetchFromGitHub
 , numpy
-, stdenv
 , openrazer-daemon
 }:
 
 let
-  common = import ./common.nix { inherit stdenv lib fetchFromGitHub; };
+  common = import ./common.nix { inherit lib fetchFromGitHub; };
 in
 buildPythonPackage (common // rec {
   pname = "openrazer";
diff --git a/pkgs/development/python-modules/ordereddict/default.nix b/pkgs/development/python-modules/ordereddict/default.nix
index e2931840a66..6ef00640585 100644
--- a/pkgs/development/python-modules/ordereddict/default.nix
+++ b/pkgs/development/python-modules/ordereddict/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/orderedmultidict/default.nix b/pkgs/development/python-modules/orderedmultidict/default.nix
index 1cd0f648bd3..7c37cc7aa5a 100644
--- a/pkgs/development/python-modules/orderedmultidict/default.nix
+++ b/pkgs/development/python-modules/orderedmultidict/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, flake8, six, pythonOlder, importlib-metadata }:
+{ lib, buildPythonPackage, fetchPypi, flake8, six, pythonOlder, importlib-metadata }:
 
 buildPythonPackage rec {
   pname = "orderedmultidict";
diff --git a/pkgs/development/python-modules/orderedset/default.nix b/pkgs/development/python-modules/orderedset/default.nix
index aced6cf0853..db9c265ef3e 100644
--- a/pkgs/development/python-modules/orderedset/default.nix
+++ b/pkgs/development/python-modules/orderedset/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "orderedset";
diff --git a/pkgs/development/python-modules/osc/default.nix b/pkgs/development/python-modules/osc/default.nix
index dad78727f2d..ac7e401bf6c 100644
--- a/pkgs/development/python-modules/osc/default.nix
+++ b/pkgs/development/python-modules/osc/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub, bashInteractive, urlgrabber
+{ lib, buildPythonPackage, fetchFromGitHub, bashInteractive, urlgrabber
 , m2crypto, rpm, chardet
 }:
 
diff --git a/pkgs/development/python-modules/osmnx/default.nix b/pkgs/development/python-modules/osmnx/default.nix
index c624e262cf9..e1c22ddbfa3 100755
--- a/pkgs/development/python-modules/osmnx/default.nix
+++ b/pkgs/development/python-modules/osmnx/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub, geopandas, descartes, matplotlib, networkx, numpy
+{ lib, buildPythonPackage, fetchFromGitHub, geopandas, descartes, matplotlib, networkx, numpy
 , pandas, requests, Rtree, shapely, pytest, coverage, coveralls, folium, scikitlearn, scipy}:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/packaging/2.nix b/pkgs/development/python-modules/packaging/2.nix
index 5d841eb4fb1..a9b4e159469 100644
--- a/pkgs/development/python-modules/packaging/2.nix
+++ b/pkgs/development/python-modules/packaging/2.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pyparsing
diff --git a/pkgs/development/python-modules/packaging/default.nix b/pkgs/development/python-modules/packaging/default.nix
index 973e516f5a9..689c2e4516d 100644
--- a/pkgs/development/python-modules/packaging/default.nix
+++ b/pkgs/development/python-modules/packaging/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pyparsing
diff --git a/pkgs/development/python-modules/pagelabels/default.nix b/pkgs/development/python-modules/pagelabels/default.nix
index 5daa60f475d..c17f0ad60dd 100644
--- a/pkgs/development/python-modules/pagelabels/default.nix
+++ b/pkgs/development/python-modules/pagelabels/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, pdfrw }:
+{ lib, buildPythonPackage, fetchPypi, pdfrw }:
 
 buildPythonPackage rec {
   pname = "pagelabels";
diff --git a/pkgs/development/python-modules/pagerduty/default.nix b/pkgs/development/python-modules/pagerduty/default.nix
index ebe2c8b5854..8390cceb2fc 100644
--- a/pkgs/development/python-modules/pagerduty/default.nix
+++ b/pkgs/development/python-modules/pagerduty/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy3k
diff --git a/pkgs/development/python-modules/palettable/default.nix b/pkgs/development/python-modules/palettable/default.nix
index d61973aa3bf..dce72bb74bb 100644
--- a/pkgs/development/python-modules/palettable/default.nix
+++ b/pkgs/development/python-modules/palettable/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, pytest }:
+{ lib, buildPythonPackage, fetchPypi, pytest }:
 
 buildPythonPackage rec {
   pname = "palettable";
diff --git a/pkgs/development/python-modules/pamqp/default.nix b/pkgs/development/python-modules/pamqp/default.nix
index 2e8e4500f24..6df8b5491c9 100644
--- a/pkgs/development/python-modules/pamqp/default.nix
+++ b/pkgs/development/python-modules/pamqp/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , mock
diff --git a/pkgs/development/python-modules/pandas-datareader/default.nix b/pkgs/development/python-modules/pandas-datareader/default.nix
index c4bf9c140df..ea0ba44e99d 100644
--- a/pkgs/development/python-modules/pandas-datareader/default.nix
+++ b/pkgs/development/python-modules/pandas-datareader/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pytestCheckHook
diff --git a/pkgs/development/python-modules/pandocfilters/default.nix b/pkgs/development/python-modules/pandocfilters/default.nix
index d31bc2657c9..8ca57440b3f 100644
--- a/pkgs/development/python-modules/pandocfilters/default.nix
+++ b/pkgs/development/python-modules/pandocfilters/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/paperspace/default.nix b/pkgs/development/python-modules/paperspace/default.nix
index 4553b253819..86dbffd76b7 100644
--- a/pkgs/development/python-modules/paperspace/default.nix
+++ b/pkgs/development/python-modules/paperspace/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage
+{ lib, fetchPypi, buildPythonPackage
 , boto3, requests, gradient_statsd, terminaltables
 , click-completion , click-didyoumean, click-help-colors
 , colorama, requests_toolbelt, gradient_sdk, progressbar2
diff --git a/pkgs/development/python-modules/parameterized/default.nix b/pkgs/development/python-modules/parameterized/default.nix
index 16925bd1286..207a6a38bd5 100644
--- a/pkgs/development/python-modules/parameterized/default.nix
+++ b/pkgs/development/python-modules/parameterized/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage, nose, mock, glibcLocales, isPy3k, isPy38 }:
+{ lib, fetchPypi, buildPythonPackage, nose, mock, glibcLocales, isPy3k, isPy38 }:
 
 buildPythonPackage rec {
   pname = "parameterized";
diff --git a/pkgs/development/python-modules/paramz/default.nix b/pkgs/development/python-modules/paramz/default.nix
index 65cc79745ca..99065aa1994 100644
--- a/pkgs/development/python-modules/paramz/default.nix
+++ b/pkgs/development/python-modules/paramz/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, numpy, scipy, six, decorator, nose }:
+{ lib, buildPythonPackage, fetchPypi, numpy, scipy, six, decorator, nose }:
 
 buildPythonPackage rec {
   pname = "paramz";
diff --git a/pkgs/development/python-modules/parse-type/default.nix b/pkgs/development/python-modules/parse-type/default.nix
index d338a351e54..decb15ff5e6 100644
--- a/pkgs/development/python-modules/parse-type/default.nix
+++ b/pkgs/development/python-modules/parse-type/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi
+{ lib, fetchPypi
 , buildPythonPackage, pythonOlder
 , pytest, pytestrunner
 , parse, six, enum34
diff --git a/pkgs/development/python-modules/parse/default.nix b/pkgs/development/python-modules/parse/default.nix
index d72e607bc41..c5c0c1d7ae6 100644
--- a/pkgs/development/python-modules/parse/default.nix
+++ b/pkgs/development/python-modules/parse/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi
+{ lib, fetchPypi
 , buildPythonPackage, python
 }:
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/parsedatetime/default.nix b/pkgs/development/python-modules/parsedatetime/default.nix
index 1f98940fff0..77196a7c0e9 100644
--- a/pkgs/development/python-modules/parsedatetime/default.nix
+++ b/pkgs/development/python-modules/parsedatetime/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy27
diff --git a/pkgs/development/python-modules/parsimonious/default.nix b/pkgs/development/python-modules/parsimonious/default.nix
index d41953246db..557e632f2ed 100644
--- a/pkgs/development/python-modules/parsimonious/default.nix
+++ b/pkgs/development/python-modules/parsimonious/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , nose
diff --git a/pkgs/development/python-modules/paste/default.nix b/pkgs/development/python-modules/paste/default.nix
index a29deed503e..533a4dc3a30 100644
--- a/pkgs/development/python-modules/paste/default.nix
+++ b/pkgs/development/python-modules/paste/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , six
diff --git a/pkgs/development/python-modules/pastedeploy/default.nix b/pkgs/development/python-modules/pastedeploy/default.nix
index 950b232fa7e..672708b0fd9 100644
--- a/pkgs/development/python-modules/pastedeploy/default.nix
+++ b/pkgs/development/python-modules/pastedeploy/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pytestrunner
diff --git a/pkgs/development/python-modules/pastescript/default.nix b/pkgs/development/python-modules/pastescript/default.nix
index 57dbb7b9352..a526d383393 100644
--- a/pkgs/development/python-modules/pastescript/default.nix
+++ b/pkgs/development/python-modules/pastescript/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , nose
diff --git a/pkgs/development/python-modules/patator/default.nix b/pkgs/development/python-modules/patator/default.nix
index 96ed85d7bce..2f0a9b9b62b 100644
--- a/pkgs/development/python-modules/patator/default.nix
+++ b/pkgs/development/python-modules/patator/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, isPy27, fetchPypi
+{ lib, buildPythonPackage, isPy27, fetchPypi
 , paramiko, pycurl, ajpy, impacket, pyopenssl, cx_oracle, mysqlclient
 , psycopg2, pycrypto, dnspython, ipy, pysnmp, pyasn1, pysqlcipher3 }:
 
diff --git a/pkgs/development/python-modules/patch-ng/default.nix b/pkgs/development/python-modules/patch-ng/default.nix
index 981dc067fe7..126155722f4 100644
--- a/pkgs/development/python-modules/patch-ng/default.nix
+++ b/pkgs/development/python-modules/patch-ng/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/patch/default.nix b/pkgs/development/python-modules/patch/default.nix
index 8d7e78c6c27..ed11b3a4b52 100644
--- a/pkgs/development/python-modules/patch/default.nix
+++ b/pkgs/development/python-modules/patch/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchzip
 }:
diff --git a/pkgs/development/python-modules/path-and-address/default.nix b/pkgs/development/python-modules/path-and-address/default.nix
index 9512b0eb0b8..bd71ffad0f2 100644
--- a/pkgs/development/python-modules/path-and-address/default.nix
+++ b/pkgs/development/python-modules/path-and-address/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 , pytest
diff --git a/pkgs/development/python-modules/pathos/default.nix b/pkgs/development/python-modules/pathos/default.nix
index 77807090602..fd6bd238d1e 100644
--- a/pkgs/development/python-modules/pathos/default.nix
+++ b/pkgs/development/python-modules/pathos/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , dill
diff --git a/pkgs/development/python-modules/pathtools/default.nix b/pkgs/development/python-modules/pathtools/default.nix
index 57fff82a81d..86c2aeb88dc 100644
--- a/pkgs/development/python-modules/pathtools/default.nix
+++ b/pkgs/development/python-modules/pathtools/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/patool/default.nix b/pkgs/development/python-modules/patool/default.nix
index 1420597a1f3..2fa07d32ccb 100644
--- a/pkgs/development/python-modules/patool/default.nix
+++ b/pkgs/development/python-modules/patool/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, buildPythonPackage, fetchFromGitHub, pytestCheckHook, p7zip,
+{ lib, buildPythonPackage, fetchFromGitHub, pytestCheckHook, p7zip,
   unzip, cabextract, zip, zopfli, lzip, zpaq, gnutar, gnugrep, diffutils, file,
   gzip, bzip2, xz}:
 
diff --git a/pkgs/development/python-modules/paver/default.nix b/pkgs/development/python-modules/paver/default.nix
index 5d01df22b6d..8721ef3dd60 100644
--- a/pkgs/development/python-modules/paver/default.nix
+++ b/pkgs/development/python-modules/paver/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , nose
diff --git a/pkgs/development/python-modules/pbkdf2/default.nix b/pkgs/development/python-modules/pbkdf2/default.nix
index 18a2b9b95a3..8f489ca24b9 100644
--- a/pkgs/development/python-modules/pbkdf2/default.nix
+++ b/pkgs/development/python-modules/pbkdf2/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "pbkdf2";
diff --git a/pkgs/development/python-modules/pc-ble-driver-py/default.nix b/pkgs/development/python-modules/pc-ble-driver-py/default.nix
index 6a12eea1b00..bd6432db534 100644
--- a/pkgs/development/python-modules/pc-ble-driver-py/default.nix
+++ b/pkgs/development/python-modules/pc-ble-driver-py/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, cmake, git, swig, boost, udev, pc-ble-driver, pythonOlder
+{ lib, fetchFromGitHub, cmake, git, swig, boost, udev, pc-ble-driver, pythonOlder
 , buildPythonPackage, enum34, wrapt, future, setuptools, scikit-build, pythonAtLeast }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/pcpp/default.nix b/pkgs/development/python-modules/pcpp/default.nix
index aea7ff0fcda..704e979c2ca 100644
--- a/pkgs/development/python-modules/pcpp/default.nix
+++ b/pkgs/development/python-modules/pcpp/default.nix
@@ -1,6 +1,6 @@
 { buildPythonPackage
 , fetchFromGitHub
-, lib, stdenv
+, lib
 }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/pdf2image/default.nix b/pkgs/development/python-modules/pdf2image/default.nix
index adc43ef4c2e..4eddc028a25 100644
--- a/pkgs/development/python-modules/pdf2image/default.nix
+++ b/pkgs/development/python-modules/pdf2image/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, pillow, poppler_utils }:
+{ lib, buildPythonPackage, fetchPypi, pillow, poppler_utils }:
 
 buildPythonPackage rec {
   pname = "pdf2image";
diff --git a/pkgs/development/python-modules/pdfkit/default.nix b/pkgs/development/python-modules/pdfkit/default.nix
index 10bc09e8ca9..431f7f09796 100644
--- a/pkgs/development/python-modules/pdfkit/default.nix
+++ b/pkgs/development/python-modules/pdfkit/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/pdfminer_six/default.nix b/pkgs/development/python-modules/pdfminer_six/default.nix
index 9a659eebe33..96ba6686905 100644
--- a/pkgs/development/python-modules/pdfminer_six/default.nix
+++ b/pkgs/development/python-modules/pdfminer_six/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub, isPy3k, cryptography, chardet, nose, sortedcontainers }:
+{ lib, buildPythonPackage, fetchFromGitHub, isPy3k, cryptography, chardet, nose, sortedcontainers }:
 
 buildPythonPackage rec {
   pname = "pdfminer_six";
diff --git a/pkgs/development/python-modules/pdfposter/default.nix b/pkgs/development/python-modules/pdfposter/default.nix
index 0a21ed1e499..00cfea5cc9b 100644
--- a/pkgs/development/python-modules/pdfposter/default.nix
+++ b/pkgs/development/python-modules/pdfposter/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, pypdf2 }:
+{ lib, buildPythonPackage, fetchPypi, pypdf2 }:
 
 buildPythonPackage rec {
   pname = "pdftools.pdfposter";
diff --git a/pkgs/development/python-modules/pdfrw/default.nix b/pkgs/development/python-modules/pdfrw/default.nix
index 49abb3751c9..5cc619ef6a4 100644
--- a/pkgs/development/python-modules/pdfrw/default.nix
+++ b/pkgs/development/python-modules/pdfrw/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "pdfrw";
diff --git a/pkgs/development/python-modules/pdfx/default.nix b/pkgs/development/python-modules/pdfx/default.nix
index 97dee7e7570..a8c110fdba7 100644
--- a/pkgs/development/python-modules/pdfx/default.nix
+++ b/pkgs/development/python-modules/pdfx/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub, pdfminer, chardet, pytest }:
+{ lib, buildPythonPackage, fetchFromGitHub, pdfminer, chardet, pytest }:
 
 buildPythonPackage rec {
   pname = "pdfx";
diff --git a/pkgs/development/python-modules/pecan/default.nix b/pkgs/development/python-modules/pecan/default.nix
index ed0c89b7802..a66c4077c3c 100644
--- a/pkgs/development/python-modules/pecan/default.nix
+++ b/pkgs/development/python-modules/pecan/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , fetchPypi
 , buildPythonPackage
 , isPy27
diff --git a/pkgs/development/python-modules/pelican/default.nix b/pkgs/development/python-modules/pelican/default.nix
index 0b103b780c0..71bec7e42df 100644
--- a/pkgs/development/python-modules/pelican/default.nix
+++ b/pkgs/development/python-modules/pelican/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub, isPy27
+{ lib, buildPythonPackage, fetchFromGitHub, isPy27
 , glibcLocales, git
 , mock, nose, markdown, lxml, typogrify
 , jinja2, pygments, docutils, pytz, unidecode, six, dateutil, feedgenerator
diff --git a/pkgs/development/python-modules/pep257/default.nix b/pkgs/development/python-modules/pep257/default.nix
index 296b55eec12..e9cba70e631 100644
--- a/pkgs/development/python-modules/pep257/default.nix
+++ b/pkgs/development/python-modules/pep257/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchurl, pytest, mock }:
+{ lib, buildPythonPackage, fetchurl, pytest, mock }:
 buildPythonPackage rec {
   pname = "pep257";
   version = "0.7.0";
diff --git a/pkgs/development/python-modules/pep8/default.nix b/pkgs/development/python-modules/pep8/default.nix
index 8ef3bfea0f5..cc0e546b957 100644
--- a/pkgs/development/python-modules/pep8/default.nix
+++ b/pkgs/development/python-modules/pep8/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/peppercorn/default.nix b/pkgs/development/python-modules/peppercorn/default.nix
index 6caf61b0cd0..310cc565b21 100644
--- a/pkgs/development/python-modules/peppercorn/default.nix
+++ b/pkgs/development/python-modules/peppercorn/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/persisting-theory/default.nix b/pkgs/development/python-modules/persisting-theory/default.nix
index 86bae927d9f..6859b6264a8 100644
--- a/pkgs/development/python-modules/persisting-theory/default.nix
+++ b/pkgs/development/python-modules/persisting-theory/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , nose
 }:
 
diff --git a/pkgs/development/python-modules/pex/default.nix b/pkgs/development/python-modules/pex/default.nix
index 1d7de0088a8..e65f62c8ff7 100644
--- a/pkgs/development/python-modules/pex/default.nix
+++ b/pkgs/development/python-modules/pex/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , setuptools
diff --git a/pkgs/development/python-modules/pexif/default.nix b/pkgs/development/python-modules/pexif/default.nix
index 326dde176ae..a31d80eed05 100644
--- a/pkgs/development/python-modules/pexif/default.nix
+++ b/pkgs/development/python-modules/pexif/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/pg8000/1_12.nix b/pkgs/development/python-modules/pg8000/1_12.nix
index d84bb2014b8..e53817b3911 100644
--- a/pkgs/development/python-modules/pg8000/1_12.nix
+++ b/pkgs/development/python-modules/pg8000/1_12.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pytz
diff --git a/pkgs/development/python-modules/pg8000/default.nix b/pkgs/development/python-modules/pg8000/default.nix
index 8f63e00e799..9f9bb1702a9 100644
--- a/pkgs/development/python-modules/pg8000/default.nix
+++ b/pkgs/development/python-modules/pg8000/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , scramp
diff --git a/pkgs/development/python-modules/pgpdump/default.nix b/pkgs/development/python-modules/pgpdump/default.nix
index d795cc3678f..e952ced742c 100644
--- a/pkgs/development/python-modules/pgpdump/default.nix
+++ b/pkgs/development/python-modules/pgpdump/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/pgspecial/default.nix b/pkgs/development/python-modules/pgspecial/default.nix
index 796a3819881..476921da632 100644
--- a/pkgs/development/python-modules/pgspecial/default.nix
+++ b/pkgs/development/python-modules/pgspecial/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, pytest, psycopg2, click, sqlparse }:
+{ lib, buildPythonPackage, fetchPypi, pytest, psycopg2, click, sqlparse }:
 
 buildPythonPackage rec {
   pname = "pgspecial";
diff --git a/pkgs/development/python-modules/phe/default.nix b/pkgs/development/python-modules/phe/default.nix
index 5a00a4ccb09..86a5ec848ac 100644
--- a/pkgs/development/python-modules/phe/default.nix
+++ b/pkgs/development/python-modules/phe/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, isPyPy, isPy3k, click, gmpy2, numpy } :
+{ lib, buildPythonPackage, fetchPypi, isPyPy, isPy3k, click, gmpy2, numpy } :
 
 let
   pname = "phe";
diff --git a/pkgs/development/python-modules/phonopy/default.nix b/pkgs/development/python-modules/phonopy/default.nix
index 03e0c54caab..2259fcd7ba5 100644
--- a/pkgs/development/python-modules/phonopy/default.nix
+++ b/pkgs/development/python-modules/phonopy/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, python, fetchPypi, numpy, pyyaml, matplotlib, h5py, spglib, pytestCheckHook }:
+{ lib, buildPythonPackage, python, fetchPypi, numpy, pyyaml, matplotlib, h5py, spglib, pytestCheckHook }:
 
 buildPythonPackage rec {
   pname = "phonopy";
diff --git a/pkgs/development/python-modules/phx-class-registry/default.nix b/pkgs/development/python-modules/phx-class-registry/default.nix
index 9ed84e86371..94538dc6e74 100644
--- a/pkgs/development/python-modules/phx-class-registry/default.nix
+++ b/pkgs/development/python-modules/phx-class-registry/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, isPy27, pytestCheckHook }:
+{ lib, buildPythonPackage, fetchPypi, isPy27, pytestCheckHook }:
 
 buildPythonPackage rec {
   pname = "phx-class-registry";
diff --git a/pkgs/development/python-modules/pickleshare/default.nix b/pkgs/development/python-modules/pickleshare/default.nix
index 2151e13b960..34798cc3ee5 100644
--- a/pkgs/development/python-modules/pickleshare/default.nix
+++ b/pkgs/development/python-modules/pickleshare/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pathpy
diff --git a/pkgs/development/python-modules/pid/default.nix b/pkgs/development/python-modules/pid/default.nix
index 95aca29da5d..f4ce57b3a20 100644
--- a/pkgs/development/python-modules/pid/default.nix
+++ b/pkgs/development/python-modules/pid/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , nose
diff --git a/pkgs/development/python-modules/piep/default.nix b/pkgs/development/python-modules/piep/default.nix
index c4fd24d070e..aacd9e314cb 100644
--- a/pkgs/development/python-modules/piep/default.nix
+++ b/pkgs/development/python-modules/piep/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , nose
diff --git a/pkgs/development/python-modules/pika-pool/default.nix b/pkgs/development/python-modules/pika-pool/default.nix
index a36fcdf18bb..051fdef8fe7 100644
--- a/pkgs/development/python-modules/pika-pool/default.nix
+++ b/pkgs/development/python-modules/pika-pool/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , pika
 }:
 
diff --git a/pkgs/development/python-modules/pika/default.nix b/pkgs/development/python-modules/pika/default.nix
index ec8310bdb55..c1bfe5297d7 100644
--- a/pkgs/development/python-modules/pika/default.nix
+++ b/pkgs/development/python-modules/pika/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , nose
diff --git a/pkgs/development/python-modules/pikepdf/default.nix b/pkgs/development/python-modules/pikepdf/default.nix
index ff2a2ce4c5e..38efe0a49b0 100644
--- a/pkgs/development/python-modules/pikepdf/default.nix
+++ b/pkgs/development/python-modules/pikepdf/default.nix
@@ -18,7 +18,7 @@
 , qpdf
 , setuptools-scm-git-archive
 , setuptools_scm
-, lib, stdenv
+, lib
 }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/pilkit/default.nix b/pkgs/development/python-modules/pilkit/default.nix
index 4a3c682c122..bc21d6bf465 100644
--- a/pkgs/development/python-modules/pilkit/default.nix
+++ b/pkgs/development/python-modules/pilkit/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pillow
diff --git a/pkgs/development/python-modules/pillowfight/default.nix b/pkgs/development/python-modules/pillowfight/default.nix
index 9e23f69d19c..c022fdb988d 100644
--- a/pkgs/development/python-modules/pillowfight/default.nix
+++ b/pkgs/development/python-modules/pillowfight/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pillow
diff --git a/pkgs/development/python-modules/pims/default.nix b/pkgs/development/python-modules/pims/default.nix
index d2a5641acff..bfe4e2b9ea0 100644
--- a/pkgs/development/python-modules/pims/default.nix
+++ b/pkgs/development/python-modules/pims/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , slicerator
diff --git a/pkgs/development/python-modules/pivy/default.nix b/pkgs/development/python-modules/pivy/default.nix
index aae90d2f8b4..312c87ae544 100644
--- a/pkgs/development/python-modules/pivy/default.nix
+++ b/pkgs/development/python-modules/pivy/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub, pkgs, qtbase, qmake, soqt }:
+{ lib, buildPythonPackage, fetchFromGitHub, pkgs, qtbase, qmake, soqt }:
 
 buildPythonPackage rec {
   pname = "pivy";
diff --git a/pkgs/development/python-modules/pkginfo/default.nix b/pkgs/development/python-modules/pkginfo/default.nix
index dbf487c5d3a..5216ab17879 100644
--- a/pkgs/development/python-modules/pkginfo/default.nix
+++ b/pkgs/development/python-modules/pkginfo/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "pkginfo";
diff --git a/pkgs/development/python-modules/pkuseg/default.nix b/pkgs/development/python-modules/pkuseg/default.nix
index 8e3e301793a..1944ac5197c 100644
--- a/pkgs/development/python-modules/pkuseg/default.nix
+++ b/pkgs/development/python-modules/pkuseg/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy3k
diff --git a/pkgs/development/python-modules/plac/default.nix b/pkgs/development/python-modules/plac/default.nix
index 9e2c66d9d1e..9261133bc92 100644
--- a/pkgs/development/python-modules/plac/default.nix
+++ b/pkgs/development/python-modules/plac/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , python
diff --git a/pkgs/development/python-modules/pluginbase/default.nix b/pkgs/development/python-modules/pluginbase/default.nix
index 956ea1b720a..697717eeca6 100644
--- a/pkgs/development/python-modules/pluginbase/default.nix
+++ b/pkgs/development/python-modules/pluginbase/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage, pytest }:
+{ lib, fetchPypi, buildPythonPackage, pytest }:
 
 buildPythonPackage rec {
   version = "1.0.0";
diff --git a/pkgs/development/python-modules/plyvel/default.nix b/pkgs/development/python-modules/plyvel/default.nix
index d8537d68158..aa247c8e426 100644
--- a/pkgs/development/python-modules/plyvel/default.nix
+++ b/pkgs/development/python-modules/plyvel/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pkgs
diff --git a/pkgs/development/python-modules/pocket/default.nix b/pkgs/development/python-modules/pocket/default.nix
index 3599d3dec55..e5a2d464bde 100644
--- a/pkgs/development/python-modules/pocket/default.nix
+++ b/pkgs/development/python-modules/pocket/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , requests
diff --git a/pkgs/development/python-modules/polib/default.nix b/pkgs/development/python-modules/polib/default.nix
index f7c4e1139a8..00353ac0cca 100644
--- a/pkgs/development/python-modules/polib/default.nix
+++ b/pkgs/development/python-modules/polib/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "polib";
diff --git a/pkgs/development/python-modules/pomegranate/default.nix b/pkgs/development/python-modules/pomegranate/default.nix
index 7595730eb31..8f260ad8ccb 100644
--- a/pkgs/development/python-modules/pomegranate/default.nix
+++ b/pkgs/development/python-modules/pomegranate/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub, numpy, scipy, cython, networkx, joblib, nose, pyyaml }:
+{ lib, buildPythonPackage, fetchFromGitHub, numpy, scipy, cython, networkx, joblib, nose, pyyaml }:
 
 buildPythonPackage rec {
   pname = "pomegranate";
diff --git a/pkgs/development/python-modules/pony/default.nix b/pkgs/development/python-modules/pony/default.nix
index 7a734927ee1..03330c4cfec 100644
--- a/pkgs/development/python-modules/pony/default.nix
+++ b/pkgs/development/python-modules/pony/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python, buildPythonPackage, fetchPypi }:
+{ lib, python, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "pony";
diff --git a/pkgs/development/python-modules/pooch/default.nix b/pkgs/development/python-modules/pooch/default.nix
index 282239d9890..de0ba145828 100644
--- a/pkgs/development/python-modules/pooch/default.nix
+++ b/pkgs/development/python-modules/pooch/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , isPy27
 , fetchPypi
diff --git a/pkgs/development/python-modules/poppler-qt5/default.nix b/pkgs/development/python-modules/poppler-qt5/default.nix
index 4aaaea40677..e94a234dc1a 100644
--- a/pkgs/development/python-modules/poppler-qt5/default.nix
+++ b/pkgs/development/python-modules/poppler-qt5/default.nix
@@ -1,4 +1,4 @@
-{ buildPythonPackage, fetchPypi, lib, stdenv, sip, qtbase, pyqt5, poppler, pkg-config, fetchpatch
+{ buildPythonPackage, fetchPypi, lib, sip, qtbase, pyqt5, poppler, pkg-config, fetchpatch
 , substituteAll
 }:
 
diff --git a/pkgs/development/python-modules/portend/default.nix b/pkgs/development/python-modules/portend/default.nix
index 10b30d05fa3..1408f7ca905 100644
--- a/pkgs/development/python-modules/portend/default.nix
+++ b/pkgs/development/python-modules/portend/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , pytest, setuptools_scm, tempora, pytest-black, pytestcov }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/posix_ipc/default.nix b/pkgs/development/python-modules/posix_ipc/default.nix
index 2fb6128dc1b..59f4b4b707f 100644
--- a/pkgs/development/python-modules/posix_ipc/default.nix
+++ b/pkgs/development/python-modules/posix_ipc/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/potr/default.nix b/pkgs/development/python-modules/potr/default.nix
index 9f2774b9a60..671010bb900 100644
--- a/pkgs/development/python-modules/potr/default.nix
+++ b/pkgs/development/python-modules/potr/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage, pycrypto }:
+{ lib, fetchPypi, buildPythonPackage, pycrypto }:
 
 buildPythonPackage rec {
   pname = "python-potr";
diff --git a/pkgs/development/python-modules/power/default.nix b/pkgs/development/python-modules/power/default.nix
index d1998faf6b6..8f72553092e 100644
--- a/pkgs/development/python-modules/power/default.nix
+++ b/pkgs/development/python-modules/power/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/pox/default.nix b/pkgs/development/python-modules/pox/default.nix
index e7013154f99..24591824e07 100644
--- a/pkgs/development/python-modules/pox/default.nix
+++ b/pkgs/development/python-modules/pox/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/poyo/default.nix b/pkgs/development/python-modules/poyo/default.nix
index d600e46c6b4..b7963258f33 100644
--- a/pkgs/development/python-modules/poyo/default.nix
+++ b/pkgs/development/python-modules/poyo/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/ppscore/default.nix b/pkgs/development/python-modules/ppscore/default.nix
index 00542c6e90e..ad3a393a00d 100644
--- a/pkgs/development/python-modules/ppscore/default.nix
+++ b/pkgs/development/python-modules/ppscore/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 , isPy27
diff --git a/pkgs/development/python-modules/praw/6.3.nix b/pkgs/development/python-modules/praw/6.3.nix
index 00182eda037..3fc485c00ec 100644
--- a/pkgs/development/python-modules/praw/6.3.nix
+++ b/pkgs/development/python-modules/praw/6.3.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub
+{ lib, buildPythonPackage, fetchFromGitHub
 , betamax
 , betamax-serializers
 , betamax-matchers
diff --git a/pkgs/development/python-modules/praw/default.nix b/pkgs/development/python-modules/praw/default.nix
index 61b869e87fb..a4c048e9c9b 100644
--- a/pkgs/development/python-modules/praw/default.nix
+++ b/pkgs/development/python-modules/praw/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub
+{ lib, buildPythonPackage, fetchFromGitHub
 , betamax
 , betamax-serializers
 , betamax-matchers
diff --git a/pkgs/development/python-modules/prawcore/default.nix b/pkgs/development/python-modules/prawcore/default.nix
index 533c31d87ce..2b6eff885f9 100644
--- a/pkgs/development/python-modules/prawcore/default.nix
+++ b/pkgs/development/python-modules/prawcore/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, isPy27
+{ lib, buildPythonPackage, fetchPypi, isPy27
 , requests
 , testfixtures, mock, requests_toolbelt
 , betamax, betamax-serializers, betamax-matchers, pytest
diff --git a/pkgs/development/python-modules/preggy/default.nix b/pkgs/development/python-modules/preggy/default.nix
index a2144f303be..44be123335f 100644
--- a/pkgs/development/python-modules/preggy/default.nix
+++ b/pkgs/development/python-modules/preggy/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, six, unidecode, nose, yanc }:
+{ lib, buildPythonPackage, fetchPypi, six, unidecode, nose, yanc }:
 
 buildPythonPackage rec {
   pname = "preggy";
diff --git a/pkgs/development/python-modules/preshed/default.nix b/pkgs/development/python-modules/preshed/default.nix
index 5d75c95d770..767d5b867f0 100644
--- a/pkgs/development/python-modules/preshed/default.nix
+++ b/pkgs/development/python-modules/preshed/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , murmurhash
diff --git a/pkgs/development/python-modules/pretend/default.nix b/pkgs/development/python-modules/pretend/default.nix
index 4fe726591e6..87e0e6613b1 100644
--- a/pkgs/development/python-modules/pretend/default.nix
+++ b/pkgs/development/python-modules/pretend/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "pretend";
diff --git a/pkgs/development/python-modules/prettytable/1.nix b/pkgs/development/python-modules/prettytable/1.nix
index 5b7457af9bf..0bd18f0721f 100644
--- a/pkgs/development/python-modules/prettytable/1.nix
+++ b/pkgs/development/python-modules/prettytable/1.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , glibcLocales
diff --git a/pkgs/development/python-modules/prettytable/default.nix b/pkgs/development/python-modules/prettytable/default.nix
index 5a15cfd24eb..5463403dec7 100644
--- a/pkgs/development/python-modules/prettytable/default.nix
+++ b/pkgs/development/python-modules/prettytable/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , glibcLocales
diff --git a/pkgs/development/python-modules/proboscis/default.nix b/pkgs/development/python-modules/proboscis/default.nix
index 00905136716..a2a1d04ebe0 100644
--- a/pkgs/development/python-modules/proboscis/default.nix
+++ b/pkgs/development/python-modules/proboscis/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, nose }:
+{ lib, buildPythonPackage, fetchPypi, nose }:
 
 buildPythonPackage rec {
   pname = "proboscis";
diff --git a/pkgs/development/python-modules/process-tests/default.nix b/pkgs/development/python-modules/process-tests/default.nix
index 4b83205d723..abf175b5531 100644
--- a/pkgs/development/python-modules/process-tests/default.nix
+++ b/pkgs/development/python-modules/process-tests/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/proglog/default.nix b/pkgs/development/python-modules/proglog/default.nix
index 3f8c1104381..9839ea9dd23 100644
--- a/pkgs/development/python-modules/proglog/default.nix
+++ b/pkgs/development/python-modules/proglog/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage, tqdm }:
+{ lib, fetchPypi, buildPythonPackage, tqdm }:
 
 buildPythonPackage rec {
   pname = "proglog";
diff --git a/pkgs/development/python-modules/progress/default.nix b/pkgs/development/python-modules/progress/default.nix
index 2c5dbc1386e..fcc1a7a9229 100644
--- a/pkgs/development/python-modules/progress/default.nix
+++ b/pkgs/development/python-modules/progress/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , python
diff --git a/pkgs/development/python-modules/progressbar/default.nix b/pkgs/development/python-modules/progressbar/default.nix
index a1fdddd95db..68967ecf653 100644
--- a/pkgs/development/python-modules/progressbar/default.nix
+++ b/pkgs/development/python-modules/progressbar/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "progressbar";
diff --git a/pkgs/development/python-modules/progressbar2/default.nix b/pkgs/development/python-modules/progressbar2/default.nix
index cc3029ade64..b5c488c0838 100644
--- a/pkgs/development/python-modules/progressbar2/default.nix
+++ b/pkgs/development/python-modules/progressbar2/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , python
 , buildPythonPackage
 , fetchPypi
diff --git a/pkgs/development/python-modules/progressbar231/default.nix b/pkgs/development/python-modules/progressbar231/default.nix
index f8980647482..d421efde8aa 100644
--- a/pkgs/development/python-modules/progressbar231/default.nix
+++ b/pkgs/development/python-modules/progressbar231/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, isPy3k }:
+{ lib, buildPythonPackage, fetchPypi, isPy3k }:
 
 buildPythonPackage rec {
   pname = "progressbar231";
diff --git a/pkgs/development/python-modules/progressbar33/default.nix b/pkgs/development/python-modules/progressbar33/default.nix
index 0b53b83f5cc..a483a6001f0 100644
--- a/pkgs/development/python-modules/progressbar33/default.nix
+++ b/pkgs/development/python-modules/progressbar33/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "progressbar33";
diff --git a/pkgs/development/python-modules/proto-plus/default.nix b/pkgs/development/python-modules/proto-plus/default.nix
index 1cd732b19ae..cc9444098de 100644
--- a/pkgs/development/python-modules/proto-plus/default.nix
+++ b/pkgs/development/python-modules/proto-plus/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy3k
diff --git a/pkgs/development/python-modules/prov/default.nix b/pkgs/development/python-modules/prov/default.nix
index 9ab4cbf72bd..acee0f09b84 100644
--- a/pkgs/development/python-modules/prov/default.nix
+++ b/pkgs/development/python-modules/prov/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , lxml
diff --git a/pkgs/development/python-modules/ptable/default.nix b/pkgs/development/python-modules/ptable/default.nix
index ffa9bdacd2d..ae2ad58a1ac 100644
--- a/pkgs/development/python-modules/ptable/default.nix
+++ b/pkgs/development/python-modules/ptable/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub, nose }:
+{ lib, buildPythonPackage, fetchFromGitHub, nose }:
 
 buildPythonPackage {
   pname = "ptable";
diff --git a/pkgs/development/python-modules/ptest/default.nix b/pkgs/development/python-modules/ptest/default.nix
index c19780a4411..2a4180a4cbe 100644
--- a/pkgs/development/python-modules/ptest/default.nix
+++ b/pkgs/development/python-modules/ptest/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 }:
diff --git a/pkgs/development/python-modules/ptpython/default.nix b/pkgs/development/python-modules/ptpython/default.nix
index fd7b92692fc..2758c3a582f 100644
--- a/pkgs/development/python-modules/ptpython/default.nix
+++ b/pkgs/development/python-modules/ptpython/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, buildPythonPackage, pythonOlder, fetchPypi, prompt_toolkit, appdirs, docopt, jedi
+{ lib, buildPythonPackage, pythonOlder, fetchPypi, prompt_toolkit, appdirs, docopt, jedi
 , pygments, importlib-metadata, isPy3k }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/publicsuffix/default.nix b/pkgs/development/python-modules/publicsuffix/default.nix
index abac4fb3baa..997bc31c865 100644
--- a/pkgs/development/python-modules/publicsuffix/default.nix
+++ b/pkgs/development/python-modules/publicsuffix/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, isPy3k }:
+{ lib, buildPythonPackage, fetchPypi, isPy3k }:
 
 buildPythonPackage rec {
   pname = "publicsuffix";
diff --git a/pkgs/development/python-modules/publicsuffix2/default.nix b/pkgs/development/python-modules/publicsuffix2/default.nix
index 2d9bc73baa3..30a02ec2f0d 100644
--- a/pkgs/development/python-modules/publicsuffix2/default.nix
+++ b/pkgs/development/python-modules/publicsuffix2/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub, requests }:
+{ lib, buildPythonPackage, fetchFromGitHub, requests }:
 
 buildPythonPackage rec {
   pname = "publicsuffix2";
diff --git a/pkgs/development/python-modules/pudb/default.nix b/pkgs/development/python-modules/pudb/default.nix
index 0ee2a8470b5..db48fbf1e48 100644
--- a/pkgs/development/python-modules/pudb/default.nix
+++ b/pkgs/development/python-modules/pudb/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pygments
diff --git a/pkgs/development/python-modules/pure-pcapy3/default.nix b/pkgs/development/python-modules/pure-pcapy3/default.nix
index 9679cc593df..636cbaff71c 100644
--- a/pkgs/development/python-modules/pure-pcapy3/default.nix
+++ b/pkgs/development/python-modules/pure-pcapy3/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "pure-pcapy3";
diff --git a/pkgs/development/python-modules/purepng/default.nix b/pkgs/development/python-modules/purepng/default.nix
index 715b2ca6902..3615935b88e 100644
--- a/pkgs/development/python-modules/purepng/default.nix
+++ b/pkgs/development/python-modules/purepng/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , python
 , fetchFromGitHub
diff --git a/pkgs/development/python-modules/pushover/default.nix b/pkgs/development/python-modules/pushover/default.nix
index 1093f125a96..1ef14af135f 100644
--- a/pkgs/development/python-modules/pushover/default.nix
+++ b/pkgs/development/python-modules/pushover/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , requests }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/pvlib/default.nix b/pkgs/development/python-modules/pvlib/default.nix
index 006246e5836..3a93b36cb2b 100644
--- a/pkgs/development/python-modules/pvlib/default.nix
+++ b/pkgs/development/python-modules/pvlib/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, fetchpatch, pythonOlder, numpy, pandas, pytz, six
+{ lib, buildPythonPackage, fetchPypi, fetchpatch, pythonOlder, numpy, pandas, pytz, six
 , pytestCheckHook, flaky, mock, pytest-mock, requests }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/pweave/default.nix b/pkgs/development/python-modules/pweave/default.nix
index fe74fcece1c..1b8e1a3cc6f 100644
--- a/pkgs/development/python-modules/pweave/default.nix
+++ b/pkgs/development/python-modules/pweave/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , mock
diff --git a/pkgs/development/python-modules/pwntools/default.nix b/pkgs/development/python-modules/pwntools/default.nix
index 77f7859c6d4..a24e1d5db13 100644
--- a/pkgs/development/python-modules/pwntools/default.nix
+++ b/pkgs/development/python-modules/pwntools/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , debugger
 , fetchPypi
diff --git a/pkgs/development/python-modules/pxml/default.nix b/pkgs/development/python-modules/pxml/default.nix
index 57614089e66..21dc2f4abc4 100644
--- a/pkgs/development/python-modules/pxml/default.nix
+++ b/pkgs/development/python-modules/pxml/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , pythonAtLeast
 , isPy27
 , buildPythonPackage
diff --git a/pkgs/development/python-modules/py-radix/default.nix b/pkgs/development/python-modules/py-radix/default.nix
index fa057ae9925..18fff5ec97f 100644
--- a/pkgs/development/python-modules/py-radix/default.nix
+++ b/pkgs/development/python-modules/py-radix/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 , coverage
diff --git a/pkgs/development/python-modules/py/default.nix b/pkgs/development/python-modules/py/default.nix
index 4d2b77bb1f2..aa12deabb37 100644
--- a/pkgs/development/python-modules/py/default.nix
+++ b/pkgs/development/python-modules/py/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, setuptools_scm }:
+{ lib, buildPythonPackage, fetchPypi, setuptools_scm }:
 
 buildPythonPackage rec {
   pname = "py";
diff --git a/pkgs/development/python-modules/py3dns/default.nix b/pkgs/development/python-modules/py3dns/default.nix
index 1f7aeaf1e11..12297b9a6f7 100644
--- a/pkgs/development/python-modules/py3dns/default.nix
+++ b/pkgs/development/python-modules/py3dns/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/py3status/default.nix b/pkgs/development/python-modules/py3status/default.nix
index 71314a08eeb..bd0f179dc85 100644
--- a/pkgs/development/python-modules/py3status/default.nix
+++ b/pkgs/development/python-modules/py3status/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , requests
diff --git a/pkgs/development/python-modules/py4j/default.nix b/pkgs/development/python-modules/py4j/default.nix
index 588d7a32d22..8eb1649fcc5 100644
--- a/pkgs/development/python-modules/py4j/default.nix
+++ b/pkgs/development/python-modules/py4j/default.nix
@@ -1,4 +1,4 @@
-{ buildPythonPackage, fetchPypi, lib, stdenv }:
+{ buildPythonPackage, fetchPypi, lib }:
 
 buildPythonPackage rec {
   pname = "py4j";
diff --git a/pkgs/development/python-modules/pyGithub/default.nix b/pkgs/development/python-modules/pyGithub/default.nix
index f53cc45b9fe..c214b375ff3 100644
--- a/pkgs/development/python-modules/pyGithub/default.nix
+++ b/pkgs/development/python-modules/pyGithub/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , cryptography
 , deprecated
diff --git a/pkgs/development/python-modules/py_scrypt/default.nix b/pkgs/development/python-modules/py_scrypt/default.nix
index af86ce3821e..b5ae4193f18 100644
--- a/pkgs/development/python-modules/py_scrypt/default.nix
+++ b/pkgs/development/python-modules/py_scrypt/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , openssl
diff --git a/pkgs/development/python-modules/pyacoustid/default.nix b/pkgs/development/python-modules/pyacoustid/default.nix
index d424b214429..5bebb1d5bc7 100644
--- a/pkgs/development/python-modules/pyacoustid/default.nix
+++ b/pkgs/development/python-modules/pyacoustid/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , requests
diff --git a/pkgs/development/python-modules/pyalgotrade/default.nix b/pkgs/development/python-modules/pyalgotrade/default.nix
index 075103e9e40..680a8f6f830 100644
--- a/pkgs/development/python-modules/pyalgotrade/default.nix
+++ b/pkgs/development/python-modules/pyalgotrade/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , matplotlib
diff --git a/pkgs/development/python-modules/pyamf/default.nix b/pkgs/development/python-modules/pyamf/default.nix
index f0cf111a87a..cebb1cc3f0b 100644
--- a/pkgs/development/python-modules/pyamf/default.nix
+++ b/pkgs/development/python-modules/pyamf/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage, isPy3k, defusedxml }:
+{ lib, fetchPypi, buildPythonPackage, isPy3k, defusedxml }:
 
 buildPythonPackage rec {
   pname = "PyAMF";
diff --git a/pkgs/development/python-modules/pyannotate/default.nix b/pkgs/development/python-modules/pyannotate/default.nix
index 9c9c18a886e..332a4161fe7 100644
--- a/pkgs/development/python-modules/pyannotate/default.nix
+++ b/pkgs/development/python-modules/pyannotate/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pythonOlder
diff --git a/pkgs/development/python-modules/pyasn1-modules/default.nix b/pkgs/development/python-modules/pyasn1-modules/default.nix
index 2be2e8b9c11..4bb515e17aa 100644
--- a/pkgs/development/python-modules/pyasn1-modules/default.nix
+++ b/pkgs/development/python-modules/pyasn1-modules/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pyasn1
diff --git a/pkgs/development/python-modules/pyasn1/default.nix b/pkgs/development/python-modules/pyasn1/default.nix
index 9b269f79c86..a0037d64683 100644
--- a/pkgs/development/python-modules/pyasn1/default.nix
+++ b/pkgs/development/python-modules/pyasn1/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, }:
+{ lib, buildPythonPackage, fetchPypi, }:
 
 buildPythonPackage rec {
   pname = "pyasn1";
diff --git a/pkgs/development/python-modules/pyatv/default.nix b/pkgs/development/python-modules/pyatv/default.nix
index 187f94dbd77..9e4f872e6f2 100644
--- a/pkgs/development/python-modules/pyatv/default.nix
+++ b/pkgs/development/python-modules/pyatv/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage
+{ lib, buildPythonPackage
 , aiohttp
 , aiozeroconf
 , asynctest
diff --git a/pkgs/development/python-modules/pyaudio/default.nix b/pkgs/development/python-modules/pyaudio/default.nix
index d88dc7009b7..e937b8759f6 100644
--- a/pkgs/development/python-modules/pyaudio/default.nix
+++ b/pkgs/development/python-modules/pyaudio/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPyPy
diff --git a/pkgs/development/python-modules/pyaxmlparser/default.nix b/pkgs/development/python-modules/pyaxmlparser/default.nix
index 63e180b11b2..e77c6dda840 100644
--- a/pkgs/development/python-modules/pyaxmlparser/default.nix
+++ b/pkgs/development/python-modules/pyaxmlparser/default.nix
@@ -1,4 +1,4 @@
-{ buildPythonPackage, lib, stdenv, lxml, click, fetchFromGitHub, pytest, isPy3k }:
+{ buildPythonPackage, lib, lxml, click, fetchFromGitHub, pytest, isPy3k }:
 
 buildPythonPackage rec {
   version = "0.3.24";
diff --git a/pkgs/development/python-modules/pybase64/default.nix b/pkgs/development/python-modules/pybase64/default.nix
index e462d53fea8..aa65d7ccadf 100644
--- a/pkgs/development/python-modules/pybase64/default.nix
+++ b/pkgs/development/python-modules/pybase64/default.nix
@@ -1,4 +1,4 @@
-{ buildPythonPackage, isPy3k, lib, stdenv, fetchPypi, six, pytest }:
+{ buildPythonPackage, isPy3k, lib, fetchPypi, six, pytest }:
 
 buildPythonPackage rec {
   pname = "pybase64";
diff --git a/pkgs/development/python-modules/pybindgen/default.nix b/pkgs/development/python-modules/pybindgen/default.nix
index 4b6f7f1682f..9e8174f9b7f 100644
--- a/pkgs/development/python-modules/pybindgen/default.nix
+++ b/pkgs/development/python-modules/pybindgen/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage, isPy3k, setuptools_scm, pygccxml }:
+{ lib, fetchPypi, buildPythonPackage, isPy3k, setuptools_scm, pygccxml }:
 buildPythonPackage rec {
   pname = "PyBindGen";
   version = "0.21.0";
diff --git a/pkgs/development/python-modules/pyblosxom/default.nix b/pkgs/development/python-modules/pyblosxom/default.nix
index dee6aea559a..77e47eb9836 100644
--- a/pkgs/development/python-modules/pyblosxom/default.nix
+++ b/pkgs/development/python-modules/pyblosxom/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchurl
 , pygments
diff --git a/pkgs/development/python-modules/pybluez/default.nix b/pkgs/development/python-modules/pybluez/default.nix
index a02861c68cd..1cd7d91ef25 100644
--- a/pkgs/development/python-modules/pybluez/default.nix
+++ b/pkgs/development/python-modules/pybluez/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 , pkgs
diff --git a/pkgs/development/python-modules/pybrowserid/default.nix b/pkgs/development/python-modules/pybrowserid/default.nix
index eacbd81055c..7517de59754 100644
--- a/pkgs/development/python-modules/pybrowserid/default.nix
+++ b/pkgs/development/python-modules/pybrowserid/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , requests, mock }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/pycallgraph/default.nix b/pkgs/development/python-modules/pycallgraph/default.nix
index 1353af406ca..af9f18aad2c 100644
--- a/pkgs/development/python-modules/pycallgraph/default.nix
+++ b/pkgs/development/python-modules/pycallgraph/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pytest
diff --git a/pkgs/development/python-modules/pycangjie/default.nix b/pkgs/development/python-modules/pycangjie/default.nix
index 6fc9d2af1cb..1f7ccde2576 100644
--- a/pkgs/development/python-modules/pycangjie/default.nix
+++ b/pkgs/development/python-modules/pycangjie/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, bash, autoconf, automake, libtool, pkg-config, libcangjie
+{ lib, fetchurl, bash, autoconf, automake, libtool, pkg-config, libcangjie
 , sqlite, buildPythonPackage, cython
 }:
 
diff --git a/pkgs/development/python-modules/pycapnp/default.nix b/pkgs/development/python-modules/pycapnp/default.nix
index ab9088cf1e5..7e8954e04d0 100644
--- a/pkgs/development/python-modules/pycapnp/default.nix
+++ b/pkgs/development/python-modules/pycapnp/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , capnproto
 , cython
diff --git a/pkgs/development/python-modules/pycarddav/default.nix b/pkgs/development/python-modules/pycarddav/default.nix
index 7885cf65b83..b3479695a89 100644
--- a/pkgs/development/python-modules/pycarddav/default.nix
+++ b/pkgs/development/python-modules/pycarddav/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy3k
diff --git a/pkgs/development/python-modules/pycares/default.nix b/pkgs/development/python-modules/pycares/default.nix
index 8404063ac1f..9b3ec94babc 100644
--- a/pkgs/development/python-modules/pycares/default.nix
+++ b/pkgs/development/python-modules/pycares/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , python
diff --git a/pkgs/development/python-modules/pychart/default.nix b/pkgs/development/python-modules/pychart/default.nix
index 2c2399fca92..f020361474a 100644
--- a/pkgs/development/python-modules/pychart/default.nix
+++ b/pkgs/development/python-modules/pychart/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, isPy27 }:
+{ lib, buildPythonPackage, fetchPypi, isPy27 }:
 
 buildPythonPackage rec {
   pname = "pychart";
diff --git a/pkgs/development/python-modules/pychef/default.nix b/pkgs/development/python-modules/pychef/default.nix
index 1702cde840c..ddd7dec820d 100644
--- a/pkgs/development/python-modules/pychef/default.nix
+++ b/pkgs/development/python-modules/pychef/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , six
diff --git a/pkgs/development/python-modules/pyclipper/default.nix b/pkgs/development/python-modules/pyclipper/default.nix
index e8938954709..27a2a1d8084 100644
--- a/pkgs/development/python-modules/pyclipper/default.nix
+++ b/pkgs/development/python-modules/pyclipper/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , fetchPypi
 , buildPythonPackage
 , setuptools_scm
diff --git a/pkgs/development/python-modules/pycm/default.nix b/pkgs/development/python-modules/pycm/default.nix
index ada4eeeb556..8e0a9e3b152 100644
--- a/pkgs/development/python-modules/pycm/default.nix
+++ b/pkgs/development/python-modules/pycm/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub, isPy3k, numpy, pytest }:
+{ lib, buildPythonPackage, fetchFromGitHub, isPy3k, numpy, pytest }:
 
 buildPythonPackage rec {
   pname = "pycm";
diff --git a/pkgs/development/python-modules/pycoin/default.nix b/pkgs/development/python-modules/pycoin/default.nix
index a21c8f6f549..d42cfcadfee 100644
--- a/pkgs/development/python-modules/pycoin/default.nix
+++ b/pkgs/development/python-modules/pycoin/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , fetchPypi
 , buildPythonPackage
 , gnupg
diff --git a/pkgs/development/python-modules/pycollada/default.nix b/pkgs/development/python-modules/pycollada/default.nix
index 4b177012f4e..e8e0809c022 100644
--- a/pkgs/development/python-modules/pycollada/default.nix
+++ b/pkgs/development/python-modules/pycollada/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage, numpy, dateutil }:
+{ lib, fetchPypi, buildPythonPackage, numpy, dateutil }:
 
 buildPythonPackage rec {
   pname = "pycollada";
diff --git a/pkgs/development/python-modules/pycontracts/default.nix b/pkgs/development/python-modules/pycontracts/default.nix
index 0b511e024dc..2a90bef7256 100644
--- a/pkgs/development/python-modules/pycontracts/default.nix
+++ b/pkgs/development/python-modules/pycontracts/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , nose, pyparsing, decorator, six, future }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/pycountry/default.nix b/pkgs/development/python-modules/pycountry/default.nix
index b402e909240..525a5610711 100644
--- a/pkgs/development/python-modules/pycountry/default.nix
+++ b/pkgs/development/python-modules/pycountry/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 ,
diff --git a/pkgs/development/python-modules/pycparser/default.nix b/pkgs/development/python-modules/pycparser/default.nix
index a246ce53a1e..5fe7cab1cdb 100644
--- a/pkgs/development/python-modules/pycparser/default.nix
+++ b/pkgs/development/python-modules/pycparser/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, python }:
+{ lib, buildPythonPackage, fetchPypi, python }:
 
 buildPythonPackage rec {
   pname = "pycparser";
diff --git a/pkgs/development/python-modules/pycryptopp/default.nix b/pkgs/development/python-modules/pycryptopp/default.nix
index 0f17d9e59a8..7079cde0d59 100644
--- a/pkgs/development/python-modules/pycryptopp/default.nix
+++ b/pkgs/development/python-modules/pycryptopp/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , fetchpatch
diff --git a/pkgs/development/python-modules/pydenticon/default.nix b/pkgs/development/python-modules/pydenticon/default.nix
index 763cfb9b845..44913e1de47 100644
--- a/pkgs/development/python-modules/pydenticon/default.nix
+++ b/pkgs/development/python-modules/pydenticon/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pillow
diff --git a/pkgs/development/python-modules/pydicom/default.nix b/pkgs/development/python-modules/pydicom/default.nix
index 08c5f099d28..be3cddc7c14 100644
--- a/pkgs/development/python-modules/pydicom/default.nix
+++ b/pkgs/development/python-modules/pydicom/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 , isPy27
diff --git a/pkgs/development/python-modules/pydispatcher/default.nix b/pkgs/development/python-modules/pydispatcher/default.nix
index d132fad7313..d949b16d105 100644
--- a/pkgs/development/python-modules/pydispatcher/default.nix
+++ b/pkgs/development/python-modules/pydispatcher/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pytest
diff --git a/pkgs/development/python-modules/pydns/default.nix b/pkgs/development/python-modules/pydns/default.nix
index a93820bfaef..a6fb07c1520 100644
--- a/pkgs/development/python-modules/pydns/default.nix
+++ b/pkgs/development/python-modules/pydns/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/pyechonest/default.nix b/pkgs/development/python-modules/pyechonest/default.nix
index 10ade4fa2ca..83820629552 100644
--- a/pkgs/development/python-modules/pyechonest/default.nix
+++ b/pkgs/development/python-modules/pyechonest/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, isPy3k }:
+{ lib, buildPythonPackage, fetchPypi, isPy3k }:
 
 buildPythonPackage rec {
   pname = "pyechonest";
diff --git a/pkgs/development/python-modules/pyee/default.nix b/pkgs/development/python-modules/pyee/default.nix
index 712db3e8712..7e388b93971 100644
--- a/pkgs/development/python-modules/pyee/default.nix
+++ b/pkgs/development/python-modules/pyee/default.nix
@@ -1,4 +1,4 @@
-{ buildPythonPackage, fetchPypi, lib, vcversioner, pytestrunner, mock, pytest, pytest-asyncio, pytest-trio, twisted, zipp, pyparsing, pyhamcrest, futures, attrs, stdenv, isPy27 }:
+{ buildPythonPackage, fetchPypi, lib, vcversioner, pytestrunner, mock, pytest, pytest-asyncio, pytest-trio, twisted, zipp, pyparsing, pyhamcrest, futures, attrs, isPy27 }:
 
 buildPythonPackage rec {
   pname = "pyee";
diff --git a/pkgs/development/python-modules/pyemd/default.nix b/pkgs/development/python-modules/pyemd/default.nix
index 4e7594fbab5..c7b277a6098 100644
--- a/pkgs/development/python-modules/pyemd/default.nix
+++ b/pkgs/development/python-modules/pyemd/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, numpy, cython }:
+{ lib, buildPythonPackage, fetchPypi, numpy, cython }:
 
 buildPythonPackage rec {
   pname = "pyemd";
diff --git a/pkgs/development/python-modules/pyexcelerator/default.nix b/pkgs/development/python-modules/pyexcelerator/default.nix
index 37388507394..b3a376616d3 100644
--- a/pkgs/development/python-modules/pyexcelerator/default.nix
+++ b/pkgs/development/python-modules/pyexcelerator/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy3k
diff --git a/pkgs/development/python-modules/pyext/default.nix b/pkgs/development/python-modules/pyext/default.nix
index befbd3c2de1..eb88bf78586 100644
--- a/pkgs/development/python-modules/pyext/default.nix
+++ b/pkgs/development/python-modules/pyext/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub }:
+{ lib, buildPythonPackage, fetchFromGitHub }:
 
 buildPythonPackage {
     pname = "pyext";
diff --git a/pkgs/development/python-modules/pyfantom/default.nix b/pkgs/development/python-modules/pyfantom/default.nix
index a17388b34b5..d7c77e763e7 100644
--- a/pkgs/development/python-modules/pyfantom/default.nix
+++ b/pkgs/development/python-modules/pyfantom/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchgit
 }:
diff --git a/pkgs/development/python-modules/pyfftw/default.nix b/pkgs/development/python-modules/pyfftw/default.nix
index ff66dc8f867..155254a6af3 100644
--- a/pkgs/development/python-modules/pyfftw/default.nix
+++ b/pkgs/development/python-modules/pyfftw/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , fftw, fftwFloat, fftwLongDouble, numpy, scipy, cython, dask }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/pyfiglet/default.nix b/pkgs/development/python-modules/pyfiglet/default.nix
index a4fe9ec9dfe..e9671e03cb3 100644
--- a/pkgs/development/python-modules/pyfiglet/default.nix
+++ b/pkgs/development/python-modules/pyfiglet/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   version = "0.8.post1";
diff --git a/pkgs/development/python-modules/pyflakes/default.nix b/pkgs/development/python-modules/pyflakes/default.nix
index 2ff88a78a4e..cf1b8878183 100644
--- a/pkgs/development/python-modules/pyflakes/default.nix
+++ b/pkgs/development/python-modules/pyflakes/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, pythonOlder, unittest2 }:
+{ lib, buildPythonPackage, fetchPypi, pythonOlder, unittest2 }:
 
 buildPythonPackage rec {
   pname = "pyflakes";
diff --git a/pkgs/development/python-modules/pyftpdlib/default.nix b/pkgs/development/python-modules/pyftpdlib/default.nix
index 5d0d72eb495..b3aa456c4a9 100644
--- a/pkgs/development/python-modules/pyftpdlib/default.nix
+++ b/pkgs/development/python-modules/pyftpdlib/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , mock
diff --git a/pkgs/development/python-modules/pyfttt/default.nix b/pkgs/development/python-modules/pyfttt/default.nix
index 8648ad4f876..c8b52fce409 100644
--- a/pkgs/development/python-modules/pyfttt/default.nix
+++ b/pkgs/development/python-modules/pyfttt/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , requests }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/pygal/default.nix b/pkgs/development/python-modules/pygal/default.nix
index 6855c9e4f02..ec4cff2de61 100644
--- a/pkgs/development/python-modules/pygal/default.nix
+++ b/pkgs/development/python-modules/pygal/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , fetchpatch
diff --git a/pkgs/development/python-modules/pygame_sdl2/default.nix b/pkgs/development/python-modules/pygame_sdl2/default.nix
index afca3dd7bc1..00965b4a149 100644
--- a/pkgs/development/python-modules/pygame_sdl2/default.nix
+++ b/pkgs/development/python-modules/pygame_sdl2/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchurl, isPy27
+{ lib, buildPythonPackage, fetchurl, isPy27
 , cython, SDL2, SDL2_image, SDL2_ttf, SDL2_mixer, libjpeg, libpng }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/pygccxml/default.nix b/pkgs/development/python-modules/pygccxml/default.nix
index a1a6b0222b8..7e06b27a23f 100644
--- a/pkgs/development/python-modules/pygccxml/default.nix
+++ b/pkgs/development/python-modules/pygccxml/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, castxml, fetchFromGitHub, buildPythonPackage,
+{ lib, castxml, fetchFromGitHub, buildPythonPackage,
 llvmPackages }:
 buildPythonPackage rec {
   pname = "pygccxml";
diff --git a/pkgs/development/python-modules/pygeoip/default.nix b/pkgs/development/python-modules/pygeoip/default.nix
index 7aa16ac1e9a..b9b588d669a 100644
--- a/pkgs/development/python-modules/pygeoip/default.nix
+++ b/pkgs/development/python-modules/pygeoip/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , nose }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/pygments-better-html/default.nix b/pkgs/development/python-modules/pygments-better-html/default.nix
index 2e5d6271c66..152e9463b0e 100644
--- a/pkgs/development/python-modules/pygments-better-html/default.nix
+++ b/pkgs/development/python-modules/pygments-better-html/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pygments
diff --git a/pkgs/development/python-modules/pygments-markdown-lexer/default.nix b/pkgs/development/python-modules/pygments-markdown-lexer/default.nix
index 31a6b043494..0a88e34005c 100644
--- a/pkgs/development/python-modules/pygments-markdown-lexer/default.nix
+++ b/pkgs/development/python-modules/pygments-markdown-lexer/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pygments
diff --git a/pkgs/development/python-modules/pygpgme/default.nix b/pkgs/development/python-modules/pygpgme/default.nix
index 416410ab3ce..29be02751bb 100644
--- a/pkgs/development/python-modules/pygpgme/default.nix
+++ b/pkgs/development/python-modules/pygpgme/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchurl, isPyPy
+{ lib, buildPythonPackage, fetchurl, isPyPy
 , gpgme }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/pygraphviz/default.nix b/pkgs/development/python-modules/pygraphviz/default.nix
index f239647bafa..e9b66a95771 100644
--- a/pkgs/development/python-modules/pygraphviz/default.nix
+++ b/pkgs/development/python-modules/pygraphviz/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, isPy3k, fetchPypi, substituteAll, graphviz
+{ lib, buildPythonPackage, isPy3k, fetchPypi, substituteAll, graphviz
 , pkg-config, doctest-ignore-unicode, mock, nose }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/pygreat/default.nix b/pkgs/development/python-modules/pygreat/default.nix
index 20a96d1f8f2..92526b465b1 100644
--- a/pkgs/development/python-modules/pygreat/default.nix
+++ b/pkgs/development/python-modules/pygreat/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, isPy3k, fetchFromGitHub, future, pyusb }:
+{ lib, buildPythonPackage, isPy3k, fetchFromGitHub, future, pyusb }:
 
 buildPythonPackage {
   pname = "pygreat";
diff --git a/pkgs/development/python-modules/pygrok/default.nix b/pkgs/development/python-modules/pygrok/default.nix
index 8f694a117fe..56d8b05af9a 100644
--- a/pkgs/development/python-modules/pygrok/default.nix
+++ b/pkgs/development/python-modules/pygrok/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, buildPythonPackage, fetchFromGitHub, regex, pytest }:
+{ lib, buildPythonPackage, fetchFromGitHub, regex, pytest }:
 
 buildPythonPackage rec {
   pname = "pygrok";
diff --git a/pkgs/development/python-modules/pyhamcrest/1.nix b/pkgs/development/python-modules/pyhamcrest/1.nix
index 5df52d9b658..4c2ec4df681 100644
--- a/pkgs/development/python-modules/pyhamcrest/1.nix
+++ b/pkgs/development/python-modules/pyhamcrest/1.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , mock, pytest
 , six
 }:
diff --git a/pkgs/development/python-modules/pyhamcrest/default.nix b/pkgs/development/python-modules/pyhamcrest/default.nix
index a66e26b1319..fd6ba2f2df9 100644
--- a/pkgs/development/python-modules/pyhamcrest/default.nix
+++ b/pkgs/development/python-modules/pyhamcrest/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , mock, pytest
 , six
 }:
diff --git a/pkgs/development/python-modules/pyhomematic/default.nix b/pkgs/development/python-modules/pyhomematic/default.nix
index 502d648b400..65d3f60da04 100644
--- a/pkgs/development/python-modules/pyhomematic/default.nix
+++ b/pkgs/development/python-modules/pyhomematic/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, isPy3k, fetchPypi }:
+{ lib, buildPythonPackage, isPy3k, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "pyhomematic";
diff --git a/pkgs/development/python-modules/pyicu/default.nix b/pkgs/development/python-modules/pyicu/default.nix
index 3512e33c81d..e152002cdd1 100644
--- a/pkgs/development/python-modules/pyicu/default.nix
+++ b/pkgs/development/python-modules/pyicu/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pytest
diff --git a/pkgs/development/python-modules/pyinotify/default.nix b/pkgs/development/python-modules/pyinotify/default.nix
index 92c2f5bb671..e5714ec1800 100644
--- a/pkgs/development/python-modules/pyinotify/default.nix
+++ b/pkgs/development/python-modules/pyinotify/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/pyinputevent/default.nix b/pkgs/development/python-modules/pyinputevent/default.nix
index a52a0bb4001..1d4f4cfa784 100644
--- a/pkgs/development/python-modules/pyinputevent/default.nix
+++ b/pkgs/development/python-modules/pyinputevent/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 }:
diff --git a/pkgs/development/python-modules/pykdtree/default.nix b/pkgs/development/python-modules/pykdtree/default.nix
index f37ddb2483e..3161548f8b5 100644
--- a/pkgs/development/python-modules/pykdtree/default.nix
+++ b/pkgs/development/python-modules/pykdtree/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, numpy, nose, openmp }:
+{ lib, buildPythonPackage, fetchPypi, numpy, nose, openmp }:
 
 buildPythonPackage rec {
   pname = "pykdtree";
diff --git a/pkgs/development/python-modules/pykerberos/default.nix b/pkgs/development/python-modules/pykerberos/default.nix
index 07a32a25a0c..13d7a4fd248 100644
--- a/pkgs/development/python-modules/pykerberos/default.nix
+++ b/pkgs/development/python-modules/pykerberos/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage, krb5 }:
+{ lib, fetchPypi, buildPythonPackage, krb5 }:
 
 buildPythonPackage rec {
   pname = "pykerberos";
diff --git a/pkgs/development/python-modules/pykickstart/default.nix b/pkgs/development/python-modules/pykickstart/default.nix
index bc10295e232..8b1eefdafed 100644
--- a/pkgs/development/python-modules/pykickstart/default.nix
+++ b/pkgs/development/python-modules/pykickstart/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchurl
 , urlgrabber
diff --git a/pkgs/development/python-modules/pylast/default.nix b/pkgs/development/python-modules/pylast/default.nix
index 707554be559..26812ff9151 100644
--- a/pkgs/development/python-modules/pylast/default.nix
+++ b/pkgs/development/python-modules/pylast/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, isPy3k, certifi, six
+{ lib, buildPythonPackage, fetchPypi, isPy3k, certifi, six
 , setuptools_scm
 }:
 
diff --git a/pkgs/development/python-modules/pylibconfig2/default.nix b/pkgs/development/python-modules/pylibconfig2/default.nix
index 25989d0353e..2cabb78544e 100644
--- a/pkgs/development/python-modules/pylibconfig2/default.nix
+++ b/pkgs/development/python-modules/pylibconfig2/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, pyparsing }:
+{ lib, buildPythonPackage, fetchPypi, pyparsing }:
 buildPythonPackage rec {
   pname = "pylibconfig2";
   version = "0.2.5";
diff --git a/pkgs/development/python-modules/pyliblo/default.nix b/pkgs/development/python-modules/pyliblo/default.nix
index 454f08fd10e..64f8e62c286 100644
--- a/pkgs/development/python-modules/pyliblo/default.nix
+++ b/pkgs/development/python-modules/pyliblo/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchurl
 , isPyPy
diff --git a/pkgs/development/python-modules/pylibmc/default.nix b/pkgs/development/python-modules/pylibmc/default.nix
index 8bb62c09134..9fb8401bdc4 100644
--- a/pkgs/development/python-modules/pylibmc/default.nix
+++ b/pkgs/development/python-modules/pylibmc/default.nix
@@ -1,4 +1,4 @@
-{ buildPythonPackage, fetchPypi, lib, stdenv, libmemcached, zlib, cyrus_sasl }:
+{ buildPythonPackage, fetchPypi, lib, libmemcached, zlib, cyrus_sasl }:
 
 buildPythonPackage rec {
   version = "1.6.1";
diff --git a/pkgs/development/python-modules/pymaging/default.nix b/pkgs/development/python-modules/pymaging/default.nix
index 3b35ce3e716..8869924bddb 100644
--- a/pkgs/development/python-modules/pymaging/default.nix
+++ b/pkgs/development/python-modules/pymaging/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 }:
diff --git a/pkgs/development/python-modules/pymaging_png/default.nix b/pkgs/development/python-modules/pymaging_png/default.nix
index 64ea5b4ff5b..6d12ddd4006 100644
--- a/pkgs/development/python-modules/pymaging_png/default.nix
+++ b/pkgs/development/python-modules/pymaging_png/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 , pymaging
diff --git a/pkgs/development/python-modules/pymatgen/default.nix b/pkgs/development/python-modules/pymatgen/default.nix
index 84fcdbef6a3..bae7a561323 100644
--- a/pkgs/development/python-modules/pymatgen/default.nix
+++ b/pkgs/development/python-modules/pymatgen/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , enum34
 , glibcLocales
 , matplotlib
diff --git a/pkgs/development/python-modules/pymeeus/default.nix b/pkgs/development/python-modules/pymeeus/default.nix
index 96fb9d6f694..13e80a38e4b 100644
--- a/pkgs/development/python-modules/pymeeus/default.nix
+++ b/pkgs/development/python-modules/pymeeus/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, pytest }:
+{ lib, buildPythonPackage, fetchPypi, pytest }:
 
 buildPythonPackage rec {
   pname = "PyMeeus";
diff --git a/pkgs/development/python-modules/pymemoize/default.nix b/pkgs/development/python-modules/pymemoize/default.nix
index b44ff9fef49..f66a6ef702b 100644
--- a/pkgs/development/python-modules/pymemoize/default.nix
+++ b/pkgs/development/python-modules/pymemoize/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , django
diff --git a/pkgs/development/python-modules/pymetar/default.nix b/pkgs/development/python-modules/pymetar/default.nix
index 84139091ae4..72a17f27dca 100644
--- a/pkgs/development/python-modules/pymetar/default.nix
+++ b/pkgs/development/python-modules/pymetar/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python, buildPythonPackage, isPy3k, fetchPypi }:
+{ lib, python, buildPythonPackage, isPy3k, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "pymetar";
diff --git a/pkgs/development/python-modules/pymetno/default.nix b/pkgs/development/python-modules/pymetno/default.nix
index 2b10e2f164f..b3d91c595d8 100644
--- a/pkgs/development/python-modules/pymetno/default.nix
+++ b/pkgs/development/python-modules/pymetno/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 , aiohttp
diff --git a/pkgs/development/python-modules/pymsgbox/default.nix b/pkgs/development/python-modules/pymsgbox/default.nix
index d69c0011ac5..84ab3dcab1b 100644
--- a/pkgs/development/python-modules/pymsgbox/default.nix
+++ b/pkgs/development/python-modules/pymsgbox/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage, tkinter }:
+{ lib, fetchPypi, buildPythonPackage, tkinter }:
 
 buildPythonPackage rec {
   pname = "PyMsgBox";
diff --git a/pkgs/development/python-modules/pymupdf/default.nix b/pkgs/development/python-modules/pymupdf/default.nix
index 8ce7d5a19c6..501f829dc14 100644
--- a/pkgs/development/python-modules/pymupdf/default.nix
+++ b/pkgs/development/python-modules/pymupdf/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, mupdf, swig }:
+{ lib, buildPythonPackage, fetchPypi, mupdf, swig }:
 buildPythonPackage rec {
   pname = "pymupdf";
   version = "1.18.0";
diff --git a/pkgs/development/python-modules/pymysqlsa/default.nix b/pkgs/development/python-modules/pymysqlsa/default.nix
index 6009b03e508..49b5a49193d 100644
--- a/pkgs/development/python-modules/pymysqlsa/default.nix
+++ b/pkgs/development/python-modules/pymysqlsa/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pymysql
diff --git a/pkgs/development/python-modules/pynac/default.nix b/pkgs/development/python-modules/pynac/default.nix
index 656825a36bb..a6df8cb036d 100644
--- a/pkgs/development/python-modules/pynac/default.nix
+++ b/pkgs/development/python-modules/pynac/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchurl
 }:
diff --git a/pkgs/development/python-modules/pynacl/default.nix b/pkgs/development/python-modules/pynacl/default.nix
index be69bf3d802..37cf0a9ef10 100644
--- a/pkgs/development/python-modules/pynacl/default.nix
+++ b/pkgs/development/python-modules/pynacl/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pytest
diff --git a/pkgs/development/python-modules/pynest2d/default.nix b/pkgs/development/python-modules/pynest2d/default.nix
index 6214f3db42b..7ca72293382 100644
--- a/pkgs/development/python-modules/pynest2d/default.nix
+++ b/pkgs/development/python-modules/pynest2d/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub, python3, cmake
+{ lib, buildPythonPackage, fetchFromGitHub, python3, cmake
 , pythonOlder, libnest2d, sip, clipper }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/pynisher/default.nix b/pkgs/development/python-modules/pynisher/default.nix
index 0ecac704e1e..28e9922e172 100644
--- a/pkgs/development/python-modules/pynisher/default.nix
+++ b/pkgs/development/python-modules/pynisher/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, psutil, docutils }:
+{ lib, buildPythonPackage, fetchPypi, psutil, docutils }:
 
 buildPythonPackage rec {
   pname = "pynisher";
diff --git a/pkgs/development/python-modules/pynzb/default.nix b/pkgs/development/python-modules/pynzb/default.nix
index 294c2374f53..3f1cca75dc1 100644
--- a/pkgs/development/python-modules/pynzb/default.nix
+++ b/pkgs/development/python-modules/pynzb/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , python
diff --git a/pkgs/development/python-modules/pyodbc/default.nix b/pkgs/development/python-modules/pyodbc/default.nix
index 2dec1d8705b..8f2686a7914 100644
--- a/pkgs/development/python-modules/pyodbc/default.nix
+++ b/pkgs/development/python-modules/pyodbc/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, isPyPy, unixODBC }:
+{ lib, buildPythonPackage, fetchPypi, isPyPy, unixODBC }:
 
 buildPythonPackage rec {
   pname = "pyodbc";
diff --git a/pkgs/development/python-modules/pyopencl/default.nix b/pkgs/development/python-modules/pyopencl/default.nix
index 4171eaeeb57..cf881a58048 100644
--- a/pkgs/development/python-modules/pyopencl/default.nix
+++ b/pkgs/development/python-modules/pyopencl/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , fetchPypi
 , buildPythonPackage
 , Mako
diff --git a/pkgs/development/python-modules/pyopengl-accelerate/default.nix b/pkgs/development/python-modules/pyopengl-accelerate/default.nix
index 23de6b2323f..c6839bba989 100644
--- a/pkgs/development/python-modules/pyopengl-accelerate/default.nix
+++ b/pkgs/development/python-modules/pyopengl-accelerate/default.nix
@@ -1,7 +1,6 @@
-{ stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
-, lib
 }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/pypandoc/default.nix b/pkgs/development/python-modules/pypandoc/default.nix
index ffe7bf01423..c54e220228a 100644
--- a/pkgs/development/python-modules/pypandoc/default.nix
+++ b/pkgs/development/python-modules/pypandoc/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub, fetchpatch
+{ lib, buildPythonPackage, fetchFromGitHub, fetchpatch
 , pandoc, haskellPackages, texlive }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/pypdf/default.nix b/pkgs/development/python-modules/pypdf/default.nix
index d69b1078aee..1244f374b44 100644
--- a/pkgs/development/python-modules/pypdf/default.nix
+++ b/pkgs/development/python-modules/pypdf/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy3k
diff --git a/pkgs/development/python-modules/pypdf2/default.nix b/pkgs/development/python-modules/pypdf2/default.nix
index cd91cc347a4..26d27f4455a 100644
--- a/pkgs/development/python-modules/pypdf2/default.nix
+++ b/pkgs/development/python-modules/pypdf2/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , glibcLocales
diff --git a/pkgs/development/python-modules/pypeg2/default.nix b/pkgs/development/python-modules/pypeg2/default.nix
index 1f16a307a0c..8b630f743d1 100644
--- a/pkgs/development/python-modules/pypeg2/default.nix
+++ b/pkgs/development/python-modules/pypeg2/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy3k
diff --git a/pkgs/development/python-modules/pyphen/default.nix b/pkgs/development/python-modules/pyphen/default.nix
index d8b9abcf97a..2f573b67838 100644
--- a/pkgs/development/python-modules/pyphen/default.nix
+++ b/pkgs/development/python-modules/pyphen/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "Pyphen";
diff --git a/pkgs/development/python-modules/pypillowfight/default.nix b/pkgs/development/python-modules/pypillowfight/default.nix
index bc0e4535999..1fc4198ebeb 100644
--- a/pkgs/development/python-modules/pypillowfight/default.nix
+++ b/pkgs/development/python-modules/pypillowfight/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitLab, nose, pillow
+{ lib, buildPythonPackage, fetchFromGitLab, nose, pillow
 , isPy3k, isPyPy
 }:
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/pyplatec/default.nix b/pkgs/development/python-modules/pyplatec/default.nix
index 8747840fd7c..0c8c6c4328a 100644
--- a/pkgs/development/python-modules/pyplatec/default.nix
+++ b/pkgs/development/python-modules/pyplatec/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/pypoppler/default.nix b/pkgs/development/python-modules/pypoppler/default.nix
index 83190bc292a..348f9171502 100644
--- a/pkgs/development/python-modules/pypoppler/default.nix
+++ b/pkgs/development/python-modules/pypoppler/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy3k
diff --git a/pkgs/development/python-modules/pyprind/default.nix b/pkgs/development/python-modules/pyprind/default.nix
index d270136558f..9c13a953570 100644
--- a/pkgs/development/python-modules/pyprind/default.nix
+++ b/pkgs/development/python-modules/pyprind/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage
+{ lib, fetchPypi, buildPythonPackage
 , psutil
 , pytest }:
 
diff --git a/pkgs/development/python-modules/pyptlib/default.nix b/pkgs/development/python-modules/pyptlib/default.nix
index af2575d2143..9f9f99884b9 100644
--- a/pkgs/development/python-modules/pyptlib/default.nix
+++ b/pkgs/development/python-modules/pyptlib/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPyPy
diff --git a/pkgs/development/python-modules/pypugjs/default.nix b/pkgs/development/python-modules/pypugjs/default.nix
index b806177b4d7..22ac89cf6a9 100644
--- a/pkgs/development/python-modules/pypugjs/default.nix
+++ b/pkgs/development/python-modules/pypugjs/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, fetchpatch, six, chardet, nose
+{ lib, buildPythonPackage, fetchPypi, fetchpatch, six, chardet, nose
 , django, jinja2, tornado, pyramid, pyramid_mako, Mako }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/pyqtgraph/default.nix b/pkgs/development/python-modules/pyqtgraph/default.nix
index 98b30b24707..f43bfb9aaa6 100644
--- a/pkgs/development/python-modules/pyqtgraph/default.nix
+++ b/pkgs/development/python-modules/pyqtgraph/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , numpy
diff --git a/pkgs/development/python-modules/pyquery/default.nix b/pkgs/development/python-modules/pyquery/default.nix
index 2496d9d968f..2bb2eb1c6fc 100644
--- a/pkgs/development/python-modules/pyquery/default.nix
+++ b/pkgs/development/python-modules/pyquery/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , cssselect
diff --git a/pkgs/development/python-modules/pyramid/default.nix b/pkgs/development/python-modules/pyramid/default.nix
index 5f1e5c7d75a..44ac5a9221a 100644
--- a/pkgs/development/python-modules/pyramid/default.nix
+++ b/pkgs/development/python-modules/pyramid/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , webtest
diff --git a/pkgs/development/python-modules/pyramid_beaker/default.nix b/pkgs/development/python-modules/pyramid_beaker/default.nix
index 88dc62886fc..5c4e7c104bf 100644
--- a/pkgs/development/python-modules/pyramid_beaker/default.nix
+++ b/pkgs/development/python-modules/pyramid_beaker/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, pytest, beaker, pyramid }:
+{ lib, buildPythonPackage, fetchPypi, pytest, beaker, pyramid }:
 
 buildPythonPackage rec {
   pname = "pyramid_beaker";
diff --git a/pkgs/development/python-modules/pyramid_chameleon/default.nix b/pkgs/development/python-modules/pyramid_chameleon/default.nix
index 2bb5a03bdb9..d3388fdff35 100644
--- a/pkgs/development/python-modules/pyramid_chameleon/default.nix
+++ b/pkgs/development/python-modules/pyramid_chameleon/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , chameleon
diff --git a/pkgs/development/python-modules/pyramid_exclog/default.nix b/pkgs/development/python-modules/pyramid_exclog/default.nix
index 80514cc91b4..55da77f4964 100644
--- a/pkgs/development/python-modules/pyramid_exclog/default.nix
+++ b/pkgs/development/python-modules/pyramid_exclog/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pyramid
diff --git a/pkgs/development/python-modules/pyramid_hawkauth/default.nix b/pkgs/development/python-modules/pyramid_hawkauth/default.nix
index ab4025b7230..f2f156e98b6 100644
--- a/pkgs/development/python-modules/pyramid_hawkauth/default.nix
+++ b/pkgs/development/python-modules/pyramid_hawkauth/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 , pyramid
diff --git a/pkgs/development/python-modules/pyramid_jinja2/default.nix b/pkgs/development/python-modules/pyramid_jinja2/default.nix
index 0497ab79613..464d8d209bf 100644
--- a/pkgs/development/python-modules/pyramid_jinja2/default.nix
+++ b/pkgs/development/python-modules/pyramid_jinja2/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , webtest
diff --git a/pkgs/development/python-modules/pyramid_mako/default.nix b/pkgs/development/python-modules/pyramid_mako/default.nix
index 8c71563e2d7..2f8c5e1e075 100644
--- a/pkgs/development/python-modules/pyramid_mako/default.nix
+++ b/pkgs/development/python-modules/pyramid_mako/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , webtest
diff --git a/pkgs/development/python-modules/pyramid_multiauth/default.nix b/pkgs/development/python-modules/pyramid_multiauth/default.nix
index 9167918fc47..545883a25c1 100644
--- a/pkgs/development/python-modules/pyramid_multiauth/default.nix
+++ b/pkgs/development/python-modules/pyramid_multiauth/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pyramid
diff --git a/pkgs/development/python-modules/pyreport/default.nix b/pkgs/development/python-modules/pyreport/default.nix
index 09a1e7c6b41..6b9649699ba 100644
--- a/pkgs/development/python-modules/pyreport/default.nix
+++ b/pkgs/development/python-modules/pyreport/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy3k
diff --git a/pkgs/development/python-modules/pyres/default.nix b/pkgs/development/python-modules/pyres/default.nix
index 6d49bd02594..b1d5f4efb09 100644
--- a/pkgs/development/python-modules/pyres/default.nix
+++ b/pkgs/development/python-modules/pyres/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage, fetchFromGitHub, simplejson, redis, setproctitle, nose, pkgs }:
+{ lib, fetchPypi, buildPythonPackage, fetchFromGitHub, simplejson, redis, setproctitle, nose, pkgs }:
 
 let
 
diff --git a/pkgs/development/python-modules/pyrfc3339/default.nix b/pkgs/development/python-modules/pyrfc3339/default.nix
index f6be3c4c897..9885d4f5443 100644
--- a/pkgs/development/python-modules/pyrfc3339/default.nix
+++ b/pkgs/development/python-modules/pyrfc3339/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pytz
diff --git a/pkgs/development/python-modules/pyro4/default.nix b/pkgs/development/python-modules/pyro4/default.nix
index a84b22e0656..626560d89b6 100644
--- a/pkgs/development/python-modules/pyro4/default.nix
+++ b/pkgs/development/python-modules/pyro4/default.nix
@@ -1,7 +1,6 @@
-{ stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
-, lib
 , python
 , serpent
 , dill
diff --git a/pkgs/development/python-modules/pyroma/default.nix b/pkgs/development/python-modules/pyroma/default.nix
index e533f650169..bddf2413970 100644
--- a/pkgs/development/python-modules/pyroma/default.nix
+++ b/pkgs/development/python-modules/pyroma/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , docutils, pygments, setuptools
 }:
 
diff --git a/pkgs/development/python-modules/pyroute2/default.nix b/pkgs/development/python-modules/pyroute2/default.nix
index f2378863720..e5c87a94b07 100644
--- a/pkgs/development/python-modules/pyroute2/default.nix
+++ b/pkgs/development/python-modules/pyroute2/default.nix
@@ -1,4 +1,4 @@
-{lib, stdenv, buildPythonPackage, fetchPypi}:
+{lib, buildPythonPackage, fetchPypi}:
 
 buildPythonPackage rec {
   pname = "pyroute2";
diff --git a/pkgs/development/python-modules/pyrr/default.nix b/pkgs/development/python-modules/pyrr/default.nix
index f8ac5d8e867..cb1da523868 100644
--- a/pkgs/development/python-modules/pyrr/default.nix
+++ b/pkgs/development/python-modules/pyrr/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , setuptools
diff --git a/pkgs/development/python-modules/pyrsistent/default.nix b/pkgs/development/python-modules/pyrsistent/default.nix
index 211bc85f511..79f6666474e 100644
--- a/pkgs/development/python-modules/pyrsistent/default.nix
+++ b/pkgs/development/python-modules/pyrsistent/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy27
diff --git a/pkgs/development/python-modules/pyrss2gen/default.nix b/pkgs/development/python-modules/pyrss2gen/default.nix
index e3586e6dbf1..4a7dc788caa 100644
--- a/pkgs/development/python-modules/pyrss2gen/default.nix
+++ b/pkgs/development/python-modules/pyrss2gen/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/pysaml2/default.nix b/pkgs/development/python-modules/pysaml2/default.nix
index 7d2fdb5b426..2ffbb97223f 100644
--- a/pkgs/development/python-modules/pysaml2/default.nix
+++ b/pkgs/development/python-modules/pysaml2/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , isPy3k
 , fetchFromGitHub
diff --git a/pkgs/development/python-modules/pyscss/default.nix b/pkgs/development/python-modules/pyscss/default.nix
index 6da19bc48ab..e4e7791fa79 100644
--- a/pkgs/development/python-modules/pyscss/default.nix
+++ b/pkgs/development/python-modules/pyscss/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 , pytest
diff --git a/pkgs/development/python-modules/pysendfile/default.nix b/pkgs/development/python-modules/pysendfile/default.nix
index a35f2ae77f0..1a7c783e829 100644
--- a/pkgs/development/python-modules/pysendfile/default.nix
+++ b/pkgs/development/python-modules/pysendfile/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , python
diff --git a/pkgs/development/python-modules/pysensors/default.nix b/pkgs/development/python-modules/pysensors/default.nix
index 214412c4cee..8cff62b89c1 100644
--- a/pkgs/development/python-modules/pysensors/default.nix
+++ b/pkgs/development/python-modules/pysensors/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, python, fetchFromGitHub, lm_sensors }:
+{ lib, buildPythonPackage, python, fetchFromGitHub, lm_sensors }:
 buildPythonPackage {
   version = "2017-07-13";
   pname = "pysensors";
diff --git a/pkgs/development/python-modules/pyserial-asyncio/default.nix b/pkgs/development/python-modules/pyserial-asyncio/default.nix
index ff3d624490b..54f3f80a3f8 100644
--- a/pkgs/development/python-modules/pyserial-asyncio/default.nix
+++ b/pkgs/development/python-modules/pyserial-asyncio/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, isPy3k
+{ lib, buildPythonPackage, fetchPypi, isPy3k
 , pyserial }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/pysftp/default.nix b/pkgs/development/python-modules/pysftp/default.nix
index 28daf6b385e..3333a30bd1a 100644
--- a/pkgs/development/python-modules/pysftp/default.nix
+++ b/pkgs/development/python-modules/pysftp/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPyPy
diff --git a/pkgs/development/python-modules/pyshp/default.nix b/pkgs/development/python-modules/pyshp/default.nix
index 661c70a0ab2..7f494e98ad2 100644
--- a/pkgs/development/python-modules/pyshp/default.nix
+++ b/pkgs/development/python-modules/pyshp/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , setuptools }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/pysigset/default.nix b/pkgs/development/python-modules/pysigset/default.nix
index 8e31735db2e..ccacb412924 100644
--- a/pkgs/development/python-modules/pysigset/default.nix
+++ b/pkgs/development/python-modules/pysigset/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "pysigset";
diff --git a/pkgs/development/python-modules/pysmbc/default.nix b/pkgs/development/python-modules/pysmbc/default.nix
index 6834a78f428..bea1438f679 100644
--- a/pkgs/development/python-modules/pysmbc/default.nix
+++ b/pkgs/development/python-modules/pysmbc/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , samba, pkg-config
 , setuptools }:
 
diff --git a/pkgs/development/python-modules/pysmf/default.nix b/pkgs/development/python-modules/pysmf/default.nix
index 02559510100..25f5fc6a20c 100644
--- a/pkgs/development/python-modules/pysmf/default.nix
+++ b/pkgs/development/python-modules/pysmf/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, pkg-config, libsmf, glib, pytest }:
+{ lib, buildPythonPackage, fetchPypi, pkg-config, libsmf, glib, pytest }:
 
 buildPythonPackage rec {
   pname = "pysmf";
diff --git a/pkgs/development/python-modules/pysmi/default.nix b/pkgs/development/python-modules/pysmi/default.nix
index 953581aa302..7b96b97f0bb 100644
--- a/pkgs/development/python-modules/pysmi/default.nix
+++ b/pkgs/development/python-modules/pysmi/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , ply
diff --git a/pkgs/development/python-modules/pysnmp/default.nix b/pkgs/development/python-modules/pysnmp/default.nix
index 7dce4d9b4d1..0b0e298d5d0 100644
--- a/pkgs/development/python-modules/pysnmp/default.nix
+++ b/pkgs/development/python-modules/pysnmp/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pyasn1
diff --git a/pkgs/development/python-modules/pysocks/default.nix b/pkgs/development/python-modules/pysocks/default.nix
index 79c163726b7..70fb74ab4dd 100644
--- a/pkgs/development/python-modules/pysocks/default.nix
+++ b/pkgs/development/python-modules/pysocks/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/pyspark/default.nix b/pkgs/development/python-modules/pyspark/default.nix
index 342755131a3..f8a7c09b407 100644
--- a/pkgs/development/python-modules/pyspark/default.nix
+++ b/pkgs/development/python-modules/pyspark/default.nix
@@ -1,4 +1,4 @@
-{ buildPythonPackage, fetchPypi, lib, stdenv, py4j }:
+{ buildPythonPackage, fetchPypi, lib, py4j }:
 
 buildPythonPackage rec {
   pname = "pyspark";
diff --git a/pkgs/development/python-modules/pysqueezebox/default.nix b/pkgs/development/python-modules/pysqueezebox/default.nix
index 7c5d8ca5abf..8445f6d7e89 100644
--- a/pkgs/development/python-modules/pysqueezebox/default.nix
+++ b/pkgs/development/python-modules/pysqueezebox/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage, pythonOlder, aiohttp }:
+{ lib, fetchPypi, buildPythonPackage, pythonOlder, aiohttp }:
 
 buildPythonPackage rec {
   pname = "pysqueezebox";
diff --git a/pkgs/development/python-modules/pysrt/default.nix b/pkgs/development/python-modules/pysrt/default.nix
index 4012a732466..1099bffc40f 100644
--- a/pkgs/development/python-modules/pysrt/default.nix
+++ b/pkgs/development/python-modules/pysrt/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 , chardet
diff --git a/pkgs/development/python-modules/pyssim/default.nix b/pkgs/development/python-modules/pyssim/default.nix
index 4f73ada61af..cdbbfeabf88 100644
--- a/pkgs/development/python-modules/pyssim/default.nix
+++ b/pkgs/development/python-modules/pyssim/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub, numpy, scipy, pillow }:
+{ lib, buildPythonPackage, fetchFromGitHub, numpy, scipy, pillow }:
 
 buildPythonPackage rec {
   pname = "pyssim";
diff --git a/pkgs/development/python-modules/pystache/default.nix b/pkgs/development/python-modules/pystache/default.nix
index 6ed036aecb1..c93655e10a8 100644
--- a/pkgs/development/python-modules/pystache/default.nix
+++ b/pkgs/development/python-modules/pystache/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, python, fetchPypi, isPy3k, glibcLocales }:
+{ lib, buildPythonPackage, python, fetchPypi, isPy3k, glibcLocales }:
 
 buildPythonPackage rec {
   pname = "pystache";
diff --git a/pkgs/development/python-modules/pystemd/default.nix b/pkgs/development/python-modules/pystemd/default.nix
index 69186591949..e77dd605388 100644
--- a/pkgs/development/python-modules/pystemd/default.nix
+++ b/pkgs/development/python-modules/pystemd/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python, systemd }:
+{ lib, python, systemd }:
 
 python.pkgs.buildPythonPackage rec {
   pname = "pystemd";
diff --git a/pkgs/development/python-modules/pystemmer/default.nix b/pkgs/development/python-modules/pystemmer/default.nix
index 0ba23ffec5d..120867f389c 100644
--- a/pkgs/development/python-modules/pystemmer/default.nix
+++ b/pkgs/development/python-modules/pystemmer/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python, fetchPypi, buildPythonPackage, cython }:
+{ lib, python, fetchPypi, buildPythonPackage, cython }:
 
 buildPythonPackage rec {
   pname = "PyStemmer";
diff --git a/pkgs/development/python-modules/pytabix/default.nix b/pkgs/development/python-modules/pytabix/default.nix
index db8437d8957..fb2e622eac9 100644
--- a/pkgs/development/python-modules/pytabix/default.nix
+++ b/pkgs/development/python-modules/pytabix/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , isPy3k
 , fetchPypi
diff --git a/pkgs/development/python-modules/pytado/default.nix b/pkgs/development/python-modules/pytado/default.nix
index 636210c93d5..a54c89f348d 100644
--- a/pkgs/development/python-modules/pytado/default.nix
+++ b/pkgs/development/python-modules/pytado/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub }:
+{ lib, buildPythonPackage, fetchFromGitHub }:
 
 buildPythonPackage rec {
   pname = "PyTado";
diff --git a/pkgs/development/python-modules/pyte/default.nix b/pkgs/development/python-modules/pyte/default.nix
index 65d3d9218d0..e930f1d5717 100644
--- a/pkgs/development/python-modules/pyte/default.nix
+++ b/pkgs/development/python-modules/pyte/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, pytest, pytestrunner, wcwidth }:
+{ lib, buildPythonPackage, fetchPypi, pytest, pytestrunner, wcwidth }:
 
 buildPythonPackage rec {
   pname = "pyte";
diff --git a/pkgs/development/python-modules/pytest-aiohttp/default.nix b/pkgs/development/python-modules/pytest-aiohttp/default.nix
index 7384eb36070..fad9a70af0f 100644
--- a/pkgs/development/python-modules/pytest-aiohttp/default.nix
+++ b/pkgs/development/python-modules/pytest-aiohttp/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, pytest, aiohttp }:
+{ lib, buildPythonPackage, fetchPypi, pytest, aiohttp }:
 
 buildPythonPackage rec {
   pname = "pytest-aiohttp";
diff --git a/pkgs/development/python-modules/pytest-annotate/default.nix b/pkgs/development/python-modules/pytest-annotate/default.nix
index 1a7f77bf9b6..68b67f061bb 100644
--- a/pkgs/development/python-modules/pytest-annotate/default.nix
+++ b/pkgs/development/python-modules/pytest-annotate/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pyannotate
diff --git a/pkgs/development/python-modules/pytest-ansible/default.nix b/pkgs/development/python-modules/pytest-ansible/default.nix
index 309a33e8907..4ca6bdac6e9 100644
--- a/pkgs/development/python-modules/pytest-ansible/default.nix
+++ b/pkgs/development/python-modules/pytest-ansible/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 , ansible
diff --git a/pkgs/development/python-modules/pytest-asyncio/default.nix b/pkgs/development/python-modules/pytest-asyncio/default.nix
index c621d9a4785..0f37d09a9e0 100644
--- a/pkgs/development/python-modules/pytest-asyncio/default.nix
+++ b/pkgs/development/python-modules/pytest-asyncio/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, pytest, isPy3k, isPy35, async_generator }:
+{ lib, buildPythonPackage, fetchPypi, pytest, isPy3k, isPy35, async_generator }:
 buildPythonPackage rec {
   pname = "pytest-asyncio";
   version = "0.14.0";
diff --git a/pkgs/development/python-modules/pytest-bdd/default.nix b/pkgs/development/python-modules/pytest-bdd/default.nix
index 493a2307e7e..83757c2e166 100644
--- a/pkgs/development/python-modules/pytest-bdd/default.nix
+++ b/pkgs/development/python-modules/pytest-bdd/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub
+{ lib, buildPythonPackage, fetchFromGitHub
 , execnet
 , glob2
 , Mako
diff --git a/pkgs/development/python-modules/pytest-catchlog/default.nix b/pkgs/development/python-modules/pytest-catchlog/default.nix
index 2fb02244d1d..39c26a3e0f3 100644
--- a/pkgs/development/python-modules/pytest-catchlog/default.nix
+++ b/pkgs/development/python-modules/pytest-catchlog/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, pytest, unzip }:
+{ lib, buildPythonPackage, fetchPypi, pytest, unzip }:
 
 buildPythonPackage rec {
   pname = "pytest-catchlog";
diff --git a/pkgs/development/python-modules/pytest-celery/default.nix b/pkgs/development/python-modules/pytest-celery/default.nix
index 034c657b5b0..414cf1ecc9c 100644
--- a/pkgs/development/python-modules/pytest-celery/default.nix
+++ b/pkgs/development/python-modules/pytest-celery/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, pytest, setuptools_scm }:
+{ lib, buildPythonPackage, fetchPypi, pytest, setuptools_scm }:
 
 buildPythonPackage rec {
   pname = "pytest-celery";
diff --git a/pkgs/development/python-modules/pytest-check/default.nix b/pkgs/development/python-modules/pytest-check/default.nix
index 41f316a18a6..a0ae504746d 100644
--- a/pkgs/development/python-modules/pytest-check/default.nix
+++ b/pkgs/development/python-modules/pytest-check/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pytest
diff --git a/pkgs/development/python-modules/pytest-cov/default.nix b/pkgs/development/python-modules/pytest-cov/default.nix
index aa921ddeb3d..003d7e14ab5 100644
--- a/pkgs/development/python-modules/pytest-cov/default.nix
+++ b/pkgs/development/python-modules/pytest-cov/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , pytest, coverage }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/pytest-datadir/default.nix b/pkgs/development/python-modules/pytest-datadir/default.nix
index b1cdb1033a6..1dc218c0808 100644
--- a/pkgs/development/python-modules/pytest-datadir/default.nix
+++ b/pkgs/development/python-modules/pytest-datadir/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub
+{ lib, buildPythonPackage, fetchFromGitHub
 , setuptools_scm, pytest, cmake
 }:
 
diff --git a/pkgs/development/python-modules/pytest-datafiles/default.nix b/pkgs/development/python-modules/pytest-datafiles/default.nix
index bc6e2441b0f..bdcab2788ae 100644
--- a/pkgs/development/python-modules/pytest-datafiles/default.nix
+++ b/pkgs/development/python-modules/pytest-datafiles/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, py, pytest }:
+{ lib, buildPythonPackage, fetchPypi, py, pytest }:
 
 buildPythonPackage rec {
   pname = "pytest-datafiles";
diff --git a/pkgs/development/python-modules/pytest-dependency/default.nix b/pkgs/development/python-modules/pytest-dependency/default.nix
index 9a3dbed55b1..7108a8f4c17 100644
--- a/pkgs/development/python-modules/pytest-dependency/default.nix
+++ b/pkgs/development/python-modules/pytest-dependency/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, fetchpatch, pytest }:
+{ lib, buildPythonPackage, fetchPypi, fetchpatch, pytest }:
 
 buildPythonPackage rec {
   version = "0.5.1";
diff --git a/pkgs/development/python-modules/pytest-django/default.nix b/pkgs/development/python-modules/pytest-django/default.nix
index 069aa2812eb..bfcda812529 100644
--- a/pkgs/development/python-modules/pytest-django/default.nix
+++ b/pkgs/development/python-modules/pytest-django/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pytest
diff --git a/pkgs/development/python-modules/pytest-fixture-config/default.nix b/pkgs/development/python-modules/pytest-fixture-config/default.nix
index 061f62bfc17..32392f8f14c 100644
--- a/pkgs/development/python-modules/pytest-fixture-config/default.nix
+++ b/pkgs/development/python-modules/pytest-fixture-config/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , setuptools-git, pytest }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/pytest-flakes/default.nix b/pkgs/development/python-modules/pytest-flakes/default.nix
index fd4ed097806..805c19751ed 100644
--- a/pkgs/development/python-modules/pytest-flakes/default.nix
+++ b/pkgs/development/python-modules/pytest-flakes/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, pythonOlder
+{ lib, buildPythonPackage, fetchPypi, pythonOlder
 , pytest
 , pyflakes
 }:
diff --git a/pkgs/development/python-modules/pytest-flask/default.nix b/pkgs/development/python-modules/pytest-flask/default.nix
index 74e33a7731b..7b459b4a294 100644
--- a/pkgs/development/python-modules/pytest-flask/default.nix
+++ b/pkgs/development/python-modules/pytest-flask/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, pytest, flask, werkzeug, setuptools_scm, isPy27 }:
+{ lib, buildPythonPackage, fetchPypi, pytest, flask, werkzeug, setuptools_scm, isPy27 }:
 
 buildPythonPackage rec {
   pname = "pytest-flask";
diff --git a/pkgs/development/python-modules/pytest-helpers-namespace/default.nix b/pkgs/development/python-modules/pytest-helpers-namespace/default.nix
index 41263ce692b..c634aa00718 100644
--- a/pkgs/development/python-modules/pytest-helpers-namespace/default.nix
+++ b/pkgs/development/python-modules/pytest-helpers-namespace/default.nix
@@ -1,7 +1,7 @@
 { buildPythonPackage
 , fetchFromGitHub
 , pytest
-, lib, stdenv
+, lib
 }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/pytest-html/default.nix b/pkgs/development/python-modules/pytest-html/default.nix
index 0b1090f7b81..1b09d6863b9 100644
--- a/pkgs/development/python-modules/pytest-html/default.nix
+++ b/pkgs/development/python-modules/pytest-html/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, pythonOlder
+{ lib, buildPythonPackage, fetchPypi, pythonOlder
 , pytest, pytest-metadata, setuptools_scm }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/pytest-metadata/default.nix b/pkgs/development/python-modules/pytest-metadata/default.nix
index e8b224dc1d4..f7766003be1 100644
--- a/pkgs/development/python-modules/pytest-metadata/default.nix
+++ b/pkgs/development/python-modules/pytest-metadata/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , pytest, setuptools_scm }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/pytest-mpl/default.nix b/pkgs/development/python-modules/pytest-mpl/default.nix
index 0cc3a993c23..30a2757ecf3 100644
--- a/pkgs/development/python-modules/pytest-mpl/default.nix
+++ b/pkgs/development/python-modules/pytest-mpl/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pytest
diff --git a/pkgs/development/python-modules/pytest-pep257/default.nix b/pkgs/development/python-modules/pytest-pep257/default.nix
index eb5203c0246..827386786b7 100644
--- a/pkgs/development/python-modules/pytest-pep257/default.nix
+++ b/pkgs/development/python-modules/pytest-pep257/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, pytest, pep257 }:
+{ lib, buildPythonPackage, fetchPypi, pytest, pep257 }:
 
 buildPythonPackage rec {
   pname = "pytest-pep257";
diff --git a/pkgs/development/python-modules/pytest-quickcheck/default.nix b/pkgs/development/python-modules/pytest-quickcheck/default.nix
index 5148fa4b760..4e08a8fabba 100644
--- a/pkgs/development/python-modules/pytest-quickcheck/default.nix
+++ b/pkgs/development/python-modules/pytest-quickcheck/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, pytest, pytest-flakes, tox }:
+{ lib, buildPythonPackage, fetchPypi, pytest, pytest-flakes, tox }:
 buildPythonPackage rec {
   pname = "pytest-quickcheck";
   version = "0.8.6";
diff --git a/pkgs/development/python-modules/pytest-raisesregexp/default.nix b/pkgs/development/python-modules/pytest-raisesregexp/default.nix
index 0d02a25ec3c..78b99714378 100644
--- a/pkgs/development/python-modules/pytest-raisesregexp/default.nix
+++ b/pkgs/development/python-modules/pytest-raisesregexp/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , py, pytest }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/pytest-random-order/default.nix b/pkgs/development/python-modules/pytest-random-order/default.nix
index 2def886c5cb..d84bb3c9acf 100644
--- a/pkgs/development/python-modules/pytest-random-order/default.nix
+++ b/pkgs/development/python-modules/pytest-random-order/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pythonOlder
diff --git a/pkgs/development/python-modules/pytest-relaxed/default.nix b/pkgs/development/python-modules/pytest-relaxed/default.nix
index 401307039e5..19d031b6a2b 100644
--- a/pkgs/development/python-modules/pytest-relaxed/default.nix
+++ b/pkgs/development/python-modules/pytest-relaxed/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pytest
diff --git a/pkgs/development/python-modules/pytest-rerunfailures/default.nix b/pkgs/development/python-modules/pytest-rerunfailures/default.nix
index 537f32316a3..1bd91fe70f7 100644
--- a/pkgs/development/python-modules/pytest-rerunfailures/default.nix
+++ b/pkgs/development/python-modules/pytest-rerunfailures/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, pythonOlder, fetchPypi, pytest, mock }:
+{ lib, buildPythonPackage, pythonOlder, fetchPypi, pytest, mock }:
 
 buildPythonPackage rec {
   pname = "pytest-rerunfailures";
diff --git a/pkgs/development/python-modules/pytest-server-fixtures/default.nix b/pkgs/development/python-modules/pytest-server-fixtures/default.nix
index 41fcfc7b159..ca3c9a37c1a 100644
--- a/pkgs/development/python-modules/pytest-server-fixtures/default.nix
+++ b/pkgs/development/python-modules/pytest-server-fixtures/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , pytest, pytest-shutil, pytest-fixture-config, psutil
 , requests, future, retry }:
 
diff --git a/pkgs/development/python-modules/pytest-shutil/default.nix b/pkgs/development/python-modules/pytest-shutil/default.nix
index 3edafdfb473..9d088e44f8d 100644
--- a/pkgs/development/python-modules/pytest-shutil/default.nix
+++ b/pkgs/development/python-modules/pytest-shutil/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, isPyPy, buildPythonPackage, fetchPypi
+{ lib, isPyPy, buildPythonPackage, fetchPypi
 , pytest, cmdline, pytestcov, coverage, setuptools-git, mock, pathpy, execnet
 , contextlib2, termcolor }:
 
diff --git a/pkgs/development/python-modules/pytest-subtesthack/default.nix b/pkgs/development/python-modules/pytest-subtesthack/default.nix
index f7454ee644c..5006ac51150 100644
--- a/pkgs/development/python-modules/pytest-subtesthack/default.nix
+++ b/pkgs/development/python-modules/pytest-subtesthack/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, pytest }:
+{ lib, buildPythonPackage, fetchPypi, pytest }:
 
 buildPythonPackage rec {
   pname = "pytest-subtesthack";
diff --git a/pkgs/development/python-modules/pytest-virtualenv/default.nix b/pkgs/development/python-modules/pytest-virtualenv/default.nix
index a910bf3245f..8ea981ba2e7 100644
--- a/pkgs/development/python-modules/pytest-virtualenv/default.nix
+++ b/pkgs/development/python-modules/pytest-virtualenv/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , pytest, pytestcov, mock, cmdline, pytest-fixture-config, pytest-shutil, virtualenv }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/pytest-xdist/1.nix b/pkgs/development/python-modules/pytest-xdist/1.nix
index 0c5ae06e861..fa794f94141 100644
--- a/pkgs/development/python-modules/pytest-xdist/1.nix
+++ b/pkgs/development/python-modules/pytest-xdist/1.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage, execnet, pytest
+{ lib, fetchPypi, buildPythonPackage, execnet, pytest
 , setuptools_scm, pytest-forked, filelock, psutil, six, isPy3k }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/pytest-xdist/default.nix b/pkgs/development/python-modules/pytest-xdist/default.nix
index e5019f842fe..30e43c17c91 100644
--- a/pkgs/development/python-modules/pytest-xdist/default.nix
+++ b/pkgs/development/python-modules/pytest-xdist/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage, execnet, pytest_6
+{ lib, fetchPypi, buildPythonPackage, execnet, pytest_6
 , setuptools_scm, pytest-forked, filelock, psutil, six, isPy3k }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/pytest/4.nix b/pkgs/development/python-modules/pytest/4.nix
index 63e57a7f769..f30eec15a0a 100644
--- a/pkgs/development/python-modules/pytest/4.nix
+++ b/pkgs/development/python-modules/pytest/4.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, pythonOlder, fetchPypi, attrs, hypothesis, py
+{ lib, buildPythonPackage, pythonOlder, fetchPypi, attrs, hypothesis, py
 , setuptools_scm, setuptools, six, pluggy, funcsigs, isPy3k, more-itertools
 , atomicwrites, mock, writeText, pathlib2, wcwidth, packaging, isPyPy
 }:
diff --git a/pkgs/development/python-modules/pytest/5.nix b/pkgs/development/python-modules/pytest/5.nix
index 1293cc94b0f..341d5ac2240 100644
--- a/pkgs/development/python-modules/pytest/5.nix
+++ b/pkgs/development/python-modules/pytest/5.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, pythonOlder, fetchPypi, isPy3k, isPyPy
+{ lib, buildPythonPackage, pythonOlder, fetchPypi, isPy3k, isPyPy
 , atomicwrites
 , attrs
 , funcsigs
diff --git a/pkgs/development/python-modules/pytest/default.nix b/pkgs/development/python-modules/pytest/default.nix
index 6f5c99a99b1..798084d1111 100644
--- a/pkgs/development/python-modules/pytest/default.nix
+++ b/pkgs/development/python-modules/pytest/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, pythonOlder, fetchPypi, isPy3k, isPyPy
+{ lib, buildPythonPackage, pythonOlder, fetchPypi, isPy3k, isPyPy
 , atomicwrites
 , attrs
 , funcsigs
diff --git a/pkgs/development/python-modules/pytestcache/default.nix b/pkgs/development/python-modules/pytestcache/default.nix
index 877e357d946..cf8643db06d 100644
--- a/pkgs/development/python-modules/pytestcache/default.nix
+++ b/pkgs/development/python-modules/pytestcache/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , pytest, execnet }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/pytestrunner/default.nix b/pkgs/development/python-modules/pytestrunner/default.nix
index 7fd901babd0..d6203276b82 100644
--- a/pkgs/development/python-modules/pytestrunner/default.nix
+++ b/pkgs/development/python-modules/pytestrunner/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, setuptools_scm, pytest }:
+{ lib, buildPythonPackage, fetchPypi, setuptools_scm, pytest }:
 
 buildPythonPackage rec {
   pname = "pytest-runner";
diff --git a/pkgs/development/python-modules/python-doi/default.nix b/pkgs/development/python-modules/python-doi/default.nix
index 7e94f743da4..e0cb03d611d 100644
--- a/pkgs/development/python-modules/python-doi/default.nix
+++ b/pkgs/development/python-modules/python-doi/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub, isPy3k }:
+{ lib, buildPythonPackage, fetchFromGitHub, isPy3k }:
 
 buildPythonPackage rec {
   pname = "python-doi";
diff --git a/pkgs/development/python-modules/python-editor/default.nix b/pkgs/development/python-modules/python-editor/default.nix
index 19efcb89d3d..212e191568c 100644
--- a/pkgs/development/python-modules/python-editor/default.nix
+++ b/pkgs/development/python-modules/python-editor/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   version = "1.0.4";
diff --git a/pkgs/development/python-modules/python-efl/default.nix b/pkgs/development/python-modules/python-efl/default.nix
index 44e35a186e2..293d9771280 100644
--- a/pkgs/development/python-modules/python-efl/default.nix
+++ b/pkgs/development/python-modules/python-efl/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , fetchurl
 , buildPythonPackage
 , pkg-config
diff --git a/pkgs/development/python-modules/python-etcd/default.nix b/pkgs/development/python-modules/python-etcd/default.nix
index f4305473797..f9b01802c42 100644
--- a/pkgs/development/python-modules/python-etcd/default.nix
+++ b/pkgs/development/python-modules/python-etcd/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , nose
diff --git a/pkgs/development/python-modules/python-forecastio/default.nix b/pkgs/development/python-modules/python-forecastio/default.nix
index 392c5c2126d..991ec3279de 100644
--- a/pkgs/development/python-modules/python-forecastio/default.nix
+++ b/pkgs/development/python-modules/python-forecastio/default.nix
@@ -1,4 +1,4 @@
-{ buildPythonPackage, lib, stdenv, fetchPypi
+{ buildPythonPackage, lib, fetchPypi
 , requests
 , nose
 , responses
diff --git a/pkgs/development/python-modules/python-frontmatter/default.nix b/pkgs/development/python-modules/python-frontmatter/default.nix
index 661ea4ba249..6c6806f043c 100644
--- a/pkgs/development/python-modules/python-frontmatter/default.nix
+++ b/pkgs/development/python-modules/python-frontmatter/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, fetchFromGitHub, python3Packages }:
+{ lib, fetchFromGitHub, python3Packages }:
 
 python3Packages.buildPythonPackage rec {
   pname = "python-frontmatter";
diff --git a/pkgs/development/python-modules/python-gitlab/default.nix b/pkgs/development/python-modules/python-gitlab/default.nix
index c706ff7903c..1a2e28d57ab 100644
--- a/pkgs/development/python-modules/python-gitlab/default.nix
+++ b/pkgs/development/python-modules/python-gitlab/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, requests, mock, httmock, pythonOlder, pytest, responses }:
+{ lib, buildPythonPackage, fetchPypi, requests, mock, httmock, pythonOlder, pytest, responses }:
 
 buildPythonPackage rec {
   pname = "python-gitlab";
diff --git a/pkgs/development/python-modules/python-gnupg/default.nix b/pkgs/development/python-modules/python-gnupg/default.nix
index 36ca3a71906..fe686761107 100644
--- a/pkgs/development/python-modules/python-gnupg/default.nix
+++ b/pkgs/development/python-modules/python-gnupg/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, gnupg }:
+{ lib, buildPythonPackage, fetchPypi, gnupg }:
 
 buildPythonPackage rec {
   pname   = "python-gnupg";
diff --git a/pkgs/development/python-modules/python-hosts/default.nix b/pkgs/development/python-modules/python-hosts/default.nix
index 238b9b9e4af..c8f1179bc66 100644
--- a/pkgs/development/python-modules/python-hosts/default.nix
+++ b/pkgs/development/python-modules/python-hosts/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, pyyaml, pytest, pytestcov }:
+{ lib, buildPythonPackage, fetchPypi, pyyaml, pytest, pytestcov }:
 
 buildPythonPackage rec {
   pname = "python-hosts";
diff --git a/pkgs/development/python-modules/python-jose/default.nix b/pkgs/development/python-modules/python-jose/default.nix
index 0de220094c0..15c6474cc38 100644
--- a/pkgs/development/python-modules/python-jose/default.nix
+++ b/pkgs/development/python-modules/python-jose/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub
+{ lib, buildPythonPackage, fetchFromGitHub
 , future, six, ecdsa, rsa
 , pycrypto, pytestcov, pytestrunner, cryptography
 , pytestCheckHook
diff --git a/pkgs/development/python-modules/python-json-logger/default.nix b/pkgs/development/python-modules/python-json-logger/default.nix
index 96ce13ab265..cb36bf50e18 100644
--- a/pkgs/development/python-modules/python-json-logger/default.nix
+++ b/pkgs/development/python-modules/python-json-logger/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy27
diff --git a/pkgs/development/python-modules/python-jsonrpc-server/default.nix b/pkgs/development/python-modules/python-jsonrpc-server/default.nix
index 3a0ab33363e..53dab817eb2 100644
--- a/pkgs/development/python-modules/python-jsonrpc-server/default.nix
+++ b/pkgs/development/python-modules/python-jsonrpc-server/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, buildPythonPackage, fetchFromGitHub, pythonOlder
+{ lib, buildPythonPackage, fetchFromGitHub, pythonOlder
 , pytestCheckHook, mock, pytestcov, coverage
 , future, futures, ujson, isPy38
 }:
diff --git a/pkgs/development/python-modules/python-language-server/default.nix b/pkgs/development/python-modules/python-language-server/default.nix
index f22652d0f73..b30542dacbd 100644
--- a/pkgs/development/python-modules/python-language-server/default.nix
+++ b/pkgs/development/python-modules/python-language-server/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, buildPythonPackage, fetchFromGitHub, pythonOlder, isPy27
+{ lib, buildPythonPackage, fetchFromGitHub, pythonOlder, isPy27
 , backports_functools_lru_cache, configparser, futures, future, jedi, pluggy, python-jsonrpc-server, flake8
 , pytestCheckHook, mock, pytestcov, coverage, setuptools, ujson, flaky
 , # Allow building a limited set of providers, e.g. ["pycodestyle"].
diff --git a/pkgs/development/python-modules/python-ldap-test/default.nix b/pkgs/development/python-modules/python-ldap-test/default.nix
index 94d8abd1fab..379aaa5ab64 100644
--- a/pkgs/development/python-modules/python-ldap-test/default.nix
+++ b/pkgs/development/python-modules/python-ldap-test/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, py4j }:
+{ lib, buildPythonPackage, fetchPypi, py4j }:
 
 buildPythonPackage rec {
   pname = "python-ldap-test";
diff --git a/pkgs/development/python-modules/python-levenshtein/default.nix b/pkgs/development/python-modules/python-levenshtein/default.nix
index 60767e77e76..dda64a85fb2 100644
--- a/pkgs/development/python-modules/python-levenshtein/default.nix
+++ b/pkgs/development/python-modules/python-levenshtein/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/python-ly/default.nix b/pkgs/development/python-modules/python-ly/default.nix
index 6f83a7f61c7..cc38553a817 100644
--- a/pkgs/development/python-modules/python-ly/default.nix
+++ b/pkgs/development/python-modules/python-ly/default.nix
@@ -1,4 +1,4 @@
-{ buildPythonPackage, fetchPypi, lib, stdenv }:
+{ buildPythonPackage, fetchPypi, lib }:
 
 buildPythonPackage rec {
   pname = "python-ly";
diff --git a/pkgs/development/python-modules/python-lzf/default.nix b/pkgs/development/python-modules/python-lzf/default.nix
index a1fd0113423..61194ff8f9c 100644
--- a/pkgs/development/python-modules/python-lzf/default.nix
+++ b/pkgs/development/python-modules/python-lzf/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   version = "0.2.4";
diff --git a/pkgs/development/python-modules/python-mapnik/default.nix b/pkgs/development/python-modules/python-mapnik/default.nix
index fe68ed60e37..36c297358e8 100644
--- a/pkgs/development/python-modules/python-mapnik/default.nix
+++ b/pkgs/development/python-modules/python-mapnik/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , isPyPy
 , python
diff --git a/pkgs/development/python-modules/python-miio/default.nix b/pkgs/development/python-modules/python-miio/default.nix
index 8321795c2fb..78c89408ac2 100644
--- a/pkgs/development/python-modules/python-miio/default.nix
+++ b/pkgs/development/python-modules/python-miio/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , appdirs
diff --git a/pkgs/development/python-modules/python-mnist/default.nix b/pkgs/development/python-modules/python-mnist/default.nix
index a24f2a383a3..131c0f2f5ac 100644
--- a/pkgs/development/python-modules/python-mnist/default.nix
+++ b/pkgs/development/python-modules/python-mnist/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "python-mnist";
diff --git a/pkgs/development/python-modules/python-nomad/default.nix b/pkgs/development/python-modules/python-nomad/default.nix
index ba3ecd3883a..4bb12ab7237 100644
--- a/pkgs/development/python-modules/python-nomad/default.nix
+++ b/pkgs/development/python-modules/python-nomad/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, requests }:
+{ lib, buildPythonPackage, fetchPypi, requests }:
 
 buildPythonPackage rec {
   pname = "python-nomad";
diff --git a/pkgs/development/python-modules/python-otr/default.nix b/pkgs/development/python-modules/python-otr/default.nix
index 7a40998eebd..6b657dba78d 100644
--- a/pkgs/development/python-modules/python-otr/default.nix
+++ b/pkgs/development/python-modules/python-otr/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 , isPy3k
diff --git a/pkgs/development/python-modules/python-packer/default.nix b/pkgs/development/python-modules/python-packer/default.nix
index ba02ec84635..2e2b59eb29d 100644
--- a/pkgs/development/python-modules/python-packer/default.nix
+++ b/pkgs/development/python-modules/python-packer/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, fetchpatch, sh }:
+{ lib, buildPythonPackage, fetchPypi, fetchpatch, sh }:
 
 buildPythonPackage rec {
   pname = "python-packer";
diff --git a/pkgs/development/python-modules/python-pipedrive/default.nix b/pkgs/development/python-modules/python-pipedrive/default.nix
index 6e0c0ef5788..d776002b212 100644
--- a/pkgs/development/python-modules/python-pipedrive/default.nix
+++ b/pkgs/development/python-modules/python-pipedrive/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , python
diff --git a/pkgs/development/python-modules/python-ptrace/default.nix b/pkgs/development/python-modules/python-ptrace/default.nix
index 2d81581c0cc..1af58300c2f 100644
--- a/pkgs/development/python-modules/python-ptrace/default.nix
+++ b/pkgs/development/python-modules/python-ptrace/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , six
diff --git a/pkgs/development/python-modules/python-rapidjson/default.nix b/pkgs/development/python-modules/python-rapidjson/default.nix
index c4cf0dc7425..4ef3b9f8379 100644
--- a/pkgs/development/python-modules/python-rapidjson/default.nix
+++ b/pkgs/development/python-modules/python-rapidjson/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pythonOlder
diff --git a/pkgs/development/python-modules/python-redis-lock/default.nix b/pkgs/development/python-modules/python-redis-lock/default.nix
index 235d085fffd..7a53e73b2b8 100644
--- a/pkgs/development/python-modules/python-redis-lock/default.nix
+++ b/pkgs/development/python-modules/python-redis-lock/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , redis
diff --git a/pkgs/development/python-modules/python-simple-hipchat/default.nix b/pkgs/development/python-modules/python-simple-hipchat/default.nix
index 8ec7f6887ad..3162a032628 100644
--- a/pkgs/development/python-modules/python-simple-hipchat/default.nix
+++ b/pkgs/development/python-modules/python-simple-hipchat/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , unzip }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/python-slugify/default.nix b/pkgs/development/python-modules/python-slugify/default.nix
index 1860ff6d24d..fd488f4be9d 100644
--- a/pkgs/development/python-modules/python-slugify/default.nix
+++ b/pkgs/development/python-modules/python-slugify/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage, python, text-unidecode }:
+{ lib, fetchPypi, buildPythonPackage, python, text-unidecode }:
 
 buildPythonPackage rec {
     pname = "python-slugify";
diff --git a/pkgs/development/python-modules/python-socketio/default.nix b/pkgs/development/python-modules/python-socketio/default.nix
index ee9a6030144..e9c2ae146b0 100644
--- a/pkgs/development/python-modules/python-socketio/default.nix
+++ b/pkgs/development/python-modules/python-socketio/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , bidict
 , buildPythonPackage
 , fetchFromGitHub
diff --git a/pkgs/development/python-modules/python-telegram-bot/default.nix b/pkgs/development/python-modules/python-telegram-bot/default.nix
index 52dea24c45f..b681fcf85a9 100644
--- a/pkgs/development/python-modules/python-telegram-bot/default.nix
+++ b/pkgs/development/python-modules/python-telegram-bot/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , fetchPypi
 , buildPythonPackage
 , certifi
diff --git a/pkgs/development/python-modules/python-twitter/default.nix b/pkgs/development/python-modules/python-twitter/default.nix
index 4b1e7e2c1eb..c368d97633f 100644
--- a/pkgs/development/python-modules/python-twitter/default.nix
+++ b/pkgs/development/python-modules/python-twitter/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 , fetchpatch
diff --git a/pkgs/development/python-modules/python-u2flib-host/default.nix b/pkgs/development/python-modules/python-u2flib-host/default.nix
index 7f6f14c9888..94f56698a3e 100644
--- a/pkgs/development/python-modules/python-u2flib-host/default.nix
+++ b/pkgs/development/python-modules/python-u2flib-host/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage, requests, hidapi }:
+{ lib, fetchPypi, buildPythonPackage, requests, hidapi }:
 
 buildPythonPackage rec {
   pname = "python-u2flib-host";
diff --git a/pkgs/development/python-modules/python-uinput/default.nix b/pkgs/development/python-modules/python-uinput/default.nix
index 69f741e7437..8d82ffb6b3b 100644
--- a/pkgs/development/python-modules/python-uinput/default.nix
+++ b/pkgs/development/python-modules/python-uinput/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , udev }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/python-unshare/default.nix b/pkgs/development/python-modules/python-unshare/default.nix
index fa82027777f..f80721078db 100644
--- a/pkgs/development/python-modules/python-unshare/default.nix
+++ b/pkgs/development/python-modules/python-unshare/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 }:
diff --git a/pkgs/development/python-modules/python-vipaccess/default.nix b/pkgs/development/python-modules/python-vipaccess/default.nix
index f96086393f2..8c3a5bf797d 100644
--- a/pkgs/development/python-modules/python-vipaccess/default.nix
+++ b/pkgs/development/python-modules/python-vipaccess/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , oath
diff --git a/pkgs/development/python-modules/python-wifi/default.nix b/pkgs/development/python-modules/python-wifi/default.nix
index 503fbe101b9..7f6eee4906c 100644
--- a/pkgs/development/python-modules/python-wifi/default.nix
+++ b/pkgs/development/python-modules/python-wifi/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy27
diff --git a/pkgs/development/python-modules/python2-pythondialog/default.nix b/pkgs/development/python-modules/python2-pythondialog/default.nix
index b9d9b110f60..78378a738db 100644
--- a/pkgs/development/python-modules/python2-pythondialog/default.nix
+++ b/pkgs/development/python-modules/python2-pythondialog/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy3k
diff --git a/pkgs/development/python-modules/python3-openid/default.nix b/pkgs/development/python-modules/python3-openid/default.nix
index ad8ea88d1d0..769067f53fb 100644
--- a/pkgs/development/python-modules/python3-openid/default.nix
+++ b/pkgs/development/python-modules/python3-openid/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, isPy3k, buildPythonPackage, fetchPypi, defusedxml }:
+{ lib, isPy3k, buildPythonPackage, fetchPypi, defusedxml }:
 
 buildPythonPackage rec {
   pname = "python3-openid";
diff --git a/pkgs/development/python-modules/python_fedora/default.nix b/pkgs/development/python-modules/python_fedora/default.nix
index df12d7aeaff..6a5c6a304f1 100644
--- a/pkgs/development/python-modules/python_fedora/default.nix
+++ b/pkgs/development/python-modules/python_fedora/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, kitchen, requests, bunch, paver
+{ lib, buildPythonPackage, fetchPypi, kitchen, requests, bunch, paver
 , six, munch, urllib3, beautifulsoup4, openidc-client, lockfile }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/python_keyczar/default.nix b/pkgs/development/python-modules/python_keyczar/default.nix
index 5fff75ada91..66cf28a15dd 100644
--- a/pkgs/development/python-modules/python_keyczar/default.nix
+++ b/pkgs/development/python-modules/python_keyczar/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pyasn1
diff --git a/pkgs/development/python-modules/python_mimeparse/default.nix b/pkgs/development/python-modules/python_mimeparse/default.nix
index c3f85affe81..0f713bd2139 100644
--- a/pkgs/development/python-modules/python_mimeparse/default.nix
+++ b/pkgs/development/python-modules/python_mimeparse/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/python_openzwave/default.nix b/pkgs/development/python-modules/python_openzwave/default.nix
index 2c5357297ea..8f649d4d4d2 100644
--- a/pkgs/development/python-modules/python_openzwave/default.nix
+++ b/pkgs/development/python-modules/python_openzwave/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, isPy3k
+{ lib, buildPythonPackage, fetchPypi, isPy3k
 , pkg-config
 , systemd, libyaml, openzwave, cython, pyserial
 , six, pydispatcher, urwid }:
diff --git a/pkgs/development/python-modules/python_statsd/default.nix b/pkgs/development/python-modules/python_statsd/default.nix
index ae293c44c0f..2aabaec2e14 100644
--- a/pkgs/development/python-modules/python_statsd/default.nix
+++ b/pkgs/development/python-modules/python_statsd/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy3k
diff --git a/pkgs/development/python-modules/pythondialog/default.nix b/pkgs/development/python-modules/pythondialog/default.nix
index c385f11b2f0..6f8b6a2bbec 100644
--- a/pkgs/development/python-modules/pythondialog/default.nix
+++ b/pkgs/development/python-modules/pythondialog/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy3k
diff --git a/pkgs/development/python-modules/pythonirclib/default.nix b/pkgs/development/python-modules/pythonirclib/default.nix
index 178e1855a06..54c84fe6ef5 100644
--- a/pkgs/development/python-modules/pythonirclib/default.nix
+++ b/pkgs/development/python-modules/pythonirclib/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchurl
 , paver
diff --git a/pkgs/development/python-modules/pythonix/default.nix b/pkgs/development/python-modules/pythonix/default.nix
index 80535b28bf2..9261ab2a8f2 100644
--- a/pkgs/development/python-modules/pythonix/default.nix
+++ b/pkgs/development/python-modules/pythonix/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub, ninja, boost, meson, pkg-config, nix, isPy3k, python }:
+{ lib, buildPythonPackage, fetchFromGitHub, ninja, boost, meson, pkg-config, nix, isPy3k, python }:
 
 buildPythonPackage rec {
   pname = "pythonix";
diff --git a/pkgs/development/python-modules/pytimeparse/default.nix b/pkgs/development/python-modules/pytimeparse/default.nix
index 1ced6437530..3bf0ad078c5 100644
--- a/pkgs/development/python-modules/pytimeparse/default.nix
+++ b/pkgs/development/python-modules/pytimeparse/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage, nose }:
+{ lib, fetchPypi, buildPythonPackage, nose }:
 
 buildPythonPackage rec {
     pname = "pytimeparse";
diff --git a/pkgs/development/python-modules/pytoml/default.nix b/pkgs/development/python-modules/pytoml/default.nix
index 64e6ed4c669..b13dfd07dad 100644
--- a/pkgs/development/python-modules/pytoml/default.nix
+++ b/pkgs/development/python-modules/pytoml/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 , python
diff --git a/pkgs/development/python-modules/pytrends/default.nix b/pkgs/development/python-modules/pytrends/default.nix
index 83980c3d00b..3ce1e70e823 100644
--- a/pkgs/development/python-modules/pytrends/default.nix
+++ b/pkgs/development/python-modules/pytrends/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy27
diff --git a/pkgs/development/python-modules/pytricia/default.nix b/pkgs/development/python-modules/pytricia/default.nix
index 8e168bf8181..01c4ea014ad 100644
--- a/pkgs/development/python-modules/pytricia/default.nix
+++ b/pkgs/development/python-modules/pytricia/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 }:
diff --git a/pkgs/development/python-modules/pytun/default.nix b/pkgs/development/python-modules/pytun/default.nix
index 2b49b169c6d..3437c0fbe7a 100644
--- a/pkgs/development/python-modules/pytun/default.nix
+++ b/pkgs/development/python-modules/pytun/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 }:
diff --git a/pkgs/development/python-modules/pytzdata/default.nix b/pkgs/development/python-modules/pytzdata/default.nix
index 739325d3333..342bb088170 100644
--- a/pkgs/development/python-modules/pytzdata/default.nix
+++ b/pkgs/development/python-modules/pytzdata/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage }:
+{ lib, fetchPypi, buildPythonPackage }:
 
 buildPythonPackage rec {
   pname = "pytzdata";
diff --git a/pkgs/development/python-modules/pyunifi/default.nix b/pkgs/development/python-modules/pyunifi/default.nix
index 1eec6f3ea84..dfbae696b8e 100644
--- a/pkgs/development/python-modules/pyunifi/default.nix
+++ b/pkgs/development/python-modules/pyunifi/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , requests }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/pyupdate/default.nix b/pkgs/development/python-modules/pyupdate/default.nix
index f33aba8d625..cd0460dc7e1 100644
--- a/pkgs/development/python-modules/pyupdate/default.nix
+++ b/pkgs/development/python-modules/pyupdate/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, isPy3k
+{ lib, buildPythonPackage, fetchPypi, isPy3k
 , requests }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/pyutil/default.nix b/pkgs/development/python-modules/pyutil/default.nix
index f1c0d3be8cc..dd1c7b2da5b 100644
--- a/pkgs/development/python-modules/pyutil/default.nix
+++ b/pkgs/development/python-modules/pyutil/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , setuptoolsDarcs
diff --git a/pkgs/development/python-modules/pyuv/default.nix b/pkgs/development/python-modules/pyuv/default.nix
index 95477196d8b..0be0d61ed0d 100644
--- a/pkgs/development/python-modules/pyuv/default.nix
+++ b/pkgs/development/python-modules/pyuv/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , isPyPy
 , pkgs
diff --git a/pkgs/development/python-modules/pyvoro/default.nix b/pkgs/development/python-modules/pyvoro/default.nix
index 7013cc7809d..2fd5a96fa93 100644
--- a/pkgs/development/python-modules/pyvoro/default.nix
+++ b/pkgs/development/python-modules/pyvoro/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/pywatchman/default.nix b/pkgs/development/python-modules/pywatchman/default.nix
index 5e3c4d6cc5a..a2cd2a6eed5 100644
--- a/pkgs/development/python-modules/pywatchman/default.nix
+++ b/pkgs/development/python-modules/pywatchman/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, watchman }:
+{ lib, buildPythonPackage, fetchPypi, watchman }:
 
 buildPythonPackage rec {
   pname = "pywatchman";
diff --git a/pkgs/development/python-modules/pywebdav/default.nix b/pkgs/development/python-modules/pywebdav/default.nix
index 5ed3e28b5b1..2f6bb8553a4 100644
--- a/pkgs/development/python-modules/pywebdav/default.nix
+++ b/pkgs/development/python-modules/pywebdav/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage, isPy3k }:
+{ lib, fetchPypi, buildPythonPackage, isPy3k }:
 
 buildPythonPackage rec {
   pname = "PyWebDAV";
diff --git a/pkgs/development/python-modules/pyx/default.nix b/pkgs/development/python-modules/pyx/default.nix
index b19e5f97e14..d46bd718a3a 100644
--- a/pkgs/development/python-modules/pyx/default.nix
+++ b/pkgs/development/python-modules/pyx/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy3k
diff --git a/pkgs/development/python-modules/pyzufall/default.nix b/pkgs/development/python-modules/pyzufall/default.nix
index 03fce00629d..e0434e8e4dd 100644
--- a/pkgs/development/python-modules/pyzufall/default.nix
+++ b/pkgs/development/python-modules/pyzufall/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, python, buildPythonPackage, nose, future, coverage }:
+{ lib, fetchPypi, python, buildPythonPackage, nose, future, coverage }:
 
 buildPythonPackage rec {
   pname = "PyZufall";
diff --git a/pkgs/development/python-modules/qpid-python/default.nix b/pkgs/development/python-modules/qpid-python/default.nix
index ef540538792..24c90d072a2 100644
--- a/pkgs/development/python-modules/qpid-python/default.nix
+++ b/pkgs/development/python-modules/qpid-python/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchurl
 , isPy3k
diff --git a/pkgs/development/python-modules/qrcode/default.nix b/pkgs/development/python-modules/qrcode/default.nix
index 113d53ff29b..29f2ab49606 100644
--- a/pkgs/development/python-modules/qrcode/default.nix
+++ b/pkgs/development/python-modules/qrcode/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , six
diff --git a/pkgs/development/python-modules/qscintilla/default.nix b/pkgs/development/python-modules/qscintilla/default.nix
index 82c3773f303..24719de779e 100644
--- a/pkgs/development/python-modules/qscintilla/default.nix
+++ b/pkgs/development/python-modules/qscintilla/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , disabledIf
 , isPy3k
diff --git a/pkgs/development/python-modules/qserve/default.nix b/pkgs/development/python-modules/qserve/default.nix
index ff606d13236..0548b6fdf17 100644
--- a/pkgs/development/python-modules/qserve/default.nix
+++ b/pkgs/development/python-modules/qserve/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy3k
diff --git a/pkgs/development/python-modules/qtawesome/default.nix b/pkgs/development/python-modules/qtawesome/default.nix
index 11b4885e4c8..4945bead42d 100644
--- a/pkgs/development/python-modules/qtawesome/default.nix
+++ b/pkgs/development/python-modules/qtawesome/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, qtpy, six, pyqt5, pytest }:
+{ lib, buildPythonPackage, fetchPypi, qtpy, six, pyqt5, pytest }:
 
 buildPythonPackage rec {
   pname = "QtAwesome";
diff --git a/pkgs/development/python-modules/qtpy/default.nix b/pkgs/development/python-modules/qtpy/default.nix
index 76db7090a04..17e1d9dbe83 100644
--- a/pkgs/development/python-modules/qtpy/default.nix
+++ b/pkgs/development/python-modules/qtpy/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, pyside, pytest }:
+{ lib, buildPythonPackage, fetchPypi, pyside, pytest }:
 
 buildPythonPackage rec {
   pname = "QtPy";
diff --git a/pkgs/development/python-modules/querystring-parser/default.nix b/pkgs/development/python-modules/querystring-parser/default.nix
index 25b3c113cec..6288d196bb4 100644
--- a/pkgs/development/python-modules/querystring-parser/default.nix
+++ b/pkgs/development/python-modules/querystring-parser/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, python, isPy27
+{ lib, buildPythonPackage, fetchPypi, python, isPy27
 , six
 }:
 
diff --git a/pkgs/development/python-modules/queuelib/default.nix b/pkgs/development/python-modules/queuelib/default.nix
index 7471ea18065..3814663c044 100644
--- a/pkgs/development/python-modules/queuelib/default.nix
+++ b/pkgs/development/python-modules/queuelib/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pytest
diff --git a/pkgs/development/python-modules/rabbitpy/default.nix b/pkgs/development/python-modules/rabbitpy/default.nix
index 79975ada501..0de5d6de3bb 100644
--- a/pkgs/development/python-modules/rabbitpy/default.nix
+++ b/pkgs/development/python-modules/rabbitpy/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 , mock
diff --git a/pkgs/development/python-modules/radicale_infcloud/default.nix b/pkgs/development/python-modules/radicale_infcloud/default.nix
index 5c561b6e654..5d3540e0195 100644
--- a/pkgs/development/python-modules/radicale_infcloud/default.nix
+++ b/pkgs/development/python-modules/radicale_infcloud/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, buildPythonPackage }:
+{ lib, fetchFromGitHub, buildPythonPackage }:
 
 buildPythonPackage {
   pname = "radicale_infcloud";
diff --git a/pkgs/development/python-modules/rainbowstream/default.nix b/pkgs/development/python-modules/rainbowstream/default.nix
index c5ec1d3ab4e..e484c07f31c 100644
--- a/pkgs/development/python-modules/rainbowstream/default.nix
+++ b/pkgs/development/python-modules/rainbowstream/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , python
diff --git a/pkgs/development/python-modules/ramlfications/default.nix b/pkgs/development/python-modules/ramlfications/default.nix
index 2d3e2bdc0e0..c3ae88d1775 100644
--- a/pkgs/development/python-modules/ramlfications/default.nix
+++ b/pkgs/development/python-modules/ramlfications/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , mock, pytest, pytest-mock, pytest-server-fixtures, pytest-localserver
 , termcolor, click, markdown2, six, jsonref, pyyaml, xmltodict, attrs
 }:
diff --git a/pkgs/development/python-modules/random2/default.nix b/pkgs/development/python-modules/random2/default.nix
index 9ed7701a3f4..6845a5707da 100644
--- a/pkgs/development/python-modules/random2/default.nix
+++ b/pkgs/development/python-modules/random2/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPyPy
diff --git a/pkgs/development/python-modules/rarfile/default.nix b/pkgs/development/python-modules/rarfile/default.nix
index 22c34b82a5f..545782d853e 100644
--- a/pkgs/development/python-modules/rarfile/default.nix
+++ b/pkgs/development/python-modules/rarfile/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub, pytestCheckHook, nose, libarchive, glibcLocales, isPy27
+{ lib, buildPythonPackage, fetchFromGitHub, pytestCheckHook, nose, libarchive, glibcLocales, isPy27
 # unrar is non-free software
 , useUnrar ? false, unrar
 }:
diff --git a/pkgs/development/python-modules/ratelimiter/default.nix b/pkgs/development/python-modules/ratelimiter/default.nix
index 4d3ff6d486b..fc51e1488d6 100644
--- a/pkgs/development/python-modules/ratelimiter/default.nix
+++ b/pkgs/development/python-modules/ratelimiter/default.nix
@@ -1,5 +1,5 @@
 {
-  lib, stdenv
+  lib
 , buildPythonPackage
 , fetchPypi
 , pytest
diff --git a/pkgs/development/python-modules/rawkit/default.nix b/pkgs/development/python-modules/rawkit/default.nix
index 974f7ac4d1c..0a96123db04 100644
--- a/pkgs/development/python-modules/rawkit/default.nix
+++ b/pkgs/development/python-modules/rawkit/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage, fetchpatch
+{ lib, fetchPypi, buildPythonPackage, fetchpatch
 , libraw
 , pytest, mock }:
 
diff --git a/pkgs/development/python-modules/rcssmin/default.nix b/pkgs/development/python-modules/rcssmin/default.nix
index 507102222fe..3de6f203803 100644
--- a/pkgs/development/python-modules/rcssmin/default.nix
+++ b/pkgs/development/python-modules/rcssmin/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 buildPythonPackage rec {
   pname = "rcssmin";
   version = "1.0.6";
diff --git a/pkgs/development/python-modules/readchar/default.nix b/pkgs/development/python-modules/readchar/default.nix
index 211f5d63a7d..ea13c7083fe 100644
--- a/pkgs/development/python-modules/readchar/default.nix
+++ b/pkgs/development/python-modules/readchar/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub, flake8, pytest, pytestcov, pexpect }:
+{ lib, buildPythonPackage, fetchFromGitHub, flake8, pytest, pytestcov, pexpect }:
 
 buildPythonPackage rec {
   pname = "readchar";
diff --git a/pkgs/development/python-modules/readme/default.nix b/pkgs/development/python-modules/readme/default.nix
index 044c487eb03..95b45185a08 100644
--- a/pkgs/development/python-modules/readme/default.nix
+++ b/pkgs/development/python-modules/readme/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pytest
diff --git a/pkgs/development/python-modules/rebulk/default.nix b/pkgs/development/python-modules/rebulk/default.nix
index 750efe357c2..8a4754e7a61 100644
--- a/pkgs/development/python-modules/rebulk/default.nix
+++ b/pkgs/development/python-modules/rebulk/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, pytest, pytestrunner, six, regex}:
+{ lib, buildPythonPackage, fetchPypi, pytest, pytestrunner, six, regex}:
 
 buildPythonPackage rec {
   pname = "rebulk";
diff --git a/pkgs/development/python-modules/recaptcha_client/default.nix b/pkgs/development/python-modules/recaptcha_client/default.nix
index 08e7ff47aa1..dce24cfa7a8 100644
--- a/pkgs/development/python-modules/recaptcha_client/default.nix
+++ b/pkgs/development/python-modules/recaptcha_client/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pythonAtLeast
diff --git a/pkgs/development/python-modules/reedsolo/default.nix b/pkgs/development/python-modules/reedsolo/default.nix
index c87a89b82a4..d9dd54e29f4 100644
--- a/pkgs/development/python-modules/reedsolo/default.nix
+++ b/pkgs/development/python-modules/reedsolo/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub, cython, nose }:
+{ lib, buildPythonPackage, fetchFromGitHub, cython, nose }:
 
 buildPythonPackage rec {
   pname = "reedsolo";
diff --git a/pkgs/development/python-modules/remotecv/default.nix b/pkgs/development/python-modules/remotecv/default.nix
index dc40763f6fe..078e431f3ba 100644
--- a/pkgs/development/python-modules/remotecv/default.nix
+++ b/pkgs/development/python-modules/remotecv/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub, pillow, pyres, nose
+{ lib, buildPythonPackage, fetchFromGitHub, pillow, pyres, nose
 , preggy, numpy, yanc, nose-focus, mock, opencv }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/rencode/default.nix b/pkgs/development/python-modules/rencode/default.nix
index a8f0f81ee71..a742c422ee9 100644
--- a/pkgs/development/python-modules/rencode/default.nix
+++ b/pkgs/development/python-modules/rencode/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchgit
 , cython
diff --git a/pkgs/development/python-modules/repeated_test/default.nix b/pkgs/development/python-modules/repeated_test/default.nix
index a9355cda41c..2c51238e19b 100644
--- a/pkgs/development/python-modules/repeated_test/default.nix
+++ b/pkgs/development/python-modules/repeated_test/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , unittest2
diff --git a/pkgs/development/python-modules/repocheck/default.nix b/pkgs/development/python-modules/repocheck/default.nix
index ad8c3aef2ea..9d6c2c41921 100644
--- a/pkgs/development/python-modules/repocheck/default.nix
+++ b/pkgs/development/python-modules/repocheck/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 }:
diff --git a/pkgs/development/python-modules/repoze_lru/default.nix b/pkgs/development/python-modules/repoze_lru/default.nix
index 7b8f0ecd809..e986f47e6e0 100644
--- a/pkgs/development/python-modules/repoze_lru/default.nix
+++ b/pkgs/development/python-modules/repoze_lru/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/repoze_sphinx_autointerface/default.nix b/pkgs/development/python-modules/repoze_sphinx_autointerface/default.nix
index 53761203113..5d5e27a2e11 100644
--- a/pkgs/development/python-modules/repoze_sphinx_autointerface/default.nix
+++ b/pkgs/development/python-modules/repoze_sphinx_autointerface/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , zope_interface
diff --git a/pkgs/development/python-modules/repoze_who/default.nix b/pkgs/development/python-modules/repoze_who/default.nix
index f64158f26a1..1b33bb6954b 100644
--- a/pkgs/development/python-modules/repoze_who/default.nix
+++ b/pkgs/development/python-modules/repoze_who/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , zope_interface
diff --git a/pkgs/development/python-modules/requests-cache/default.nix b/pkgs/development/python-modules/requests-cache/default.nix
index 2b3d57831c8..d39fcc5f2a6 100644
--- a/pkgs/development/python-modules/requests-cache/default.nix
+++ b/pkgs/development/python-modules/requests-cache/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , mock, requests, six, urllib3 }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/requests-http-signature/default.nix b/pkgs/development/python-modules/requests-http-signature/default.nix
index cd36a452819..225a8f149e4 100644
--- a/pkgs/development/python-modules/requests-http-signature/default.nix
+++ b/pkgs/development/python-modules/requests-http-signature/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 , requests
diff --git a/pkgs/development/python-modules/requests-kerberos/default.nix b/pkgs/development/python-modules/requests-kerberos/default.nix
index a1c6f4fb0a1..73272990e0f 100644
--- a/pkgs/development/python-modules/requests-kerberos/default.nix
+++ b/pkgs/development/python-modules/requests-kerberos/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, buildPythonPackage, requests, pykerberos, mock }:
+{ lib, fetchFromGitHub, buildPythonPackage, requests, pykerberos, mock }:
 
 buildPythonPackage rec {
   pname = "requests-kerberos";
diff --git a/pkgs/development/python-modules/requests/default.nix b/pkgs/development/python-modules/requests/default.nix
index a49b0710220..e0dfb9a24a6 100644
--- a/pkgs/development/python-modules/requests/default.nix
+++ b/pkgs/development/python-modules/requests/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage
+{ lib, fetchPypi, buildPythonPackage
 , urllib3, idna, chardet, certifi
 , pytest }:
 
diff --git a/pkgs/development/python-modules/resampy/default.nix b/pkgs/development/python-modules/resampy/default.nix
index 38b4ae9911d..551c7f5b93e 100644
--- a/pkgs/development/python-modules/resampy/default.nix
+++ b/pkgs/development/python-modules/resampy/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 , pytest
diff --git a/pkgs/development/python-modules/rethinkdb/default.nix b/pkgs/development/python-modules/rethinkdb/default.nix
index b3590023373..947aa505f70 100644
--- a/pkgs/development/python-modules/rethinkdb/default.nix
+++ b/pkgs/development/python-modules/rethinkdb/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , six
diff --git a/pkgs/development/python-modules/retry_decorator/default.nix b/pkgs/development/python-modules/retry_decorator/default.nix
index 12ba4f9a1a5..c2f91c8fe1b 100644
--- a/pkgs/development/python-modules/retry_decorator/default.nix
+++ b/pkgs/development/python-modules/retry_decorator/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/retrying/default.nix b/pkgs/development/python-modules/retrying/default.nix
index 65127d040f4..5e2451affb9 100644
--- a/pkgs/development/python-modules/retrying/default.nix
+++ b/pkgs/development/python-modules/retrying/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , six
diff --git a/pkgs/development/python-modules/rfc-bibtex/default.nix b/pkgs/development/python-modules/rfc-bibtex/default.nix
index c002f0baaa9..b9b7cdb76c4 100644
--- a/pkgs/development/python-modules/rfc-bibtex/default.nix
+++ b/pkgs/development/python-modules/rfc-bibtex/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonApplication, fetchPypi, isPy3k }:
+{ lib, buildPythonApplication, fetchPypi, isPy3k }:
 
 buildPythonApplication rec {
   pname = "rfc-bibtex";
diff --git a/pkgs/development/python-modules/rfc3986/default.nix b/pkgs/development/python-modules/rfc3986/default.nix
index 561bda08d0c..93f2f2ce37d 100644
--- a/pkgs/development/python-modules/rfc3986/default.nix
+++ b/pkgs/development/python-modules/rfc3986/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, idna, pytestCheckHook }:
+{ lib, buildPythonPackage, fetchPypi, idna, pytestCheckHook }:
 
 buildPythonPackage rec {
   pname = "rfc3986";
diff --git a/pkgs/development/python-modules/rfc3987/default.nix b/pkgs/development/python-modules/rfc3987/default.nix
index 1ec8fc2153c..41beb1c8c17 100644
--- a/pkgs/development/python-modules/rfc3987/default.nix
+++ b/pkgs/development/python-modules/rfc3987/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "rfc3987";
diff --git a/pkgs/development/python-modules/rich/default.nix b/pkgs/development/python-modules/rich/default.nix
index d19f47281cd..3c0810072c0 100644
--- a/pkgs/development/python-modules/rich/default.nix
+++ b/pkgs/development/python-modules/rich/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 , pythonOlder
diff --git a/pkgs/development/python-modules/rjsmin/default.nix b/pkgs/development/python-modules/rjsmin/default.nix
index 7ca9d711739..d78c445a3e5 100644
--- a/pkgs/development/python-modules/rjsmin/default.nix
+++ b/pkgs/development/python-modules/rjsmin/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 buildPythonPackage rec {
   pname = "rjsmin";
   version = "1.1.0";
diff --git a/pkgs/development/python-modules/rl-coach/default.nix b/pkgs/development/python-modules/rl-coach/default.nix
index 0ac5d9ab2a3..0724abec19a 100644
--- a/pkgs/development/python-modules/rl-coach/default.nix
+++ b/pkgs/development/python-modules/rl-coach/default.nix
@@ -1,5 +1,4 @@
-{ stdenv
-, lib
+{ lib
 , buildPythonPackage
 , pythonOlder
 , fetchPypi
diff --git a/pkgs/development/python-modules/robomachine/default.nix b/pkgs/development/python-modules/robomachine/default.nix
index fe069be459c..4f5d44006c4 100644
--- a/pkgs/development/python-modules/robomachine/default.nix
+++ b/pkgs/development/python-modules/robomachine/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage, pyparsing, robotframework, allpairspy }:
+{ lib, fetchPypi, buildPythonPackage, pyparsing, robotframework, allpairspy }:
 
 buildPythonPackage rec {
   pname = "RoboMachine";
diff --git a/pkgs/development/python-modules/robot-detection/default.nix b/pkgs/development/python-modules/robot-detection/default.nix
index 3cf064d2669..31b1f43a4e2 100644
--- a/pkgs/development/python-modules/robot-detection/default.nix
+++ b/pkgs/development/python-modules/robot-detection/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, six }:
+{ lib, buildPythonPackage, fetchPypi, six }:
 
 buildPythonPackage rec {
   pname = "robot-detection";
diff --git a/pkgs/development/python-modules/robotframework-databaselibrary/default.nix b/pkgs/development/python-modules/robotframework-databaselibrary/default.nix
index c3eb309dfe0..8dfbb32fe08 100644
--- a/pkgs/development/python-modules/robotframework-databaselibrary/default.nix
+++ b/pkgs/development/python-modules/robotframework-databaselibrary/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , robotframework
diff --git a/pkgs/development/python-modules/robotframework-requests/default.nix b/pkgs/development/python-modules/robotframework-requests/default.nix
index 967138620e9..f23979f21fd 100644
--- a/pkgs/development/python-modules/robotframework-requests/default.nix
+++ b/pkgs/development/python-modules/robotframework-requests/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , unittest2
diff --git a/pkgs/development/python-modules/robotframework-ride/default.nix b/pkgs/development/python-modules/robotframework-ride/default.nix
index 39e42596e2a..bc9e0873fe5 100644
--- a/pkgs/development/python-modules/robotframework-ride/default.nix
+++ b/pkgs/development/python-modules/robotframework-ride/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, buildPythonPackage, isPy3k, pygments, wxPython }:
+{ lib, fetchurl, buildPythonPackage, isPy3k, pygments, wxPython }:
 
 buildPythonPackage rec {
   version = "1.2.3";
diff --git a/pkgs/development/python-modules/robotframework-selenium2library/default.nix b/pkgs/development/python-modules/robotframework-selenium2library/default.nix
index 5fa87d17d11..6d079a99b4f 100644
--- a/pkgs/development/python-modules/robotframework-selenium2library/default.nix
+++ b/pkgs/development/python-modules/robotframework-selenium2library/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, robotframework-seleniumlibrary }:
+{ lib, buildPythonPackage, fetchPypi, robotframework-seleniumlibrary }:
 
 buildPythonPackage rec {
   version = "3.0.0";
diff --git a/pkgs/development/python-modules/robotframework-seleniumlibrary/default.nix b/pkgs/development/python-modules/robotframework-seleniumlibrary/default.nix
index 60123d6b87d..fbb8cb034a5 100644
--- a/pkgs/development/python-modules/robotframework-seleniumlibrary/default.nix
+++ b/pkgs/development/python-modules/robotframework-seleniumlibrary/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub, python, robotframework, selenium, mockito, robotstatuschecker, approvaltests }:
+{ lib, buildPythonPackage, fetchFromGitHub, python, robotframework, selenium, mockito, robotstatuschecker, approvaltests }:
 
 buildPythonPackage rec {
   version = "3.3.1";
diff --git a/pkgs/development/python-modules/robotframework-sshlibrary/default.nix b/pkgs/development/python-modules/robotframework-sshlibrary/default.nix
index 7e3bcbcc55d..62fb43e0269 100644
--- a/pkgs/development/python-modules/robotframework-sshlibrary/default.nix
+++ b/pkgs/development/python-modules/robotframework-sshlibrary/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , robotframework
diff --git a/pkgs/development/python-modules/robotframework-tools/default.nix b/pkgs/development/python-modules/robotframework-tools/default.nix
index 5bc7bbceae7..9b90b25bfb7 100644
--- a/pkgs/development/python-modules/robotframework-tools/default.nix
+++ b/pkgs/development/python-modules/robotframework-tools/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy3k
diff --git a/pkgs/development/python-modules/robotframework/default.nix b/pkgs/development/python-modules/robotframework/default.nix
index 953602ca1ad..cc57fa0d026 100644
--- a/pkgs/development/python-modules/robotframework/default.nix
+++ b/pkgs/development/python-modules/robotframework/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage }:
+{ lib, fetchPypi, buildPythonPackage }:
 
 buildPythonPackage rec {
   pname = "robotframework";
diff --git a/pkgs/development/python-modules/robotstatuschecker/default.nix b/pkgs/development/python-modules/robotstatuschecker/default.nix
index b0bd44f9c15..81226a23452 100644
--- a/pkgs/development/python-modules/robotstatuschecker/default.nix
+++ b/pkgs/development/python-modules/robotstatuschecker/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub, python, robotframework }:
+{ lib, buildPythonPackage, fetchFromGitHub, python, robotframework }:
 
 buildPythonPackage rec {
   version = "1.3";
diff --git a/pkgs/development/python-modules/robotsuite/default.nix b/pkgs/development/python-modules/robotsuite/default.nix
index 126153ec50e..5c46686adae 100644
--- a/pkgs/development/python-modules/robotsuite/default.nix
+++ b/pkgs/development/python-modules/robotsuite/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , unittest2, lxml, robotframework
 }:
 
diff --git a/pkgs/development/python-modules/roku/default.nix b/pkgs/development/python-modules/roku/default.nix
index 5e3644468fe..c82eda6e35c 100644
--- a/pkgs/development/python-modules/roku/default.nix
+++ b/pkgs/development/python-modules/roku/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, buildPythonPackage, requests, pytest, flask, isPy27
+{ lib, fetchFromGitHub, buildPythonPackage, requests, pytest, flask, isPy27
 }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/roman/default.nix b/pkgs/development/python-modules/roman/default.nix
index 33f0f7f18d7..cde0ab0f271 100644
--- a/pkgs/development/python-modules/roman/default.nix
+++ b/pkgs/development/python-modules/roman/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/rope/default.nix b/pkgs/development/python-modules/rope/default.nix
index 65edd602d8d..c4e451aade5 100644
--- a/pkgs/development/python-modules/rope/default.nix
+++ b/pkgs/development/python-modules/rope/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, pythonAtLeast, nose }:
+{ lib, buildPythonPackage, fetchPypi, pythonAtLeast, nose }:
 
 buildPythonPackage rec {
   pname = "rope";
diff --git a/pkgs/development/python-modules/ropper/default.nix b/pkgs/development/python-modules/ropper/default.nix
index 8b193caa7b8..5a472ceb180 100644
--- a/pkgs/development/python-modules/ropper/default.nix
+++ b/pkgs/development/python-modules/ropper/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonApplication
 , fetchPypi
 , capstone
diff --git a/pkgs/development/python-modules/routes/default.nix b/pkgs/development/python-modules/routes/default.nix
index 0129ef69e2c..1176fcb4eb0 100644
--- a/pkgs/development/python-modules/routes/default.nix
+++ b/pkgs/development/python-modules/routes/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , repoze_lru
diff --git a/pkgs/development/python-modules/rpdb/default.nix b/pkgs/development/python-modules/rpdb/default.nix
index fb84adb7d24..69a886f6e0d 100644
--- a/pkgs/development/python-modules/rpdb/default.nix
+++ b/pkgs/development/python-modules/rpdb/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/rpkg/default.nix b/pkgs/development/python-modules/rpkg/default.nix
index 731a5738e73..5f1cfc622c9 100644
--- a/pkgs/development/python-modules/rpkg/default.nix
+++ b/pkgs/development/python-modules/rpkg/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, isPy3k, fetchurl, six, pycurl, cccolutils
+{ lib, buildPythonPackage, isPy3k, fetchurl, six, pycurl, cccolutils
 , koji, rpmfluff }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/rply/default.nix b/pkgs/development/python-modules/rply/default.nix
index 0da9d2b7101..33f8547496d 100644
--- a/pkgs/development/python-modules/rply/default.nix
+++ b/pkgs/development/python-modules/rply/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, pytest, fetchFromGitHub, buildPythonPackage, appdirs }:
+{ lib, pytest, fetchFromGitHub, buildPythonPackage, appdirs }:
 
 buildPythonPackage rec {
   pname = "rply";
diff --git a/pkgs/development/python-modules/rpmfluff/default.nix b/pkgs/development/python-modules/rpmfluff/default.nix
index 96050ba14b0..9957393770b 100644
--- a/pkgs/development/python-modules/rpmfluff/default.nix
+++ b/pkgs/development/python-modules/rpmfluff/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchurl
 , glibcLocales
diff --git a/pkgs/development/python-modules/rq/default.nix b/pkgs/development/python-modules/rq/default.nix
index c9ca5977cb1..8ec05aae9d5 100644
--- a/pkgs/development/python-modules/rq/default.nix
+++ b/pkgs/development/python-modules/rq/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, buildPythonPackage, isPy27, click, redis }:
+{ lib, fetchFromGitHub, buildPythonPackage, isPy27, click, redis }:
 
 buildPythonPackage rec {
   pname = "rq";
diff --git a/pkgs/development/python-modules/rsa/4_0.nix b/pkgs/development/python-modules/rsa/4_0.nix
index 8400647aaad..1a9ad2171a0 100644
--- a/pkgs/development/python-modules/rsa/4_0.nix
+++ b/pkgs/development/python-modules/rsa/4_0.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , unittest2
diff --git a/pkgs/development/python-modules/rsa/default.nix b/pkgs/development/python-modules/rsa/default.nix
index b688369beb5..7a990061e00 100644
--- a/pkgs/development/python-modules/rsa/default.nix
+++ b/pkgs/development/python-modules/rsa/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , unittest2
diff --git a/pkgs/development/python-modules/rtslib/default.nix b/pkgs/development/python-modules/rtslib/default.nix
index e53756b0181..e6289378c96 100644
--- a/pkgs/development/python-modules/rtslib/default.nix
+++ b/pkgs/development/python-modules/rtslib/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, buildPythonPackage, six, pyudev, pygobject3 }:
+{ lib, fetchFromGitHub, buildPythonPackage, six, pyudev, pygobject3 }:
 
 buildPythonPackage rec {
   pname = "rtslib";
diff --git a/pkgs/development/python-modules/ruamel_base/default.nix b/pkgs/development/python-modules/ruamel_base/default.nix
index 950f523f4a9..1f829bb4e0b 100644
--- a/pkgs/development/python-modules/ruamel_base/default.nix
+++ b/pkgs/development/python-modules/ruamel_base/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/ruamel_ordereddict/default.nix b/pkgs/development/python-modules/ruamel_ordereddict/default.nix
index 1e5820a37f7..98c36221dcd 100644
--- a/pkgs/development/python-modules/ruamel_ordereddict/default.nix
+++ b/pkgs/development/python-modules/ruamel_ordereddict/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy3k
diff --git a/pkgs/development/python-modules/ruamel_yaml_clib/default.nix b/pkgs/development/python-modules/ruamel_yaml_clib/default.nix
index debf2aaf774..8304f5d7dad 100644
--- a/pkgs/development/python-modules/ruamel_yaml_clib/default.nix
+++ b/pkgs/development/python-modules/ruamel_yaml_clib/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchhg
 , ruamel_base
diff --git a/pkgs/development/python-modules/rubymarshal/default.nix b/pkgs/development/python-modules/rubymarshal/default.nix
index edb793c19d5..51cec6f8602 100644
--- a/pkgs/development/python-modules/rubymarshal/default.nix
+++ b/pkgs/development/python-modules/rubymarshal/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, hypothesis, isPy3k }:
+{ lib, buildPythonPackage, fetchPypi, hypothesis, isPy3k }:
 
 buildPythonPackage rec {
   pname = "rubymarshal";
diff --git a/pkgs/development/python-modules/runsnakerun/default.nix b/pkgs/development/python-modules/runsnakerun/default.nix
index 1475b003231..ace9b8269c5 100644
--- a/pkgs/development/python-modules/runsnakerun/default.nix
+++ b/pkgs/development/python-modules/runsnakerun/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , squaremap
diff --git a/pkgs/development/python-modules/s3fs/default.nix b/pkgs/development/python-modules/s3fs/default.nix
index 0154059c4f7..9bb2a513174 100644
--- a/pkgs/development/python-modules/s3fs/default.nix
+++ b/pkgs/development/python-modules/s3fs/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, docutils, aiobotocore, fsspec }:
+{ lib, buildPythonPackage, fetchPypi, docutils, aiobotocore, fsspec }:
 
 buildPythonPackage rec {
   pname = "s3fs";
diff --git a/pkgs/development/python-modules/sacremoses/default.nix b/pkgs/development/python-modules/sacremoses/default.nix
index 9f97757edad..4ffea014001 100644
--- a/pkgs/development/python-modules/sacremoses/default.nix
+++ b/pkgs/development/python-modules/sacremoses/default.nix
@@ -1,5 +1,5 @@
 { buildPythonPackage
-, lib, stdenv
+, lib
 , fetchFromGitHub
 , click
 , six
diff --git a/pkgs/development/python-modules/safe/default.nix b/pkgs/development/python-modules/safe/default.nix
index d167760c3e0..6a4515b90f8 100644
--- a/pkgs/development/python-modules/safe/default.nix
+++ b/pkgs/development/python-modules/safe/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , nose
diff --git a/pkgs/development/python-modules/salmon-mail/default.nix b/pkgs/development/python-modules/salmon-mail/default.nix
index 5e6aa5927ec..0b8edf8bdd9 100644
--- a/pkgs/development/python-modules/salmon-mail/default.nix
+++ b/pkgs/development/python-modules/salmon-mail/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, dnspython, chardet, lmtpd
+{ lib, buildPythonPackage, fetchPypi, dnspython, chardet, lmtpd
 , python-daemon, six, jinja2, mock, click }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/samplerate/default.nix b/pkgs/development/python-modules/samplerate/default.nix
index a4a19f7ad12..9c26c9e2e2b 100644
--- a/pkgs/development/python-modules/samplerate/default.nix
+++ b/pkgs/development/python-modules/samplerate/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , numpy
 , pkgs
diff --git a/pkgs/development/python-modules/sandboxlib/default.nix b/pkgs/development/python-modules/sandboxlib/default.nix
index 42872e31891..1be4c485b80 100644
--- a/pkgs/development/python-modules/sandboxlib/default.nix
+++ b/pkgs/development/python-modules/sandboxlib/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pbr
diff --git a/pkgs/development/python-modules/sapi-python-client/default.nix b/pkgs/development/python-modules/sapi-python-client/default.nix
index 8a7a62d8ce8..222b4c60c7f 100644
--- a/pkgs/development/python-modules/sapi-python-client/default.nix
+++ b/pkgs/development/python-modules/sapi-python-client/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, git, setuptools, setuptools_scm, fetchFromGitHub, requests, boto3, buildPythonPackage, responses }:
+{ lib, git, setuptools, setuptools_scm, fetchFromGitHub, requests, boto3, buildPythonPackage, responses }:
 
 buildPythonPackage rec {
     pname = "sapi-python-client";
diff --git a/pkgs/development/python-modules/scales/default.nix b/pkgs/development/python-modules/scales/default.nix
index 5aae6297268..3806ffb9d46 100644
--- a/pkgs/development/python-modules/scales/default.nix
+++ b/pkgs/development/python-modules/scales/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , nose
diff --git a/pkgs/development/python-modules/schedule/default.nix b/pkgs/development/python-modules/schedule/default.nix
index 596ed993233..2eda0cd6ac9 100644
--- a/pkgs/development/python-modules/schedule/default.nix
+++ b/pkgs/development/python-modules/schedule/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , mock
diff --git a/pkgs/development/python-modules/schema/default.nix b/pkgs/development/python-modules/schema/default.nix
index 1502c7d10ab..483a891f933 100644
--- a/pkgs/development/python-modules/schema/default.nix
+++ b/pkgs/development/python-modules/schema/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, contextlib2, pytest, mock }:
+{ lib, buildPythonPackage, fetchPypi, contextlib2, pytest, mock }:
 
 buildPythonPackage rec {
 
diff --git a/pkgs/development/python-modules/scikit-bio/default.nix b/pkgs/development/python-modules/scikit-bio/default.nix
index 8fa0186498f..f14c4d82f42 100644
--- a/pkgs/development/python-modules/scikit-bio/default.nix
+++ b/pkgs/development/python-modules/scikit-bio/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , cython
diff --git a/pkgs/development/python-modules/scikits-odes/default.nix b/pkgs/development/python-modules/scikits-odes/default.nix
index 383cf1f70c6..8921e0061aa 100644
--- a/pkgs/development/python-modules/scikits-odes/default.nix
+++ b/pkgs/development/python-modules/scikits-odes/default.nix
@@ -1,5 +1,4 @@
-{ stdenv
-, lib
+{ lib
 , buildPythonPackage
 , fetchPypi
 , fetchurl
diff --git a/pkgs/development/python-modules/scp/default.nix b/pkgs/development/python-modules/scp/default.nix
index f5cd96e71aa..abbe932c267 100644
--- a/pkgs/development/python-modules/scp/default.nix
+++ b/pkgs/development/python-modules/scp/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , paramiko
diff --git a/pkgs/development/python-modules/scrapy-deltafetch/default.nix b/pkgs/development/python-modules/scrapy-deltafetch/default.nix
index 900943a0e15..006c8ed0302 100644
--- a/pkgs/development/python-modules/scrapy-deltafetch/default.nix
+++ b/pkgs/development/python-modules/scrapy-deltafetch/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, fetchPypi, buildPythonPackage, scrapy, bsddb3 }:
+{ lib, fetchPypi, buildPythonPackage, scrapy, bsddb3 }:
 
 buildPythonPackage rec {
   pname = "scrapy-deltafetch";
diff --git a/pkgs/development/python-modules/scrapy-fake-useragent/default.nix b/pkgs/development/python-modules/scrapy-fake-useragent/default.nix
index 4f6eecfe914..f9f896a563b 100644
--- a/pkgs/development/python-modules/scrapy-fake-useragent/default.nix
+++ b/pkgs/development/python-modules/scrapy-fake-useragent/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, buildPythonPackage, pytestCheckHook, pytestcov, pytest-mock, fake-useragent, faker, scrapy }:
+{ lib, fetchFromGitHub, buildPythonPackage, pytestCheckHook, pytestcov, pytest-mock, fake-useragent, faker, scrapy }:
 
 buildPythonPackage rec {
   pname = "scrapy-fake-useragent";
diff --git a/pkgs/development/python-modules/scrapy-splash/default.nix b/pkgs/development/python-modules/scrapy-splash/default.nix
index ab00377f4a0..5f6721f8162 100644
--- a/pkgs/development/python-modules/scrapy-splash/default.nix
+++ b/pkgs/development/python-modules/scrapy-splash/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, fetchPypi, buildPythonPackage, scrapy, six }:
+{ lib, fetchPypi, buildPythonPackage, scrapy, six }:
 
 buildPythonPackage rec {
   pname = "scrapy-splash";
diff --git a/pkgs/development/python-modules/screeninfo/default.nix b/pkgs/development/python-modules/screeninfo/default.nix
index f71f8d0c263..5f238a7e05f 100644
--- a/pkgs/development/python-modules/screeninfo/default.nix
+++ b/pkgs/development/python-modules/screeninfo/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonApplication, fetchPypi, isPy27, isPy36, dataclasses, libX11, libXinerama, libXrandr }:
+{ lib, buildPythonApplication, fetchPypi, isPy27, isPy36, dataclasses, libX11, libXinerama, libXrandr }:
 
 buildPythonApplication rec {
   pname = "screeninfo";
diff --git a/pkgs/development/python-modules/scripttest/default.nix b/pkgs/development/python-modules/scripttest/default.nix
index ab234ce2243..5fe4b2b2ee6 100644
--- a/pkgs/development/python-modules/scripttest/default.nix
+++ b/pkgs/development/python-modules/scripttest/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pytest
diff --git a/pkgs/development/python-modules/sdnotify/default.nix b/pkgs/development/python-modules/sdnotify/default.nix
index 0003d9c0131..a447283c63a 100644
--- a/pkgs/development/python-modules/sdnotify/default.nix
+++ b/pkgs/development/python-modules/sdnotify/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/seabreeze/default.nix b/pkgs/development/python-modules/seabreeze/default.nix
index cc9594d0452..f4a4955a739 100644
--- a/pkgs/development/python-modules/seabreeze/default.nix
+++ b/pkgs/development/python-modules/seabreeze/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , fetchFromGitHub
 , buildPythonPackage
 , pyusb
diff --git a/pkgs/development/python-modules/seekpath/default.nix b/pkgs/development/python-modules/seekpath/default.nix
index 637b55eec8d..dbfe4510776 100644
--- a/pkgs/development/python-modules/seekpath/default.nix
+++ b/pkgs/development/python-modules/seekpath/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub, pythonOlder, numpy, future, spglib, glibcLocales, pytest, scipy }:
+{ lib, buildPythonPackage, fetchFromGitHub, pythonOlder, numpy, future, spglib, glibcLocales, pytest, scipy }:
 
 buildPythonPackage rec {
   pname = "seekpath";
diff --git a/pkgs/development/python-modules/selectors2/default.nix b/pkgs/development/python-modules/selectors2/default.nix
index ff6b81d3105..bd3f77b5b08 100644
--- a/pkgs/development/python-modules/selectors2/default.nix
+++ b/pkgs/development/python-modules/selectors2/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , nose, psutil, mock }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/selectors34/default.nix b/pkgs/development/python-modules/selectors34/default.nix
index ea3b403fdae..2209ccf43d2 100644
--- a/pkgs/development/python-modules/selectors34/default.nix
+++ b/pkgs/development/python-modules/selectors34/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , python
diff --git a/pkgs/development/python-modules/semantic/default.nix b/pkgs/development/python-modules/semantic/default.nix
index 83e4879e1fd..518b7637ad7 100644
--- a/pkgs/development/python-modules/semantic/default.nix
+++ b/pkgs/development/python-modules/semantic/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy3k
diff --git a/pkgs/development/python-modules/semver/default.nix b/pkgs/development/python-modules/semver/default.nix
index 71ec776db7c..c281a6d6b0d 100644
--- a/pkgs/development/python-modules/semver/default.nix
+++ b/pkgs/development/python-modules/semver/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , fetchFromGitHub
 , buildPythonPackage
 , pytestCheckHook
diff --git a/pkgs/development/python-modules/sentencepiece/default.nix b/pkgs/development/python-modules/sentencepiece/default.nix
index dd324260f83..c1ad64b3f5e 100644
--- a/pkgs/development/python-modules/sentencepiece/default.nix
+++ b/pkgs/development/python-modules/sentencepiece/default.nix
@@ -1,5 +1,5 @@
 { buildPythonPackage
-, stdenv
+
 , sentencepiece
 , pkg-config
 }:
diff --git a/pkgs/development/python-modules/sentry-sdk/default.nix b/pkgs/development/python-modules/sentry-sdk/default.nix
index ea9bbc1f0c3..b3a1c4ee2f4 100644
--- a/pkgs/development/python-modules/sentry-sdk/default.nix
+++ b/pkgs/development/python-modules/sentry-sdk/default.nix
@@ -17,7 +17,7 @@
 , rq
 , sanic
 , sqlalchemy
-, lib, stdenv
+, lib
 , tornado
 , urllib3
 , trytond
diff --git a/pkgs/development/python-modules/sepaxml/default.nix b/pkgs/development/python-modules/sepaxml/default.nix
index 095b47db2bf..8f6d4eb94f5 100644
--- a/pkgs/development/python-modules/sepaxml/default.nix
+++ b/pkgs/development/python-modules/sepaxml/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub, isPy27
+{ lib, buildPythonPackage, fetchFromGitHub, isPy27
 , lxml
 , pytest
 , text-unidecode
diff --git a/pkgs/development/python-modules/seqdiag/default.nix b/pkgs/development/python-modules/seqdiag/default.nix
index ba4cdca0c63..2ae9defc504 100644
--- a/pkgs/development/python-modules/seqdiag/default.nix
+++ b/pkgs/development/python-modules/seqdiag/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, buildPythonPackage, isPy27, pep8, nose, unittest2, docutils
+{ lib, fetchurl, buildPythonPackage, isPy27, pep8, nose, unittest2, docutils
 , blockdiag
 }:
 
diff --git a/pkgs/development/python-modules/serpent/default.nix b/pkgs/development/python-modules/serpent/default.nix
index 36840813b40..50f6e0b63a6 100644
--- a/pkgs/development/python-modules/serpent/default.nix
+++ b/pkgs/development/python-modules/serpent/default.nix
@@ -1,7 +1,6 @@
-{ stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
-, lib
 , python
 , isPy27
 , enum34
diff --git a/pkgs/development/python-modules/serversyncstorage/default.nix b/pkgs/development/python-modules/serversyncstorage/default.nix
index fa212d6a4de..a409d48837e 100644
--- a/pkgs/development/python-modules/serversyncstorage/default.nix
+++ b/pkgs/development/python-modules/serversyncstorage/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 , isPy27
diff --git a/pkgs/development/python-modules/setproctitle/default.nix b/pkgs/development/python-modules/setproctitle/default.nix
index a9c0e7fda89..9338166efef 100644
--- a/pkgs/development/python-modules/setproctitle/default.nix
+++ b/pkgs/development/python-modules/setproctitle/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pytestCheckHook
diff --git a/pkgs/development/python-modules/setuptools-git/default.nix b/pkgs/development/python-modules/setuptools-git/default.nix
index 18fae7b1610..06e699e19a3 100644
--- a/pkgs/development/python-modules/setuptools-git/default.nix
+++ b/pkgs/development/python-modules/setuptools-git/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pkgs
diff --git a/pkgs/development/python-modules/setuptools-lint/default.nix b/pkgs/development/python-modules/setuptools-lint/default.nix
index ba42c21ad36..f1eb2903f03 100644
--- a/pkgs/development/python-modules/setuptools-lint/default.nix
+++ b/pkgs/development/python-modules/setuptools-lint/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, pylint }:
+{ lib, buildPythonPackage, fetchPypi, pylint }:
 
 buildPythonPackage rec {
   pname = "setuptools-lint";
diff --git a/pkgs/development/python-modules/setuptools-rust/default.nix b/pkgs/development/python-modules/setuptools-rust/default.nix
index 2d9a4b17d40..ee4a3b55164 100644
--- a/pkgs/development/python-modules/setuptools-rust/default.nix
+++ b/pkgs/development/python-modules/setuptools-rust/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy27
diff --git a/pkgs/development/python-modules/setuptools-scm-git-archive/default.nix b/pkgs/development/python-modules/setuptools-scm-git-archive/default.nix
index d8558aaf83a..98795eadfd4 100644
--- a/pkgs/development/python-modules/setuptools-scm-git-archive/default.nix
+++ b/pkgs/development/python-modules/setuptools-scm-git-archive/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, setuptools_scm, pytest }:
+{ lib, buildPythonPackage, fetchPypi, setuptools_scm, pytest }:
 
 buildPythonPackage rec {
   pname = "setuptools-scm-git-archive";
diff --git a/pkgs/development/python-modules/setuptools_scm/default.nix b/pkgs/development/python-modules/setuptools_scm/default.nix
index a766bb6c294..ba716c313fd 100644
--- a/pkgs/development/python-modules/setuptools_scm/default.nix
+++ b/pkgs/development/python-modules/setuptools_scm/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, pip, pytest }:
+{ lib, buildPythonPackage, fetchPypi, pip, pytest }:
 
 buildPythonPackage rec {
   pname = "setuptools_scm";
diff --git a/pkgs/development/python-modules/setuptoolsdarcs/default.nix b/pkgs/development/python-modules/setuptoolsdarcs/default.nix
index f6358a831c9..41fe5043ea8 100644
--- a/pkgs/development/python-modules/setuptoolsdarcs/default.nix
+++ b/pkgs/development/python-modules/setuptoolsdarcs/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , darcsver
diff --git a/pkgs/development/python-modules/setuptoolstrial/default.nix b/pkgs/development/python-modules/setuptoolstrial/default.nix
index 1d29f77cf0f..bef492e5dbc 100644
--- a/pkgs/development/python-modules/setuptoolstrial/default.nix
+++ b/pkgs/development/python-modules/setuptoolstrial/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pytest
diff --git a/pkgs/development/python-modules/sexpdata/default.nix b/pkgs/development/python-modules/sexpdata/default.nix
index 89f716d9be2..fd7d99fbb3f 100644
--- a/pkgs/development/python-modules/sexpdata/default.nix
+++ b/pkgs/development/python-modules/sexpdata/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/sgmllib3k/default.nix b/pkgs/development/python-modules/sgmllib3k/default.nix
index 6884bed2748..1104c843c6e 100644
--- a/pkgs/development/python-modules/sgmllib3k/default.nix
+++ b/pkgs/development/python-modules/sgmllib3k/default.nix
@@ -1,8 +1,7 @@
-{ stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 , isPy27
-, lib
 }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/shap/default.nix b/pkgs/development/python-modules/shap/default.nix
index 1ce9a879ee1..cfbd6f92b04 100644
--- a/pkgs/development/python-modules/shap/default.nix
+++ b/pkgs/development/python-modules/shap/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 , isPy27
diff --git a/pkgs/development/python-modules/shellingham/default.nix b/pkgs/development/python-modules/shellingham/default.nix
index 77a4b98f54c..300368b31f1 100644
--- a/pkgs/development/python-modules/shellingham/default.nix
+++ b/pkgs/development/python-modules/shellingham/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/shippai/default.nix b/pkgs/development/python-modules/shippai/default.nix
index 8fd15b71a01..e7efb1ef2dc 100644
--- a/pkgs/development/python-modules/shippai/default.nix
+++ b/pkgs/development/python-modules/shippai/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "shippai";
diff --git a/pkgs/development/python-modules/shortuuid/default.nix b/pkgs/development/python-modules/shortuuid/default.nix
index 35401afa6e3..f1c1efbc0ec 100644
--- a/pkgs/development/python-modules/shortuuid/default.nix
+++ b/pkgs/development/python-modules/shortuuid/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , isPy3k
 , fetchPypi
diff --git a/pkgs/development/python-modules/should-dsl/default.nix b/pkgs/development/python-modules/should-dsl/default.nix
index 1499f1ce4bc..7510ba88d1d 100644
--- a/pkgs/development/python-modules/should-dsl/default.nix
+++ b/pkgs/development/python-modules/should-dsl/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "should-dsl";
diff --git a/pkgs/development/python-modules/shouldbe/default.nix b/pkgs/development/python-modules/shouldbe/default.nix
index 9959f26036c..b733c1c9516 100644
--- a/pkgs/development/python-modules/shouldbe/default.nix
+++ b/pkgs/development/python-modules/shouldbe/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , pythonAtLeast
 , fetchPypi
diff --git a/pkgs/development/python-modules/signedjson/default.nix b/pkgs/development/python-modules/signedjson/default.nix
index 12614a3446b..2f47113408e 100644
--- a/pkgs/development/python-modules/signedjson/default.nix
+++ b/pkgs/development/python-modules/signedjson/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 , canonicaljson
diff --git a/pkgs/development/python-modules/sigtools/default.nix b/pkgs/development/python-modules/sigtools/default.nix
index 0c11a2b6c56..1d81ba5180c 100644
--- a/pkgs/development/python-modules/sigtools/default.nix
+++ b/pkgs/development/python-modules/sigtools/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , repeated_test
diff --git a/pkgs/development/python-modules/simanneal/default.nix b/pkgs/development/python-modules/simanneal/default.nix
index 958f53be567..2d29797b28f 100644
--- a/pkgs/development/python-modules/simanneal/default.nix
+++ b/pkgs/development/python-modules/simanneal/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, buildPythonPackage, pytest }:
+{ lib, fetchFromGitHub, buildPythonPackage, pytest }:
 
 buildPythonPackage rec {
   pname = "simanneal";
diff --git a/pkgs/development/python-modules/simple-websocket-server/default.nix b/pkgs/development/python-modules/simple-websocket-server/default.nix
index f8d579b6088..7228e6d9f3e 100644
--- a/pkgs/development/python-modules/simple-websocket-server/default.nix
+++ b/pkgs/development/python-modules/simple-websocket-server/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub }:
+{ lib, buildPythonPackage, fetchFromGitHub }:
 
 buildPythonPackage {
   pname = "simple-websocket-server";
diff --git a/pkgs/development/python-modules/simpleai/default.nix b/pkgs/development/python-modules/simpleai/default.nix
index 0786ebfae6e..2ad7fe9ba28 100644
--- a/pkgs/development/python-modules/simpleai/default.nix
+++ b/pkgs/development/python-modules/simpleai/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , numpy
diff --git a/pkgs/development/python-modules/simplebayes/default.nix b/pkgs/development/python-modules/simplebayes/default.nix
index ed86b48fc07..06fe8e236b3 100644
--- a/pkgs/development/python-modules/simplebayes/default.nix
+++ b/pkgs/development/python-modules/simplebayes/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 , nose
diff --git a/pkgs/development/python-modules/simpleparse/default.nix b/pkgs/development/python-modules/simpleparse/default.nix
index 6395f4af223..e81a7d41b7a 100644
--- a/pkgs/development/python-modules/simpleparse/default.nix
+++ b/pkgs/development/python-modules/simpleparse/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy3k
diff --git a/pkgs/development/python-modules/skein/default.nix b/pkgs/development/python-modules/skein/default.nix
index 40a17926427..ad7cc021439 100644
--- a/pkgs/development/python-modules/skein/default.nix
+++ b/pkgs/development/python-modules/skein/default.nix
@@ -5,7 +5,7 @@
 , jre
 , lib
 , pythonPackages
-, stdenv
+
 }:
 
 let
diff --git a/pkgs/development/python-modules/sklearn-deap/default.nix b/pkgs/development/python-modules/sklearn-deap/default.nix
index 36ec8b18ca7..958fc613f6f 100644
--- a/pkgs/development/python-modules/sklearn-deap/default.nix
+++ b/pkgs/development/python-modules/sklearn-deap/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub, fetchpatch, numpy, scipy, deap, scikitlearn, python }:
+{ lib, buildPythonPackage, fetchFromGitHub, fetchpatch, numpy, scipy, deap, scikitlearn, python }:
 
 buildPythonPackage rec {
   pname = "sklearn-deap";
diff --git a/pkgs/development/python-modules/slackclient/default.nix b/pkgs/development/python-modules/slackclient/default.nix
index 571398b783d..a690788095e 100644
--- a/pkgs/development/python-modules/slackclient/default.nix
+++ b/pkgs/development/python-modules/slackclient/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 , aiohttp
diff --git a/pkgs/development/python-modules/sleekxmpp/default.nix b/pkgs/development/python-modules/sleekxmpp/default.nix
index e6d5e59a80e..07be197f276 100644
--- a/pkgs/development/python-modules/sleekxmpp/default.nix
+++ b/pkgs/development/python-modules/sleekxmpp/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage, dns, pyasn1 }:
+{ lib, fetchPypi, buildPythonPackage, dns, pyasn1 }:
 
 buildPythonPackage rec {
   pname = "sleekxmpp";
diff --git a/pkgs/development/python-modules/slicer/default.nix b/pkgs/development/python-modules/slicer/default.nix
index b5521f415d7..83f3e412ddc 100644
--- a/pkgs/development/python-modules/slicer/default.nix
+++ b/pkgs/development/python-modules/slicer/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy27
diff --git a/pkgs/development/python-modules/slicerator/default.nix b/pkgs/development/python-modules/slicerator/default.nix
index 39669220003..191159a648e 100644
--- a/pkgs/development/python-modules/slicerator/default.nix
+++ b/pkgs/development/python-modules/slicerator/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , python
diff --git a/pkgs/development/python-modules/slob/default.nix b/pkgs/development/python-modules/slob/default.nix
index a7520c62a62..0caec499a95 100644
--- a/pkgs/development/python-modules/slob/default.nix
+++ b/pkgs/development/python-modules/slob/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 , isPy3k
diff --git a/pkgs/development/python-modules/slowaes/default.nix b/pkgs/development/python-modules/slowaes/default.nix
index 5d738fea57e..ddca8509744 100644
--- a/pkgs/development/python-modules/slowaes/default.nix
+++ b/pkgs/development/python-modules/slowaes/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy3k
diff --git a/pkgs/development/python-modules/smartdc/default.nix b/pkgs/development/python-modules/smartdc/default.nix
index 0b36a7e9f6e..ceba9eae9e4 100644
--- a/pkgs/development/python-modules/smartdc/default.nix
+++ b/pkgs/development/python-modules/smartdc/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , requests
diff --git a/pkgs/development/python-modules/smartypants/default.nix b/pkgs/development/python-modules/smartypants/default.nix
index a497f3db413..d1e11e30d61 100644
--- a/pkgs/development/python-modules/smartypants/default.nix
+++ b/pkgs/development/python-modules/smartypants/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchhg
 , isPyPy
diff --git a/pkgs/development/python-modules/snakeviz/default.nix b/pkgs/development/python-modules/snakeviz/default.nix
index 2c54f65d9c3..42602f15e9b 100644
--- a/pkgs/development/python-modules/snakeviz/default.nix
+++ b/pkgs/development/python-modules/snakeviz/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage, tornado }:
+{ lib, fetchPypi, buildPythonPackage, tornado }:
 
 buildPythonPackage rec {
   pname = "snakeviz";
diff --git a/pkgs/development/python-modules/snapcast/default.nix b/pkgs/development/python-modules/snapcast/default.nix
index 8446683cb1a..c5df9f7d991 100644
--- a/pkgs/development/python-modules/snapcast/default.nix
+++ b/pkgs/development/python-modules/snapcast/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, isPy3k, pytest
+{ lib, buildPythonPackage, fetchPypi, isPy3k, pytest
 , construct }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/snowballstemmer/default.nix b/pkgs/development/python-modules/snowballstemmer/default.nix
index 3364470da1b..84b2bb2e143 100644
--- a/pkgs/development/python-modules/snowballstemmer/default.nix
+++ b/pkgs/development/python-modules/snowballstemmer/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, PyStemmer, fetchPypi }:
+{ lib, buildPythonPackage, PyStemmer, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "snowballstemmer";
diff --git a/pkgs/development/python-modules/socksipy-branch/default.nix b/pkgs/development/python-modules/socksipy-branch/default.nix
index ca9d8707ac6..abfee3718b5 100644
--- a/pkgs/development/python-modules/socksipy-branch/default.nix
+++ b/pkgs/development/python-modules/socksipy-branch/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/somajo/default.nix b/pkgs/development/python-modules/somajo/default.nix
index bd351b5e86f..ba1dd1c3011 100644
--- a/pkgs/development/python-modules/somajo/default.nix
+++ b/pkgs/development/python-modules/somajo/default.nix
@@ -1,4 +1,4 @@
-{ pkgs, lib, stdenv, fetchFromGitHub, buildPythonPackage, isPy3k, regex }:
+{ pkgs, lib, fetchFromGitHub, buildPythonPackage, isPy3k, regex }:
 
 buildPythonPackage rec {
   pname = "SoMaJo";
diff --git a/pkgs/development/python-modules/sopel/default.nix b/pkgs/development/python-modules/sopel/default.nix
index 095c0917e59..7b549933588 100644
--- a/pkgs/development/python-modules/sopel/default.nix
+++ b/pkgs/development/python-modules/sopel/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, isPyPy
+{ lib, buildPythonPackage, fetchPypi, isPyPy
 , dnspython
 , geoip2
 , ipython
diff --git a/pkgs/development/python-modules/sorl_thumbnail/default.nix b/pkgs/development/python-modules/sorl_thumbnail/default.nix
index e918a1aee3b..daeca60c1e1 100644
--- a/pkgs/development/python-modules/sorl_thumbnail/default.nix
+++ b/pkgs/development/python-modules/sorl_thumbnail/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy27
diff --git a/pkgs/development/python-modules/spark_parser/default.nix b/pkgs/development/python-modules/spark_parser/default.nix
index ba927431f2c..fb30daf81fe 100644
--- a/pkgs/development/python-modules/spark_parser/default.nix
+++ b/pkgs/development/python-modules/spark_parser/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , nose
diff --git a/pkgs/development/python-modules/sparqlwrapper/default.nix b/pkgs/development/python-modules/sparqlwrapper/default.nix
index b97cbee2a5f..41c11172d9b 100644
--- a/pkgs/development/python-modules/sparqlwrapper/default.nix
+++ b/pkgs/development/python-modules/sparqlwrapper/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , six
diff --git a/pkgs/development/python-modules/speaklater/default.nix b/pkgs/development/python-modules/speaklater/default.nix
index efb0908dc5f..a9acfb2dbb3 100644
--- a/pkgs/development/python-modules/speaklater/default.nix
+++ b/pkgs/development/python-modules/speaklater/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/spglib/default.nix b/pkgs/development/python-modules/spglib/default.nix
index 08bbb34156b..88da35a0f97 100644
--- a/pkgs/development/python-modules/spglib/default.nix
+++ b/pkgs/development/python-modules/spglib/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, fetchpatch, numpy, nose, pyyaml }:
+{ lib, buildPythonPackage, fetchPypi, fetchpatch, numpy, nose, pyyaml }:
 
 buildPythonPackage rec {
   pname = "spglib";
diff --git a/pkgs/development/python-modules/sphinx_pypi_upload/default.nix b/pkgs/development/python-modules/sphinx_pypi_upload/default.nix
index 77f283795db..d2c20e980e7 100644
--- a/pkgs/development/python-modules/sphinx_pypi_upload/default.nix
+++ b/pkgs/development/python-modules/sphinx_pypi_upload/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/sphinx_rtd_theme/default.nix b/pkgs/development/python-modules/sphinx_rtd_theme/default.nix
index 11e3c2a87e9..87da4131351 100644
--- a/pkgs/development/python-modules/sphinx_rtd_theme/default.nix
+++ b/pkgs/development/python-modules/sphinx_rtd_theme/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , sphinx
diff --git a/pkgs/development/python-modules/sphinxcontrib-applehelp/default.nix b/pkgs/development/python-modules/sphinxcontrib-applehelp/default.nix
index e2bfc5bdaa5..9c3c16657f2 100644
--- a/pkgs/development/python-modules/sphinxcontrib-applehelp/default.nix
+++ b/pkgs/development/python-modules/sphinxcontrib-applehelp/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy27
diff --git a/pkgs/development/python-modules/sphinxcontrib-autoapi/default.nix b/pkgs/development/python-modules/sphinxcontrib-autoapi/default.nix
index 6822c0f153d..068c4d5d2e9 100644
--- a/pkgs/development/python-modules/sphinxcontrib-autoapi/default.nix
+++ b/pkgs/development/python-modules/sphinxcontrib-autoapi/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pythonOlder
diff --git a/pkgs/development/python-modules/sphinxcontrib-blockdiag/default.nix b/pkgs/development/python-modules/sphinxcontrib-blockdiag/default.nix
index a2603b876e5..956e3c033b9 100644
--- a/pkgs/development/python-modules/sphinxcontrib-blockdiag/default.nix
+++ b/pkgs/development/python-modules/sphinxcontrib-blockdiag/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , python
diff --git a/pkgs/development/python-modules/sphinxcontrib-devhelp/default.nix b/pkgs/development/python-modules/sphinxcontrib-devhelp/default.nix
index 7398cbc433f..1f33c06b984 100644
--- a/pkgs/development/python-modules/sphinxcontrib-devhelp/default.nix
+++ b/pkgs/development/python-modules/sphinxcontrib-devhelp/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/sphinxcontrib-htmlhelp/default.nix b/pkgs/development/python-modules/sphinxcontrib-htmlhelp/default.nix
index 150840f19b4..8ca631a2b3c 100644
--- a/pkgs/development/python-modules/sphinxcontrib-htmlhelp/default.nix
+++ b/pkgs/development/python-modules/sphinxcontrib-htmlhelp/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy27
diff --git a/pkgs/development/python-modules/sphinxcontrib-jsmath/default.nix b/pkgs/development/python-modules/sphinxcontrib-jsmath/default.nix
index 609799f1864..cd67732605b 100644
--- a/pkgs/development/python-modules/sphinxcontrib-jsmath/default.nix
+++ b/pkgs/development/python-modules/sphinxcontrib-jsmath/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy27
diff --git a/pkgs/development/python-modules/sphinxcontrib-openapi/default.nix b/pkgs/development/python-modules/sphinxcontrib-openapi/default.nix
index 6375bdab3c2..a9548305d3b 100644
--- a/pkgs/development/python-modules/sphinxcontrib-openapi/default.nix
+++ b/pkgs/development/python-modules/sphinxcontrib-openapi/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy27
diff --git a/pkgs/development/python-modules/sphinxcontrib-qthelp/default.nix b/pkgs/development/python-modules/sphinxcontrib-qthelp/default.nix
index adf02860d12..9d16ede62a2 100644
--- a/pkgs/development/python-modules/sphinxcontrib-qthelp/default.nix
+++ b/pkgs/development/python-modules/sphinxcontrib-qthelp/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy27
diff --git a/pkgs/development/python-modules/sphinxcontrib-serializinghtml/default.nix b/pkgs/development/python-modules/sphinxcontrib-serializinghtml/default.nix
index 52ebe15c1b6..b898e9cb67d 100644
--- a/pkgs/development/python-modules/sphinxcontrib-serializinghtml/default.nix
+++ b/pkgs/development/python-modules/sphinxcontrib-serializinghtml/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy27
diff --git a/pkgs/development/python-modules/sphinxcontrib-spelling/default.nix b/pkgs/development/python-modules/sphinxcontrib-spelling/default.nix
index a3054f34145..2b5beb4df07 100644
--- a/pkgs/development/python-modules/sphinxcontrib-spelling/default.nix
+++ b/pkgs/development/python-modules/sphinxcontrib-spelling/default.nix
@@ -1,5 +1,4 @@
-{ stdenv
-, lib
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pythonOlder
diff --git a/pkgs/development/python-modules/sphinxcontrib_httpdomain/default.nix b/pkgs/development/python-modules/sphinxcontrib_httpdomain/default.nix
index ee652b42d8a..21ada23d47f 100644
--- a/pkgs/development/python-modules/sphinxcontrib_httpdomain/default.nix
+++ b/pkgs/development/python-modules/sphinxcontrib_httpdomain/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , sphinx
diff --git a/pkgs/development/python-modules/sphinxcontrib_newsfeed/default.nix b/pkgs/development/python-modules/sphinxcontrib_newsfeed/default.nix
index 2d56b57df9b..a298025f8ba 100644
--- a/pkgs/development/python-modules/sphinxcontrib_newsfeed/default.nix
+++ b/pkgs/development/python-modules/sphinxcontrib_newsfeed/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , sphinx
diff --git a/pkgs/development/python-modules/sphinxcontrib_plantuml/default.nix b/pkgs/development/python-modules/sphinxcontrib_plantuml/default.nix
index db8997dfd21..e028b6eea80 100644
--- a/pkgs/development/python-modules/sphinxcontrib_plantuml/default.nix
+++ b/pkgs/development/python-modules/sphinxcontrib_plantuml/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , sphinx
diff --git a/pkgs/development/python-modules/spyder-kernels/default.nix b/pkgs/development/python-modules/spyder-kernels/default.nix
index e0a8d6b9c18..9533db6e4a7 100644
--- a/pkgs/development/python-modules/spyder-kernels/default.nix
+++ b/pkgs/development/python-modules/spyder-kernels/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, cloudpickle, ipykernel, wurlitzer,
+{ lib, buildPythonPackage, fetchPypi, cloudpickle, ipykernel, wurlitzer,
   jupyter_client, pyzmq }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/spyder/3.nix b/pkgs/development/python-modules/spyder/3.nix
index 34d59d0eb22..0fb98fa38e3 100644
--- a/pkgs/development/python-modules/spyder/3.nix
+++ b/pkgs/development/python-modules/spyder/3.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub, jedi, pycodestyle,
+{ lib, buildPythonPackage, fetchFromGitHub, jedi, pycodestyle,
   psutil, pyflakes, rope, pylint, keyring, numpydoc,
   qtconsole, qtawesome, nbconvert, mccabe, pyopengl, cloudpickle, pygments,
   spyder-kernels_0_5, qtpy, pyzmq, chardet, pyqtwebengine
diff --git a/pkgs/development/python-modules/spyder/default.nix b/pkgs/development/python-modules/spyder/default.nix
index 26013e71158..e7c94ec724b 100644
--- a/pkgs/development/python-modules/spyder/default.nix
+++ b/pkgs/development/python-modules/spyder/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, isPy27, makeDesktopItem, intervaltree, jedi, pycodestyle,
+{ lib, buildPythonPackage, fetchPypi, isPy27, makeDesktopItem, intervaltree, jedi, pycodestyle,
   psutil, pyflakes, rope, numpy, scipy, matplotlib, pylint, keyring, numpydoc,
   qtconsole, qtawesome, nbconvert, mccabe, pyopengl, cloudpickle, pygments,
   spyder-kernels, qtpy, pyzmq, chardet, qdarkstyle, watchdog, python-language-server
diff --git a/pkgs/development/python-modules/sqlalchemy-continuum/default.nix b/pkgs/development/python-modules/sqlalchemy-continuum/default.nix
index 4050adc29f5..33b408240fc 100644
--- a/pkgs/development/python-modules/sqlalchemy-continuum/default.nix
+++ b/pkgs/development/python-modules/sqlalchemy-continuum/default.nix
@@ -1,5 +1,4 @@
-{ stdenv
-, lib
+{ lib
 , fetchPypi
 , buildPythonPackage
 , flask
diff --git a/pkgs/development/python-modules/sqlalchemy-i18n/default.nix b/pkgs/development/python-modules/sqlalchemy-i18n/default.nix
index 4ef0adefe3e..84be4587e66 100644
--- a/pkgs/development/python-modules/sqlalchemy-i18n/default.nix
+++ b/pkgs/development/python-modules/sqlalchemy-i18n/default.nix
@@ -1,5 +1,4 @@
-{ stdenv
-, lib
+{ lib
 , fetchPypi
 , buildPythonPackage
 , sqlalchemy
diff --git a/pkgs/development/python-modules/sqlalchemy-imageattach/default.nix b/pkgs/development/python-modules/sqlalchemy-imageattach/default.nix
index 6a8c910cfce..15ac7dc3a55 100644
--- a/pkgs/development/python-modules/sqlalchemy-imageattach/default.nix
+++ b/pkgs/development/python-modules/sqlalchemy-imageattach/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , pytest
 , Wand
diff --git a/pkgs/development/python-modules/sqlite3dbm/default.nix b/pkgs/development/python-modules/sqlite3dbm/default.nix
index 1d0b3f15c3f..3057f89adf4 100644
--- a/pkgs/development/python-modules/sqlite3dbm/default.nix
+++ b/pkgs/development/python-modules/sqlite3dbm/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy3k
diff --git a/pkgs/development/python-modules/sqlobject/default.nix b/pkgs/development/python-modules/sqlobject/default.nix
index ccbc6659fe3..f3c438342bc 100644
--- a/pkgs/development/python-modules/sqlobject/default.nix
+++ b/pkgs/development/python-modules/sqlobject/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pytest
diff --git a/pkgs/development/python-modules/squaremap/default.nix b/pkgs/development/python-modules/squaremap/default.nix
index c17a88435dd..bab9e2f99f2 100644
--- a/pkgs/development/python-modules/squaremap/default.nix
+++ b/pkgs/development/python-modules/squaremap/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , isPy3k
 , fetchPypi
diff --git a/pkgs/development/python-modules/srp/default.nix b/pkgs/development/python-modules/srp/default.nix
index 2afbb22d64e..c0d3a0a4aed 100644
--- a/pkgs/development/python-modules/srp/default.nix
+++ b/pkgs/development/python-modules/srp/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, buildPythonPackage, fetchPypi, six, lib }:
+{ buildPythonPackage, fetchPypi, six, lib }:
 
 buildPythonPackage rec {
   pname = "srp";
diff --git a/pkgs/development/python-modules/srptools/default.nix b/pkgs/development/python-modules/srptools/default.nix
index f130009d30d..68ca009d9dc 100644
--- a/pkgs/development/python-modules/srptools/default.nix
+++ b/pkgs/development/python-modules/srptools/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, six, pytest, pytestrunner }:
+{ lib, buildPythonPackage, fetchPypi, six, pytest, pytestrunner }:
 
 buildPythonPackage rec {
   pname = "srptools";
diff --git a/pkgs/development/python-modules/srsly/default.nix b/pkgs/development/python-modules/srsly/default.nix
index 42320e50fa8..86b689d09d1 100644
--- a/pkgs/development/python-modules/srsly/default.nix
+++ b/pkgs/development/python-modules/srsly/default.nix
@@ -1,5 +1,4 @@
-{ stdenv
-, lib
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pythonOlder
diff --git a/pkgs/development/python-modules/srvlookup/default.nix b/pkgs/development/python-modules/srvlookup/default.nix
index c399ee760fd..f325d40ba92 100644
--- a/pkgs/development/python-modules/srvlookup/default.nix
+++ b/pkgs/development/python-modules/srvlookup/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage
+{ lib, fetchPypi, buildPythonPackage
 , dnspython
 , mock, nose
 }:
diff --git a/pkgs/development/python-modules/ssdeep/default.nix b/pkgs/development/python-modules/ssdeep/default.nix
index 8300c3ec2f6..904595865b8 100644
--- a/pkgs/development/python-modules/ssdeep/default.nix
+++ b/pkgs/development/python-modules/ssdeep/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pkgs
diff --git a/pkgs/development/python-modules/ssdp/default.nix b/pkgs/development/python-modules/ssdp/default.nix
index 82ea4b066a3..ac39cffa393 100644
--- a/pkgs/development/python-modules/ssdp/default.nix
+++ b/pkgs/development/python-modules/ssdp/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy27
diff --git a/pkgs/development/python-modules/sseclient/default.nix b/pkgs/development/python-modules/sseclient/default.nix
index 9d944e112fe..6bbeb23ed1f 100644
--- a/pkgs/development/python-modules/sseclient/default.nix
+++ b/pkgs/development/python-modules/sseclient/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, isPy27
+{ lib, buildPythonPackage, fetchPypi, isPy27
 , requests, six
 , backports_unittest-mock, pytestCheckHook, pytestrunner }:
 
diff --git a/pkgs/development/python-modules/sslib/default.nix b/pkgs/development/python-modules/sslib/default.nix
index 026ac8a30b7..407053785f0 100644
--- a/pkgs/development/python-modules/sslib/default.nix
+++ b/pkgs/development/python-modules/sslib/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage, isPy3k }:
+{ lib, fetchPypi, buildPythonPackage, isPy3k }:
 
 buildPythonPackage rec {
   pname = "sslib";
diff --git a/pkgs/development/python-modules/statsd/default.nix b/pkgs/development/python-modules/statsd/default.nix
index 447fed3263c..561a1d14ca4 100644
--- a/pkgs/development/python-modules/statsd/default.nix
+++ b/pkgs/development/python-modules/statsd/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , nose
diff --git a/pkgs/development/python-modules/stompclient/default.nix b/pkgs/development/python-modules/stompclient/default.nix
index 17bafbad282..149be55da58 100644
--- a/pkgs/development/python-modules/stompclient/default.nix
+++ b/pkgs/development/python-modules/stompclient/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy3k
diff --git a/pkgs/development/python-modules/strict-rfc3339/default.nix b/pkgs/development/python-modules/strict-rfc3339/default.nix
index 53701999b02..e76365a525a 100644
--- a/pkgs/development/python-modules/strict-rfc3339/default.nix
+++ b/pkgs/development/python-modules/strict-rfc3339/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "strict-rfc3339";
diff --git a/pkgs/development/python-modules/stringcase/default.nix b/pkgs/development/python-modules/stringcase/default.nix
index 10afb511393..e02cc0384f9 100644
--- a/pkgs/development/python-modules/stringcase/default.nix
+++ b/pkgs/development/python-modules/stringcase/default.nix
@@ -1,4 +1,4 @@
-{ buildPythonPackage, fetchPypi, lib, stdenv
+{ buildPythonPackage, fetchPypi, lib
 }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/subdownloader/default.nix b/pkgs/development/python-modules/subdownloader/default.nix
index 2dac94ac15d..2b536fa0e62 100644
--- a/pkgs/development/python-modules/subdownloader/default.nix
+++ b/pkgs/development/python-modules/subdownloader/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchurl
 , mmpython
diff --git a/pkgs/development/python-modules/suds-jurko/default.nix b/pkgs/development/python-modules/suds-jurko/default.nix
index 4bf74fe00b4..af307919387 100644
--- a/pkgs/development/python-modules/suds-jurko/default.nix
+++ b/pkgs/development/python-modules/suds-jurko/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPyPy
diff --git a/pkgs/development/python-modules/suds/default.nix b/pkgs/development/python-modules/suds/default.nix
index 24425fef95f..1a96df26da1 100644
--- a/pkgs/development/python-modules/suds/default.nix
+++ b/pkgs/development/python-modules/suds/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy3k
diff --git a/pkgs/development/python-modules/sumo/default.nix b/pkgs/development/python-modules/sumo/default.nix
index e647cd4a9d2..e1b3d8c705e 100644
--- a/pkgs/development/python-modules/sumo/default.nix
+++ b/pkgs/development/python-modules/sumo/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub, isPy27
+{ lib, buildPythonPackage, fetchFromGitHub, isPy27
 , h5py
 , matplotlib
 , numpy
diff --git a/pkgs/development/python-modules/sure/default.nix b/pkgs/development/python-modules/sure/default.nix
index efff79f679f..ee21e9c4516 100644
--- a/pkgs/development/python-modules/sure/default.nix
+++ b/pkgs/development/python-modules/sure/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , rednose
diff --git a/pkgs/development/python-modules/survey/default.nix b/pkgs/development/python-modules/survey/default.nix
index f9bec0451ff..436127fae9c 100644
--- a/pkgs/development/python-modules/survey/default.nix
+++ b/pkgs/development/python-modules/survey/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , wrapio
diff --git a/pkgs/development/python-modules/svg-path/default.nix b/pkgs/development/python-modules/svg-path/default.nix
index 585dbf64b3c..820d4121633 100644
--- a/pkgs/development/python-modules/svg-path/default.nix
+++ b/pkgs/development/python-modules/svg-path/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 buildPythonPackage rec {
   pname = "svg.path";
   version = "4.0.2";
diff --git a/pkgs/development/python-modules/svg2tikz/default.nix b/pkgs/development/python-modules/svg2tikz/default.nix
index fb0475ef3b9..38516ab73c3 100644
--- a/pkgs/development/python-modules/svg2tikz/default.nix
+++ b/pkgs/development/python-modules/svg2tikz/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchgit
 , lxml
diff --git a/pkgs/development/python-modules/swagger-ui-bundle/default.nix b/pkgs/development/python-modules/swagger-ui-bundle/default.nix
index 613de201b2d..9dbd29739fe 100644
--- a/pkgs/development/python-modules/swagger-ui-bundle/default.nix
+++ b/pkgs/development/python-modules/swagger-ui-bundle/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, jinja2, flake8 }:
+{ lib, buildPythonPackage, fetchPypi, jinja2, flake8 }:
 
 buildPythonPackage rec {
   pname = "swagger-ui-bundle";
diff --git a/pkgs/development/python-modules/swspotify/default.nix b/pkgs/development/python-modules/swspotify/default.nix
index 321a48e72b6..e213e9e265e 100644
--- a/pkgs/development/python-modules/swspotify/default.nix
+++ b/pkgs/development/python-modules/swspotify/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, buildPythonPackage, fetchFromGitHub, requests, flask-cors, dbus-python, pytestCheckHook, mock, isPy27 }:
+{ lib, buildPythonPackage, fetchFromGitHub, requests, flask-cors, dbus-python, pytestCheckHook, mock, isPy27 }:
 
 buildPythonPackage rec {
   pname = "SwSpotify";
diff --git a/pkgs/development/python-modules/sybase/default.nix b/pkgs/development/python-modules/sybase/default.nix
index 20c2a158a3b..5a14e7e7f40 100644
--- a/pkgs/development/python-modules/sybase/default.nix
+++ b/pkgs/development/python-modules/sybase/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchurl
 , isPy3k
diff --git a/pkgs/development/python-modules/systemd/default.nix b/pkgs/development/python-modules/systemd/default.nix
index 2035ce8b26b..86c330bd1d8 100644
--- a/pkgs/development/python-modules/systemd/default.nix
+++ b/pkgs/development/python-modules/systemd/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub, systemd, pkg-config }:
+{ lib, buildPythonPackage, fetchFromGitHub, systemd, pkg-config }:
 
 buildPythonPackage rec {
   pname = "systemd";
diff --git a/pkgs/development/python-modules/sysv_ipc/default.nix b/pkgs/development/python-modules/sysv_ipc/default.nix
index 87a81e4fb17..5d9b5a034c2 100644
--- a/pkgs/development/python-modules/sysv_ipc/default.nix
+++ b/pkgs/development/python-modules/sysv_ipc/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/tarman/default.nix b/pkgs/development/python-modules/tarman/default.nix
index 682da22ced8..c2a2c4405e2 100644
--- a/pkgs/development/python-modules/tarman/default.nix
+++ b/pkgs/development/python-modules/tarman/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy3k
diff --git a/pkgs/development/python-modules/taskw/default.nix b/pkgs/development/python-modules/taskw/default.nix
index 5a135894713..9e1ae3302c1 100644
--- a/pkgs/development/python-modules/taskw/default.nix
+++ b/pkgs/development/python-modules/taskw/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , nose
diff --git a/pkgs/development/python-modules/tatsu/default.nix b/pkgs/development/python-modules/tatsu/default.nix
index cba34a95a7b..540c315c8ff 100644
--- a/pkgs/development/python-modules/tatsu/default.nix
+++ b/pkgs/development/python-modules/tatsu/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub, pythonOlder
+{ lib, buildPythonPackage, fetchFromGitHub, pythonOlder
 , colorama, mypy, pyyaml, regex
 , dataclasses, typing
 , pytestrunner, pytest-mypy
diff --git a/pkgs/development/python-modules/tblib/default.nix b/pkgs/development/python-modules/tblib/default.nix
index 7e704e0b2c6..2f06b665d33 100644
--- a/pkgs/development/python-modules/tblib/default.nix
+++ b/pkgs/development/python-modules/tblib/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "tblib";
diff --git a/pkgs/development/python-modules/telegram/default.nix b/pkgs/development/python-modules/telegram/default.nix
index 95293d095fd..c297efc0efd 100644
--- a/pkgs/development/python-modules/telegram/default.nix
+++ b/pkgs/development/python-modules/telegram/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/tensorflow-estimator/default.nix b/pkgs/development/python-modules/tensorflow-estimator/default.nix
index bca75224fa3..dd3b4641bea 100644
--- a/pkgs/development/python-modules/tensorflow-estimator/default.nix
+++ b/pkgs/development/python-modules/tensorflow-estimator/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage
+{ lib, fetchPypi, buildPythonPackage
 , numpy
 , absl-py
 , mock
diff --git a/pkgs/development/python-modules/termcolor/default.nix b/pkgs/development/python-modules/termcolor/default.nix
index df0f4d6208a..e440dab114f 100644
--- a/pkgs/development/python-modules/termcolor/default.nix
+++ b/pkgs/development/python-modules/termcolor/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/terminaltables/default.nix b/pkgs/development/python-modules/terminaltables/default.nix
index 28e49316ad7..51a0b071224 100644
--- a/pkgs/development/python-modules/terminaltables/default.nix
+++ b/pkgs/development/python-modules/terminaltables/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/testpath/default.nix b/pkgs/development/python-modules/testpath/default.nix
index a5ab52e5cdd..c95bd0c78b6 100644
--- a/pkgs/development/python-modules/testpath/default.nix
+++ b/pkgs/development/python-modules/testpath/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/testrepository/default.nix b/pkgs/development/python-modules/testrepository/default.nix
index c249ca212b6..45093a5f7cf 100644
--- a/pkgs/development/python-modules/testrepository/default.nix
+++ b/pkgs/development/python-modules/testrepository/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , testtools
diff --git a/pkgs/development/python-modules/testscenarios/default.nix b/pkgs/development/python-modules/testscenarios/default.nix
index 465384edcb0..8df35ac4b88 100644
--- a/pkgs/development/python-modules/testscenarios/default.nix
+++ b/pkgs/development/python-modules/testscenarios/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , testtools
diff --git a/pkgs/development/python-modules/threadpool/default.nix b/pkgs/development/python-modules/threadpool/default.nix
index 7a1696feb66..9c83e7e45c2 100644
--- a/pkgs/development/python-modules/threadpool/default.nix
+++ b/pkgs/development/python-modules/threadpool/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/thrift/default.nix b/pkgs/development/python-modules/thrift/default.nix
index c7279b867b1..7b16d666870 100644
--- a/pkgs/development/python-modules/thrift/default.nix
+++ b/pkgs/development/python-modules/thrift/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , six
diff --git a/pkgs/development/python-modules/thumborpexif/default.nix b/pkgs/development/python-modules/thumborpexif/default.nix
index abfad4ffaac..28b2e5a9f93 100644
--- a/pkgs/development/python-modules/thumborpexif/default.nix
+++ b/pkgs/development/python-modules/thumborpexif/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy27
diff --git a/pkgs/development/python-modules/tilestache/default.nix b/pkgs/development/python-modules/tilestache/default.nix
index 170360c133e..ce46fd56f24 100644
--- a/pkgs/development/python-modules/tilestache/default.nix
+++ b/pkgs/development/python-modules/tilestache/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , modestmaps
diff --git a/pkgs/development/python-modules/timelib/default.nix b/pkgs/development/python-modules/timelib/default.nix
index 65b121ddfaf..e2f3cc1d3cc 100644
--- a/pkgs/development/python-modules/timelib/default.nix
+++ b/pkgs/development/python-modules/timelib/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/timeout-decorator/default.nix b/pkgs/development/python-modules/timeout-decorator/default.nix
index b1160cafe30..c2d21fea153 100644
--- a/pkgs/development/python-modules/timeout-decorator/default.nix
+++ b/pkgs/development/python-modules/timeout-decorator/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 buildPythonPackage rec {
   pname = "timeout-decorator";
   version = "0.5.0";
diff --git a/pkgs/development/python-modules/tissue/default.nix b/pkgs/development/python-modules/tissue/default.nix
index fc4316c98fe..e1ef7f9edf4 100644
--- a/pkgs/development/python-modules/tissue/default.nix
+++ b/pkgs/development/python-modules/tissue/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , nose
diff --git a/pkgs/development/python-modules/tlsh/default.nix b/pkgs/development/python-modules/tlsh/default.nix
index 302b113364d..7be95b97088 100644
--- a/pkgs/development/python-modules/tlsh/default.nix
+++ b/pkgs/development/python-modules/tlsh/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 , cmake
diff --git a/pkgs/development/python-modules/tlslite-ng/default.nix b/pkgs/development/python-modules/tlslite-ng/default.nix
index a952c95d93e..37751890c7b 100644
--- a/pkgs/development/python-modules/tlslite-ng/default.nix
+++ b/pkgs/development/python-modules/tlslite-ng/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , ecdsa
diff --git a/pkgs/development/python-modules/tlslite/default.nix b/pkgs/development/python-modules/tlslite/default.nix
index a1e78c5db76..52b662be2b2 100644
--- a/pkgs/development/python-modules/tlslite/default.nix
+++ b/pkgs/development/python-modules/tlslite/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/toggl-cli/default.nix b/pkgs/development/python-modules/toggl-cli/default.nix
index 875e70cee58..d7eece65002 100644
--- a/pkgs/development/python-modules/toggl-cli/default.nix
+++ b/pkgs/development/python-modules/toggl-cli/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, pythonAtLeast, pythonOlder
+{ lib, buildPythonPackage, fetchPypi, pythonAtLeast, pythonOlder
 , click
 , click-completion
 , factory_boy
diff --git a/pkgs/development/python-modules/tokenizers/default.nix b/pkgs/development/python-modules/tokenizers/default.nix
index ec435a0ac35..cf122613f63 100644
--- a/pkgs/development/python-modules/tokenizers/default.nix
+++ b/pkgs/development/python-modules/tokenizers/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , rustPlatform
 , fetchFromGitHub
 , fetchurl
diff --git a/pkgs/development/python-modules/tokenlib/default.nix b/pkgs/development/python-modules/tokenlib/default.nix
index 2bed1887016..bed053f8282 100644
--- a/pkgs/development/python-modules/tokenlib/default.nix
+++ b/pkgs/development/python-modules/tokenlib/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 , requests
diff --git a/pkgs/development/python-modules/toml/default.nix b/pkgs/development/python-modules/toml/default.nix
index 0d0d87c73d1..bdc1b141eed 100644
--- a/pkgs/development/python-modules/toml/default.nix
+++ b/pkgs/development/python-modules/toml/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "toml";
diff --git a/pkgs/development/python-modules/toposort/default.nix b/pkgs/development/python-modules/toposort/default.nix
index 43df3c4e21e..540835c7e31 100644
--- a/pkgs/development/python-modules/toposort/default.nix
+++ b/pkgs/development/python-modules/toposort/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/torchvision/default.nix b/pkgs/development/python-modules/torchvision/default.nix
index 928616eb4f8..79f6a19ffcb 100644
--- a/pkgs/development/python-modules/torchvision/default.nix
+++ b/pkgs/development/python-modules/torchvision/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 , ninja
diff --git a/pkgs/development/python-modules/traceback2/default.nix b/pkgs/development/python-modules/traceback2/default.nix
index 5309ae47a02..040874286bd 100644
--- a/pkgs/development/python-modules/traceback2/default.nix
+++ b/pkgs/development/python-modules/traceback2/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pbr
diff --git a/pkgs/development/python-modules/tracing/default.nix b/pkgs/development/python-modules/tracing/default.nix
index f4c01f003a9..c2adc9ec9c5 100644
--- a/pkgs/development/python-modules/tracing/default.nix
+++ b/pkgs/development/python-modules/tracing/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchurl
 , sphinx
diff --git a/pkgs/development/python-modules/traits/default.nix b/pkgs/development/python-modules/traits/default.nix
index e3bc8b43fe4..d9986dd87fe 100644
--- a/pkgs/development/python-modules/traits/default.nix
+++ b/pkgs/development/python-modules/traits/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy27
diff --git a/pkgs/development/python-modules/transaction/default.nix b/pkgs/development/python-modules/transaction/default.nix
index def2559a72d..6bb5987ba48 100644
--- a/pkgs/development/python-modules/transaction/default.nix
+++ b/pkgs/development/python-modules/transaction/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , fetchPypi
 , buildPythonPackage
 , zope_interface
diff --git a/pkgs/development/python-modules/transformers/default.nix b/pkgs/development/python-modules/transformers/default.nix
index 59420475440..efc33ad8a23 100644
--- a/pkgs/development/python-modules/transformers/default.nix
+++ b/pkgs/development/python-modules/transformers/default.nix
@@ -1,5 +1,5 @@
 { buildPythonPackage
-, lib, stdenv
+, lib
 , fetchFromGitHub
 , pythonOlder
 , cookiecutter
diff --git a/pkgs/development/python-modules/transip/default.nix b/pkgs/development/python-modules/transip/default.nix
index e270d5a0662..94d3cb85be4 100644
--- a/pkgs/development/python-modules/transip/default.nix
+++ b/pkgs/development/python-modules/transip/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 , isPy27
diff --git a/pkgs/development/python-modules/translationstring/default.nix b/pkgs/development/python-modules/translationstring/default.nix
index 2f39b57b480..f7036128e08 100644
--- a/pkgs/development/python-modules/translationstring/default.nix
+++ b/pkgs/development/python-modules/translationstring/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/transmissionrpc/default.nix b/pkgs/development/python-modules/transmissionrpc/default.nix
index a128b150579..39901a17f00 100644
--- a/pkgs/development/python-modules/transmissionrpc/default.nix
+++ b/pkgs/development/python-modules/transmissionrpc/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , six
diff --git a/pkgs/development/python-modules/treq/default.nix b/pkgs/development/python-modules/treq/default.nix
index 477223e9618..447e2a5b986 100644
--- a/pkgs/development/python-modules/treq/default.nix
+++ b/pkgs/development/python-modules/treq/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage, service-identity, requests, six
+{ lib, fetchPypi, buildPythonPackage, service-identity, requests, six
 , mock, twisted, incremental, pep8, httpbin
 }:
 
diff --git a/pkgs/development/python-modules/trezor_agent/default.nix b/pkgs/development/python-modules/trezor_agent/default.nix
index 537b4db7995..cef74c8636b 100644
--- a/pkgs/development/python-modules/trezor_agent/default.nix
+++ b/pkgs/development/python-modules/trezor_agent/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , trezor
diff --git a/pkgs/development/python-modules/trueskill/default.nix b/pkgs/development/python-modules/trueskill/default.nix
index 0c3efa404ec..db16ed7fafb 100644
--- a/pkgs/development/python-modules/trueskill/default.nix
+++ b/pkgs/development/python-modules/trueskill/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , six }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/ttystatus/default.nix b/pkgs/development/python-modules/ttystatus/default.nix
index 24eb1063707..f32045ce9cd 100644
--- a/pkgs/development/python-modules/ttystatus/default.nix
+++ b/pkgs/development/python-modules/ttystatus/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchurl
 , sphinx
diff --git a/pkgs/development/python-modules/tvdb_api/default.nix b/pkgs/development/python-modules/tvdb_api/default.nix
index f2cdbe8dc63..845aff673b7 100644
--- a/pkgs/development/python-modules/tvdb_api/default.nix
+++ b/pkgs/development/python-modules/tvdb_api/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , requests-cache
diff --git a/pkgs/development/python-modules/tvnamer/default.nix b/pkgs/development/python-modules/tvnamer/default.nix
index fa155b86f40..6a720421c72 100644
--- a/pkgs/development/python-modules/tvnamer/default.nix
+++ b/pkgs/development/python-modules/tvnamer/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pytest
diff --git a/pkgs/development/python-modules/twiggy/default.nix b/pkgs/development/python-modules/twiggy/default.nix
index 9647dc8ae67..45e59860227 100644
--- a/pkgs/development/python-modules/twiggy/default.nix
+++ b/pkgs/development/python-modules/twiggy/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , six
diff --git a/pkgs/development/python-modules/twilio/default.nix b/pkgs/development/python-modules/twilio/default.nix
index 7931a4ad0ec..ff4bb845c89 100644
--- a/pkgs/development/python-modules/twilio/default.nix
+++ b/pkgs/development/python-modules/twilio/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub
+{ lib, buildPythonPackage, fetchFromGitHub
 , pyjwt, pysocks, pytz, requests, six, nose, mock }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/twitter-common-collections/default.nix b/pkgs/development/python-modules/twitter-common-collections/default.nix
index 72f30514dc6..644a97d2b2e 100644
--- a/pkgs/development/python-modules/twitter-common-collections/default.nix
+++ b/pkgs/development/python-modules/twitter-common-collections/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , twitter-common-lang
diff --git a/pkgs/development/python-modules/twitter-common-confluence/default.nix b/pkgs/development/python-modules/twitter-common-confluence/default.nix
index ee5bf9bdbe1..d718a18822b 100644
--- a/pkgs/development/python-modules/twitter-common-confluence/default.nix
+++ b/pkgs/development/python-modules/twitter-common-confluence/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , twitter-common-log
diff --git a/pkgs/development/python-modules/twitter-common-dirutil/default.nix b/pkgs/development/python-modules/twitter-common-dirutil/default.nix
index 14b0bcd0673..bf9ec099ddb 100644
--- a/pkgs/development/python-modules/twitter-common-dirutil/default.nix
+++ b/pkgs/development/python-modules/twitter-common-dirutil/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , twitter-common-lang
diff --git a/pkgs/development/python-modules/twitter-common-lang/default.nix b/pkgs/development/python-modules/twitter-common-lang/default.nix
index 4b4a5c0fc2e..93178f46792 100644
--- a/pkgs/development/python-modules/twitter-common-lang/default.nix
+++ b/pkgs/development/python-modules/twitter-common-lang/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/twitter-common-log/default.nix b/pkgs/development/python-modules/twitter-common-log/default.nix
index 8cf99c39dc2..61f5d99a8f1 100644
--- a/pkgs/development/python-modules/twitter-common-log/default.nix
+++ b/pkgs/development/python-modules/twitter-common-log/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , twitter-common-options
diff --git a/pkgs/development/python-modules/twitter-common-options/default.nix b/pkgs/development/python-modules/twitter-common-options/default.nix
index a5505330bc0..b3ae7f7f5d9 100644
--- a/pkgs/development/python-modules/twitter-common-options/default.nix
+++ b/pkgs/development/python-modules/twitter-common-options/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/twitter/default.nix b/pkgs/development/python-modules/twitter/default.nix
index 23d647d9315..7114dc661f4 100644
--- a/pkgs/development/python-modules/twitter/default.nix
+++ b/pkgs/development/python-modules/twitter/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/txaio/default.nix b/pkgs/development/python-modules/txaio/default.nix
index 4d756fa89f3..814b6234ee3 100644
--- a/pkgs/development/python-modules/txaio/default.nix
+++ b/pkgs/development/python-modules/txaio/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, pytest, mock, six, twisted, isPy37, isPy27 }:
+{ lib, buildPythonPackage, fetchPypi, pytest, mock, six, twisted, isPy37, isPy27 }:
 
 buildPythonPackage rec {
   pname = "txaio";
diff --git a/pkgs/development/python-modules/txamqp/default.nix b/pkgs/development/python-modules/txamqp/default.nix
index f0e3904a881..cc66e041ae3 100644
--- a/pkgs/development/python-modules/txamqp/default.nix
+++ b/pkgs/development/python-modules/txamqp/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , twisted
diff --git a/pkgs/development/python-modules/txdbus/default.nix b/pkgs/development/python-modules/txdbus/default.nix
index 461ddeee34b..31afbd4fdf9 100644
--- a/pkgs/development/python-modules/txdbus/default.nix
+++ b/pkgs/development/python-modules/txdbus/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, six, twisted }:
+{ lib, buildPythonPackage, fetchPypi, six, twisted }:
 
 buildPythonPackage rec {
   pname = "txdbus";
diff --git a/pkgs/development/python-modules/txgithub/default.nix b/pkgs/development/python-modules/txgithub/default.nix
index 402e5011ede..09af476e94d 100644
--- a/pkgs/development/python-modules/txgithub/default.nix
+++ b/pkgs/development/python-modules/txgithub/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pyopenssl
diff --git a/pkgs/development/python-modules/txrequests/default.nix b/pkgs/development/python-modules/txrequests/default.nix
index 06979e2b9b3..be32dc4a738 100644
--- a/pkgs/development/python-modules/txrequests/default.nix
+++ b/pkgs/development/python-modules/txrequests/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , twisted
diff --git a/pkgs/development/python-modules/typeguard/default.nix b/pkgs/development/python-modules/typeguard/default.nix
index 448e52af7af..7aced09b33d 100644
--- a/pkgs/development/python-modules/typeguard/default.nix
+++ b/pkgs/development/python-modules/typeguard/default.nix
@@ -1,7 +1,7 @@
 { buildPythonPackage
 , fetchPypi
 , pythonOlder
-, lib, stdenv
+, lib
 , setuptools_scm
 , pytest
 , typing-extensions
diff --git a/pkgs/development/python-modules/typogrify/default.nix b/pkgs/development/python-modules/typogrify/default.nix
index faa1c8641c0..25445d8a7d2 100644
--- a/pkgs/development/python-modules/typogrify/default.nix
+++ b/pkgs/development/python-modules/typogrify/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPyPy
diff --git a/pkgs/development/python-modules/tzlocal/default.nix b/pkgs/development/python-modules/tzlocal/default.nix
index df0923833fd..a7cd91d6845 100644
--- a/pkgs/development/python-modules/tzlocal/default.nix
+++ b/pkgs/development/python-modules/tzlocal/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , pytz }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/ua-parser/default.nix b/pkgs/development/python-modules/ua-parser/default.nix
index 370ed527d19..36d725d14f4 100644
--- a/pkgs/development/python-modules/ua-parser/default.nix
+++ b/pkgs/development/python-modules/ua-parser/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, pyyaml }:
+{ lib, buildPythonPackage, fetchPypi, pyyaml }:
 
 buildPythonPackage rec {
   pname = "ua-parser";
diff --git a/pkgs/development/python-modules/ujson/2.nix b/pkgs/development/python-modules/ujson/2.nix
index f31b26a1960..36aa5a020c3 100644
--- a/pkgs/development/python-modules/ujson/2.nix
+++ b/pkgs/development/python-modules/ujson/2.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , setuptools_scm
diff --git a/pkgs/development/python-modules/ujson/default.nix b/pkgs/development/python-modules/ujson/default.nix
index 1c12a092a2f..9c759bd41b3 100644
--- a/pkgs/development/python-modules/ujson/default.nix
+++ b/pkgs/development/python-modules/ujson/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy3k
diff --git a/pkgs/development/python-modules/umalqurra/default.nix b/pkgs/development/python-modules/umalqurra/default.nix
index 4411dbac11b..0e1b4c681e5 100644
--- a/pkgs/development/python-modules/umalqurra/default.nix
+++ b/pkgs/development/python-modules/umalqurra/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/umemcache/default.nix b/pkgs/development/python-modules/umemcache/default.nix
index f852483cda6..26f8ba02756 100644
--- a/pkgs/development/python-modules/umemcache/default.nix
+++ b/pkgs/development/python-modules/umemcache/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, isPy3k, fetchurl }:
+{ lib, buildPythonPackage, isPy3k, fetchurl }:
 
 buildPythonPackage rec {
   pname = "umemcache";
diff --git a/pkgs/development/python-modules/uncertainties/default.nix b/pkgs/development/python-modules/uncertainties/default.nix
index 117188198ca..b43927c063e 100644
--- a/pkgs/development/python-modules/uncertainties/default.nix
+++ b/pkgs/development/python-modules/uncertainties/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage
+{ lib, fetchPypi, buildPythonPackage
 , nose, numpy, future
 }:
 
diff --git a/pkgs/development/python-modules/uncompyle6/default.nix b/pkgs/development/python-modules/uncompyle6/default.nix
index 4f8d461c87e..31095fcd50e 100644
--- a/pkgs/development/python-modules/uncompyle6/default.nix
+++ b/pkgs/development/python-modules/uncompyle6/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pythonAtLeast
diff --git a/pkgs/development/python-modules/unicode-slugify/default.nix b/pkgs/development/python-modules/unicode-slugify/default.nix
index 80ac5151b53..a0574f948f0 100644
--- a/pkgs/development/python-modules/unicode-slugify/default.nix
+++ b/pkgs/development/python-modules/unicode-slugify/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , nose
diff --git a/pkgs/development/python-modules/unicodecsv/default.nix b/pkgs/development/python-modules/unicodecsv/default.nix
index 9393ff58bc2..ede2b0d3f09 100644
--- a/pkgs/development/python-modules/unicodecsv/default.nix
+++ b/pkgs/development/python-modules/unicodecsv/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/unidecode/default.nix b/pkgs/development/python-modules/unidecode/default.nix
index 34de3d71386..70724bb71b5 100644
--- a/pkgs/development/python-modules/unidecode/default.nix
+++ b/pkgs/development/python-modules/unidecode/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, glibcLocales }:
+{ lib, buildPythonPackage, fetchPypi, glibcLocales }:
 
 buildPythonPackage rec {
   pname = "Unidecode";
diff --git a/pkgs/development/python-modules/unifi/default.nix b/pkgs/development/python-modules/unifi/default.nix
index 66ab9ba3972..fc98695dd6f 100644
--- a/pkgs/development/python-modules/unifi/default.nix
+++ b/pkgs/development/python-modules/unifi/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage
+{ lib, buildPythonPackage
 , fetchPypi, urllib3 }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/unittest2/default.nix b/pkgs/development/python-modules/unittest2/default.nix
index a7c1252f4b4..ae8cab53b0c 100644
--- a/pkgs/development/python-modules/unittest2/default.nix
+++ b/pkgs/development/python-modules/unittest2/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , six
diff --git a/pkgs/development/python-modules/unpaddedbase64/default.nix b/pkgs/development/python-modules/unpaddedbase64/default.nix
index 52d2a42b4ba..96b27127cc6 100644
--- a/pkgs/development/python-modules/unpaddedbase64/default.nix
+++ b/pkgs/development/python-modules/unpaddedbase64/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 }:
diff --git a/pkgs/development/python-modules/upass/default.nix b/pkgs/development/python-modules/upass/default.nix
index 442876d7a97..61197c7219d 100644
--- a/pkgs/development/python-modules/upass/default.nix
+++ b/pkgs/development/python-modules/upass/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchurl
 , pyperclip
diff --git a/pkgs/development/python-modules/update_checker/default.nix b/pkgs/development/python-modules/update_checker/default.nix
index f9171e8cbc9..432232c60f9 100644
--- a/pkgs/development/python-modules/update_checker/default.nix
+++ b/pkgs/development/python-modules/update_checker/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, requests, isPy27
+{ lib, buildPythonPackage, fetchPypi, requests, isPy27
 }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/uproot3-methods/default.nix b/pkgs/development/python-modules/uproot3-methods/default.nix
index 5164bf854ad..21fe31630de 100644
--- a/pkgs/development/python-modules/uproot3-methods/default.nix
+++ b/pkgs/development/python-modules/uproot3-methods/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , numpy
diff --git a/pkgs/development/python-modules/uptime/default.nix b/pkgs/development/python-modules/uptime/default.nix
index 8f8c067d36a..640d2a6ed57 100644
--- a/pkgs/development/python-modules/uptime/default.nix
+++ b/pkgs/development/python-modules/uptime/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/uranium/default.nix b/pkgs/development/python-modules/uranium/default.nix
index f5bca2ed0fe..ff262d6b0a3 100644
--- a/pkgs/development/python-modules/uranium/default.nix
+++ b/pkgs/development/python-modules/uranium/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub, python, cmake
+{ lib, buildPythonPackage, fetchFromGitHub, python, cmake
 , pyqt5, numpy, scipy, shapely, libarcus, doxygen, gettext, pythonOlder }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/uritools/default.nix b/pkgs/development/python-modules/uritools/default.nix
index b06da7c6acc..2f4710eea46 100644
--- a/pkgs/development/python-modules/uritools/default.nix
+++ b/pkgs/development/python-modules/uritools/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, isPy27 }:
+{ lib, buildPythonPackage, fetchPypi, isPy27 }:
 
 buildPythonPackage rec {
   pname = "uritools";
diff --git a/pkgs/development/python-modules/urlgrabber/default.nix b/pkgs/development/python-modules/urlgrabber/default.nix
index 3a7158be73c..e78dc9b904d 100644
--- a/pkgs/development/python-modules/urlgrabber/default.nix
+++ b/pkgs/development/python-modules/urlgrabber/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, pycurl, six }:
+{ lib, buildPythonPackage, fetchPypi, pycurl, six }:
 
 buildPythonPackage rec {
   pname = "urlgrabber";
diff --git a/pkgs/development/python-modules/urwid/default.nix b/pkgs/development/python-modules/urwid/default.nix
index e3c5311136c..ceb57e86afb 100644
--- a/pkgs/development/python-modules/urwid/default.nix
+++ b/pkgs/development/python-modules/urwid/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, isPy3k, isPy27, glibcLocales }:
+{ lib, buildPythonPackage, fetchPypi, isPy3k, isPy27, glibcLocales }:
 
 buildPythonPackage rec {
   pname = "urwid";
diff --git a/pkgs/development/python-modules/urwidtrees/default.nix b/pkgs/development/python-modules/urwidtrees/default.nix
index 4c3a3e896f8..863989156c3 100644
--- a/pkgs/development/python-modules/urwidtrees/default.nix
+++ b/pkgs/development/python-modules/urwidtrees/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 , glibcLocales
diff --git a/pkgs/development/python-modules/usbtmc/default.nix b/pkgs/development/python-modules/usbtmc/default.nix
index b1f5b301dee..6dbb6ce184f 100644
--- a/pkgs/development/python-modules/usbtmc/default.nix
+++ b/pkgs/development/python-modules/usbtmc/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, buildPythonPackage, pyusb }:
+{ lib, fetchurl, buildPythonPackage, pyusb }:
 
 buildPythonPackage rec {
   pname = "usbtmc";
diff --git a/pkgs/development/python-modules/user-agents/default.nix b/pkgs/development/python-modules/user-agents/default.nix
index 7f8470cfbdc..d01c601c82a 100644
--- a/pkgs/development/python-modules/user-agents/default.nix
+++ b/pkgs/development/python-modules/user-agents/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub, ua-parser }:
+{ lib, buildPythonPackage, fetchFromGitHub, ua-parser }:
 
 buildPythonPackage rec {
   pname = "user-agents";
diff --git a/pkgs/development/python-modules/validate-email/default.nix b/pkgs/development/python-modules/validate-email/default.nix
index 327cfcf3f0d..2b1fdb4963d 100644
--- a/pkgs/development/python-modules/validate-email/default.nix
+++ b/pkgs/development/python-modules/validate-email/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "validate-email";
diff --git a/pkgs/development/python-modules/validictory/default.nix b/pkgs/development/python-modules/validictory/default.nix
index e89b3d7bcd2..29ffb76591e 100644
--- a/pkgs/development/python-modules/validictory/default.nix
+++ b/pkgs/development/python-modules/validictory/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/vcversioner/default.nix b/pkgs/development/python-modules/vcversioner/default.nix
index 7d73a6e812d..236bb8d149b 100644
--- a/pkgs/development/python-modules/vcversioner/default.nix
+++ b/pkgs/development/python-modules/vcversioner/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "vcversioner";
diff --git a/pkgs/development/python-modules/vdf/default.nix b/pkgs/development/python-modules/vdf/default.nix
index 9e4e92d21ae..846aa7a13df 100644
--- a/pkgs/development/python-modules/vdf/default.nix
+++ b/pkgs/development/python-modules/vdf/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub
+{ lib, buildPythonPackage, fetchFromGitHub
 , pytest, pytestcov, mock }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/vdirsyncer/default.nix b/pkgs/development/python-modules/vdirsyncer/default.nix
index bda65ab4907..1f7642bfe34 100644
--- a/pkgs/development/python-modules/vdirsyncer/default.nix
+++ b/pkgs/development/python-modules/vdirsyncer/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy27
diff --git a/pkgs/development/python-modules/vega/default.nix b/pkgs/development/python-modules/vega/default.nix
index 3a36d5de606..083aa630209 100644
--- a/pkgs/development/python-modules/vega/default.nix
+++ b/pkgs/development/python-modules/vega/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage , fetchPypi, pythonOlder
+{ lib, buildPythonPackage , fetchPypi, pythonOlder
 , pytest, jupyter_core, pandas, ipywidgets, jupyter, altair }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/venusian/default.nix b/pkgs/development/python-modules/venusian/default.nix
index 68d974aabec..82e291ae462 100644
--- a/pkgs/development/python-modules/venusian/default.nix
+++ b/pkgs/development/python-modules/venusian/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy27
diff --git a/pkgs/development/python-modules/versioneer/default.nix b/pkgs/development/python-modules/versioneer/default.nix
index fa3329503a3..3685e78d4b4 100644
--- a/pkgs/development/python-modules/versioneer/default.nix
+++ b/pkgs/development/python-modules/versioneer/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, isPy27 }:
+{ lib, buildPythonPackage, fetchPypi, isPy27 }:
 
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/versiontools/default.nix b/pkgs/development/python-modules/versiontools/default.nix
index 45b34d95301..f74c8610b4c 100644
--- a/pkgs/development/python-modules/versiontools/default.nix
+++ b/pkgs/development/python-modules/versiontools/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy3k
diff --git a/pkgs/development/python-modules/veryprettytable/default.nix b/pkgs/development/python-modules/veryprettytable/default.nix
index f2c8cee451d..003fd6db621 100644
--- a/pkgs/development/python-modules/veryprettytable/default.nix
+++ b/pkgs/development/python-modules/veryprettytable/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , termcolor
diff --git a/pkgs/development/python-modules/vidstab/default.nix b/pkgs/development/python-modules/vidstab/default.nix
index 548105a0177..4119b26259d 100644
--- a/pkgs/development/python-modules/vidstab/default.nix
+++ b/pkgs/development/python-modules/vidstab/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , numpy
diff --git a/pkgs/development/python-modules/vine/default.nix b/pkgs/development/python-modules/vine/default.nix
index 048fa435e0b..8fc895cfa44 100644
--- a/pkgs/development/python-modules/vine/default.nix
+++ b/pkgs/development/python-modules/vine/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , case, pytest, pythonOlder }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/virtualenv-clone/default.nix b/pkgs/development/python-modules/virtualenv-clone/default.nix
index 9b225021cf2..4dfebc13075 100644
--- a/pkgs/development/python-modules/virtualenv-clone/default.nix
+++ b/pkgs/development/python-modules/virtualenv-clone/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pytest
diff --git a/pkgs/development/python-modules/virtualenvwrapper/default.nix b/pkgs/development/python-modules/virtualenvwrapper/default.nix
index 658f41126fc..087a1a2ca51 100644
--- a/pkgs/development/python-modules/virtualenvwrapper/default.nix
+++ b/pkgs/development/python-modules/virtualenvwrapper/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pbr
diff --git a/pkgs/development/python-modules/vmprof/default.nix b/pkgs/development/python-modules/vmprof/default.nix
index f8be722ef90..3962a1e02c3 100644
--- a/pkgs/development/python-modules/vmprof/default.nix
+++ b/pkgs/development/python-modules/vmprof/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , colorama
diff --git a/pkgs/development/python-modules/vncdo/default.nix b/pkgs/development/python-modules/vncdo/default.nix
index cb1b1677e1b..ef33a46cc34 100644
--- a/pkgs/development/python-modules/vncdo/default.nix
+++ b/pkgs/development/python-modules/vncdo/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub
+{ lib, fetchFromGitHub
 , buildPythonPackage, isPy27
 , pillow
 , twisted
diff --git a/pkgs/development/python-modules/voluptuous/default.nix b/pkgs/development/python-modules/voluptuous/default.nix
index 63be8cd4bd0..9882724fbb6 100644
--- a/pkgs/development/python-modules/voluptuous/default.nix
+++ b/pkgs/development/python-modules/voluptuous/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, nose }:
+{ lib, buildPythonPackage, fetchPypi, nose }:
 
 buildPythonPackage rec {
   pname = "voluptuous";
diff --git a/pkgs/development/python-modules/vultr/default.nix b/pkgs/development/python-modules/vultr/default.nix
index d4349d310be..975e4098112 100644
--- a/pkgs/development/python-modules/vultr/default.nix
+++ b/pkgs/development/python-modules/vultr/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 , requests
diff --git a/pkgs/development/python-modules/vxi11/default.nix b/pkgs/development/python-modules/vxi11/default.nix
index 5d9531aa904..242fe47b33d 100644
--- a/pkgs/development/python-modules/vxi11/default.nix
+++ b/pkgs/development/python-modules/vxi11/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub, nose }:
+{ lib, buildPythonPackage, fetchFromGitHub, nose }:
 
 buildPythonPackage rec {
   pname = "python-vxi11";
diff --git a/pkgs/development/python-modules/w3lib/default.nix b/pkgs/development/python-modules/w3lib/default.nix
index ae404e01cfb..0c80423e36a 100644
--- a/pkgs/development/python-modules/w3lib/default.nix
+++ b/pkgs/development/python-modules/w3lib/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , six
diff --git a/pkgs/development/python-modules/waitress/default.nix b/pkgs/development/python-modules/waitress/default.nix
index 09f4f66e0b5..4edd4c6ccff 100644
--- a/pkgs/development/python-modules/waitress/default.nix
+++ b/pkgs/development/python-modules/waitress/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/wakeonlan/default.nix b/pkgs/development/python-modules/wakeonlan/default.nix
index 29c30e7ba6a..86d405a33ef 100644
--- a/pkgs/development/python-modules/wakeonlan/default.nix
+++ b/pkgs/development/python-modules/wakeonlan/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage, setuptools_scm, pytest, mock }:
+{ lib, fetchPypi, buildPythonPackage, setuptools_scm, pytest, mock }:
 
 buildPythonPackage rec {
   pname = "wakeonlan";
diff --git a/pkgs/development/python-modules/warlock/default.nix b/pkgs/development/python-modules/warlock/default.nix
index 80dcabdcb20..1b62c918f33 100644
--- a/pkgs/development/python-modules/warlock/default.nix
+++ b/pkgs/development/python-modules/warlock/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , six
diff --git a/pkgs/development/python-modules/wasabi/default.nix b/pkgs/development/python-modules/wasabi/default.nix
index 5a0c2ecaa5f..f9bc1916ad6 100644
--- a/pkgs/development/python-modules/wasabi/default.nix
+++ b/pkgs/development/python-modules/wasabi/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pytestCheckHook
diff --git a/pkgs/development/python-modules/web/default.nix b/pkgs/development/python-modules/web/default.nix
index 84b4cc8dcfb..1b40519d592 100644
--- a/pkgs/development/python-modules/web/default.nix
+++ b/pkgs/development/python-modules/web/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, pytestCheckHook
+{ lib, buildPythonPackage, fetchPypi, pytestCheckHook
 , cheroot
 , dbutils, mysqlclient, pymysql, mysql-connector, psycopg2
 }:
diff --git a/pkgs/development/python-modules/webapp2/default.nix b/pkgs/development/python-modules/webapp2/default.nix
index 048c5d91b1d..841fb5bd74b 100644
--- a/pkgs/development/python-modules/webapp2/default.nix
+++ b/pkgs/development/python-modules/webapp2/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , webob
diff --git a/pkgs/development/python-modules/webhelpers/default.nix b/pkgs/development/python-modules/webhelpers/default.nix
index 040341ed376..dcb2bd3817d 100644
--- a/pkgs/development/python-modules/webhelpers/default.nix
+++ b/pkgs/development/python-modules/webhelpers/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , routes
diff --git a/pkgs/development/python-modules/webob/default.nix b/pkgs/development/python-modules/webob/default.nix
index 78ca8f918a3..124b45a2eb3 100644
--- a/pkgs/development/python-modules/webob/default.nix
+++ b/pkgs/development/python-modules/webob/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , nose
diff --git a/pkgs/development/python-modules/websockify/default.nix b/pkgs/development/python-modules/websockify/default.nix
index 021344b2207..d3072e75041 100644
--- a/pkgs/development/python-modules/websockify/default.nix
+++ b/pkgs/development/python-modules/websockify/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , numpy
diff --git a/pkgs/development/python-modules/webtest/default.nix b/pkgs/development/python-modules/webtest/default.nix
index 98ee58d3f6c..d56e5415b91 100644
--- a/pkgs/development/python-modules/webtest/default.nix
+++ b/pkgs/development/python-modules/webtest/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy27
diff --git a/pkgs/development/python-modules/whisper/default.nix b/pkgs/development/python-modules/whisper/default.nix
index ad25df4868a..7b084c16267 100644
--- a/pkgs/development/python-modules/whisper/default.nix
+++ b/pkgs/development/python-modules/whisper/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, mock, six }:
+{ lib, buildPythonPackage, fetchPypi, mock, six }:
 
 buildPythonPackage rec {
   pname = "whisper";
diff --git a/pkgs/development/python-modules/whitenoise/default.nix b/pkgs/development/python-modules/whitenoise/default.nix
index 2399c6ed73f..3c63c727c0d 100644
--- a/pkgs/development/python-modules/whitenoise/default.nix
+++ b/pkgs/development/python-modules/whitenoise/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage, isPy27 }:
+{ lib, fetchPypi, buildPythonPackage, isPy27 }:
 
 buildPythonPackage rec {
   pname = "whitenoise";
diff --git a/pkgs/development/python-modules/whoosh/default.nix b/pkgs/development/python-modules/whoosh/default.nix
index f5bbccec2a5..d3ff703f694 100644
--- a/pkgs/development/python-modules/whoosh/default.nix
+++ b/pkgs/development/python-modules/whoosh/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, pytest }:
+{ lib, buildPythonPackage, fetchPypi, pytest }:
 
 buildPythonPackage rec {
   pname = "Whoosh";
diff --git a/pkgs/development/python-modules/willow/default.nix b/pkgs/development/python-modules/willow/default.nix
index fbf4965117b..3dafd4df44b 100644
--- a/pkgs/development/python-modules/willow/default.nix
+++ b/pkgs/development/python-modules/willow/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pythonOlder
diff --git a/pkgs/development/python-modules/word2vec/default.nix b/pkgs/development/python-modules/word2vec/default.nix
index 647914bfbe5..259566c8fc2 100644
--- a/pkgs/development/python-modules/word2vec/default.nix
+++ b/pkgs/development/python-modules/word2vec/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , fetchzip
diff --git a/pkgs/development/python-modules/wordcloud/default.nix b/pkgs/development/python-modules/wordcloud/default.nix
index b4dd108ae73..80f22efbda8 100644
--- a/pkgs/development/python-modules/wordcloud/default.nix
+++ b/pkgs/development/python-modules/wordcloud/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub
+{ lib, buildPythonPackage, fetchFromGitHub
 , matplotlib
 , mock
 , numpy
diff --git a/pkgs/development/python-modules/worldengine/default.nix b/pkgs/development/python-modules/worldengine/default.nix
index 51c0de77917..13ce4bc873d 100644
--- a/pkgs/development/python-modules/worldengine/default.nix
+++ b/pkgs/development/python-modules/worldengine/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , pythonOlder
 , isPy27
diff --git a/pkgs/development/python-modules/wrapio/default.nix b/pkgs/development/python-modules/wrapio/default.nix
index 757585bd145..bbbc1917f54 100644
--- a/pkgs/development/python-modules/wrapio/default.nix
+++ b/pkgs/development/python-modules/wrapio/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/ws4py/default.nix b/pkgs/development/python-modules/ws4py/default.nix
index 2b7a66df285..8abf78520dc 100644
--- a/pkgs/development/python-modules/ws4py/default.nix
+++ b/pkgs/development/python-modules/ws4py/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, pytest, mock, git
+{ lib, buildPythonPackage, fetchPypi, pytest, mock, git
 , cherrypy, gevent, tornado }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/wsgiproxy/default.nix b/pkgs/development/python-modules/wsgiproxy/default.nix
index 12aa3c88d96..e2cc26ff143 100644
--- a/pkgs/development/python-modules/wsgiproxy/default.nix
+++ b/pkgs/development/python-modules/wsgiproxy/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , paste
diff --git a/pkgs/development/python-modules/wsgiproxy2/default.nix b/pkgs/development/python-modules/wsgiproxy2/default.nix
index 81a2f98b86f..2a9856cdd08 100644
--- a/pkgs/development/python-modules/wsgiproxy2/default.nix
+++ b/pkgs/development/python-modules/wsgiproxy2/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , six
diff --git a/pkgs/development/python-modules/wtforms/default.nix b/pkgs/development/python-modules/wtforms/default.nix
index 45c465ddcba..96440c438bc 100644
--- a/pkgs/development/python-modules/wtforms/default.nix
+++ b/pkgs/development/python-modules/wtforms/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , markupsafe
diff --git a/pkgs/development/python-modules/x11_hash/default.nix b/pkgs/development/python-modules/x11_hash/default.nix
index 21bb787402c..e9cfe317432 100644
--- a/pkgs/development/python-modules/x11_hash/default.nix
+++ b/pkgs/development/python-modules/x11_hash/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/x256/default.nix b/pkgs/development/python-modules/x256/default.nix
index 4ceb2dcae79..4430fa2e4b8 100644
--- a/pkgs/development/python-modules/x256/default.nix
+++ b/pkgs/development/python-modules/x256/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/xapp/default.nix b/pkgs/development/python-modules/xapp/default.nix
index 28901017b2b..44435dd6bd8 100644
--- a/pkgs/development/python-modules/xapp/default.nix
+++ b/pkgs/development/python-modules/xapp/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , fetchFromGitHub
 , buildPythonPackage
 , psutil
diff --git a/pkgs/development/python-modules/xattr/default.nix b/pkgs/development/python-modules/xattr/default.nix
index 3583358a560..a39c3532f4b 100644
--- a/pkgs/development/python-modules/xattr/default.nix
+++ b/pkgs/development/python-modules/xattr/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , python
diff --git a/pkgs/development/python-modules/xcaplib/default.nix b/pkgs/development/python-modules/xcaplib/default.nix
index f6bb5712c2e..086eaf1e348 100644
--- a/pkgs/development/python-modules/xcaplib/default.nix
+++ b/pkgs/development/python-modules/xcaplib/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchdarcs
 , isPy3k
diff --git a/pkgs/development/python-modules/xdot/default.nix b/pkgs/development/python-modules/xdot/default.nix
index 21b45b9c322..7dbbd89e781 100644
--- a/pkgs/development/python-modules/xdot/default.nix
+++ b/pkgs/development/python-modules/xdot/default.nix
@@ -1,4 +1,4 @@
-{ lib, buildPythonPackage, fetchPypi, isPy3k, python3, xvfb_run, stdenv
+{ lib, buildPythonPackage, fetchPypi, isPy3k, python3, xvfb_run
 , wrapGAppsHook, gobject-introspection, pygobject3, graphviz, gtk3, numpy }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/xhtml2pdf/default.nix b/pkgs/development/python-modules/xhtml2pdf/default.nix
index e3328c7e453..efdb40cd6f8 100644
--- a/pkgs/development/python-modules/xhtml2pdf/default.nix
+++ b/pkgs/development/python-modules/xhtml2pdf/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pillow
diff --git a/pkgs/development/python-modules/xkcdpass/default.nix b/pkgs/development/python-modules/xkcdpass/default.nix
index 88f7b9b94a1..280ce5a790a 100644
--- a/pkgs/development/python-modules/xkcdpass/default.nix
+++ b/pkgs/development/python-modules/xkcdpass/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/xlrd/default.nix b/pkgs/development/python-modules/xlrd/default.nix
index 031ac047936..d880fd83396 100644
--- a/pkgs/development/python-modules/xlrd/default.nix
+++ b/pkgs/development/python-modules/xlrd/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pytest
diff --git a/pkgs/development/python-modules/xlsx2csv/default.nix b/pkgs/development/python-modules/xlsx2csv/default.nix
index a5b67632d83..6f7726da68d 100644
--- a/pkgs/development/python-modules/xlsx2csv/default.nix
+++ b/pkgs/development/python-modules/xlsx2csv/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/xml2rfc/default.nix b/pkgs/development/python-modules/xml2rfc/default.nix
index e06daf3c5b8..fdf042c2ac2 100644
--- a/pkgs/development/python-modules/xml2rfc/default.nix
+++ b/pkgs/development/python-modules/xml2rfc/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage, pythonAtLeast, intervaltree, pyflakes, requests, lxml, google-i18n-address
+{ lib, fetchPypi, buildPythonPackage, pythonAtLeast, intervaltree, pyflakes, requests, lxml, google-i18n-address
 , pycountry, html5lib, six, kitchen, pypdf2, dict2xml, weasyprint, pyyaml, jinja2, ConfigArgParse, appdirs
 }:
 
diff --git a/pkgs/development/python-modules/xmodem/default.nix b/pkgs/development/python-modules/xmodem/default.nix
index 9023c4cc79e..a53567f7fa8 100644
--- a/pkgs/development/python-modules/xmodem/default.nix
+++ b/pkgs/development/python-modules/xmodem/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub, pytest, which, lrzsz }:
+{ lib, buildPythonPackage, fetchFromGitHub, pytest, which, lrzsz }:
 
 buildPythonPackage rec {
   pname = "xmodem";
diff --git a/pkgs/development/python-modules/xmpppy/default.nix b/pkgs/development/python-modules/xmpppy/default.nix
index fd046adadd9..65e2b3711fa 100644
--- a/pkgs/development/python-modules/xmpppy/default.nix
+++ b/pkgs/development/python-modules/xmpppy/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchurl, isPy3k }:
+{ lib, buildPythonPackage, fetchurl, isPy3k }:
 buildPythonPackage rec {
   pname = "xmpp.py";
   version = "0.5.0rc1";
diff --git a/pkgs/development/python-modules/xvfbwrapper/default.nix b/pkgs/development/python-modules/xvfbwrapper/default.nix
index 0852fd2e15c..f037cb40338 100644
--- a/pkgs/development/python-modules/xvfbwrapper/default.nix
+++ b/pkgs/development/python-modules/xvfbwrapper/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , xorgserver
diff --git a/pkgs/development/python-modules/xxhash/default.nix b/pkgs/development/python-modules/xxhash/default.nix
index d2f6ae54a4c..08bcfcdacde 100644
--- a/pkgs/development/python-modules/xxhash/default.nix
+++ b/pkgs/development/python-modules/xxhash/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/yamllint/default.nix b/pkgs/development/python-modules/yamllint/default.nix
index 7145c504cd9..13545c0430d 100644
--- a/pkgs/development/python-modules/yamllint/default.nix
+++ b/pkgs/development/python-modules/yamllint/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , nose, pyyaml, pathspec }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/yanc/default.nix b/pkgs/development/python-modules/yanc/default.nix
index 6d4a3b41fbc..925276c0ad6 100644
--- a/pkgs/development/python-modules/yanc/default.nix
+++ b/pkgs/development/python-modules/yanc/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, pythonOlder, fetchPypi, nose }:
+{ lib, buildPythonPackage, pythonOlder, fetchPypi, nose }:
 
 buildPythonPackage rec {
   pname = "yanc";
diff --git a/pkgs/development/python-modules/yapf/default.nix b/pkgs/development/python-modules/yapf/default.nix
index 36409ae4019..9c0e9d35399 100644
--- a/pkgs/development/python-modules/yapf/default.nix
+++ b/pkgs/development/python-modules/yapf/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "yapf";
diff --git a/pkgs/development/python-modules/yapsy/default.nix b/pkgs/development/python-modules/yapsy/default.nix
index 359a855a3e5..e60b0a11473 100644
--- a/pkgs/development/python-modules/yapsy/default.nix
+++ b/pkgs/development/python-modules/yapsy/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/yarl/default.nix b/pkgs/development/python-modules/yarl/default.nix
index 7a88b695f63..0aeb85e6ca2 100644
--- a/pkgs/development/python-modules/yarl/default.nix
+++ b/pkgs/development/python-modules/yarl/default.nix
@@ -1,5 +1,4 @@
-{ stdenv
-, lib
+{ lib
 , fetchPypi
 , buildPythonPackage
 , pythonOlder
diff --git a/pkgs/development/python-modules/ydiff/default.nix b/pkgs/development/python-modules/ydiff/default.nix
index be935b1995c..e7452b89a53 100644
--- a/pkgs/development/python-modules/ydiff/default.nix
+++ b/pkgs/development/python-modules/ydiff/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, buildPythonPackage, fetchPypi, docutils, pygments
+{ lib, buildPythonPackage, fetchPypi, docutils, pygments
 , gitMinimal, mercurial, subversion, patchutils, less
 }:
 
diff --git a/pkgs/development/python-modules/yowsup/default.nix b/pkgs/development/python-modules/yowsup/default.nix
index 48c21434194..0ff3212f48c 100644
--- a/pkgs/development/python-modules/yowsup/default.nix
+++ b/pkgs/development/python-modules/yowsup/default.nix
@@ -1,4 +1,4 @@
-{ buildPythonPackage, lib, stdenv, fetchFromGitHub, six, python-axolotl, pytest
+{ buildPythonPackage, lib, fetchFromGitHub, six, python-axolotl, pytest
 , isPy3k, consonance, appdirs
 }:
 
diff --git a/pkgs/development/python-modules/z3c-checkversions/default.nix b/pkgs/development/python-modules/z3c-checkversions/default.nix
index f1af120d56e..8610306ea6f 100644
--- a/pkgs/development/python-modules/z3c-checkversions/default.nix
+++ b/pkgs/development/python-modules/z3c-checkversions/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , python
diff --git a/pkgs/development/python-modules/zake/default.nix b/pkgs/development/python-modules/zake/default.nix
index 1d1d21a462e..89635a88f35 100644
--- a/pkgs/development/python-modules/zake/default.nix
+++ b/pkgs/development/python-modules/zake/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , kazoo
diff --git a/pkgs/development/python-modules/zbaemon/default.nix b/pkgs/development/python-modules/zbaemon/default.nix
index 4e126074b18..23eae31057f 100644
--- a/pkgs/development/python-modules/zbaemon/default.nix
+++ b/pkgs/development/python-modules/zbaemon/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , zconfig
diff --git a/pkgs/development/python-modules/zbase32/default.nix b/pkgs/development/python-modules/zbase32/default.nix
index a4e7a476bec..715da719bbb 100644
--- a/pkgs/development/python-modules/zbase32/default.nix
+++ b/pkgs/development/python-modules/zbase32/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , setuptoolsDarcs
diff --git a/pkgs/development/python-modules/zc_lockfile/default.nix b/pkgs/development/python-modules/zc_lockfile/default.nix
index 3b75de3a24b..97289ec3630 100644
--- a/pkgs/development/python-modules/zc_lockfile/default.nix
+++ b/pkgs/development/python-modules/zc_lockfile/default.nix
@@ -2,7 +2,7 @@
 , fetchPypi
 , mock
 , zope_testing
-, lib, stdenv
+, lib
 }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/zdaemon/default.nix b/pkgs/development/python-modules/zdaemon/default.nix
index 4e126074b18..23eae31057f 100644
--- a/pkgs/development/python-modules/zdaemon/default.nix
+++ b/pkgs/development/python-modules/zdaemon/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , zconfig
diff --git a/pkgs/development/python-modules/zerobin/default.nix b/pkgs/development/python-modules/zerobin/default.nix
index e1208875668..19d02a70496 100644
--- a/pkgs/development/python-modules/zerobin/default.nix
+++ b/pkgs/development/python-modules/zerobin/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 , cherrypy
diff --git a/pkgs/development/python-modules/zeroc-ice/default.nix b/pkgs/development/python-modules/zeroc-ice/default.nix
index f85674d6867..6dccf51100e 100644
--- a/pkgs/development/python-modules/zeroc-ice/default.nix
+++ b/pkgs/development/python-modules/zeroc-ice/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, openssl, bzip2 }:
+{ lib, buildPythonPackage, fetchPypi, openssl, bzip2 }:
 
 buildPythonPackage rec {
   pname = "zeroc-ice";
diff --git a/pkgs/development/python-modules/zfec/default.nix b/pkgs/development/python-modules/zfec/default.nix
index 8a5aaf46b0e..bcec7a09251 100644
--- a/pkgs/development/python-modules/zfec/default.nix
+++ b/pkgs/development/python-modules/zfec/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , setuptoolsDarcs
diff --git a/pkgs/development/python-modules/zict/default.nix b/pkgs/development/python-modules/zict/default.nix
index da36c1cba89..611660fc3eb 100644
--- a/pkgs/development/python-modules/zict/default.nix
+++ b/pkgs/development/python-modules/zict/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , pytest, heapdict, pythonOlder }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/zigpy-znp/default.nix b/pkgs/development/python-modules/zigpy-znp/default.nix
index 4de49cbc46b..1a1c639a473 100644
--- a/pkgs/development/python-modules/zigpy-znp/default.nix
+++ b/pkgs/development/python-modules/zigpy-znp/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , async-timeout
 , asynctest
 , buildPythonPackage
diff --git a/pkgs/development/python-modules/zodb/default.nix b/pkgs/development/python-modules/zodb/default.nix
index d48b9c4b950..aa7cc6c97eb 100644
--- a/pkgs/development/python-modules/zodb/default.nix
+++ b/pkgs/development/python-modules/zodb/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , fetchPypi
 , buildPythonPackage
 , python
diff --git a/pkgs/development/python-modules/zope_broken/default.nix b/pkgs/development/python-modules/zope_broken/default.nix
index 899d7f3344b..a3583654e66 100644
--- a/pkgs/development/python-modules/zope_broken/default.nix
+++ b/pkgs/development/python-modules/zope_broken/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , zope_interface
diff --git a/pkgs/development/python-modules/zope_component/default.nix b/pkgs/development/python-modules/zope_component/default.nix
index 6ea86b9b984..65556c9dc41 100644
--- a/pkgs/development/python-modules/zope_component/default.nix
+++ b/pkgs/development/python-modules/zope_component/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , zope-deferredimport
diff --git a/pkgs/development/python-modules/zope_configuration/default.nix b/pkgs/development/python-modules/zope_configuration/default.nix
index e8d05b7767b..e3ede9f94af 100644
--- a/pkgs/development/python-modules/zope_configuration/default.nix
+++ b/pkgs/development/python-modules/zope_configuration/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , zope_i18nmessageid
diff --git a/pkgs/development/python-modules/zope_contenttype/default.nix b/pkgs/development/python-modules/zope_contenttype/default.nix
index 6b66cca18aa..15010d80a14 100644
--- a/pkgs/development/python-modules/zope_contenttype/default.nix
+++ b/pkgs/development/python-modules/zope_contenttype/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , zope_testrunner
diff --git a/pkgs/development/python-modules/zope_deprecation/default.nix b/pkgs/development/python-modules/zope_deprecation/default.nix
index cda7af8e7a0..7eb66f7a9c5 100644
--- a/pkgs/development/python-modules/zope_deprecation/default.nix
+++ b/pkgs/development/python-modules/zope_deprecation/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , zope_testing
diff --git a/pkgs/development/python-modules/zope_dottedname/default.nix b/pkgs/development/python-modules/zope_dottedname/default.nix
index 0e8f3543136..cbd5cd6d653 100644
--- a/pkgs/development/python-modules/zope_dottedname/default.nix
+++ b/pkgs/development/python-modules/zope_dottedname/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/zope_event/default.nix b/pkgs/development/python-modules/zope_event/default.nix
index cc82da7ea9a..2ebf6e017b5 100644
--- a/pkgs/development/python-modules/zope_event/default.nix
+++ b/pkgs/development/python-modules/zope_event/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/zope_exceptions/default.nix b/pkgs/development/python-modules/zope_exceptions/default.nix
index 09f08c7bba4..0586227c61c 100644
--- a/pkgs/development/python-modules/zope_exceptions/default.nix
+++ b/pkgs/development/python-modules/zope_exceptions/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , zope_interface
diff --git a/pkgs/development/python-modules/zope_filerepresentation/default.nix b/pkgs/development/python-modules/zope_filerepresentation/default.nix
index 7aae2a24d62..4792a09e26b 100644
--- a/pkgs/development/python-modules/zope_filerepresentation/default.nix
+++ b/pkgs/development/python-modules/zope_filerepresentation/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , zope_schema
diff --git a/pkgs/development/python-modules/zope_i18nmessageid/default.nix b/pkgs/development/python-modules/zope_i18nmessageid/default.nix
index 49270488ecd..1155adc83e9 100644
--- a/pkgs/development/python-modules/zope_i18nmessageid/default.nix
+++ b/pkgs/development/python-modules/zope_i18nmessageid/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , six
diff --git a/pkgs/development/python-modules/zope_interface/default.nix b/pkgs/development/python-modules/zope_interface/default.nix
index 7a32045fc3e..7b5d7abf682 100644
--- a/pkgs/development/python-modules/zope_interface/default.nix
+++ b/pkgs/development/python-modules/zope_interface/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , zope_event
diff --git a/pkgs/development/python-modules/zope_lifecycleevent/default.nix b/pkgs/development/python-modules/zope_lifecycleevent/default.nix
index 390624b50de..809d8252cb2 100644
--- a/pkgs/development/python-modules/zope_lifecycleevent/default.nix
+++ b/pkgs/development/python-modules/zope_lifecycleevent/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy3k
diff --git a/pkgs/development/python-modules/zope_location/default.nix b/pkgs/development/python-modules/zope_location/default.nix
index 62b2cef9ea7..69fee2e338f 100644
--- a/pkgs/development/python-modules/zope_location/default.nix
+++ b/pkgs/development/python-modules/zope_location/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , zope_proxy
diff --git a/pkgs/development/python-modules/zope_proxy/default.nix b/pkgs/development/python-modules/zope_proxy/default.nix
index af108c058c7..67e8a191d97 100644
--- a/pkgs/development/python-modules/zope_proxy/default.nix
+++ b/pkgs/development/python-modules/zope_proxy/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , zope_interface
diff --git a/pkgs/development/python-modules/zope_schema/default.nix b/pkgs/development/python-modules/zope_schema/default.nix
index c7e228c4e05..75683cb2eb8 100644
--- a/pkgs/development/python-modules/zope_schema/default.nix
+++ b/pkgs/development/python-modules/zope_schema/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , zope_location
diff --git a/pkgs/development/python-modules/zope_size/default.nix b/pkgs/development/python-modules/zope_size/default.nix
index 79eadc880a2..6945dddceaa 100644
--- a/pkgs/development/python-modules/zope_size/default.nix
+++ b/pkgs/development/python-modules/zope_size/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , zope_i18nmessageid
diff --git a/pkgs/development/python-modules/zope_testing/default.nix b/pkgs/development/python-modules/zope_testing/default.nix
index 3d7cbf90c25..2f37f15453d 100644
--- a/pkgs/development/python-modules/zope_testing/default.nix
+++ b/pkgs/development/python-modules/zope_testing/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPyPy
diff --git a/pkgs/development/python-modules/zope_testrunner/default.nix b/pkgs/development/python-modules/zope_testrunner/default.nix
index c516106e48b..5ee42c84275 100644
--- a/pkgs/development/python-modules/zope_testrunner/default.nix
+++ b/pkgs/development/python-modules/zope_testrunner/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , zope_interface
diff --git a/pkgs/development/python-modules/zstd/default.nix b/pkgs/development/python-modules/zstd/default.nix
index af7bb7692f6..1d8fa8d93e9 100644
--- a/pkgs/development/python-modules/zstd/default.nix
+++ b/pkgs/development/python-modules/zstd/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, pkg-config, fetchPypi, buildPythonPackage
+{ lib, pkg-config, fetchPypi, buildPythonPackage
 , buildPackages
 , zstd, pytest }:
 
diff --git a/pkgs/development/ruby-modules/bundler-app/default.nix b/pkgs/development/ruby-modules/bundler-app/default.nix
index 0859f08c2f7..03bf7275cc7 100644
--- a/pkgs/development/ruby-modules/bundler-app/default.nix
+++ b/pkgs/development/ruby-modules/bundler-app/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, callPackage, runCommand, makeWrapper, ruby }@defs:
+{ lib, callPackage, runCommand, makeWrapper, ruby }@defs:
 
 # Use for simple installation of Ruby tools shipped in a Gem.
 # Start with a Gemfile that includes `gem <toolgem>`
diff --git a/pkgs/development/ruby-modules/testing/driver.nix b/pkgs/development/ruby-modules/testing/driver.nix
index 65e7c8d4416..23a9a1cec54 100644
--- a/pkgs/development/ruby-modules/testing/driver.nix
+++ b/pkgs/development/ruby-modules/testing/driver.nix
@@ -5,7 +5,7 @@ nix-build -E 'with import <nixpkgs> { }; callPackage ./test.nix {}' --show-trace
 Confusingly, the ideal result ends with something like:
 error: build of ‘/nix/store/3245f3dcl2wxjs4rci7n069zjlz8qg85-test-results.tap.drv’ failed
 */
-{ writeText, lib, callPackage, testFiles, stdenv, ruby }@defs:
+{ writeText, lib, callPackage, testFiles, ruby }@defs:
 let
   testTools = rec {
     test = import ./testing.nix;
diff --git a/pkgs/development/tools/ameba/default.nix b/pkgs/development/tools/ameba/default.nix
index f8cb7441116..9bfaab51554 100644
--- a/pkgs/development/tools/ameba/default.nix
+++ b/pkgs/development/tools/ameba/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, fetchFromGitHub, crystal }:
+{ lib, fetchFromGitHub, crystal }:
 
 crystal.buildCrystalPackage rec {
   pname = "ameba";
diff --git a/pkgs/development/tools/analysis/autoflake/default.nix b/pkgs/development/tools/analysis/autoflake/default.nix
index 884b511b8af..03e01aadb71 100644
--- a/pkgs/development/tools/analysis/autoflake/default.nix
+++ b/pkgs/development/tools/analysis/autoflake/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python3Packages }:
+{ lib, python3Packages }:
 
 with python3Packages;
 buildPythonApplication rec {
diff --git a/pkgs/development/tools/analysis/bingrep/default.nix b/pkgs/development/tools/analysis/bingrep/default.nix
index ae54723dda3..338bc3e189c 100644
--- a/pkgs/development/tools/analysis/bingrep/default.nix
+++ b/pkgs/development/tools/analysis/bingrep/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, rustPlatform, fetchFromGitHub }:
+{ lib, rustPlatform, fetchFromGitHub }:
 
 rustPlatform.buildRustPackage rec {
   pname = "bingrep";
diff --git a/pkgs/development/tools/analysis/checkov/default.nix b/pkgs/development/tools/analysis/checkov/default.nix
index 6277b1d4239..06c366529df 100644
--- a/pkgs/development/tools/analysis/checkov/default.nix
+++ b/pkgs/development/tools/analysis/checkov/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, pkgs, lib, python3, fetchFromGitHub }:
+{ pkgs, lib, python3, fetchFromGitHub }:
 
 let
   pname = "checkov";
diff --git a/pkgs/development/tools/analysis/egypt/default.nix b/pkgs/development/tools/analysis/egypt/default.nix
index cfb974c86dd..02665022099 100644
--- a/pkgs/development/tools/analysis/egypt/default.nix
+++ b/pkgs/development/tools/analysis/egypt/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, perlPackages }:
+{ lib, fetchurl, perlPackages }:
 
 perlPackages.buildPerlPackage rec {
   pname = "egypt";
diff --git a/pkgs/development/tools/analysis/evmdis/default.nix b/pkgs/development/tools/analysis/evmdis/default.nix
index b8f3aa0ac1f..4061090b182 100644
--- a/pkgs/development/tools/analysis/evmdis/default.nix
+++ b/pkgs/development/tools/analysis/evmdis/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage {
   pname = "evmdis-unstable";
diff --git a/pkgs/development/tools/analysis/hotspot/default.nix b/pkgs/development/tools/analysis/hotspot/default.nix
index 6ea079e3ec1..94b440f58c8 100644
--- a/pkgs/development/tools/analysis/hotspot/default.nix
+++ b/pkgs/development/tools/analysis/hotspot/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv,
+{ lib,
   mkDerivation,
   cmake,
   elfutils,
diff --git a/pkgs/development/tools/analysis/panopticon/default.nix b/pkgs/development/tools/analysis/panopticon/default.nix
index ff5014bd46a..0ef33270e92 100644
--- a/pkgs/development/tools/analysis/panopticon/default.nix
+++ b/pkgs/development/tools/analysis/panopticon/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, rustPlatform, qt5, git, cmake
+{ lib, fetchFromGitHub, rustPlatform, qt5, git, cmake
 , pkg-config, makeWrapper }:
 
 rustPlatform.buildRustPackage rec {
diff --git a/pkgs/development/tools/analysis/snowman/default.nix b/pkgs/development/tools/analysis/snowman/default.nix
index 261645c062d..870f084580b 100644
--- a/pkgs/development/tools/analysis/snowman/default.nix
+++ b/pkgs/development/tools/analysis/snowman/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, mkDerivation, fetchFromGitHub, cmake, boost, qtbase }:
+{ lib, mkDerivation, fetchFromGitHub, cmake, boost, qtbase }:
 
 mkDerivation rec {
   pname = "snowman";
diff --git a/pkgs/development/tools/analysis/uefi-firmware-parser/default.nix b/pkgs/development/tools/analysis/uefi-firmware-parser/default.nix
index 17f39071462..b879a6ef237 100644
--- a/pkgs/development/tools/analysis/uefi-firmware-parser/default.nix
+++ b/pkgs/development/tools/analysis/uefi-firmware-parser/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python3, fetchFromGitHub }:
+{ lib, python3, fetchFromGitHub }:
 
 with python3.pkgs;
 
diff --git a/pkgs/development/tools/asn2quickder/default.nix b/pkgs/development/tools/asn2quickder/default.nix
index b2432f7fefc..9ffcbb172d4 100644
--- a/pkgs/development/tools/asn2quickder/default.nix
+++ b/pkgs/development/tools/asn2quickder/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonApplication, fetchFromGitHub, makeWrapper, cmake
+{ lib, buildPythonApplication, fetchFromGitHub, makeWrapper, cmake
 , pytestrunner, pytest, six, pyparsing, asn1ate }:
 
 buildPythonApplication rec {
diff --git a/pkgs/development/tools/async/default.nix b/pkgs/development/tools/async/default.nix
index 54e16cb6faa..a45e93ab151 100644
--- a/pkgs/development/tools/async/default.nix
+++ b/pkgs/development/tools/async/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, rustPlatform }:
+{ lib, fetchFromGitHub, rustPlatform }:
 
 rustPlatform.buildRustPackage rec {
   pname = "async";
diff --git a/pkgs/development/tools/azcopy/default.nix b/pkgs/development/tools/azcopy/default.nix
index 822480b1d3f..98a6bcd5bbc 100644
--- a/pkgs/development/tools/azcopy/default.nix
+++ b/pkgs/development/tools/azcopy/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, buildGoModule }:
+{ lib, fetchFromGitHub, buildGoModule }:
 
 buildGoModule rec {
   pname = "azure-storage-azcopy";
diff --git a/pkgs/development/tools/bazelisk/default.nix b/pkgs/development/tools/bazelisk/default.nix
index e4a6b3c2869..2cfde85f224 100644
--- a/pkgs/development/tools/bazelisk/default.nix
+++ b/pkgs/development/tools/bazelisk/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "bazelisk";
diff --git a/pkgs/development/tools/build-managers/bazel/bazel-remote/default.nix b/pkgs/development/tools/build-managers/bazel/bazel-remote/default.nix
index ac03288f148..80c949c1efb 100644
--- a/pkgs/development/tools/build-managers/bazel/bazel-remote/default.nix
+++ b/pkgs/development/tools/build-managers/bazel/bazel-remote/default.nix
@@ -3,7 +3,7 @@
 , fetchFromGitHub
 , git
 , go
-, lib, stdenv
+, lib
 }:
 
 buildBazelPackage rec {
diff --git a/pkgs/development/tools/build-managers/bazel/buildtools/default.nix b/pkgs/development/tools/build-managers/bazel/buildtools/default.nix
index 436b681e005..441254ce263 100644
--- a/pkgs/development/tools/build-managers/bazel/buildtools/default.nix
+++ b/pkgs/development/tools/build-managers/bazel/buildtools/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "bazel-buildtools";
diff --git a/pkgs/development/tools/build-managers/fac/default.nix b/pkgs/development/tools/build-managers/fac/default.nix
index 25450ceb6d9..601f7ea9fea 100644
--- a/pkgs/development/tools/build-managers/fac/default.nix
+++ b/pkgs/development/tools/build-managers/fac/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, git, fetchFromGitHub, rustPlatform }:
+{ lib, git, fetchFromGitHub, rustPlatform }:
 
 rustPlatform.buildRustPackage rec {
   pname = "fac-build";
diff --git a/pkgs/development/tools/build-managers/meson/default.nix b/pkgs/development/tools/build-managers/meson/default.nix
index 74d96d4af00..7009aa4898f 100644
--- a/pkgs/development/tools/build-managers/meson/default.nix
+++ b/pkgs/development/tools/build-managers/meson/default.nix
@@ -1,6 +1,6 @@
 { lib
 , python3
-, stdenv
+
 , writeTextDir
 , substituteAll
 , fetchpatch
diff --git a/pkgs/development/tools/build-managers/pants/default.nix b/pkgs/development/tools/build-managers/pants/default.nix
index 03eac2db5e3..53333c217ba 100644
--- a/pkgs/development/tools/build-managers/pants/default.nix
+++ b/pkgs/development/tools/build-managers/pants/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, pythonPackages }:
+{ lib, pythonPackages }:
 
 with lib;
 with pythonPackages;
diff --git a/pkgs/development/tools/build-managers/scons/common.nix b/pkgs/development/tools/build-managers/scons/common.nix
index 1de2ecbbc8b..63df4ccf7be 100644
--- a/pkgs/development/tools/build-managers/scons/common.nix
+++ b/pkgs/development/tools/build-managers/scons/common.nix
@@ -1,6 +1,6 @@
 { version, sha256 }:
 
-{ stdenv, fetchurl, python3Packages, lib }:
+{ fetchurl, python3Packages, lib }:
 
 python3Packages.buildPythonApplication rec {
   pname = "scons";
diff --git a/pkgs/development/tools/build-managers/shards/default.nix b/pkgs/development/tools/build-managers/shards/default.nix
index 868ea265f6f..8cab1667b21 100644
--- a/pkgs/development/tools/build-managers/shards/default.nix
+++ b/pkgs/development/tools/build-managers/shards/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , fetchFromGitHub
 , crystal_0_34
 , crystal_0_35
diff --git a/pkgs/development/tools/clog-cli/default.nix b/pkgs/development/tools/clog-cli/default.nix
index 182a7f98c4c..c3b477e3ea3 100644
--- a/pkgs/development/tools/clog-cli/default.nix
+++ b/pkgs/development/tools/clog-cli/default.nix
@@ -1,4 +1,4 @@
-{ fetchFromGitHub, rustPlatform, lib, stdenv }:
+{ fetchFromGitHub, rustPlatform, lib }:
 
 with rustPlatform;
 
diff --git a/pkgs/development/tools/compile-daemon/default.nix b/pkgs/development/tools/compile-daemon/default.nix
index ef08b2d5813..a12fb4424e8 100644
--- a/pkgs/development/tools/compile-daemon/default.nix
+++ b/pkgs/development/tools/compile-daemon/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "compile-daemon-unstable";
diff --git a/pkgs/development/tools/continuous-integration/buildkite-agent/default.nix b/pkgs/development/tools/continuous-integration/buildkite-agent/default.nix
index bd8608a9119..ed1171458b1 100644
--- a/pkgs/development/tools/continuous-integration/buildkite-agent/default.nix
+++ b/pkgs/development/tools/continuous-integration/buildkite-agent/default.nix
@@ -1,4 +1,4 @@
-{ fetchFromGitHub, lib, stdenv, buildGoModule,
+{ fetchFromGitHub, lib, buildGoModule,
   makeWrapper, coreutils, git, openssh, bash, gnused, gnugrep }:
 buildGoModule rec {
   name = "buildkite-agent-${version}";
diff --git a/pkgs/development/tools/continuous-integration/buildkite-agent/generic.nix b/pkgs/development/tools/continuous-integration/buildkite-agent/generic.nix
index 232efe32a1a..64ca730d7dc 100644
--- a/pkgs/development/tools/continuous-integration/buildkite-agent/generic.nix
+++ b/pkgs/development/tools/continuous-integration/buildkite-agent/generic.nix
@@ -1,4 +1,4 @@
-{ stdenv, buildGoPackage, makeWrapper, coreutils, git, openssh, bash, gnused, gnugrep
+{ buildGoPackage, makeWrapper, coreutils, git, openssh, bash, gnused, gnugrep
 , src, version, hasBootstrapScript, postPatch ? ""
 , ... }:
 let
diff --git a/pkgs/development/tools/continuous-integration/drone-cli/default.nix b/pkgs/development/tools/continuous-integration/drone-cli/default.nix
index b1ee5349a5c..6c9cffe41b2 100644
--- a/pkgs/development/tools/continuous-integration/drone-cli/default.nix
+++ b/pkgs/development/tools/continuous-integration/drone-cli/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, buildGoModule }:
+{ lib, fetchFromGitHub, buildGoModule }:
 
 let version = "1.2.4";
 in buildGoModule rec {
diff --git a/pkgs/development/tools/continuous-integration/drone/default.nix b/pkgs/development/tools/continuous-integration/drone/default.nix
index ffdf588895a..c6d609e38cf 100644
--- a/pkgs/development/tools/continuous-integration/drone/default.nix
+++ b/pkgs/development/tools/continuous-integration/drone/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, buildGoModule }:
+{ lib, fetchFromGitHub, buildGoModule }:
 
 buildGoModule rec {
   name = "drone.io-${version}";
diff --git a/pkgs/development/tools/corgi/default.nix b/pkgs/development/tools/corgi/default.nix
index a7698ef4fb8..e39e42c40af 100644
--- a/pkgs/development/tools/corgi/default.nix
+++ b/pkgs/development/tools/corgi/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   name = "corgi-${rev}";
diff --git a/pkgs/development/tools/cppclean/default.nix b/pkgs/development/tools/cppclean/default.nix
index 4e00eb903eb..460d7cddb83 100644
--- a/pkgs/development/tools/cppclean/default.nix
+++ b/pkgs/development/tools/cppclean/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, python3Packages }:
+{ lib, fetchFromGitHub, python3Packages }:
 
 with python3Packages;
 
diff --git a/pkgs/development/tools/cue/default.nix b/pkgs/development/tools/cue/default.nix
index 243be958b07..28660732ea4 100644
--- a/pkgs/development/tools/cue/default.nix
+++ b/pkgs/development/tools/cue/default.nix
@@ -1,4 +1,4 @@
-{ buildGoModule, fetchgit, lib, stdenv }:
+{ buildGoModule, fetchgit, lib }:
 
 buildGoModule rec {
   pname = "cue";
diff --git a/pkgs/development/tools/dapr/cli/default.nix b/pkgs/development/tools/dapr/cli/default.nix
index 7a8243ece25..57fd984dc17 100644
--- a/pkgs/development/tools/dapr/cli/default.nix
+++ b/pkgs/development/tools/dapr/cli/default.nix
@@ -1,4 +1,4 @@
-{ buildGoModule, fetchFromGitHub, lib, stdenv }:
+{ buildGoModule, fetchFromGitHub, lib }:
 
 let
   pname = "dapr";
diff --git a/pkgs/development/tools/database/dbmate/default.nix b/pkgs/development/tools/database/dbmate/default.nix
index 9c01c1e9d2d..6634c2b6384 100644
--- a/pkgs/development/tools/database/dbmate/default.nix
+++ b/pkgs/development/tools/database/dbmate/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "dbmate";
diff --git a/pkgs/development/tools/database/pyrseas/default.nix b/pkgs/development/tools/database/pyrseas/default.nix
index 119aa2eb8f8..075cd5053be 100644
--- a/pkgs/development/tools/database/pyrseas/default.nix
+++ b/pkgs/development/tools/database/pyrseas/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, pythonPackages, fetchFromGitHub }:
+{ lib, pythonPackages, fetchFromGitHub }:
 
 let
   pgdbconn = pythonPackages.buildPythonPackage {
diff --git a/pkgs/development/tools/database/timescaledb-parallel-copy/default.nix b/pkgs/development/tools/database/timescaledb-parallel-copy/default.nix
index 2b8a6f7cca0..42c2a55fd3e 100644
--- a/pkgs/development/tools/database/timescaledb-parallel-copy/default.nix
+++ b/pkgs/development/tools/database/timescaledb-parallel-copy/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "timescaledb-parallel-copy";
diff --git a/pkgs/development/tools/database/timescaledb-tune/default.nix b/pkgs/development/tools/database/timescaledb-tune/default.nix
index cec374ccb3a..34d5d12607f 100644
--- a/pkgs/development/tools/database/timescaledb-tune/default.nix
+++ b/pkgs/development/tools/database/timescaledb-tune/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "timescaledb-tune";
diff --git a/pkgs/development/tools/deis/default.nix b/pkgs/development/tools/deis/default.nix
index c8e20d42063..8286435d9a3 100644
--- a/pkgs/development/tools/deis/default.nix
+++ b/pkgs/development/tools/deis/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "deis";
diff --git a/pkgs/development/tools/deisctl/default.nix b/pkgs/development/tools/deisctl/default.nix
index 0f5df40d92c..67245a5ebbe 100644
--- a/pkgs/development/tools/deisctl/default.nix
+++ b/pkgs/development/tools/deisctl/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "deis";
diff --git a/pkgs/development/tools/delve/default.nix b/pkgs/development/tools/delve/default.nix
index 62fb32c8516..bd8f2484b33 100644
--- a/pkgs/development/tools/delve/default.nix
+++ b/pkgs/development/tools/delve/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "delve";
diff --git a/pkgs/development/tools/dep/default.nix b/pkgs/development/tools/dep/default.nix
index ff7f370b0d4..ff7bad87afd 100644
--- a/pkgs/development/tools/dep/default.nix
+++ b/pkgs/development/tools/dep/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "dep";
diff --git a/pkgs/development/tools/dep2nix/default.nix b/pkgs/development/tools/dep2nix/default.nix
index daa68b1b931..5d98ecd5729 100644
--- a/pkgs/development/tools/dep2nix/default.nix
+++ b/pkgs/development/tools/dep2nix/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, buildGoPackage
+{ lib, fetchFromGitHub, buildGoPackage
 , makeWrapper, nix-prefetch-scripts }:
 
 buildGoPackage rec {
diff --git a/pkgs/development/tools/devd/default.nix b/pkgs/development/tools/devd/default.nix
index 32f29f7e128..0789850a494 100644
--- a/pkgs/development/tools/devd/default.nix
+++ b/pkgs/development/tools/devd/default.nix
@@ -1,4 +1,4 @@
-{ buildGoPackage, fetchFromGitHub, lib, stdenv }:
+{ buildGoPackage, fetchFromGitHub, lib }:
 
 buildGoPackage rec {
   pname = "devd";
diff --git a/pkgs/development/tools/devpi-client/default.nix b/pkgs/development/tools/devpi-client/default.nix
index 766f3f2b729..5905e05d071 100644
--- a/pkgs/development/tools/devpi-client/default.nix
+++ b/pkgs/development/tools/devpi-client/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonApplication
 , fetchPypi
 # buildInputs
diff --git a/pkgs/development/tools/devpi-server/default.nix b/pkgs/development/tools/devpi-server/default.nix
index 3d8cb16bb47..8a484a23349 100644
--- a/pkgs/development/tools/devpi-server/default.nix
+++ b/pkgs/development/tools/devpi-server/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, python3Packages, nginx }:
+{ lib, fetchFromGitHub, python3Packages, nginx }:
 
 python3Packages.buildPythonApplication rec {
   pname = "devpi-server";
diff --git a/pkgs/development/tools/documentation/antora/default.nix b/pkgs/development/tools/documentation/antora/default.nix
index d553df59446..ea8aeb83c8c 100644
--- a/pkgs/development/tools/documentation/antora/default.nix
+++ b/pkgs/development/tools/documentation/antora/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, nodePackages }:
+{ lib, nodePackages }:
 
 let
   linkNodeDeps = ({ pkg, deps, name ? "" }:
diff --git a/pkgs/development/tools/documentation/gnome-doc-utils/default.nix b/pkgs/development/tools/documentation/gnome-doc-utils/default.nix
index 2e04d3dd365..d031145a997 100644
--- a/pkgs/development/tools/documentation/gnome-doc-utils/default.nix
+++ b/pkgs/development/tools/documentation/gnome-doc-utils/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, pkg-config, libxml2Python, libxslt, intltool, gnome3
+{ lib, fetchurl, pkg-config, libxml2Python, libxslt, intltool, gnome3
 , python2Packages }:
 
 python2Packages.buildPythonApplication rec {
diff --git a/pkgs/development/tools/documentation/gtk-doc/default.nix b/pkgs/development/tools/documentation/gtk-doc/default.nix
index b1ea6a0634b..d82c288e5aa 100644
--- a/pkgs/development/tools/documentation/gtk-doc/default.nix
+++ b/pkgs/development/tools/documentation/gtk-doc/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , fetchFromGitLab
 , meson
 , ninja
diff --git a/pkgs/development/tools/documentation/mdsh/default.nix b/pkgs/development/tools/documentation/mdsh/default.nix
index d2e555a4550..c8e6cafa27a 100644
--- a/pkgs/development/tools/documentation/mdsh/default.nix
+++ b/pkgs/development/tools/documentation/mdsh/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, rustPlatform }:
+{ lib, fetchFromGitHub, rustPlatform }:
 
 rustPlatform.buildRustPackage rec {
   pname = "mdsh";
diff --git a/pkgs/development/tools/documentation/mkdocs/default.nix b/pkgs/development/tools/documentation/mkdocs/default.nix
index bee22856eb1..64d834f1bb2 100644
--- a/pkgs/development/tools/documentation/mkdocs/default.nix
+++ b/pkgs/development/tools/documentation/mkdocs/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, python3, fetchFromGitHub }:
+{ lib, python3, fetchFromGitHub }:
 
 with python3.pkgs;
 
diff --git a/pkgs/development/tools/easyjson/default.nix b/pkgs/development/tools/easyjson/default.nix
index a458f0dbfce..75bfc1d4c14 100644
--- a/pkgs/development/tools/easyjson/default.nix
+++ b/pkgs/development/tools/easyjson/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage {
   pname = "easyjson";
diff --git a/pkgs/development/tools/eliot-tree/default.nix b/pkgs/development/tools/eliot-tree/default.nix
index e60642c5fe6..adcedfe643c 100644
--- a/pkgs/development/tools/eliot-tree/default.nix
+++ b/pkgs/development/tools/eliot-tree/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python3Packages }:
+{ lib, python3Packages }:
 
 python3Packages.buildPythonApplication rec {
   pname = "eliot-tree";
diff --git a/pkgs/development/tools/fac/default.nix b/pkgs/development/tools/fac/default.nix
index ef3298c5478..c50fd834e03 100644
--- a/pkgs/development/tools/fac/default.nix
+++ b/pkgs/development/tools/fac/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub, makeWrapper, git }:
+{ lib, buildGoPackage, fetchFromGitHub, makeWrapper, git }:
 
 buildGoPackage rec {
   pname = "fac";
diff --git a/pkgs/development/tools/fedpkg/default.nix b/pkgs/development/tools/fedpkg/default.nix
index 285e71707fd..d9633e88f34 100644
--- a/pkgs/development/tools/fedpkg/default.nix
+++ b/pkgs/development/tools/fedpkg/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonApplication, buildPythonPackage, isPy3k, fetchurl, rpkg, offtrac, urlgrabber, pyopenssl, python_fedora }:
+{ lib, buildPythonApplication, buildPythonPackage, isPy3k, fetchurl, rpkg, offtrac, urlgrabber, pyopenssl, python_fedora }:
 
 let
   fedora_cert = buildPythonPackage rec {
diff --git a/pkgs/development/tools/flootty/default.nix b/pkgs/development/tools/flootty/default.nix
index 4867b9c2cb9..e4f76ca9f6a 100644
--- a/pkgs/development/tools/flootty/default.nix
+++ b/pkgs/development/tools/flootty/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python3Packages }:
+{ lib, python3Packages }:
 
 python3Packages.buildPythonApplication rec {
   pname = "Flootty";
diff --git a/pkgs/development/tools/gauge/default.nix b/pkgs/development/tools/gauge/default.nix
index a0eb7370bee..168910da06f 100644
--- a/pkgs/development/tools/gauge/default.nix
+++ b/pkgs/development/tools/gauge/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "gauge";
diff --git a/pkgs/development/tools/gdm/default.nix b/pkgs/development/tools/gdm/default.nix
index 7c7f73af1e0..7ecb7895d2f 100644
--- a/pkgs/development/tools/gdm/default.nix
+++ b/pkgs/development/tools/gdm/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "gdm";
diff --git a/pkgs/development/tools/ginkgo/default.nix b/pkgs/development/tools/ginkgo/default.nix
index b65e7c6a5ee..05db94c7f1e 100644
--- a/pkgs/development/tools/ginkgo/default.nix
+++ b/pkgs/development/tools/ginkgo/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "ginkgo";
diff --git a/pkgs/development/tools/gir/default.nix b/pkgs/development/tools/gir/default.nix
index 8f38b41f7ae..c88ffef4df1 100644
--- a/pkgs/development/tools/gir/default.nix
+++ b/pkgs/development/tools/gir/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, rustPlatform }:
+{ lib, fetchFromGitHub, rustPlatform }:
 
 rustPlatform.buildRustPackage rec {
   pname = "gir";
diff --git a/pkgs/development/tools/git-series/default.nix b/pkgs/development/tools/git-series/default.nix
index 4f13c3de40b..0f7677c7aa2 100644
--- a/pkgs/development/tools/git-series/default.nix
+++ b/pkgs/development/tools/git-series/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, fetchpatch, rustPlatform
+{ lib, fetchFromGitHub, fetchpatch, rustPlatform
 , openssl, cmake, perl, pkg-config, zlib, curl, libgit2, libssh2
 }:
 
diff --git a/pkgs/development/tools/github/cligh/default.nix b/pkgs/development/tools/github/cligh/default.nix
index dfe66c789ca..ce340239ac4 100644
--- a/pkgs/development/tools/github/cligh/default.nix
+++ b/pkgs/development/tools/github/cligh/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, buildPythonApplication, pyxdg, PyGithub }:
+{ lib, fetchFromGitHub, buildPythonApplication, pyxdg, PyGithub }:
 
 buildPythonApplication rec {
   pname = "cligh";
diff --git a/pkgs/development/tools/glide/default.nix b/pkgs/development/tools/glide/default.nix
index f8abde7e00a..05e4ae81061 100644
--- a/pkgs/development/tools/glide/default.nix
+++ b/pkgs/development/tools/glide/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "glide";
diff --git a/pkgs/development/tools/gllvm/default.nix b/pkgs/development/tools/gllvm/default.nix
index f2c552252fb..78038440a96 100644
--- a/pkgs/development/tools/gllvm/default.nix
+++ b/pkgs/development/tools/gllvm/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "gllvm";
diff --git a/pkgs/development/tools/glock/default.nix b/pkgs/development/tools/glock/default.nix
index c00478c9fb6..b2d1e09e74f 100644
--- a/pkgs/development/tools/glock/default.nix
+++ b/pkgs/development/tools/glock/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "glock";
diff --git a/pkgs/development/tools/go-bindata-assetfs/default.nix b/pkgs/development/tools/go-bindata-assetfs/default.nix
index 57d0e93a9b0..5131436e024 100644
--- a/pkgs/development/tools/go-bindata-assetfs/default.nix
+++ b/pkgs/development/tools/go-bindata-assetfs/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "go-bindata-assetfs";
diff --git a/pkgs/development/tools/go-bindata/default.nix b/pkgs/development/tools/go-bindata/default.nix
index 5d257bbf998..3b73c527315 100644
--- a/pkgs/development/tools/go-bindata/default.nix
+++ b/pkgs/development/tools/go-bindata/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage {
   pname = "go-bindata";
diff --git a/pkgs/development/tools/go-junit-report/default.nix b/pkgs/development/tools/go-junit-report/default.nix
index f1e822e3633..110cdbfabc9 100644
--- a/pkgs/development/tools/go-junit-report/default.nix
+++ b/pkgs/development/tools/go-junit-report/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "go-junit-report-unstable";
diff --git a/pkgs/development/tools/go-langserver/default.nix b/pkgs/development/tools/go-langserver/default.nix
index fdefd6b0178..ac6034dffa4 100644
--- a/pkgs/development/tools/go-langserver/default.nix
+++ b/pkgs/development/tools/go-langserver/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "go-langserver";
diff --git a/pkgs/development/tools/go-migrate/default.nix b/pkgs/development/tools/go-migrate/default.nix
index 1786bfe5f0f..d07e3cd80d3 100644
--- a/pkgs/development/tools/go-migrate/default.nix
+++ b/pkgs/development/tools/go-migrate/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "go-migrate";
diff --git a/pkgs/development/tools/go-outline/default.nix b/pkgs/development/tools/go-outline/default.nix
index d30d5c30f3a..fe4c2e8d4df 100644
--- a/pkgs/development/tools/go-outline/default.nix
+++ b/pkgs/development/tools/go-outline/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "go-outline";
diff --git a/pkgs/development/tools/go-protobuf/default.nix b/pkgs/development/tools/go-protobuf/default.nix
index 0187552d844..1fa027ae72b 100644
--- a/pkgs/development/tools/go-protobuf/default.nix
+++ b/pkgs/development/tools/go-protobuf/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "go-protobuf";
diff --git a/pkgs/development/tools/go-repo-root/default.nix b/pkgs/development/tools/go-repo-root/default.nix
index 25fc87f8985..b7653aa144e 100644
--- a/pkgs/development/tools/go-repo-root/default.nix
+++ b/pkgs/development/tools/go-repo-root/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchgit }:
+{ lib, buildGoPackage, fetchgit }:
 
 buildGoPackage rec {
   pname = "go-repo-root";
diff --git a/pkgs/development/tools/go-symbols/default.nix b/pkgs/development/tools/go-symbols/default.nix
index 3f41007716e..a259b768561 100644
--- a/pkgs/development/tools/go-symbols/default.nix
+++ b/pkgs/development/tools/go-symbols/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "go-symbols";
diff --git a/pkgs/development/tools/go2nix/default.nix b/pkgs/development/tools/go2nix/default.nix
index bcd1f56f525..b5a224cb5ae 100644
--- a/pkgs/development/tools/go2nix/default.nix
+++ b/pkgs/development/tools/go2nix/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, go-bindata, gotools, nix-prefetch-git, git, makeWrapper,
+{ lib, buildGoPackage, go-bindata, gotools, nix-prefetch-git, git, makeWrapper,
   fetchFromGitHub }:
 
 buildGoPackage rec {
diff --git a/pkgs/development/tools/goa/default.nix b/pkgs/development/tools/goa/default.nix
index 63322b6d363..56b47bd8c60 100644
--- a/pkgs/development/tools/goa/default.nix
+++ b/pkgs/development/tools/goa/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "goa";
diff --git a/pkgs/development/tools/gocode-gomod/default.nix b/pkgs/development/tools/gocode-gomod/default.nix
index 995bd3102cc..f610b19d79b 100644
--- a/pkgs/development/tools/gocode-gomod/default.nix
+++ b/pkgs/development/tools/gocode-gomod/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "gocode-gomod";
diff --git a/pkgs/development/tools/gocode/default.nix b/pkgs/development/tools/gocode/default.nix
index 9bed4073b2b..be9f70da934 100644
--- a/pkgs/development/tools/gocode/default.nix
+++ b/pkgs/development/tools/gocode/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "gocode-unstable";
diff --git a/pkgs/development/tools/goconvey/default.nix b/pkgs/development/tools/goconvey/default.nix
index dcec045e5eb..fb6ce653cc4 100644
--- a/pkgs/development/tools/goconvey/default.nix
+++ b/pkgs/development/tools/goconvey/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "goconvey";
diff --git a/pkgs/development/tools/godef/default.nix b/pkgs/development/tools/godef/default.nix
index 6d4f40ba6bc..99fe932013e 100644
--- a/pkgs/development/tools/godef/default.nix
+++ b/pkgs/development/tools/godef/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "godef";
diff --git a/pkgs/development/tools/godot/headless.nix b/pkgs/development/tools/godot/headless.nix
index 20d3b48f2fd..a8d640eba1a 100644
--- a/pkgs/development/tools/godot/headless.nix
+++ b/pkgs/development/tools/godot/headless.nix
@@ -1,4 +1,4 @@
-{ godot, lib, stdenv }:
+{ godot, lib }:
 godot.overrideAttrs (oldAttrs: rec {
   pname = "godot-headless";
   sconsFlags = "target=release_debug platform=server tools=yes";
diff --git a/pkgs/development/tools/godot/server.nix b/pkgs/development/tools/godot/server.nix
index 6ce347355e3..4254dc746b6 100644
--- a/pkgs/development/tools/godot/server.nix
+++ b/pkgs/development/tools/godot/server.nix
@@ -1,4 +1,4 @@
-{ godot, lib, stdenv }:
+{ godot, lib }:
 godot.overrideAttrs (oldAttrs: rec {
   pname = "godot-server";
   sconsFlags = "target=release platform=server tools=no";
diff --git a/pkgs/development/tools/gojsontoyaml/default.nix b/pkgs/development/tools/gojsontoyaml/default.nix
index 0f772134a0e..0fd45598a83 100644
--- a/pkgs/development/tools/gojsontoyaml/default.nix
+++ b/pkgs/development/tools/gojsontoyaml/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "gojsontoyaml";
diff --git a/pkgs/development/tools/golint/default.nix b/pkgs/development/tools/golint/default.nix
index 1f75384f338..89b9f146495 100644
--- a/pkgs/development/tools/golint/default.nix
+++ b/pkgs/development/tools/golint/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchgit }:
+{ lib, buildGoPackage, fetchgit }:
 
 buildGoPackage rec {
   pname = "lint";
diff --git a/pkgs/development/tools/gomodifytags/default.nix b/pkgs/development/tools/gomodifytags/default.nix
index 650f1b89f30..254113f2106 100644
--- a/pkgs/development/tools/gomodifytags/default.nix
+++ b/pkgs/development/tools/gomodifytags/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "gomodifytags";
diff --git a/pkgs/development/tools/gomplate/default.nix b/pkgs/development/tools/gomplate/default.nix
index f8d6553f74d..0f2c9558174 100644
--- a/pkgs/development/tools/gomplate/default.nix
+++ b/pkgs/development/tools/gomplate/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "gomplate";
diff --git a/pkgs/development/tools/gopkgs/default.nix b/pkgs/development/tools/gopkgs/default.nix
index e4a72cb27a1..a5413c6a9c0 100644
--- a/pkgs/development/tools/gopkgs/default.nix
+++ b/pkgs/development/tools/gopkgs/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "gopkgs";
diff --git a/pkgs/development/tools/gopls/default.nix b/pkgs/development/tools/gopls/default.nix
index 7a7c98e2894..1617900acee 100644
--- a/pkgs/development/tools/gopls/default.nix
+++ b/pkgs/development/tools/gopls/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchgit }:
+{ lib, buildGoModule, fetchgit }:
 
 buildGoModule rec {
   pname = "gopls";
diff --git a/pkgs/development/tools/gore/default.nix b/pkgs/development/tools/gore/default.nix
index 30d7cd1ef33..43bb2d2aad7 100644
--- a/pkgs/development/tools/gore/default.nix
+++ b/pkgs/development/tools/gore/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "gore";
diff --git a/pkgs/development/tools/gosec/default.nix b/pkgs/development/tools/gosec/default.nix
index 69d74496e61..1ebb6e71713 100644
--- a/pkgs/development/tools/gosec/default.nix
+++ b/pkgs/development/tools/gosec/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "gosec";
diff --git a/pkgs/development/tools/gotags/default.nix b/pkgs/development/tools/gotags/default.nix
index ea40bd0e6fe..274f7a476c2 100644
--- a/pkgs/development/tools/gotags/default.nix
+++ b/pkgs/development/tools/gotags/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchgit }:
+{ lib, buildGoPackage, fetchgit }:
 
 buildGoPackage rec {
   pname = "gotags";
diff --git a/pkgs/development/tools/gotests/default.nix b/pkgs/development/tools/gotests/default.nix
index 87a93abee8e..faa2e60aca4 100644
--- a/pkgs/development/tools/gotests/default.nix
+++ b/pkgs/development/tools/gotests/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "gotests";
diff --git a/pkgs/development/tools/gotestsum/default.nix b/pkgs/development/tools/gotestsum/default.nix
index ece194f0003..435edd61623 100644
--- a/pkgs/development/tools/gotestsum/default.nix
+++ b/pkgs/development/tools/gotestsum/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, buildGoModule }:
+{ lib, fetchFromGitHub, buildGoModule }:
 
 buildGoModule rec {
   pname = "gotestsum";
diff --git a/pkgs/development/tools/gotools/default.nix b/pkgs/development/tools/gotools/default.nix
index 7ca3486a503..285d546d742 100644
--- a/pkgs/development/tools/gotools/default.nix
+++ b/pkgs/development/tools/gotools/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchgit }:
+{ lib, buildGoModule, fetchgit }:
 
 buildGoModule rec {
   pname = "gotools-unstable";
diff --git a/pkgs/development/tools/govendor/default.nix b/pkgs/development/tools/govendor/default.nix
index edd9b577be4..b24afebb3aa 100644
--- a/pkgs/development/tools/govendor/default.nix
+++ b/pkgs/development/tools/govendor/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "govendor";
diff --git a/pkgs/development/tools/govers/default.nix b/pkgs/development/tools/govers/default.nix
index cac76daa6fc..5e2d89cfd5d 100644
--- a/pkgs/development/tools/govers/default.nix
+++ b/pkgs/development/tools/govers/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchgit }:
+{ lib, buildGoPackage, fetchgit }:
 
 buildGoPackage rec {
   pname = "govers";
diff --git a/pkgs/development/tools/gox/default.nix b/pkgs/development/tools/gox/default.nix
index 3deb73acb44..4aa7a314c87 100644
--- a/pkgs/development/tools/gox/default.nix
+++ b/pkgs/development/tools/gox/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "gox";
diff --git a/pkgs/development/tools/gron/default.nix b/pkgs/development/tools/gron/default.nix
index 6d182b0b5f5..f486bc95bc1 100644
--- a/pkgs/development/tools/gron/default.nix
+++ b/pkgs/development/tools/gron/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "gron";
diff --git a/pkgs/development/tools/haskell/dconf2nix/dconf2nix.nix b/pkgs/development/tools/haskell/dconf2nix/dconf2nix.nix
index 02c4c96bd8e..b857b910f0a 100644
--- a/pkgs/development/tools/haskell/dconf2nix/dconf2nix.nix
+++ b/pkgs/development/tools/haskell/dconf2nix/dconf2nix.nix
@@ -1,5 +1,5 @@
 { mkDerivation, base, containers, fetchgit, hedgehog
-, optparse-applicative, parsec, lib, stdenv, template-haskell, text
+, optparse-applicative, parsec, lib, template-haskell, text
 }:
 mkDerivation {
   pname = "dconf2nix";
diff --git a/pkgs/development/tools/haskell/haskell-language-server/default.nix b/pkgs/development/tools/haskell/haskell-language-server/default.nix
index 512aec84eea..71b6355db58 100644
--- a/pkgs/development/tools/haskell/haskell-language-server/default.nix
+++ b/pkgs/development/tools/haskell/haskell-language-server/default.nix
@@ -7,7 +7,7 @@
 , hls-tactics-plugin, hslogger, hspec, hspec-core
 , hspec-expectations, lens, lsp-test, mtl, optparse-applicative
 , optparse-simple, ormolu, process, regex-tdfa, safe-exceptions
-, shake, lib, stdenv, stm, stylish-haskell, tasty, tasty-ant-xml
+, shake, lib, stm, stylish-haskell, tasty, tasty-ant-xml
 , tasty-expected-failure, tasty-golden, tasty-hunit, tasty-rerun
 , temporary, text, transformers, unordered-containers, with-utf8
 , yaml
diff --git a/pkgs/development/tools/haskell/haskell-language-server/hls-class-plugin.nix b/pkgs/development/tools/haskell/haskell-language-server/hls-class-plugin.nix
index c5168934390..b757dc8c9e8 100644
--- a/pkgs/development/tools/haskell/haskell-language-server/hls-class-plugin.nix
+++ b/pkgs/development/tools/haskell/haskell-language-server/hls-class-plugin.nix
@@ -1,6 +1,6 @@
 { mkDerivation, aeson, base, containers, fetchgit, ghc
 , ghc-exactprint, ghcide, haskell-lsp, hls-plugin-api, lens, shake
-, lib, stdenv, text, transformers, unordered-containers
+, lib, text, transformers, unordered-containers
 }:
 mkDerivation {
   pname = "hls-class-plugin";
diff --git a/pkgs/development/tools/haskell/haskell-language-server/hls-eval-plugin.nix b/pkgs/development/tools/haskell/haskell-language-server/hls-eval-plugin.nix
index b5774ddcbfd..2677b45a591 100644
--- a/pkgs/development/tools/haskell/haskell-language-server/hls-eval-plugin.nix
+++ b/pkgs/development/tools/haskell/haskell-language-server/hls-eval-plugin.nix
@@ -2,7 +2,7 @@
 , extra, fetchgit, filepath, ghc, ghc-boot-th, ghc-paths, ghcide
 , hashable, haskell-lsp, haskell-lsp-types, hls-plugin-api
 , parser-combinators, pretty-simple, QuickCheck, safe-exceptions
-, shake, lib, stdenv, temporary, text, time, transformers
+, shake, lib, temporary, text, time, transformers
 , unordered-containers
 }:
 mkDerivation {
diff --git a/pkgs/development/tools/haskell/haskell-language-server/hls-explicit-imports-plugin.nix b/pkgs/development/tools/haskell/haskell-language-server/hls-explicit-imports-plugin.nix
index 1c7d31004b6..8207b5181ba 100644
--- a/pkgs/development/tools/haskell/haskell-language-server/hls-explicit-imports-plugin.nix
+++ b/pkgs/development/tools/haskell/haskell-language-server/hls-explicit-imports-plugin.nix
@@ -1,5 +1,5 @@
 { mkDerivation, aeson, base, containers, deepseq, fetchgit, ghc
-, ghcide, haskell-lsp-types, hls-plugin-api, shake, lib, stdenv, text
+, ghcide, haskell-lsp-types, hls-plugin-api, shake, lib, text
 , unordered-containers
 }:
 mkDerivation {
diff --git a/pkgs/development/tools/haskell/haskell-language-server/hls-hlint-plugin.nix b/pkgs/development/tools/haskell/haskell-language-server/hls-hlint-plugin.nix
index 4a90933d1e7..02e314cba3a 100644
--- a/pkgs/development/tools/haskell/haskell-language-server/hls-hlint-plugin.nix
+++ b/pkgs/development/tools/haskell/haskell-language-server/hls-hlint-plugin.nix
@@ -2,7 +2,7 @@
 , containers, data-default, deepseq, Diff, directory, extra
 , fetchgit, filepath, ghc, ghc-lib, ghc-lib-parser-ex, ghcide
 , hashable, haskell-lsp, hlint, hls-plugin-api, hslogger, lens
-, regex-tdfa, shake, lib, stdenv, temporary, text, transformers
+, regex-tdfa, shake, lib, temporary, text, transformers
 , unordered-containers
 }:
 mkDerivation {
diff --git a/pkgs/development/tools/haskell/haskell-language-server/hls-retrie-plugin.nix b/pkgs/development/tools/haskell/haskell-language-server/hls-retrie-plugin.nix
index 311a26633a5..cca8acb8819 100644
--- a/pkgs/development/tools/haskell/haskell-language-server/hls-retrie-plugin.nix
+++ b/pkgs/development/tools/haskell/haskell-language-server/hls-retrie-plugin.nix
@@ -1,6 +1,6 @@
 { mkDerivation, aeson, base, containers, deepseq, directory, extra
 , fetchgit, ghc, ghcide, hashable, haskell-lsp, haskell-lsp-types
-, hls-plugin-api, retrie, safe-exceptions, shake, lib, stdenv, text
+, hls-plugin-api, retrie, safe-exceptions, shake, lib, text
 , transformers, unordered-containers
 }:
 mkDerivation {
diff --git a/pkgs/development/tools/haskell/haskell-language-server/hls-tactics-plugin.nix b/pkgs/development/tools/haskell/haskell-language-server/hls-tactics-plugin.nix
index 4f476431d9b..369ce0e27b8 100644
--- a/pkgs/development/tools/haskell/haskell-language-server/hls-tactics-plugin.nix
+++ b/pkgs/development/tools/haskell/haskell-language-server/hls-tactics-plugin.nix
@@ -2,7 +2,7 @@
 , directory, extra, fetchgit, filepath, fingertree, generic-lens
 , ghc, ghc-boot-th, ghc-exactprint, ghc-source-gen, ghcide
 , haskell-lsp, hie-bios, hls-plugin-api, hspec, hspec-discover
-, lens, mtl, QuickCheck, refinery, retrie, shake, lib, stdenv, syb, text
+, lens, mtl, QuickCheck, refinery, retrie, shake, lib, syb, text
 , transformers
 }:
 mkDerivation {
diff --git a/pkgs/development/tools/haskell/vaultenv/default.nix b/pkgs/development/tools/haskell/vaultenv/default.nix
index 42cf3322420..8c817e8eeef 100644
--- a/pkgs/development/tools/haskell/vaultenv/default.nix
+++ b/pkgs/development/tools/haskell/vaultenv/default.nix
@@ -1,7 +1,7 @@
 { mkDerivation, async, base, bytestring, connection, containers
 , directory, hpack, hspec, hspec-discover, hspec-expectations
 , http-client, http-conduit, lens, lens-aeson, megaparsec, mtl
-, optparse-applicative, parser-combinators, retry, lib, stdenv, text
+, optparse-applicative, parser-combinators, retry, lib, text
 , unix, unordered-containers, utf8-string, fetchzip, dotenv
 }:
 mkDerivation rec {
diff --git a/pkgs/development/tools/hcloud/default.nix b/pkgs/development/tools/hcloud/default.nix
index 5c4fe48f60f..3e6ef4d4d34 100644
--- a/pkgs/development/tools/hcloud/default.nix
+++ b/pkgs/development/tools/hcloud/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub, installShellFiles }:
+{ lib, buildGoModule, fetchFromGitHub, installShellFiles }:
 
 buildGoModule rec {
   pname = "hcloud";
diff --git a/pkgs/development/tools/icr/default.nix b/pkgs/development/tools/icr/default.nix
index ca052c0f210..11e52f77cb8 100644
--- a/pkgs/development/tools/icr/default.nix
+++ b/pkgs/development/tools/icr/default.nix
@@ -1,5 +1,4 @@
-{ stdenv
-, lib
+{ lib
 , fetchFromGitHub
 , crystal
 , shards
diff --git a/pkgs/development/tools/jd/default.nix b/pkgs/development/tools/jd/default.nix
index 772e2802ff5..96d2807b9ab 100644
--- a/pkgs/development/tools/jd/default.nix
+++ b/pkgs/development/tools/jd/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchgit }:
+{ lib, buildGoPackage, fetchgit }:
 
 buildGoPackage rec {
   pname = "jd";
diff --git a/pkgs/development/tools/jid/default.nix b/pkgs/development/tools/jid/default.nix
index 5e4e3df6942..b48de54dd22 100644
--- a/pkgs/development/tools/jid/default.nix
+++ b/pkgs/development/tools/jid/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "jid";
diff --git a/pkgs/development/tools/jira_cli/default.nix b/pkgs/development/tools/jira_cli/default.nix
index 7b7647da033..cf15a61477e 100644
--- a/pkgs/development/tools/jira_cli/default.nix
+++ b/pkgs/development/tools/jira_cli/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, libffi, openssl, python3Packages }:
+{ lib, libffi, openssl, python3Packages }:
 let
   inherit (python3Packages) fetchPypi buildPythonApplication vcrpy mock hiro;
 in
diff --git a/pkgs/development/tools/jl/default.nix b/pkgs/development/tools/jl/default.nix
index e0bf896c149..15347432f70 100644
--- a/pkgs/development/tools/jl/default.nix
+++ b/pkgs/development/tools/jl/default.nix
@@ -1,6 +1,6 @@
 { mkDerivation, fetchFromGitHub, fetchpatch
 , aeson, aeson-pretty, attoparsec, base, bytestring, conduit, conduit-extra
-, containers, exceptions, mtl, optparse-simple, parsec, scientific, lib, stdenv
+, containers, exceptions, mtl, optparse-simple, parsec, scientific, lib
 , text, unordered-containers, vector
 }:
 mkDerivation rec {
diff --git a/pkgs/development/tools/jmespath/default.nix b/pkgs/development/tools/jmespath/default.nix
index f5a7092e60f..5abbf71e7f4 100644
--- a/pkgs/development/tools/jmespath/default.nix
+++ b/pkgs/development/tools/jmespath/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "jmespath";
diff --git a/pkgs/development/tools/jp/default.nix b/pkgs/development/tools/jp/default.nix
index d8d703feed3..f1f5b37c10d 100644
--- a/pkgs/development/tools/jp/default.nix
+++ b/pkgs/development/tools/jp/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "jp";
diff --git a/pkgs/development/tools/just/default.nix b/pkgs/development/tools/just/default.nix
index bbdd1bd016d..e96d8f38af4 100644
--- a/pkgs/development/tools/just/default.nix
+++ b/pkgs/development/tools/just/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, rustPlatform, coreutils, bash, installShellFiles }:
+{ lib, fetchFromGitHub, rustPlatform, coreutils, bash, installShellFiles }:
 
 rustPlatform.buildRustPackage rec {
   pname = "just";
diff --git a/pkgs/development/tools/k6/default.nix b/pkgs/development/tools/k6/default.nix
index 6a8fe4caf01..6a94d40c206 100644
--- a/pkgs/development/tools/k6/default.nix
+++ b/pkgs/development/tools/k6/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "k6";
diff --git a/pkgs/development/tools/kcli/default.nix b/pkgs/development/tools/kcli/default.nix
index 6c9f62c6f72..9cd1c976162 100644
--- a/pkgs/development/tools/kcli/default.nix
+++ b/pkgs/development/tools/kcli/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "kcli";
diff --git a/pkgs/development/tools/kind/default.nix b/pkgs/development/tools/kind/default.nix
index 3fff2aae1f4..47b23ae2342 100644
--- a/pkgs/development/tools/kind/default.nix
+++ b/pkgs/development/tools/kind/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub, installShellFiles }:
+{ lib, buildGoModule, fetchFromGitHub, installShellFiles }:
 
 with lib;
 
diff --git a/pkgs/development/tools/krew/default.nix b/pkgs/development/tools/krew/default.nix
index 7449d6df38e..f2a4f390f82 100644
--- a/pkgs/development/tools/krew/default.nix
+++ b/pkgs/development/tools/krew/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "krew";
diff --git a/pkgs/development/tools/kubectx/default.nix b/pkgs/development/tools/kubectx/default.nix
index f2186709e83..46955855332 100644
--- a/pkgs/development/tools/kubectx/default.nix
+++ b/pkgs/development/tools/kubectx/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub, installShellFiles }:
+{ lib, buildGoModule, fetchFromGitHub, installShellFiles }:
 
 buildGoModule rec {
   pname = "kubectx";
diff --git a/pkgs/development/tools/kubeprompt/default.nix b/pkgs/development/tools/kubeprompt/default.nix
index 4fc8f325342..39cd59cbec6 100644
--- a/pkgs/development/tools/kubeprompt/default.nix
+++ b/pkgs/development/tools/kubeprompt/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "kubeprompt";
diff --git a/pkgs/development/tools/kubicorn/default.nix b/pkgs/development/tools/kubicorn/default.nix
index f0985277a25..706b91aad25 100644
--- a/pkgs/development/tools/kubicorn/default.nix
+++ b/pkgs/development/tools/kubicorn/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 with lib;
 
diff --git a/pkgs/development/tools/lazygit/default.nix b/pkgs/development/tools/lazygit/default.nix
index 1e8ebb0d087..a2707eb72e9 100644
--- a/pkgs/development/tools/lazygit/default.nix
+++ b/pkgs/development/tools/lazygit/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "lazygit";
diff --git a/pkgs/development/tools/leaps/default.nix b/pkgs/development/tools/leaps/default.nix
index e68542e584f..934881b6781 100644
--- a/pkgs/development/tools/leaps/default.nix
+++ b/pkgs/development/tools/leaps/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "leaps";
diff --git a/pkgs/development/tools/manul/default.nix b/pkgs/development/tools/manul/default.nix
index 4265c2a7450..306c9143c5c 100644
--- a/pkgs/development/tools/manul/default.nix
+++ b/pkgs/development/tools/manul/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage {
   name = "manul-unstable-2016-09-30";
diff --git a/pkgs/development/tools/misc/circleci-cli/default.nix b/pkgs/development/tools/misc/circleci-cli/default.nix
index 73ea64f1d62..140e4869e88 100644
--- a/pkgs/development/tools/misc/circleci-cli/default.nix
+++ b/pkgs/development/tools/misc/circleci-cli/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, buildGoModule }:
+{ lib, fetchFromGitHub, buildGoModule }:
 
 buildGoModule rec {
   pname = "circleci-cli";
diff --git a/pkgs/development/tools/misc/d-feet/default.nix b/pkgs/development/tools/misc/d-feet/default.nix
index 60d3c5c4539..5c130a99c92 100644
--- a/pkgs/development/tools/misc/d-feet/default.nix
+++ b/pkgs/development/tools/misc/d-feet/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , pkg-config
 , fetchurl
 , meson
diff --git a/pkgs/development/tools/misc/docopts/default.nix b/pkgs/development/tools/misc/docopts/default.nix
index 3614270574e..74450bdfe73 100644
--- a/pkgs/development/tools/misc/docopts/default.nix
+++ b/pkgs/development/tools/misc/docopts/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "docopts";
diff --git a/pkgs/development/tools/misc/elfinfo/default.nix b/pkgs/development/tools/misc/elfinfo/default.nix
index cd19e263f0a..e3ee51c58fd 100644
--- a/pkgs/development/tools/misc/elfinfo/default.nix
+++ b/pkgs/development/tools/misc/elfinfo/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "elfinfo";
diff --git a/pkgs/development/tools/misc/gdbgui/default.nix b/pkgs/development/tools/misc/gdbgui/default.nix
index c01bb61f4f6..92338bb0323 100644
--- a/pkgs/development/tools/misc/gdbgui/default.nix
+++ b/pkgs/development/tools/misc/gdbgui/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonApplication
 , fetchPypi
 , gdb
diff --git a/pkgs/development/tools/misc/itm-tools/default.nix b/pkgs/development/tools/misc/itm-tools/default.nix
index 992b76bd62d..32c32b536d9 100644
--- a/pkgs/development/tools/misc/itm-tools/default.nix
+++ b/pkgs/development/tools/misc/itm-tools/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, rustPlatform, pkg-config }:
+{ lib, fetchFromGitHub, rustPlatform, pkg-config }:
 
 rustPlatform.buildRustPackage rec {
   pname = "itm-tools";
diff --git a/pkgs/development/tools/misc/loccount/default.nix b/pkgs/development/tools/misc/loccount/default.nix
index 59bab3742a2..32a14404c60 100644
--- a/pkgs/development/tools/misc/loccount/default.nix
+++ b/pkgs/development/tools/misc/loccount/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitLab }:
+{ lib, buildGoPackage, fetchFromGitLab }:
 buildGoPackage rec {
   pname = "loccount";
   version = "1.2";
diff --git a/pkgs/development/tools/misc/nrfutil/default.nix b/pkgs/development/tools/misc/nrfutil/default.nix
index a8a18b254b9..6d58a39f704 100644
--- a/pkgs/development/tools/misc/nrfutil/default.nix
+++ b/pkgs/development/tools/misc/nrfutil/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python37Packages, fetchFromGitHub }:
+{ lib, python37Packages, fetchFromGitHub }:
 
 with python37Packages; buildPythonApplication rec {
   pname = "nrfutil";
diff --git a/pkgs/development/tools/misc/perfect-hash/default.nix b/pkgs/development/tools/misc/perfect-hash/default.nix
index 7447bf66022..71747f0d117 100644
--- a/pkgs/development/tools/misc/perfect-hash/default.nix
+++ b/pkgs/development/tools/misc/perfect-hash/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python3, fetchFromGitHub }:
+{ lib, python3, fetchFromGitHub }:
 python3.pkgs.buildPythonApplication rec {
   pname = "perfect-hash";
   version = "0.4.1";
diff --git a/pkgs/development/tools/misc/ptags/default.nix b/pkgs/development/tools/misc/ptags/default.nix
index 0ef7a2aa73a..8406ecf298f 100644
--- a/pkgs/development/tools/misc/ptags/default.nix
+++ b/pkgs/development/tools/misc/ptags/default.nix
@@ -2,7 +2,7 @@
 , cargo
 , lib
 , rustPlatform
-, stdenv
+
 }:
 
 rustPlatform.buildRustPackage rec {
diff --git a/pkgs/development/tools/misc/scc/default.nix b/pkgs/development/tools/misc/scc/default.nix
index 49052c141a1..8a5cbbcfdfa 100644
--- a/pkgs/development/tools/misc/scc/default.nix
+++ b/pkgs/development/tools/misc/scc/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "scc";
diff --git a/pkgs/development/tools/misc/unused/default.nix b/pkgs/development/tools/misc/unused/default.nix
index 6487c3fc2c0..1a5f3efe0e6 100644
--- a/pkgs/development/tools/misc/unused/default.nix
+++ b/pkgs/development/tools/misc/unused/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, rustPlatform, cmake }:
+{ lib, fetchFromGitHub, rustPlatform, cmake }:
 rustPlatform.buildRustPackage rec {
   pname = "unused";
   version = "0.2.1";
diff --git a/pkgs/development/tools/misc/whatstyle/default.nix b/pkgs/development/tools/misc/whatstyle/default.nix
index 6afcfe871a4..d448251bf13 100644
--- a/pkgs/development/tools/misc/whatstyle/default.nix
+++ b/pkgs/development/tools/misc/whatstyle/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python3, fetchFromGitHub, clang-unwrapped }:
+{ lib, python3, fetchFromGitHub, clang-unwrapped }:
 
 python3.pkgs.buildPythonApplication rec {
   pname = "whatstyle";
diff --git a/pkgs/development/tools/modd/default.nix b/pkgs/development/tools/modd/default.nix
index efe4c960566..c42e364b88e 100644
--- a/pkgs/development/tools/modd/default.nix
+++ b/pkgs/development/tools/modd/default.nix
@@ -1,4 +1,4 @@
-{ buildGoPackage, fetchFromGitHub, lib, stdenv }:
+{ buildGoPackage, fetchFromGitHub, lib }:
 
 buildGoPackage rec {
   pname = "modd";
diff --git a/pkgs/development/tools/mustache-go/default.nix b/pkgs/development/tools/mustache-go/default.nix
index 99e4eb62156..40181f16288 100644
--- a/pkgs/development/tools/mustache-go/default.nix
+++ b/pkgs/development/tools/mustache-go/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "mustache-go";
diff --git a/pkgs/development/tools/ofono-phonesim/default.nix b/pkgs/development/tools/ofono-phonesim/default.nix
index 82ed82a67bd..c9728f9cbbf 100644
--- a/pkgs/development/tools/ofono-phonesim/default.nix
+++ b/pkgs/development/tools/ofono-phonesim/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , mkDerivation
 , fetchgit
 , autoreconfHook
diff --git a/pkgs/development/tools/out-of-tree/default.nix b/pkgs/development/tools/out-of-tree/default.nix
index 9ab69d1d5d8..4547012e2f3 100644
--- a/pkgs/development/tools/out-of-tree/default.nix
+++ b/pkgs/development/tools/out-of-tree/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchgit, qemu, docker, which, makeWrapper }:
+{ lib, buildGoModule, fetchgit, qemu, docker, which, makeWrapper }:
 
 buildGoModule rec {
   pname = "out-of-tree";
diff --git a/pkgs/development/tools/packer/default.nix b/pkgs/development/tools/packer/default.nix
index d4dd46cdcb5..16e5ac08203 100644
--- a/pkgs/development/tools/packer/default.nix
+++ b/pkgs/development/tools/packer/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 buildGoPackage rec {
   pname = "packer";
   version = "1.6.6";
diff --git a/pkgs/development/tools/packet-cli/default.nix b/pkgs/development/tools/packet-cli/default.nix
index ec07e4b058e..79457643ce6 100644
--- a/pkgs/development/tools/packet-cli/default.nix
+++ b/pkgs/development/tools/packet-cli/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "packet-cli";
diff --git a/pkgs/development/tools/packet/default.nix b/pkgs/development/tools/packet/default.nix
index 31ccf19bb05..723e5d8bb2d 100644
--- a/pkgs/development/tools/packet/default.nix
+++ b/pkgs/development/tools/packet/default.nix
@@ -1,5 +1,5 @@
 # This file was generated by https://github.com/kamilchm/go2nix v1.2.1
-{ lib, stdenv, buildGoPackage, fetchgit }:
+{ lib, buildGoPackage, fetchgit }:
 
 buildGoPackage rec {
   pname = "packet";
diff --git a/pkgs/development/tools/parinfer-rust/default.nix b/pkgs/development/tools/parinfer-rust/default.nix
index 79c8f379188..ce733b8a213 100644
--- a/pkgs/development/tools/parinfer-rust/default.nix
+++ b/pkgs/development/tools/parinfer-rust/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, rustPlatform, fetchFromGitHub, llvmPackages }:
+{ lib, rustPlatform, fetchFromGitHub, llvmPackages }:
 
 rustPlatform.buildRustPackage rec {
   pname = "parinfer-rust";
diff --git a/pkgs/development/tools/pax-rs/default.nix b/pkgs/development/tools/pax-rs/default.nix
index cda3ba5e8a8..ff4219ad09c 100644
--- a/pkgs/development/tools/pax-rs/default.nix
+++ b/pkgs/development/tools/pax-rs/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, fetchurl, rustPlatform, runCommand } :
+{ lib, fetchFromGitHub, fetchurl, rustPlatform, runCommand } :
 with rustPlatform;
 
 buildRustPackage rec {
diff --git a/pkgs/development/tools/pew/default.nix b/pkgs/development/tools/pew/default.nix
index 6ca94041bb5..2d7294ec105 100644
--- a/pkgs/development/tools/pew/default.nix
+++ b/pkgs/development/tools/pew/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python3 }:
+{ lib, python3 }:
 
 with python3.pkgs;
 
diff --git a/pkgs/development/tools/profiling/pprof/default.nix b/pkgs/development/tools/profiling/pprof/default.nix
index dd2345378d4..eab000e8d8e 100644
--- a/pkgs/development/tools/profiling/pprof/default.nix
+++ b/pkgs/development/tools/profiling/pprof/default.nix
@@ -1,5 +1,5 @@
 # This file was originally generated by https://github.com/kamilchm/go2nix v1.2.1
-{ lib, stdenv, buildGoPackage, fetchgit }:
+{ lib, buildGoPackage, fetchgit }:
 
 buildGoPackage rec {
   pname = "pprof-unstable";
diff --git a/pkgs/development/tools/purescript/spago/spago.nix b/pkgs/development/tools/purescript/spago/spago.nix
index 3f54a4f9c0e..58458ea79aa 100644
--- a/pkgs/development/tools/purescript/spago/spago.nix
+++ b/pkgs/development/tools/purescript/spago/spago.nix
@@ -6,7 +6,7 @@
 , http-conduit, http-types, lens-family-core, megaparsec, mtl
 , network-uri, open-browser, optparse-applicative, prettyprinter
 , process, QuickCheck, retry, rio, rio-orphans, safe, semver-range
-, lib, stdenv, stm, stringsearch, tar, template-haskell, temporary, text
+, lib, stm, stringsearch, tar, template-haskell, temporary, text
 , time, transformers, turtle, unliftio, unordered-containers
 , utf8-string, vector, versions, with-utf8, zlib
 }:
diff --git a/pkgs/development/tools/quicktemplate/default.nix b/pkgs/development/tools/quicktemplate/default.nix
index 4edb60d11a1..4fe51d3e046 100644
--- a/pkgs/development/tools/quicktemplate/default.nix
+++ b/pkgs/development/tools/quicktemplate/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "quicktemplate";
diff --git a/pkgs/development/tools/rdbtools/default.nix b/pkgs/development/tools/rdbtools/default.nix
index 5674876daba..e2f053c1e81 100644
--- a/pkgs/development/tools/rdbtools/default.nix
+++ b/pkgs/development/tools/rdbtools/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python }:
+{ lib, python }:
 
 with python.pkgs;
 
diff --git a/pkgs/development/tools/remarshal/default.nix b/pkgs/development/tools/remarshal/default.nix
index c37779a5293..385db11d7ff 100644
--- a/pkgs/development/tools/remarshal/default.nix
+++ b/pkgs/development/tools/remarshal/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python3Packages }:
+{ lib, python3Packages }:
 
 python3Packages.buildPythonApplication rec {
   pname = "remarshal";
diff --git a/pkgs/development/tools/renderizer/default.nix b/pkgs/development/tools/renderizer/default.nix
index 747e80adf4f..22bf5fbe904 100644
--- a/pkgs/development/tools/renderizer/default.nix
+++ b/pkgs/development/tools/renderizer/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "renderizer";
diff --git a/pkgs/development/tools/reno/default.nix b/pkgs/development/tools/reno/default.nix
index 17a334aba20..ca01f6ebfa2 100644
--- a/pkgs/development/tools/reno/default.nix
+++ b/pkgs/development/tools/reno/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , git
 , gnupg1
 , python3Packages
diff --git a/pkgs/development/tools/richgo/default.nix b/pkgs/development/tools/richgo/default.nix
index 1013c4aa8b4..81a912171f3 100644
--- a/pkgs/development/tools/richgo/default.nix
+++ b/pkgs/development/tools/richgo/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "richgo";
diff --git a/pkgs/development/tools/run/default.nix b/pkgs/development/tools/run/default.nix
index a0c169d8466..45fb2b8f957 100644
--- a/pkgs/development/tools/run/default.nix
+++ b/pkgs/development/tools/run/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 buildGoModule rec {
   pname = "run";
   version = "0.7.2";
diff --git a/pkgs/development/tools/rust/bindgen/default.nix b/pkgs/development/tools/rust/bindgen/default.nix
index eef8a5e41fd..f379e58ba16 100644
--- a/pkgs/development/tools/rust/bindgen/default.nix
+++ b/pkgs/development/tools/rust/bindgen/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, rustPlatform, clang, llvmPackages, rustfmt, writeScriptBin
+{ lib, fetchFromGitHub, rustPlatform, clang, llvmPackages, rustfmt, writeScriptBin
 , runtimeShell
 , bash
 }:
diff --git a/pkgs/development/tools/rust/cargo-binutils/default.nix b/pkgs/development/tools/rust/cargo-binutils/default.nix
index b79611ff5ec..8b40d9b686d 100644
--- a/pkgs/development/tools/rust/cargo-binutils/default.nix
+++ b/pkgs/development/tools/rust/cargo-binutils/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, fetchFromGitHub, rustPlatform, runCommand }:
+{ lib, fetchFromGitHub, rustPlatform, runCommand }:
 
 rustPlatform.buildRustPackage rec {
   pname = "cargo-binutils";
diff --git a/pkgs/development/tools/rust/cargo-embed/default.nix b/pkgs/development/tools/rust/cargo-embed/default.nix
index e4c5d8ab48c..989885e99a7 100644
--- a/pkgs/development/tools/rust/cargo-embed/default.nix
+++ b/pkgs/development/tools/rust/cargo-embed/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib
+{ lib
 , rustPlatform, fetchFromGitHub
 , libusb1, pkg-config, rustfmt }:
 
diff --git a/pkgs/development/tools/rust/cargo-flash/default.nix b/pkgs/development/tools/rust/cargo-flash/default.nix
index dbd79f179aa..39b56c2d656 100644
--- a/pkgs/development/tools/rust/cargo-flash/default.nix
+++ b/pkgs/development/tools/rust/cargo-flash/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib
+{ lib
 , rustPlatform, fetchFromGitHub
 , libusb1, pkg-config, rustfmt }:
 
diff --git a/pkgs/development/tools/rust/cargo-fuzz/default.nix b/pkgs/development/tools/rust/cargo-fuzz/default.nix
index 904ba6efb52..569c8f88da2 100644
--- a/pkgs/development/tools/rust/cargo-fuzz/default.nix
+++ b/pkgs/development/tools/rust/cargo-fuzz/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, rustPlatform }:
+{ lib, fetchFromGitHub, rustPlatform }:
 
 rustPlatform.buildRustPackage rec {
   pname = "cargo-fuzz";
diff --git a/pkgs/development/tools/rust/cargo-readme/default.nix b/pkgs/development/tools/rust/cargo-readme/default.nix
index ae638cac8a9..358c58bef4d 100644
--- a/pkgs/development/tools/rust/cargo-readme/default.nix
+++ b/pkgs/development/tools/rust/cargo-readme/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, rustPlatform, fetchFromGitHub, fetchpatch }:
+{ lib, rustPlatform, fetchFromGitHub, fetchpatch }:
 
 rustPlatform.buildRustPackage rec {
   pname = "cargo-readme";
diff --git a/pkgs/development/tools/rust/cargo-sweep/default.nix b/pkgs/development/tools/rust/cargo-sweep/default.nix
index 210449a7230..f20bdb9cc17 100644
--- a/pkgs/development/tools/rust/cargo-sweep/default.nix
+++ b/pkgs/development/tools/rust/cargo-sweep/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, rustPlatform, fetchFromGitHub }:
+{ lib, rustPlatform, fetchFromGitHub }:
 
 rustPlatform.buildRustPackage rec {
   pname = "cargo-sweep";
diff --git a/pkgs/development/tools/rust/cargo-sync-readme/default.nix b/pkgs/development/tools/rust/cargo-sync-readme/default.nix
index 45ea6c430d1..54f21ab4627 100644
--- a/pkgs/development/tools/rust/cargo-sync-readme/default.nix
+++ b/pkgs/development/tools/rust/cargo-sync-readme/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, rustPlatform, fetchFromGitHub }:
+{ lib, rustPlatform, fetchFromGitHub }:
 
 rustPlatform.buildRustPackage rec {
   pname = "cargo-sync-readme";
diff --git a/pkgs/development/tools/rust/cargo-wipe/default.nix b/pkgs/development/tools/rust/cargo-wipe/default.nix
index 6c73b245e04..c4c079c523b 100644
--- a/pkgs/development/tools/rust/cargo-wipe/default.nix
+++ b/pkgs/development/tools/rust/cargo-wipe/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , rustPlatform
 , fetchFromGitHub
 , nix-update-script
diff --git a/pkgs/development/tools/rust/cargo-xbuild/default.nix b/pkgs/development/tools/rust/cargo-xbuild/default.nix
index 2e800402c1d..8aa701779bc 100644
--- a/pkgs/development/tools/rust/cargo-xbuild/default.nix
+++ b/pkgs/development/tools/rust/cargo-xbuild/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, rustPlatform }:
+{ lib, fetchFromGitHub, rustPlatform }:
 
 rustPlatform.buildRustPackage rec {
   pname = "cargo-xbuild";
diff --git a/pkgs/development/tools/rust/svd2rust/default.nix b/pkgs/development/tools/rust/svd2rust/default.nix
index 97da8056290..6ec06fffe21 100644
--- a/pkgs/development/tools/rust/svd2rust/default.nix
+++ b/pkgs/development/tools/rust/svd2rust/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, rustPlatform }:
+{ lib, fetchFromGitHub, rustPlatform }:
 
 with rustPlatform;
 
diff --git a/pkgs/development/tools/sourcetrail/jedi.nix b/pkgs/development/tools/sourcetrail/jedi.nix
index fa25604f9fc..2e1ca55dad3 100644
--- a/pkgs/development/tools/sourcetrail/jedi.nix
+++ b/pkgs/development/tools/sourcetrail/jedi.nix
@@ -1,6 +1,6 @@
 # Taken from a past commit of nixpkgs
 
-{ lib, stdenv, buildPythonPackage, fetchPypi, pytest, glibcLocales, tox, pytestcov, parso }:
+{ lib, buildPythonPackage, fetchPypi, pytest, glibcLocales, tox, pytestcov, parso }:
 
 buildPythonPackage rec {
   pname = "jedi";
diff --git a/pkgs/development/tools/summon/default.nix b/pkgs/development/tools/summon/default.nix
index 5d851adc5ab..5c811aaf239 100644
--- a/pkgs/development/tools/summon/default.nix
+++ b/pkgs/development/tools/summon/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, buildGoModule, fetchFromGitHub, lib, patchResolver ? true }:
+{ buildGoModule, fetchFromGitHub, lib, patchResolver ? true }:
 
 with lib;
 
diff --git a/pkgs/development/tools/systemfd/default.nix b/pkgs/development/tools/systemfd/default.nix
index c25f0491c67..a1c93f46dcb 100644
--- a/pkgs/development/tools/systemfd/default.nix
+++ b/pkgs/development/tools/systemfd/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, fetchgit, darwin, buildPlatform
+{ lib, fetchgit, darwin, buildPlatform
 , buildRustCrate, buildRustCrateHelpers, defaultCrateOverrides }:
 
 ((import ./Cargo.nix {
diff --git a/pkgs/development/tools/textql/default.nix b/pkgs/development/tools/textql/default.nix
index 7dc899c4fc4..7b80192a75e 100644
--- a/pkgs/development/tools/textql/default.nix
+++ b/pkgs/development/tools/textql/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub, sqlite }:
+{ lib, buildGoPackage, fetchFromGitHub, sqlite }:
 
 buildGoPackage rec {
   pname = "textql";
diff --git a/pkgs/development/tools/unityhub/default.nix b/pkgs/development/tools/unityhub/default.nix
index 9a2c1d72caa..dc2f8022117 100644
--- a/pkgs/development/tools/unityhub/default.nix
+++ b/pkgs/development/tools/unityhub/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, appimageTools, gsettings-desktop-schemas, gtk3 }:
+{ lib, fetchurl, appimageTools, gsettings-desktop-schemas, gtk3 }:
 
 let
   version = "2.3.2";
diff --git a/pkgs/development/tools/vcstool/default.nix b/pkgs/development/tools/vcstool/default.nix
index 65f91b3324f..f37b17057e5 100644
--- a/pkgs/development/tools/vcstool/default.nix
+++ b/pkgs/development/tools/vcstool/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python3Packages
+{ lib, python3Packages
 , git, breezy, subversion }:
 
 with python3Packages;
diff --git a/pkgs/development/tools/vend/default.nix b/pkgs/development/tools/vend/default.nix
index cfadf694320..0b037a9068c 100644
--- a/pkgs/development/tools/vend/default.nix
+++ b/pkgs/development/tools/vend/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "vend";
diff --git a/pkgs/development/tools/vultr-cli/default.nix b/pkgs/development/tools/vultr-cli/default.nix
index 23dda32b723..505023f3fdd 100644
--- a/pkgs/development/tools/vultr-cli/default.nix
+++ b/pkgs/development/tools/vultr-cli/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "vultr-cli";
diff --git a/pkgs/development/tools/vultr/default.nix b/pkgs/development/tools/vultr/default.nix
index b9ca0febf97..1f101882b5b 100644
--- a/pkgs/development/tools/vultr/default.nix
+++ b/pkgs/development/tools/vultr/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "vultr";
diff --git a/pkgs/development/tools/winpdb/default.nix b/pkgs/development/tools/winpdb/default.nix
index b7eaabe8693..b5e0701c136 100644
--- a/pkgs/development/tools/winpdb/default.nix
+++ b/pkgs/development/tools/winpdb/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, pythonPackages, makeDesktopItem }:
+{ lib, fetchurl, pythonPackages, makeDesktopItem }:
 
 pythonPackages.buildPythonApplication rec {
   name = "winpdb-1.4.8";
diff --git a/pkgs/development/tools/wllvm/default.nix b/pkgs/development/tools/wllvm/default.nix
index a3702f2e3e6..85dbc4f731a 100644
--- a/pkgs/development/tools/wllvm/default.nix
+++ b/pkgs/development/tools/wllvm/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python3Packages }:
+{ lib, python3Packages }:
 
 python3Packages.buildPythonApplication rec {
   version = "1.2.8";
diff --git a/pkgs/development/tools/ws/default.nix b/pkgs/development/tools/ws/default.nix
index 3026289fec1..bef8eb906cf 100644
--- a/pkgs/development/tools/ws/default.nix
+++ b/pkgs/development/tools/ws/default.nix
@@ -1,5 +1,5 @@
 # This file was generated by https://github.com/kamilchm/go2nix v1.2.1
-{ lib, stdenv, buildGoPackage, fetchgit }:
+{ lib, buildGoPackage, fetchgit }:
 
 buildGoPackage rec {
   pname = "ws";
diff --git a/pkgs/development/tools/yaml2json/default.nix b/pkgs/development/tools/yaml2json/default.nix
index d707caaec5a..77f884b82b6 100644
--- a/pkgs/development/tools/yaml2json/default.nix
+++ b/pkgs/development/tools/yaml2json/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 
 buildGoPackage {
diff --git a/pkgs/development/tools/yj/default.nix b/pkgs/development/tools/yj/default.nix
index 68ecaf6479e..303f325dec1 100644
--- a/pkgs/development/tools/yj/default.nix
+++ b/pkgs/development/tools/yj/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "yj";
diff --git a/pkgs/development/web/shopify-themekit/default.nix b/pkgs/development/web/shopify-themekit/default.nix
index 60a3d330ab8..bf0a8c6d816 100644
--- a/pkgs/development/web/shopify-themekit/default.nix
+++ b/pkgs/development/web/shopify-themekit/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "shopify-themekit";
diff --git a/pkgs/development/web/wml/default.nix b/pkgs/development/web/wml/default.nix
index 2b882ccc841..a6ffe6e84e3 100644
--- a/pkgs/development/web/wml/default.nix
+++ b/pkgs/development/web/wml/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, perlPackages, ncurses, lynx, makeWrapper }:
+{ lib, fetchurl, perlPackages, ncurses, lynx, makeWrapper }:
 
 perlPackages.buildPerlPackage {
   pname = "wml";
diff --git a/pkgs/games/20kly/default.nix b/pkgs/games/20kly/default.nix
index e8778d7bebc..092e0e4eac2 100644
--- a/pkgs/games/20kly/default.nix
+++ b/pkgs/games/20kly/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , fetchurl
 , python }:
 
diff --git a/pkgs/games/boohu/default.nix b/pkgs/games/boohu/default.nix
index 9b46420d5ff..83189353645 100644
--- a/pkgs/games/boohu/default.nix
+++ b/pkgs/games/boohu/default.nix
@@ -1,4 +1,4 @@
-{lib, stdenv, fetchurl, buildGoPackage}:
+{lib, fetchurl, buildGoPackage}:
 
 buildGoPackage rec {
 
diff --git a/pkgs/games/chessx/default.nix b/pkgs/games/chessx/default.nix
index f63f6362558..fb7c7fddf09 100644
--- a/pkgs/games/chessx/default.nix
+++ b/pkgs/games/chessx/default.nix
@@ -1,5 +1,5 @@
 { mkDerivation
-, lib, stdenv
+, lib
 , pkg-config
 , zlib
 , qtbase
diff --git a/pkgs/games/cockatrice/default.nix b/pkgs/games/cockatrice/default.nix
index d47e0d5521d..a657913aad7 100644
--- a/pkgs/games/cockatrice/default.nix
+++ b/pkgs/games/cockatrice/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, mkDerivation, cmake, protobuf
+{ lib, fetchFromGitHub, mkDerivation, cmake, protobuf
 , qtbase, qtmultimedia, qttools, qtwebsockets, wrapQtAppsHook
 }:
 
diff --git a/pkgs/games/eidolon/default.nix b/pkgs/games/eidolon/default.nix
index 3192976b0f6..dcb72d53b32 100644
--- a/pkgs/games/eidolon/default.nix
+++ b/pkgs/games/eidolon/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchgit, rustPlatform, pkg-config, openssl }:
+{ lib, fetchgit, rustPlatform, pkg-config, openssl }:
 
 rustPlatform.buildRustPackage rec {
   pname = "eidolon";
diff --git a/pkgs/games/endgame-singularity/default.nix b/pkgs/games/endgame-singularity/default.nix
index f220a85e0eb..d6b15301872 100644
--- a/pkgs/games/endgame-singularity/default.nix
+++ b/pkgs/games/endgame-singularity/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , fetchurl
 , fetchFromGitHub
 , unzip
diff --git a/pkgs/games/enyo-doom/default.nix b/pkgs/games/enyo-doom/default.nix
index 10cce9f3bf8..eeb4086f924 100644
--- a/pkgs/games/enyo-doom/default.nix
+++ b/pkgs/games/enyo-doom/default.nix
@@ -1,4 +1,4 @@
-{ mkDerivation, lib, stdenv, fetchFromGitLab, cmake, qtbase }:
+{ mkDerivation, lib, fetchFromGitLab, cmake, qtbase }:
 
 mkDerivation rec {
   pname = "enyo-doom";
diff --git a/pkgs/games/factorio/mods.nix b/pkgs/games/factorio/mods.nix
index 8d9976689cc..7327b9e2287 100644
--- a/pkgs/games/factorio/mods.nix
+++ b/pkgs/games/factorio/mods.nix
@@ -2,7 +2,7 @@
 # mods. It will eventually be replaced by a nixos-channel that will provide
 # derivations for most or all of the mods tracked through the official mod
 # manager site.
-{ lib, stdenv, fetchurl
+{ lib, fetchurl
 , factorio-utils
 , allRecommendedMods ? true
 , allOptionalMods ? false
diff --git a/pkgs/games/frogatto/default.nix b/pkgs/games/frogatto/default.nix
index fb09847908d..69d5282aedc 100644
--- a/pkgs/games/frogatto/default.nix
+++ b/pkgs/games/frogatto/default.nix
@@ -1,4 +1,4 @@
-{ buildEnv, lib, stdenv, callPackage, makeWrapper, makeDesktopItem }:
+{ buildEnv, lib, callPackage, makeWrapper, makeDesktopItem }:
 
 let
   description = "Action-adventure game, starring a certain quixotic frog";
diff --git a/pkgs/games/frozen-bubble/default.nix b/pkgs/games/frozen-bubble/default.nix
index d1521dae3c4..6883acb6014 100644
--- a/pkgs/games/frozen-bubble/default.nix
+++ b/pkgs/games/frozen-bubble/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, perlPackages, pkg-config, SDL, SDL_mixer, SDL_Pango, glib }:
+{ lib, fetchurl, perlPackages, pkg-config, SDL, SDL_mixer, SDL_Pango, glib }:
 
 perlPackages.buildPerlModule {
   pname = "frozen-bubble";
diff --git a/pkgs/games/gscrabble/default.nix b/pkgs/games/gscrabble/default.nix
index 7d63510aa99..74411d63d3e 100644
--- a/pkgs/games/gscrabble/default.nix
+++ b/pkgs/games/gscrabble/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonApplication, fetchFromGitHub
+{ lib, buildPythonApplication, fetchFromGitHub
 , gtk3, wrapGAppsHook, gst_all_1, gobject-introspection
 , python3Packages, gnome3 }:
 
diff --git a/pkgs/games/gshogi/default.nix b/pkgs/games/gshogi/default.nix
index 5ed4bf5a376..c3479f6758a 100644
--- a/pkgs/games/gshogi/default.nix
+++ b/pkgs/games/gshogi/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonApplication, fetchFromGitHub
+{ lib, buildPythonApplication, fetchFromGitHub
 , gtk3, gobject-introspection
 , wrapGAppsHook, python3Packages }:
 
diff --git a/pkgs/games/harmonist/default.nix b/pkgs/games/harmonist/default.nix
index 0705da6bfe9..4609f7d732c 100644
--- a/pkgs/games/harmonist/default.nix
+++ b/pkgs/games/harmonist/default.nix
@@ -1,4 +1,4 @@
-{lib, stdenv, fetchurl, buildGoPackage}:
+{lib, fetchurl, buildGoPackage}:
 
 buildGoPackage rec {
 
diff --git a/pkgs/games/lunar-client/default.nix b/pkgs/games/lunar-client/default.nix
index f5c0e3faf77..0635ab8aed8 100644
--- a/pkgs/games/lunar-client/default.nix
+++ b/pkgs/games/lunar-client/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, appimageTools, lib, fetchurl, makeDesktopItem }:
+{ appimageTools, lib, fetchurl, makeDesktopItem }:
 let
   name = "lunar-client";
   version = "2.4.0";
diff --git a/pkgs/games/multimc/default.nix b/pkgs/games/multimc/default.nix
index 81fc1b98f36..5a1f42ee130 100644
--- a/pkgs/games/multimc/default.nix
+++ b/pkgs/games/multimc/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, mkDerivation, fetchFromGitHub, cmake, jdk8, zlib, file, makeWrapper, xorg, libpulseaudio, qtbase, libGL }:
+{ lib, mkDerivation, fetchFromGitHub, cmake, jdk8, zlib, file, makeWrapper, xorg, libpulseaudio, qtbase, libGL }:
 
 let
   jdk = jdk8;
diff --git a/pkgs/games/openra/common.nix b/pkgs/games/openra/common.nix
index 306c5de3b43..41c903e1011 100644
--- a/pkgs/games/openra/common.nix
+++ b/pkgs/games/openra/common.nix
@@ -1,7 +1,7 @@
 /*  The reusable code, and package attributes, between OpenRA engine packages (engine.nix)
     and out-of-tree mod packages (mod.nix).
 */
-{ lib, stdenv, makeSetupHook, curl, unzip, dos2unix, pkg-config, makeWrapper
+{ lib, makeSetupHook, curl, unzip, dos2unix, pkg-config, makeWrapper
 , lua, mono, dotnetPackages, python
 , libGL, freetype, openal, SDL2
 , zenity
diff --git a/pkgs/games/pokerth/default.nix b/pkgs/games/pokerth/default.nix
index 56f0d5a47f2..59555a8ac24 100644
--- a/pkgs/games/pokerth/default.nix
+++ b/pkgs/games/pokerth/default.nix
@@ -1,4 +1,4 @@
-{ lib, mkDerivation, stdenv, fetchFromGitHub, runCommand, fetchpatch, patchutils, qmake, qtbase
+{ lib, mkDerivation, fetchFromGitHub, runCommand, fetchpatch, patchutils, qmake, qtbase
 , SDL, SDL_mixer, boost, curl, gsasl, libgcrypt, libircclient, protobuf, sqlite
 , wrapQtAppsHook
 , tinyxml2, target ? "client" }:
diff --git a/pkgs/games/portmod/default.nix b/pkgs/games/portmod/default.nix
index 07451b8dc2a..ef535991c23 100644
--- a/pkgs/games/portmod/default.nix
+++ b/pkgs/games/portmod/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, callPackage, python3Packages, fetchFromGitLab, cacert,
+{ lib, callPackage, python3Packages, fetchFromGitLab, cacert,
   rustPlatform, bubblewrap, git, perlPackages, imagemagick7, fetchurl, fetchzip,
   jre, makeWrapper, tr-patcher, tes3cmd }:
 
diff --git a/pkgs/games/pro-office-calculator/default.nix b/pkgs/games/pro-office-calculator/default.nix
index dbe2db363ea..381a6e8742b 100644
--- a/pkgs/games/pro-office-calculator/default.nix
+++ b/pkgs/games/pro-office-calculator/default.nix
@@ -1,4 +1,4 @@
-{ mkDerivation, lib, stdenv, fetchFromGitHub, tinyxml-2, cmake, qtbase, qtmultimedia }:
+{ mkDerivation, lib, fetchFromGitHub, tinyxml-2, cmake, qtbase, qtmultimedia }:
 mkDerivation rec {
   version = "1.0.13";
   pname = "pro-office-calculator";
diff --git a/pkgs/games/pysolfc/default.nix b/pkgs/games/pysolfc/default.nix
index c765a1cbdf5..925532bbbf5 100644
--- a/pkgs/games/pysolfc/default.nix
+++ b/pkgs/games/pysolfc/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchzip, buildPythonApplication, python3Packages
+{ lib, fetchzip, buildPythonApplication, python3Packages
   , desktop-file-utils, freecell-solver }:
 
 buildPythonApplication rec {
diff --git a/pkgs/games/the-butterfly-effect/default.nix b/pkgs/games/the-butterfly-effect/default.nix
index c87d1bea1c7..f5330485edd 100644
--- a/pkgs/games/the-butterfly-effect/default.nix
+++ b/pkgs/games/the-butterfly-effect/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, mkDerivation, fetchFromGitHub, qt5, box2d, which, cmake, gettext }:
+{ lib, mkDerivation, fetchFromGitHub, qt5, box2d, which, cmake, gettext }:
 
 mkDerivation rec {
   pname = "tbe";
diff --git a/pkgs/games/wyvern/default.nix b/pkgs/games/wyvern/default.nix
index 5a6bc34fea5..f99faa282fd 100644
--- a/pkgs/games/wyvern/default.nix
+++ b/pkgs/games/wyvern/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , fetchgit
 , rustPlatform
 , unzip
diff --git a/pkgs/misc/doge/default.nix b/pkgs/misc/doge/default.nix
index 8334444ec4c..911917e6d2f 100644
--- a/pkgs/misc/doge/default.nix
+++ b/pkgs/misc/doge/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv , python3Packages }:
+{ lib, python3Packages }:
 
 python3Packages.buildPythonPackage rec {
   pname = "doge";
diff --git a/pkgs/misc/drivers/steamcontroller/default.nix b/pkgs/misc/drivers/steamcontroller/default.nix
index 77a2e03d161..db5c8e5d903 100644
--- a/pkgs/misc/drivers/steamcontroller/default.nix
+++ b/pkgs/misc/drivers/steamcontroller/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, fetchFromGitHub, python3Packages, libusb1, linuxHeaders
+{ lib, fetchFromGitHub, python3Packages, libusb1, linuxHeaders
 , GyroplotSupport ? false
 }:
 
diff --git a/pkgs/misc/emulators/citra/default.nix b/pkgs/misc/emulators/citra/default.nix
index d092a878683..e1a31d208e4 100644
--- a/pkgs/misc/emulators/citra/default.nix
+++ b/pkgs/misc/emulators/citra/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, mkDerivation, lib, fetchgit, cmake, SDL2, qtbase, qtmultimedia, boost }:
+{ mkDerivation, lib, fetchgit, cmake, SDL2, qtbase, qtmultimedia, boost }:
 
 mkDerivation {
   pname = "citra";
diff --git a/pkgs/misc/emulators/firebird-emu/default.nix b/pkgs/misc/emulators/firebird-emu/default.nix
index 236eff8610c..c766df9e3c0 100644
--- a/pkgs/misc/emulators/firebird-emu/default.nix
+++ b/pkgs/misc/emulators/firebird-emu/default.nix
@@ -1,4 +1,4 @@
-{ mkDerivation, lib, stdenv, fetchFromGitHub, qmake, qtbase, qtdeclarative }:
+{ mkDerivation, lib, fetchFromGitHub, qmake, qtbase, qtdeclarative }:
 
 mkDerivation rec {
   pname = "firebird-emu";
diff --git a/pkgs/misc/emulators/melonDS/default.nix b/pkgs/misc/emulators/melonDS/default.nix
index dbf658b8fce..b028701fe11 100644
--- a/pkgs/misc/emulators/melonDS/default.nix
+++ b/pkgs/misc/emulators/melonDS/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , fetchFromGitHub
 , mkDerivation
 , cmake
diff --git a/pkgs/misc/emulators/ruffle/default.nix b/pkgs/misc/emulators/ruffle/default.nix
index 475e54076fc..9e1f986341f 100644
--- a/pkgs/misc/emulators/ruffle/default.nix
+++ b/pkgs/misc/emulators/ruffle/default.nix
@@ -5,7 +5,7 @@
 , pkg-config
 , python3
 , rustPlatform
-, lib, stdenv
+, lib
 , wayland
 , xorg
 , vulkan-loader
diff --git a/pkgs/misc/emulators/wine/staging.nix b/pkgs/misc/emulators/wine/staging.nix
index 24da1d86bbf..abfc4f832a3 100644
--- a/pkgs/misc/emulators/wine/staging.nix
+++ b/pkgs/misc/emulators/wine/staging.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, callPackage, wineUnstable }:
+{ lib, callPackage, wineUnstable }:
 
 with callPackage ./util.nix {};
 
diff --git a/pkgs/misc/emulators/yabause/default.nix b/pkgs/misc/emulators/yabause/default.nix
index 43f077227db..17b7b563c15 100644
--- a/pkgs/misc/emulators/yabause/default.nix
+++ b/pkgs/misc/emulators/yabause/default.nix
@@ -1,4 +1,4 @@
-{ mkDerivation, lib, stdenv, fetchurl, cmake, pkg-config, qtbase, qt5, libGLU, libGL
+{ mkDerivation, lib, fetchurl, cmake, pkg-config, qtbase, qt5, libGLU, libGL
 , freeglut ? null, openal ? null, SDL2 ? null }:
 
 mkDerivation rec {
diff --git a/pkgs/misc/lilypond/with-fonts.nix b/pkgs/misc/lilypond/with-fonts.nix
index c4de45421f2..2f3a95a3302 100644
--- a/pkgs/misc/lilypond/with-fonts.nix
+++ b/pkgs/misc/lilypond/with-fonts.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, lndir, symlinkJoin, makeWrapper
+{ lib, lndir, symlinkJoin, makeWrapper
 , lilypond, openlilylib-fonts
 }:
 
diff --git a/pkgs/misc/logging/beats/6.x.nix b/pkgs/misc/logging/beats/6.x.nix
index 1be14ecec9b..ce80b174d32 100644
--- a/pkgs/misc/logging/beats/6.x.nix
+++ b/pkgs/misc/logging/beats/6.x.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, fetchFromGitHub, elk6Version, buildGoPackage, libpcap, systemd }:
+{ lib, fetchFromGitHub, elk6Version, buildGoPackage, libpcap, systemd }:
 
 let beat = package : extraArgs : buildGoPackage (rec {
       name = "${package}-${version}";
diff --git a/pkgs/misc/logging/beats/7.x.nix b/pkgs/misc/logging/beats/7.x.nix
index d7416731e63..43ea85508c6 100644
--- a/pkgs/misc/logging/beats/7.x.nix
+++ b/pkgs/misc/logging/beats/7.x.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, fetchFromGitHub, elk7Version, buildGoPackage, libpcap, systemd }:
+{ lib, fetchFromGitHub, elk7Version, buildGoPackage, libpcap, systemd }:
 
 let beat = package : extraArgs : buildGoPackage (rec {
       name = "${package}-${version}";
diff --git a/pkgs/misc/vscode-extensions/cpptools/default.nix b/pkgs/misc/vscode-extensions/cpptools/default.nix
index bb547b3d34d..188da860530 100644
--- a/pkgs/misc/vscode-extensions/cpptools/default.nix
+++ b/pkgs/misc/vscode-extensions/cpptools/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, vscode-utils
+{ lib, vscode-utils
 , fetchurl, unzip
 , mono, writeScript, runtimeShell
 , jq, clang-tools
diff --git a/pkgs/misc/vscode-extensions/default.nix b/pkgs/misc/vscode-extensions/default.nix
index f561755fc4b..b894eb7fa4d 100644
--- a/pkgs/misc/vscode-extensions/default.nix
+++ b/pkgs/misc/vscode-extensions/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, config, lib, callPackage, vscode-utils, nodePackages,llvmPackages_8, llvmPackages_latest }:
+{ config, lib, callPackage, vscode-utils, nodePackages,llvmPackages_8, llvmPackages_latest }:
 
 let
   inherit (vscode-utils) buildVscodeMarketplaceExtension;
diff --git a/pkgs/misc/vscode-extensions/remote-ssh/default.nix b/pkgs/misc/vscode-extensions/remote-ssh/default.nix
index 82924f369ae..746bb4608ab 100644
--- a/pkgs/misc/vscode-extensions/remote-ssh/default.nix
+++ b/pkgs/misc/vscode-extensions/remote-ssh/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , vscode-utils
 , useLocalExtensions ? false}:
 # Note that useLocalExtensions requires that vscode-server is not running
diff --git a/pkgs/misc/vscode-extensions/rust-analyzer/default.nix b/pkgs/misc/vscode-extensions/rust-analyzer/default.nix
index d19027fa576..0136bf4e5b1 100644
--- a/pkgs/misc/vscode-extensions/rust-analyzer/default.nix
+++ b/pkgs/misc/vscode-extensions/rust-analyzer/default.nix
@@ -1,5 +1,5 @@
 # Update script: pkgs/development/tools/rust/rust-analyzer/update.sh
-{ lib, stdenv, vscode-utils, jq, rust-analyzer, nodePackages
+{ lib, vscode-utils, jq, rust-analyzer, nodePackages
 , setDefaultServerPath ? true
 }:
 
diff --git a/pkgs/misc/vscode-extensions/wakatime/default.nix b/pkgs/misc/vscode-extensions/wakatime/default.nix
index 336cd059f57..86453b960cb 100644
--- a/pkgs/misc/vscode-extensions/wakatime/default.nix
+++ b/pkgs/misc/vscode-extensions/wakatime/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , wakatime, vscode-utils }:
 
 let
diff --git a/pkgs/os-specific/darwin/apple-source-releases/CarbonHeaders/default.nix b/pkgs/os-specific/darwin/apple-source-releases/CarbonHeaders/default.nix
index 9afd4b475de..b53c5985a21 100644
--- a/pkgs/os-specific/darwin/apple-source-releases/CarbonHeaders/default.nix
+++ b/pkgs/os-specific/darwin/apple-source-releases/CarbonHeaders/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, appleDerivation }:
+{ lib, appleDerivation }:
 
 appleDerivation {
   dontBuild = true;
diff --git a/pkgs/os-specific/darwin/apple-source-releases/CommonCrypto/default.nix b/pkgs/os-specific/darwin/apple-source-releases/CommonCrypto/default.nix
index 3e5399dbb35..609cd579f9f 100644
--- a/pkgs/os-specific/darwin/apple-source-releases/CommonCrypto/default.nix
+++ b/pkgs/os-specific/darwin/apple-source-releases/CommonCrypto/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, appleDerivation }:
+{ lib, appleDerivation }:
 
 appleDerivation {
   installPhase = ''
diff --git a/pkgs/os-specific/darwin/apple-source-releases/Csu/default.nix b/pkgs/os-specific/darwin/apple-source-releases/Csu/default.nix
index 2f6c8319b1c..e3b3179d4a3 100644
--- a/pkgs/os-specific/darwin/apple-source-releases/Csu/default.nix
+++ b/pkgs/os-specific/darwin/apple-source-releases/Csu/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, appleDerivation }:
+{ lib, appleDerivation }:
 
 appleDerivation {
   prePatch = ''
diff --git a/pkgs/os-specific/darwin/apple-source-releases/IOKit/default.nix b/pkgs/os-specific/darwin/apple-source-releases/IOKit/default.nix
index cb54212f217..0ba61ccb491 100644
--- a/pkgs/os-specific/darwin/apple-source-releases/IOKit/default.nix
+++ b/pkgs/os-specific/darwin/apple-source-releases/IOKit/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, appleDerivation, IOKitSrcs, xnu, darwin-stubs }:
+{ lib, appleDerivation, IOKitSrcs, xnu, darwin-stubs }:
 
 # Someday it'll make sense to split these out into their own packages, but today is not that day.
 appleDerivation {
diff --git a/pkgs/os-specific/darwin/apple-source-releases/Librpcsvc/default.nix b/pkgs/os-specific/darwin/apple-source-releases/Librpcsvc/default.nix
index 7f93a87837a..1bf6396d47f 100644
--- a/pkgs/os-specific/darwin/apple-source-releases/Librpcsvc/default.nix
+++ b/pkgs/os-specific/darwin/apple-source-releases/Librpcsvc/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, appleDerivation, developer_cmds }:
+{ lib, appleDerivation, developer_cmds }:
 
 appleDerivation {
   buildInputs = [ developer_cmds ];
diff --git a/pkgs/os-specific/darwin/apple-source-releases/Libsystem/default.nix b/pkgs/os-specific/darwin/apple-source-releases/Libsystem/default.nix
index a5508b5ec12..ad3f5dea975 100644
--- a/pkgs/os-specific/darwin/apple-source-releases/Libsystem/default.nix
+++ b/pkgs/os-specific/darwin/apple-source-releases/Libsystem/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, appleDerivation, cpio, xnu, Libc, Libm, libdispatch, cctools, Libinfo
+{ lib, appleDerivation, cpio, xnu, Libc, Libm, libdispatch, cctools, Libinfo
 , dyld, Csu, architecture, libclosure, CarbonHeaders, ncurses, CommonCrypto
 , copyfile, removefile, libresolv, Libnotify, libplatform, libpthread
 , mDNSResponder, launchd, libutil, hfs, darling, darwin-stubs }:
diff --git a/pkgs/os-specific/darwin/apple-source-releases/adv_cmds/boot.nix b/pkgs/os-specific/darwin/apple-source-releases/adv_cmds/boot.nix
index 4f719ef8463..4855c532acb 100644
--- a/pkgs/os-specific/darwin/apple-source-releases/adv_cmds/boot.nix
+++ b/pkgs/os-specific/darwin/apple-source-releases/adv_cmds/boot.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, appleDerivation, fetchzip, bsdmake, perl, flex, yacc
+{ lib, appleDerivation, fetchzip, bsdmake, perl, flex, yacc
 }:
 
 # this derivation sucks
diff --git a/pkgs/os-specific/darwin/apple-source-releases/adv_cmds/default.nix b/pkgs/os-specific/darwin/apple-source-releases/adv_cmds/default.nix
index 614bdf570f3..6e659df4d62 100644
--- a/pkgs/os-specific/darwin/apple-source-releases/adv_cmds/default.nix
+++ b/pkgs/os-specific/darwin/apple-source-releases/adv_cmds/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, appleDerivation, xcbuild, ncurses, libutil }:
+{ lib, appleDerivation, xcbuild, ncurses, libutil }:
 
 appleDerivation {
   # We can't just run the root build, because https://github.com/facebook/xcbuild/issues/264
diff --git a/pkgs/os-specific/darwin/apple-source-releases/architecture/default.nix b/pkgs/os-specific/darwin/apple-source-releases/architecture/default.nix
index f7503dbb953..5a3b1710216 100644
--- a/pkgs/os-specific/darwin/apple-source-releases/architecture/default.nix
+++ b/pkgs/os-specific/darwin/apple-source-releases/architecture/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, appleDerivation }:
+{ lib, appleDerivation }:
 
 appleDerivation {
   dontBuild = true;
diff --git a/pkgs/os-specific/darwin/apple-source-releases/basic_cmds/default.nix b/pkgs/os-specific/darwin/apple-source-releases/basic_cmds/default.nix
index 8cff145661f..7d011d2d8cc 100644
--- a/pkgs/os-specific/darwin/apple-source-releases/basic_cmds/default.nix
+++ b/pkgs/os-specific/darwin/apple-source-releases/basic_cmds/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, appleDerivation, xcbuildHook }:
+{ lib, appleDerivation, xcbuildHook }:
 
 appleDerivation {
   nativeBuildInputs = [ xcbuildHook ];
diff --git a/pkgs/os-specific/darwin/apple-source-releases/bootstrap_cmds/default.nix b/pkgs/os-specific/darwin/apple-source-releases/bootstrap_cmds/default.nix
index 5819101e10a..27a7f7b3e7c 100644
--- a/pkgs/os-specific/darwin/apple-source-releases/bootstrap_cmds/default.nix
+++ b/pkgs/os-specific/darwin/apple-source-releases/bootstrap_cmds/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, appleDerivation, yacc, flex }:
+{ lib, appleDerivation, yacc, flex }:
 
 appleDerivation {
   nativeBuildInputs = [ yacc flex ];
diff --git a/pkgs/os-specific/darwin/apple-source-releases/bsdmake/default.nix b/pkgs/os-specific/darwin/apple-source-releases/bsdmake/default.nix
index 5a5a603eae8..6f666019c3b 100644
--- a/pkgs/os-specific/darwin/apple-source-releases/bsdmake/default.nix
+++ b/pkgs/os-specific/darwin/apple-source-releases/bsdmake/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, appleDerivation, makeWrapper }:
+{ lib, appleDerivation, makeWrapper }:
 
 appleDerivation {
   nativeBuildInputs = [ makeWrapper ];
diff --git a/pkgs/os-specific/darwin/apple-source-releases/developer_cmds/default.nix b/pkgs/os-specific/darwin/apple-source-releases/developer_cmds/default.nix
index db57537bacb..77de079e2f0 100644
--- a/pkgs/os-specific/darwin/apple-source-releases/developer_cmds/default.nix
+++ b/pkgs/os-specific/darwin/apple-source-releases/developer_cmds/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, appleDerivation, xcbuildHook, llvmPackages }:
+{ lib, appleDerivation, xcbuildHook, llvmPackages }:
 
 appleDerivation {
   nativeBuildInputs = [ xcbuildHook ];
diff --git a/pkgs/os-specific/darwin/apple-source-releases/diskdev_cmds/default.nix b/pkgs/os-specific/darwin/apple-source-releases/diskdev_cmds/default.nix
index e46e826053f..1daa4929610 100644
--- a/pkgs/os-specific/darwin/apple-source-releases/diskdev_cmds/default.nix
+++ b/pkgs/os-specific/darwin/apple-source-releases/diskdev_cmds/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, appleDerivation, xcbuildHook
+{ lib, appleDerivation, xcbuildHook
 , Libc, xnu, libutil }:
 
 appleDerivation {
diff --git a/pkgs/os-specific/darwin/apple-source-releases/dyld/default.nix b/pkgs/os-specific/darwin/apple-source-releases/dyld/default.nix
index 4a72ea337eb..01d44d22f5e 100644
--- a/pkgs/os-specific/darwin/apple-source-releases/dyld/default.nix
+++ b/pkgs/os-specific/darwin/apple-source-releases/dyld/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, appleDerivation }:
+{ lib, appleDerivation }:
 
 appleDerivation {
   installPhase = ''
diff --git a/pkgs/os-specific/darwin/apple-source-releases/file_cmds/default.nix b/pkgs/os-specific/darwin/apple-source-releases/file_cmds/default.nix
index 407117f1dbd..258d9785e70 100644
--- a/pkgs/os-specific/darwin/apple-source-releases/file_cmds/default.nix
+++ b/pkgs/os-specific/darwin/apple-source-releases/file_cmds/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, appleDerivation, xcbuildHook, zlib, bzip2, lzma, ncurses, libutil }:
+{ lib, appleDerivation, xcbuildHook, zlib, bzip2, lzma, ncurses, libutil }:
 
 appleDerivation {
   nativeBuildInputs = [ xcbuildHook ];
diff --git a/pkgs/os-specific/darwin/apple-source-releases/libpthread/default.nix b/pkgs/os-specific/darwin/apple-source-releases/libpthread/default.nix
index ceb4b18df17..d9a9beaccfc 100644
--- a/pkgs/os-specific/darwin/apple-source-releases/libpthread/default.nix
+++ b/pkgs/os-specific/darwin/apple-source-releases/libpthread/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, appleDerivation, libdispatch, xnu }:
+{ lib, appleDerivation, libdispatch, xnu }:
 
 appleDerivation {
   propagatedBuildInputs = [ libdispatch xnu ];
diff --git a/pkgs/os-specific/darwin/apple-source-releases/libunwind/default.nix b/pkgs/os-specific/darwin/apple-source-releases/libunwind/default.nix
index 24986e28852..5021d3cd7fe 100644
--- a/pkgs/os-specific/darwin/apple-source-releases/libunwind/default.nix
+++ b/pkgs/os-specific/darwin/apple-source-releases/libunwind/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, appleDerivation }:
+{ lib, appleDerivation }:
 
 appleDerivation {
   buildPhase = ":";
diff --git a/pkgs/os-specific/darwin/apple-source-releases/network_cmds/default.nix b/pkgs/os-specific/darwin/apple-source-releases/network_cmds/default.nix
index f216a820dd4..dd3cf030952 100644
--- a/pkgs/os-specific/darwin/apple-source-releases/network_cmds/default.nix
+++ b/pkgs/os-specific/darwin/apple-source-releases/network_cmds/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, appleDerivation, xcbuildHook
+{ lib, appleDerivation, xcbuildHook
 , openssl_1_0_2, Librpcsvc, xnu, libpcap, developer_cmds }:
 
 appleDerivation {
diff --git a/pkgs/os-specific/darwin/apple-source-releases/shell_cmds/default.nix b/pkgs/os-specific/darwin/apple-source-releases/shell_cmds/default.nix
index 771dd41b575..e2e13a168f0 100644
--- a/pkgs/os-specific/darwin/apple-source-releases/shell_cmds/default.nix
+++ b/pkgs/os-specific/darwin/apple-source-releases/shell_cmds/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, appleDerivation, xcbuildHook }:
+{ lib, appleDerivation, xcbuildHook }:
 
 appleDerivation {
   nativeBuildInputs = [ xcbuildHook ];
diff --git a/pkgs/os-specific/darwin/apple-source-releases/text_cmds/default.nix b/pkgs/os-specific/darwin/apple-source-releases/text_cmds/default.nix
index d5dca4a3035..3f0c91db91c 100644
--- a/pkgs/os-specific/darwin/apple-source-releases/text_cmds/default.nix
+++ b/pkgs/os-specific/darwin/apple-source-releases/text_cmds/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, appleDerivation, xcbuildHook, ncurses, bzip2, zlib, lzma }:
+{ lib, appleDerivation, xcbuildHook, ncurses, bzip2, zlib, lzma }:
 
 appleDerivation {
   nativeBuildInputs = [ xcbuildHook ];
diff --git a/pkgs/os-specific/darwin/stubs/default.nix b/pkgs/os-specific/darwin/stubs/default.nix
index e21f00beb5a..862305a069d 100644
--- a/pkgs/os-specific/darwin/stubs/default.nix
+++ b/pkgs/os-specific/darwin/stubs/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, writeScriptBin, runtimeShell }:
+{ lib, writeScriptBin, runtimeShell }:
 
 let fake = name: lib.overrideDerivation (writeScriptBin name ''
   #!${runtimeShell}
diff --git a/pkgs/os-specific/darwin/xcode/sdk-pkgs.nix b/pkgs/os-specific/darwin/xcode/sdk-pkgs.nix
index cc485bb62c6..16ed52ea81e 100644
--- a/pkgs/os-specific/darwin/xcode/sdk-pkgs.nix
+++ b/pkgs/os-specific/darwin/xcode/sdk-pkgs.nix
@@ -2,7 +2,7 @@
 , clang-unwrapped
 , binutils-unwrapped
 , runCommand
-, stdenv
+
 , wrapBintoolsWith
 , wrapCCWith
 , buildIosSdk, targetIosSdkPkgs
diff --git a/pkgs/os-specific/linux/busybox/sandbox-shell.nix b/pkgs/os-specific/linux/busybox/sandbox-shell.nix
index 036ea0a0f48..f5db0b25f18 100644
--- a/pkgs/os-specific/linux/busybox/sandbox-shell.nix
+++ b/pkgs/os-specific/linux/busybox/sandbox-shell.nix
@@ -1,4 +1,4 @@
-{ busybox, stdenv}:
+{ busybox}:
 
 # Minimal shell for use as basic /bin/sh in sandbox builds
 busybox.override {
diff --git a/pkgs/os-specific/linux/cpuset/default.nix b/pkgs/os-specific/linux/cpuset/default.nix
index d1a93e4247e..e82e3f5901c 100644
--- a/pkgs/os-specific/linux/cpuset/default.nix
+++ b/pkgs/os-specific/linux/cpuset/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , fetchFromGitHub
 , fetchpatch
 , pythonPackages
diff --git a/pkgs/os-specific/linux/ffado/default.nix b/pkgs/os-specific/linux/ffado/default.nix
index 25f541d7a00..e23591168f6 100644
--- a/pkgs/os-specific/linux/ffado/default.nix
+++ b/pkgs/os-specific/linux/ffado/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , mkDerivation
 , dbus
 , dbus_cplusplus
diff --git a/pkgs/os-specific/linux/firmware/zd1211/default.nix b/pkgs/os-specific/linux/firmware/zd1211/default.nix
index 9baa4eee621..15e53557126 100644
--- a/pkgs/os-specific/linux/firmware/zd1211/default.nix
+++ b/pkgs/os-specific/linux/firmware/zd1211/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchzip }:
+{ lib, fetchzip }:
 
 let
   pname = "zd1211-firmware";
diff --git a/pkgs/os-specific/linux/fscrypt/default.nix b/pkgs/os-specific/linux/fscrypt/default.nix
index db4b70037c8..b60a10c73ed 100644
--- a/pkgs/os-specific/linux/fscrypt/default.nix
+++ b/pkgs/os-specific/linux/fscrypt/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub, gnum4, pam, fscrypt-experimental }:
+{ lib, buildGoModule, fetchFromGitHub, gnum4, pam, fscrypt-experimental }:
 
 # Don't use this for anything important yet!
 
diff --git a/pkgs/os-specific/linux/iotop/default.nix b/pkgs/os-specific/linux/iotop/default.nix
index 1924e326c1e..a91175aa59f 100644
--- a/pkgs/os-specific/linux/iotop/default.nix
+++ b/pkgs/os-specific/linux/iotop/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, python3Packages, fetchpatch }:
+{ lib, fetchurl, python3Packages, fetchpatch }:
 
 python3Packages.buildPythonApplication rec {
   name = "iotop-0.6";
diff --git a/pkgs/os-specific/linux/iproute/mptcp.nix b/pkgs/os-specific/linux/iproute/mptcp.nix
index 6505d1d80ee..7285e27ff36 100644
--- a/pkgs/os-specific/linux/iproute/mptcp.nix
+++ b/pkgs/os-specific/linux/iproute/mptcp.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, iproute, fetchFromGitHub }:
+{ lib, iproute, fetchFromGitHub }:
 
 iproute.overrideAttrs (oa: rec {
   pname = "iproute_mptcp";
diff --git a/pkgs/os-specific/linux/kernel/hardened/config.nix b/pkgs/os-specific/linux/kernel/hardened/config.nix
index ffd710e632e..bd0518650d6 100644
--- a/pkgs/os-specific/linux/kernel/hardened/config.nix
+++ b/pkgs/os-specific/linux/kernel/hardened/config.nix
@@ -8,7 +8,7 @@
 #
 # See also <nixos/modules/profiles/hardened.nix>
 
-{ lib, stdenv, version }:
+{ lib, version }:
 
 with lib;
 with lib.kernel;
diff --git a/pkgs/os-specific/linux/kernel/linux-4.14.nix b/pkgs/os-specific/linux/kernel/linux-4.14.nix
index d1d9e94e2a6..193f6c3d160 100644
--- a/pkgs/os-specific/linux/kernel/linux-4.14.nix
+++ b/pkgs/os-specific/linux/kernel/linux-4.14.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPackages, fetchurl, perl, buildLinux, modDirVersionArg ? null, ... } @ args:
+{ lib, buildPackages, fetchurl, perl, buildLinux, modDirVersionArg ? null, ... } @ args:
 
 with lib;
 
diff --git a/pkgs/os-specific/linux/kernel/linux-4.19.nix b/pkgs/os-specific/linux/kernel/linux-4.19.nix
index 2bc5321ea7f..99425f984f7 100644
--- a/pkgs/os-specific/linux/kernel/linux-4.19.nix
+++ b/pkgs/os-specific/linux/kernel/linux-4.19.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPackages, fetchurl, perl, buildLinux, modDirVersionArg ? null, ... } @ args:
+{ lib, buildPackages, fetchurl, perl, buildLinux, modDirVersionArg ? null, ... } @ args:
 
 with lib;
 
diff --git a/pkgs/os-specific/linux/kernel/linux-4.4.nix b/pkgs/os-specific/linux/kernel/linux-4.4.nix
index 9c04ee72238..6b2e8f08ecb 100644
--- a/pkgs/os-specific/linux/kernel/linux-4.4.nix
+++ b/pkgs/os-specific/linux/kernel/linux-4.4.nix
@@ -1,4 +1,4 @@
-{ stdenv, buildPackages, fetchurl, perl, buildLinux, ... } @ args:
+{ buildPackages, fetchurl, perl, buildLinux, ... } @ args:
 
 buildLinux (args // rec {
   version = "4.4.253";
diff --git a/pkgs/os-specific/linux/kernel/linux-4.9.nix b/pkgs/os-specific/linux/kernel/linux-4.9.nix
index df298ade084..2c0c3457ef0 100644
--- a/pkgs/os-specific/linux/kernel/linux-4.9.nix
+++ b/pkgs/os-specific/linux/kernel/linux-4.9.nix
@@ -1,4 +1,4 @@
-{ stdenv, buildPackages, fetchurl, perl, buildLinux, ... } @ args:
+{ buildPackages, fetchurl, perl, buildLinux, ... } @ args:
 
 buildLinux (args // rec {
   version = "4.9.253";
diff --git a/pkgs/os-specific/linux/kernel/linux-5.10.nix b/pkgs/os-specific/linux/kernel/linux-5.10.nix
index 0eaa148a49c..2afabcad042 100644
--- a/pkgs/os-specific/linux/kernel/linux-5.10.nix
+++ b/pkgs/os-specific/linux/kernel/linux-5.10.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPackages, fetchurl, perl, buildLinux, modDirVersionArg ? null, ... } @ args:
+{ lib, buildPackages, fetchurl, perl, buildLinux, modDirVersionArg ? null, ... } @ args:
 
 with lib;
 
diff --git a/pkgs/os-specific/linux/kernel/linux-5.4.nix b/pkgs/os-specific/linux/kernel/linux-5.4.nix
index 0469b731b89..1d098416c3d 100644
--- a/pkgs/os-specific/linux/kernel/linux-5.4.nix
+++ b/pkgs/os-specific/linux/kernel/linux-5.4.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPackages, fetchurl, perl, buildLinux, modDirVersionArg ? null, ... } @ args:
+{ lib, buildPackages, fetchurl, perl, buildLinux, modDirVersionArg ? null, ... } @ args:
 
 with lib;
 
diff --git a/pkgs/os-specific/linux/kernel/linux-hardkernel-4.14.nix b/pkgs/os-specific/linux/kernel/linux-hardkernel-4.14.nix
index a272bd286f3..a64520ab893 100644
--- a/pkgs/os-specific/linux/kernel/linux-hardkernel-4.14.nix
+++ b/pkgs/os-specific/linux/kernel/linux-hardkernel-4.14.nix
@@ -1,4 +1,4 @@
-{ stdenv, buildPackages, fetchFromGitHub, perl, buildLinux, libelf, util-linux, ... } @ args:
+{ buildPackages, fetchFromGitHub, perl, buildLinux, libelf, util-linux, ... } @ args:
 
 buildLinux (args // rec {
   version = "4.14.165-172";
diff --git a/pkgs/os-specific/linux/kernel/linux-lqx.nix b/pkgs/os-specific/linux/kernel/linux-lqx.nix
index 35df8e99ddc..3c938fd8e6f 100644
--- a/pkgs/os-specific/linux/kernel/linux-lqx.nix
+++ b/pkgs/os-specific/linux/kernel/linux-lqx.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, buildLinux, linux_zen, ... } @ args:
+{ lib, fetchFromGitHub, buildLinux, linux_zen, ... } @ args:
 
 let
   version = "5.10.9";
diff --git a/pkgs/os-specific/linux/kernel/linux-mptcp-95.nix b/pkgs/os-specific/linux/kernel/linux-mptcp-95.nix
index f7bca36481b..cd661be1078 100644
--- a/pkgs/os-specific/linux/kernel/linux-mptcp-95.nix
+++ b/pkgs/os-specific/linux/kernel/linux-mptcp-95.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPackages, fetchFromGitHub, perl, buildLinux, structuredExtraConfig ? {}, ... } @ args:
+{ lib, buildPackages, fetchFromGitHub, perl, buildLinux, structuredExtraConfig ? {}, ... } @ args:
 let
   mptcpVersion = "0.95";
   modDirVersion = "4.19.55";
diff --git a/pkgs/os-specific/linux/kernel/linux-testing-bcachefs.nix b/pkgs/os-specific/linux/kernel/linux-testing-bcachefs.nix
index 5f0f513ff45..b1874bf3820 100644
--- a/pkgs/os-specific/linux/kernel/linux-testing-bcachefs.nix
+++ b/pkgs/os-specific/linux/kernel/linux-testing-bcachefs.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPackages, fetchFromGitHub, fetchpatch, perl, buildLinux, ... } @ args:
+{ lib, buildPackages, fetchFromGitHub, fetchpatch, perl, buildLinux, ... } @ args:
 
 buildLinux (args // {
   version = "5.9.0-2020.11.20";
diff --git a/pkgs/os-specific/linux/kernel/linux-testing.nix b/pkgs/os-specific/linux/kernel/linux-testing.nix
index 98fafaadece..5210e3ed7a8 100644
--- a/pkgs/os-specific/linux/kernel/linux-testing.nix
+++ b/pkgs/os-specific/linux/kernel/linux-testing.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPackages, fetchurl, perl, buildLinux, modDirVersionArg ? null, ... } @ args:
+{ lib, buildPackages, fetchurl, perl, buildLinux, modDirVersionArg ? null, ... } @ args:
 
 with lib;
 
diff --git a/pkgs/os-specific/linux/kernel/linux-zen.nix b/pkgs/os-specific/linux/kernel/linux-zen.nix
index aa73e7b8a3e..b30afb59ca8 100644
--- a/pkgs/os-specific/linux/kernel/linux-zen.nix
+++ b/pkgs/os-specific/linux/kernel/linux-zen.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, buildLinux, ... } @ args:
+{ lib, fetchFromGitHub, buildLinux, ... } @ args:
 
 let
   version = "5.10.9";
diff --git a/pkgs/os-specific/linux/net-tools/mptcp.nix b/pkgs/os-specific/linux/net-tools/mptcp.nix
index a9f99874367..577b7c25311 100644
--- a/pkgs/os-specific/linux/net-tools/mptcp.nix
+++ b/pkgs/os-specific/linux/net-tools/mptcp.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, nettools, fetchFromGitHub  }:
+{ lib, nettools, fetchFromGitHub  }:
 
 nettools.overrideAttrs(oa: rec {
   name = "net-tools-mptcp";
diff --git a/pkgs/os-specific/linux/oci-seccomp-bpf-hook/default.nix b/pkgs/os-specific/linux/oci-seccomp-bpf-hook/default.nix
index c74810d24d5..f15a5b63779 100644
--- a/pkgs/os-specific/linux/oci-seccomp-bpf-hook/default.nix
+++ b/pkgs/os-specific/linux/oci-seccomp-bpf-hook/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildGoModule
 , fetchFromGitHub
 , go-md2man
diff --git a/pkgs/os-specific/linux/openrazer/driver.nix b/pkgs/os-specific/linux/openrazer/driver.nix
index 32c99a8be13..4745ba818a9 100644
--- a/pkgs/os-specific/linux/openrazer/driver.nix
+++ b/pkgs/os-specific/linux/openrazer/driver.nix
@@ -7,7 +7,7 @@
 }:
 
 let
-  common = import ../../../development/python-modules/openrazer/common.nix { inherit lib stdenv fetchFromGitHub; };
+  common = import ../../../development/python-modules/openrazer/common.nix { inherit lib fetchFromGitHub; };
 in
 stdenv.mkDerivation (common // {
   name = "openrazer-${common.version}-${kernel.version}";
diff --git a/pkgs/os-specific/linux/piper/default.nix b/pkgs/os-specific/linux/piper/default.nix
index 1ef304c617f..839b3f1b78f 100644
--- a/pkgs/os-specific/linux/piper/default.nix
+++ b/pkgs/os-specific/linux/piper/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, meson, ninja, pkg-config, gettext, fetchFromGitHub, python3
+{ lib, meson, ninja, pkg-config, gettext, fetchFromGitHub, python3
 , wrapGAppsHook, gtk3, glib, desktop-file-utils, appstream-glib, gnome3
 , gobject-introspection }:
 
diff --git a/pkgs/os-specific/linux/s6-linux-init/default.nix b/pkgs/os-specific/linux/s6-linux-init/default.nix
index 2fb6c9441ed..87cc098d07d 100644
--- a/pkgs/os-specific/linux/s6-linux-init/default.nix
+++ b/pkgs/os-specific/linux/s6-linux-init/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, skawarePackages }:
+{ lib, skawarePackages }:
 
 with skawarePackages;
 
diff --git a/pkgs/os-specific/linux/s6-linux-utils/default.nix b/pkgs/os-specific/linux/s6-linux-utils/default.nix
index 209f596d273..132a0b49574 100644
--- a/pkgs/os-specific/linux/s6-linux-utils/default.nix
+++ b/pkgs/os-specific/linux/s6-linux-utils/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, skawarePackages }:
+{ lib, skawarePackages }:
 
 with skawarePackages;
 
diff --git a/pkgs/os-specific/linux/sd-switch/default.nix b/pkgs/os-specific/linux/sd-switch/default.nix
index 026488a24de..a58b7efa7b3 100644
--- a/pkgs/os-specific/linux/sd-switch/default.nix
+++ b/pkgs/os-specific/linux/sd-switch/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitLab, rustPlatform, pkg-config, dbus }:
+{ lib, fetchFromGitLab, rustPlatform, pkg-config, dbus }:
 
 rustPlatform.buildRustPackage rec {
   pname = "sd-switch";
diff --git a/pkgs/os-specific/linux/setools/default.nix b/pkgs/os-specific/linux/setools/default.nix
index bcdb622866b..0da84ab1cef 100644
--- a/pkgs/os-specific/linux/setools/default.nix
+++ b/pkgs/os-specific/linux/setools/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, python3
+{ lib, fetchFromGitHub, python3
 , libsepol, libselinux, checkpolicy
 , withGraphics ? false
 }:
diff --git a/pkgs/os-specific/linux/targetcli/default.nix b/pkgs/os-specific/linux/targetcli/default.nix
index ba1c063cc05..4d3446d5a5d 100644
--- a/pkgs/os-specific/linux/targetcli/default.nix
+++ b/pkgs/os-specific/linux/targetcli/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python3, fetchFromGitHub }:
+{ lib, python3, fetchFromGitHub }:
 
 python3.pkgs.buildPythonApplication rec {
   pname = "targetcli";
diff --git a/pkgs/os-specific/linux/trace-cmd/kernelshark.nix b/pkgs/os-specific/linux/trace-cmd/kernelshark.nix
index 4db4d64bc93..594cf6bfc42 100644
--- a/pkgs/os-specific/linux/trace-cmd/kernelshark.nix
+++ b/pkgs/os-specific/linux/trace-cmd/kernelshark.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, mkDerivation, fetchgit, qtbase, cmake, asciidoc, docbook_xsl, json_c, mesa_glu, freeglut, trace-cmd, pkg-config }:
+{ lib, mkDerivation, fetchgit, qtbase, cmake, asciidoc, docbook_xsl, json_c, mesa_glu, freeglut, trace-cmd, pkg-config }:
 mkDerivation {
   pname = "kernelshark";
   version = "1.1.0";
diff --git a/pkgs/os-specific/linux/undervolt/default.nix b/pkgs/os-specific/linux/undervolt/default.nix
index 5f4ffb50c07..cc9fb737465 100644
--- a/pkgs/os-specific/linux/undervolt/default.nix
+++ b/pkgs/os-specific/linux/undervolt/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, python3Packages }:
+{ lib, fetchFromGitHub, python3Packages }:
 
 python3Packages.buildPythonApplication rec {
   version = "0.3.0";
diff --git a/pkgs/os-specific/linux/wpa_supplicant/gui.nix b/pkgs/os-specific/linux/wpa_supplicant/gui.nix
index ab1cece0f33..d2d59ba21a5 100644
--- a/pkgs/os-specific/linux/wpa_supplicant/gui.nix
+++ b/pkgs/os-specific/linux/wpa_supplicant/gui.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, mkDerivation, fetchpatch, qtbase, qmake, inkscape, imagemagick, wpa_supplicant }:
+{ lib, mkDerivation, fetchpatch, qtbase, qmake, inkscape, imagemagick, wpa_supplicant }:
 
 mkDerivation {
   name = "wpa_gui-${wpa_supplicant.version}";
diff --git a/pkgs/servers/caddy/default.nix b/pkgs/servers/caddy/default.nix
index d48bcad1794..3e6641b8d26 100644
--- a/pkgs/servers/caddy/default.nix
+++ b/pkgs/servers/caddy/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub, nixosTests }:
+{ lib, buildGoModule, fetchFromGitHub, nixosTests }:
 
 buildGoModule rec {
   pname = "caddy";
diff --git a/pkgs/servers/cayley/default.nix b/pkgs/servers/cayley/default.nix
index 8ab171a2f43..c9d06d49771 100644
--- a/pkgs/servers/cayley/default.nix
+++ b/pkgs/servers/cayley/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "cayley";
diff --git a/pkgs/servers/cloud-print-connector/default.nix b/pkgs/servers/cloud-print-connector/default.nix
index 8e1ef831269..f6f6a0fbd71 100644
--- a/pkgs/servers/cloud-print-connector/default.nix
+++ b/pkgs/servers/cloud-print-connector/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub, avahi, cups, fetchpatch }:
+{ lib, buildGoPackage, fetchFromGitHub, avahi, cups, fetchpatch }:
 
 # TODO: Add a service for gcp-cups-connector and perhaps some other
 # kind of configuration for the same thing that gcp-connector-util
diff --git a/pkgs/servers/consul/default.nix b/pkgs/servers/consul/default.nix
index 4c0ce8d511e..9dc723417d6 100644
--- a/pkgs/servers/consul/default.nix
+++ b/pkgs/servers/consul/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub, nixosTests }:
+{ lib, buildGoModule, fetchFromGitHub, nixosTests }:
 
 buildGoModule rec {
   pname = "consul";
diff --git a/pkgs/servers/demoit/default.nix b/pkgs/servers/demoit/default.nix
index 0c6fe818775..4a499e7f878 100644
--- a/pkgs/servers/demoit/default.nix
+++ b/pkgs/servers/demoit/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildGoModule
 , fetchFromGitHub
 }:
diff --git a/pkgs/servers/dns/coredns/default.nix b/pkgs/servers/dns/coredns/default.nix
index adb1a7f329b..cdfc78d6222 100644
--- a/pkgs/servers/dns/coredns/default.nix
+++ b/pkgs/servers/dns/coredns/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "coredns";
diff --git a/pkgs/servers/foundationdb/default.nix b/pkgs/servers/foundationdb/default.nix
index 0e608051a9e..10d517179c2 100644
--- a/pkgs/servers/foundationdb/default.nix
+++ b/pkgs/servers/foundationdb/default.nix
@@ -1,4 +1,4 @@
-{ gcc6Stdenv, stdenv, gccStdenv, llvmPackages
+{ gcc6Stdenv, gccStdenv, llvmPackages
 , lib, fetchurl, fetchpatch, fetchFromGitHub
 
 , cmake, ninja, which, findutils, m4, gawk
diff --git a/pkgs/servers/gotty/default.nix b/pkgs/servers/gotty/default.nix
index c4881baeac0..7bd09569248 100644
--- a/pkgs/servers/gotty/default.nix
+++ b/pkgs/servers/gotty/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "gotty";
diff --git a/pkgs/servers/headphones/default.nix b/pkgs/servers/headphones/default.nix
index 75d15d4f378..67b328d661a 100644
--- a/pkgs/servers/headphones/default.nix
+++ b/pkgs/servers/headphones/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, python2, makeWrapper }:
+{ lib, fetchFromGitHub, python2, makeWrapper }:
 
 python2.pkgs.buildPythonApplication rec {
   pname = "headphones";
diff --git a/pkgs/servers/holochain-go/default.nix b/pkgs/servers/holochain-go/default.nix
index e6e35c35900..0d138e1f648 100644
--- a/pkgs/servers/holochain-go/default.nix
+++ b/pkgs/servers/holochain-go/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   name = "holochain-go${version}";
diff --git a/pkgs/servers/http/hyp/default.nix b/pkgs/servers/http/hyp/default.nix
index 52f345d5477..1faa85cfc14 100644
--- a/pkgs/servers/http/hyp/default.nix
+++ b/pkgs/servers/http/hyp/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, python3Packages }:
+{ lib, fetchurl, python3Packages }:
 
 python3Packages.buildPythonPackage rec {
   pname = "hyp-server";
diff --git a/pkgs/servers/hydron/default.nix b/pkgs/servers/hydron/default.nix
index 8b950ec12c5..41c69bde285 100644
--- a/pkgs/servers/hydron/default.nix
+++ b/pkgs/servers/hydron/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub, pkg-config, ffmpeg }:
+{ lib, buildGoModule, fetchFromGitHub, pkg-config, ffmpeg }:
 
 buildGoModule rec {
   pname = "hydron";
diff --git a/pkgs/servers/icingaweb2/default.nix b/pkgs/servers/icingaweb2/default.nix
index eaf16e38804..e7d9b1a2847 100644
--- a/pkgs/servers/icingaweb2/default.nix
+++ b/pkgs/servers/icingaweb2/default.nix
@@ -1,4 +1,6 @@
-{ stdenv, lib, fetchFromGitHub, makeWrapper, php }: with lib; stdenv.mkDerivation rec {
+{ stdenv, lib, fetchFromGitHub, makeWrapper, php }:
+
+stdenv.mkDerivation rec {
   pname = "icingaweb2";
   version = "2.8.2";
 
@@ -16,10 +18,10 @@
     cp -ra application bin etc library modules public $out
     cp -ra doc $out/share
 
-    wrapProgram $out/bin/icingacli --prefix PATH : "${makeBinPath [ php ]}"
+    wrapProgram $out/bin/icingacli --prefix PATH : "${lib.makeBinPath [ php ]}"
   '';
 
-  meta = {
+  meta = with lib; {
     description = "Webinterface for Icinga 2";
     longDescription = ''
       A lightweight and extensible web interface to keep an eye on your environment.
diff --git a/pkgs/servers/icingaweb2/theme-april/default.nix b/pkgs/servers/icingaweb2/theme-april/default.nix
index 7c592fca33b..0a152a7e157 100644
--- a/pkgs/servers/icingaweb2/theme-april/default.nix
+++ b/pkgs/servers/icingaweb2/theme-april/default.nix
@@ -1,4 +1,9 @@
-{ stdenv, lib, fetchFromGitHub }: with lib; stdenv.mkDerivation rec {
+{ lib
+, stdenv
+, fetchFromGitHub
+}:
+
+stdenv.mkDerivation rec {
   name = "icingaweb2-theme-april";
   version = "1.0.4";
 
@@ -14,7 +19,7 @@
     cp -r * "$out"
   '';
 
-  meta = {
+  meta = with lib; {
     description = "Icingaweb2 theme for april fools";
     homepage = "https://github.com/Mikesch-mp/icingaweb2-theme-april";
     license = licenses.publicDomain;
diff --git a/pkgs/servers/icingaweb2/theme-lsd/default.nix b/pkgs/servers/icingaweb2/theme-lsd/default.nix
index 273bcf6945d..59b8df6b4d4 100644
--- a/pkgs/servers/icingaweb2/theme-lsd/default.nix
+++ b/pkgs/servers/icingaweb2/theme-lsd/default.nix
@@ -1,4 +1,9 @@
-{ stdenv, lib, fetchFromGitHub }: with lib; stdenv.mkDerivation rec {
+{ lib
+, stdenv
+, fetchFromGitHub
+}:
+
+stdenv.mkDerivation rec {
   name = "icingaweb2-theme-lsd";
   version = "1.0.3";
 
@@ -14,7 +19,7 @@
     cp -r * "$out"
   '';
 
-  meta = {
+  meta = with lib; {
     description = "Psychadelic theme for IcingaWeb 2";
     homepage = "https://github.com/Mikesch-mp/icingaweb2-theme-lsd";
     license = licenses.publicDomain;
diff --git a/pkgs/servers/icingaweb2/theme-particles/default.nix b/pkgs/servers/icingaweb2/theme-particles/default.nix
index 3d28481cd84..ddd363701a7 100644
--- a/pkgs/servers/icingaweb2/theme-particles/default.nix
+++ b/pkgs/servers/icingaweb2/theme-particles/default.nix
@@ -1,4 +1,9 @@
-{ stdenv, lib, fetchFromGitHub }: with lib; stdenv.mkDerivation rec {
+{ lib
+, stdenv
+, fetchFromGitHub
+}:
+
+stdenv.mkDerivation rec {
   name = "icingaweb2-theme-particles";
   version = "1.0.0";
 
@@ -14,7 +19,7 @@
     cp -r * "$out"
   '';
 
-  meta = {
+  meta = with lib; {
     description = "This theme adds a nice particle effect to the login screen of Icingaweb 2";
     homepage = "https://github.com/Mikesch-mp/icingaweb2-theme-particles";
     license = licenses.publicDomain;
diff --git a/pkgs/servers/icingaweb2/theme-snow/default.nix b/pkgs/servers/icingaweb2/theme-snow/default.nix
index 941138bb0a5..5650d1ccdba 100644
--- a/pkgs/servers/icingaweb2/theme-snow/default.nix
+++ b/pkgs/servers/icingaweb2/theme-snow/default.nix
@@ -1,4 +1,9 @@
-{ stdenv, lib, fetchFromGitHub }: with lib; stdenv.mkDerivation rec {
+{ lib
+, stdenv
+, fetchFromGitHub
+}:
+
+stdenv.mkDerivation rec {
   name = "icingaweb2-theme-snow";
   version = "1.0.0";
 
@@ -20,7 +25,7 @@
     cp -r * "$out"
   '';
 
-  meta = {
+  meta = with lib; {
     description = "Snow theme for Icingaweb 2";
     homepage = "https://github.com/Mikesch-mp/icingaweb2-theme-snow";
     license = licenses.publicDomain;
diff --git a/pkgs/servers/icingaweb2/theme-spring/default.nix b/pkgs/servers/icingaweb2/theme-spring/default.nix
index a21f6cc89a2..dda26caf6a1 100644
--- a/pkgs/servers/icingaweb2/theme-spring/default.nix
+++ b/pkgs/servers/icingaweb2/theme-spring/default.nix
@@ -1,4 +1,9 @@
-{ stdenv, lib, fetchFromGitHub }: with lib; stdenv.mkDerivation rec {
+{ lib
+, stdenv
+, fetchFromGitHub
+}:
+
+stdenv.mkDerivation rec {
   name = "icingaweb2-theme-spring";
   version = "1.0.0";
 
@@ -14,7 +19,7 @@
     cp -r * "$out"
   '';
 
-  meta = {
+  meta = with lib; {
     description = "Theme with some soft colors and nice background images loaded from unsplash.com";
     homepage = "https://github.com/Mikesch-mp/icingaweb2-theme-spring";
     license = licenses.publicDomain;
diff --git a/pkgs/servers/icingaweb2/theme-unicorn/default.nix b/pkgs/servers/icingaweb2/theme-unicorn/default.nix
index a43f7d7c09a..a2bb3f9e4a2 100644
--- a/pkgs/servers/icingaweb2/theme-unicorn/default.nix
+++ b/pkgs/servers/icingaweb2/theme-unicorn/default.nix
@@ -1,4 +1,10 @@
-{ stdenv, lib, fetchurl, fetchFromGitHub }: with lib; stdenv.mkDerivation rec {
+{ lib
+, stdenv
+, fetchurl
+, fetchFromGitHub
+}:
+
+stdenv.mkDerivation rec {
   name = "icingaweb2-theme-unicorn";
   version = "1.0.2";
 
@@ -35,7 +41,7 @@
     cp unicorn.png "$out/public/img/unicorn.png"
   '';
 
-  meta = {
+  meta = with lib; {
     description = "Unicorn theme for IcingaWeb 2";
     homepage = "https://github.com/Mikesch-mp/icingaweb2-theme-unicorn";
     license = licenses.publicDomain;
diff --git a/pkgs/servers/identd/nullidentdmod/default.nix b/pkgs/servers/identd/nullidentdmod/default.nix
index b383135f2eb..ee759ac55ea 100644
--- a/pkgs/servers/identd/nullidentdmod/default.nix
+++ b/pkgs/servers/identd/nullidentdmod/default.nix
@@ -1,4 +1,6 @@
-{ lib, stdenv, fetchFromGitHub, ... }: stdenv.mkDerivation rec {
+{ lib, stdenv, fetchFromGitHub, ... }:
+
+stdenv.mkDerivation rec {
   pname = "nullidentdmod";
   version = "1.3";
 
diff --git a/pkgs/servers/irc/robustirc-bridge/default.nix b/pkgs/servers/irc/robustirc-bridge/default.nix
index d0b192010c1..2530c72cbb9 100644
--- a/pkgs/servers/irc/robustirc-bridge/default.nix
+++ b/pkgs/servers/irc/robustirc-bridge/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub, nixosTests }:
+{ lib, buildGoModule, fetchFromGitHub, nixosTests }:
 
 buildGoModule rec {
   pname = "robustirc-bridge";
diff --git a/pkgs/servers/isso/default.nix b/pkgs/servers/isso/default.nix
index 4680c37c85e..b9bce56d9fa 100644
--- a/pkgs/servers/isso/default.nix
+++ b/pkgs/servers/isso/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python3Packages, fetchFromGitHub }:
+{ lib, python3Packages, fetchFromGitHub }:
 
 with python3Packages; buildPythonApplication rec {
 
diff --git a/pkgs/servers/kapowbang/default.nix b/pkgs/servers/kapowbang/default.nix
index b52018b64f4..94a1832bd8d 100644
--- a/pkgs/servers/kapowbang/default.nix
+++ b/pkgs/servers/kapowbang/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "kapowbang";
diff --git a/pkgs/servers/livepeer/default.nix b/pkgs/servers/livepeer/default.nix
index acfa1aa2c3f..a016c8e7f09 100644
--- a/pkgs/servers/livepeer/default.nix
+++ b/pkgs/servers/livepeer/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, buildGoModule
+{ lib, fetchFromGitHub, buildGoModule
 , pkg-config, ffmpeg, gnutls
 }:
 
diff --git a/pkgs/servers/mail/mailhog/default.nix b/pkgs/servers/mail/mailhog/default.nix
index f1ba497720a..674fdbabb4e 100644
--- a/pkgs/servers/mail/mailhog/default.nix
+++ b/pkgs/servers/mail/mailhog/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "MailHog";
diff --git a/pkgs/servers/mail/mailman/default.nix b/pkgs/servers/mail/mailman/default.nix
index 57ceee948b5..9a86cc31fdd 100644
--- a/pkgs/servers/mail/mailman/default.nix
+++ b/pkgs/servers/mail/mailman/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, fetchpatch, isPy3k, alembic, aiosmtpd, dnspython
+{ lib, buildPythonPackage, fetchPypi, fetchpatch, isPy3k, alembic, aiosmtpd, dnspython
 , flufl_bounce, flufl_i18n, flufl_lock, lazr_config, lazr_delegates, passlib
 , requests, zope_configuration, click, falcon, importlib-resources
 , zope_component, lynx, postfix, authheaders, gunicorn
diff --git a/pkgs/servers/mail/mailman/hyperkitty.nix b/pkgs/servers/mail/mailman/hyperkitty.nix
index 58ef52e9c26..00cf2c1e83c 100644
--- a/pkgs/servers/mail/mailman/hyperkitty.nix
+++ b/pkgs/servers/mail/mailman/hyperkitty.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, isPy3k, isort, coverage, mock
+{ lib, buildPythonPackage, fetchPypi, isPy3k, isort, coverage, mock
 , robot-detection, django_extensions, rjsmin, cssmin, django-mailman3
 , django-haystack, flufl_lock, networkx, dateutil, defusedxml
 , django-paintstore, djangorestframework, django, django-q
diff --git a/pkgs/servers/mail/mailman/postorius.nix b/pkgs/servers/mail/mailman/postorius.nix
index ab8ad4440ab..9330de3a8f3 100644
--- a/pkgs/servers/mail/mailman/postorius.nix
+++ b/pkgs/servers/mail/mailman/postorius.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, beautifulsoup4, vcrpy, mock
+{ lib, buildPythonPackage, fetchPypi, beautifulsoup4, vcrpy, mock
 , django-mailman3, mailmanclient, readme_renderer
 }:
 
diff --git a/pkgs/servers/mail/postfix/pflogsumm.nix b/pkgs/servers/mail/postfix/pflogsumm.nix
index 1c92a4a7676..800a69e9509 100644
--- a/pkgs/servers/mail/postfix/pflogsumm.nix
+++ b/pkgs/servers/mail/postfix/pflogsumm.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, perlPackages }:
+{ lib, fetchurl, perlPackages }:
 
 perlPackages.buildPerlPackage rec {
   pname = "pflogsumm";
diff --git a/pkgs/servers/mail/postgrey/default.nix b/pkgs/servers/mail/postgrey/default.nix
index d0eaf40d06c..07b351bfb21 100644
--- a/pkgs/servers/mail/postgrey/default.nix
+++ b/pkgs/servers/mail/postgrey/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, perlPackages, lib, runCommand, postfix }:
+{ fetchurl, perlPackages, lib, runCommand, postfix }:
 
 let
     mk-perl-flags = inputs: lib.concatStringsSep " " (map (dep: "-I ${dep}/${perlPackages.perl.libPrefix}") inputs);
diff --git a/pkgs/servers/mail/spamassassin/default.nix b/pkgs/servers/mail/spamassassin/default.nix
index c5980bc8889..ff96f0e7c82 100644
--- a/pkgs/servers/mail/spamassassin/default.nix
+++ b/pkgs/servers/mail/spamassassin/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, perlPackages, makeWrapper, gnupg }:
+{ lib, fetchurl, perlPackages, makeWrapper, gnupg }:
 
 perlPackages.buildPerlPackage rec {
   pname = "SpamAssassin";
diff --git a/pkgs/servers/matterbridge/default.nix b/pkgs/servers/matterbridge/default.nix
index df22aab1f95..6d12ac84d90 100644
--- a/pkgs/servers/matterbridge/default.nix
+++ b/pkgs/servers/matterbridge/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchurl }:
+{ lib, buildGoModule, fetchurl }:
 
 buildGoModule rec {
   pname = "matterbridge";
diff --git a/pkgs/servers/mattermost/matterircd.nix b/pkgs/servers/mattermost/matterircd.nix
index 36edd851f36..3abb728bec1 100644
--- a/pkgs/servers/mattermost/matterircd.nix
+++ b/pkgs/servers/mattermost/matterircd.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "matterircd";
diff --git a/pkgs/servers/mautrix-whatsapp/default.nix b/pkgs/servers/mautrix-whatsapp/default.nix
index eea87392927..a17d8a55acc 100644
--- a/pkgs/servers/mautrix-whatsapp/default.nix
+++ b/pkgs/servers/mautrix-whatsapp/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub, olm }:
+{ lib, buildGoModule, fetchFromGitHub, olm }:
 
 buildGoModule rec {
   pname = "mautrix-whatsapp";
diff --git a/pkgs/servers/miniflux/default.nix b/pkgs/servers/miniflux/default.nix
index 55dd3d8afc5..7781124259b 100644
--- a/pkgs/servers/miniflux/default.nix
+++ b/pkgs/servers/miniflux/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub, installShellFiles, nixosTests }:
+{ lib, buildGoModule, fetchFromGitHub, installShellFiles, nixosTests }:
 
 let
   pname = "miniflux";
diff --git a/pkgs/servers/minio/default.nix b/pkgs/servers/minio/default.nix
index d54232fd7f2..9477da8a3f8 100644
--- a/pkgs/servers/minio/default.nix
+++ b/pkgs/servers/minio/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub, nixosTests }:
+{ lib, buildGoModule, fetchFromGitHub, nixosTests }:
 
 buildGoModule rec {
   pname = "minio";
diff --git a/pkgs/servers/misc/client-ip-echo/client-ip-echo.nix b/pkgs/servers/misc/client-ip-echo/client-ip-echo.nix
index a696bc41351..d6a25b3675f 100644
--- a/pkgs/servers/misc/client-ip-echo/client-ip-echo.nix
+++ b/pkgs/servers/misc/client-ip-echo/client-ip-echo.nix
@@ -1,4 +1,4 @@
-{ mkDerivation, fetchFromGitHub, base, bytestring, network, lib, stdenv }:
+{ mkDerivation, fetchFromGitHub, base, bytestring, network, lib }:
 mkDerivation {
   pname = "client-ip-echo";
   version = "0.1.0.5";
diff --git a/pkgs/servers/monitoring/alertmanager-bot/default.nix b/pkgs/servers/monitoring/alertmanager-bot/default.nix
index 7f4959e58eb..1eaaf01578f 100644
--- a/pkgs/servers/monitoring/alertmanager-bot/default.nix
+++ b/pkgs/servers/monitoring/alertmanager-bot/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "alertmanager-bot";
diff --git a/pkgs/servers/monitoring/cadvisor/default.nix b/pkgs/servers/monitoring/cadvisor/default.nix
index 63000664921..8501aa5e02c 100644
--- a/pkgs/servers/monitoring/cadvisor/default.nix
+++ b/pkgs/servers/monitoring/cadvisor/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "cadvisor";
diff --git a/pkgs/servers/monitoring/consul-alerts/default.nix b/pkgs/servers/monitoring/consul-alerts/default.nix
index 896664658cf..4cf5f6b8068 100644
--- a/pkgs/servers/monitoring/consul-alerts/default.nix
+++ b/pkgs/servers/monitoring/consul-alerts/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "consul-alerts";
diff --git a/pkgs/servers/monitoring/fusion-inventory/default.nix b/pkgs/servers/monitoring/fusion-inventory/default.nix
index 5d825dbe7f2..0034c253c77 100644
--- a/pkgs/servers/monitoring/fusion-inventory/default.nix
+++ b/pkgs/servers/monitoring/fusion-inventory/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, perlPackages, nix, dmidecode, pciutils, usbutils, iproute, nettools
+{ lib, perlPackages, nix, dmidecode, pciutils, usbutils, iproute, nettools
 , fetchFromGitHub, makeWrapper
 }:
 
diff --git a/pkgs/servers/monitoring/grafana-reporter/default.nix b/pkgs/servers/monitoring/grafana-reporter/default.nix
index 43346e9353f..da60be64603 100644
--- a/pkgs/servers/monitoring/grafana-reporter/default.nix
+++ b/pkgs/servers/monitoring/grafana-reporter/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub, tetex, makeWrapper }:
+{ lib, buildGoPackage, fetchFromGitHub, tetex, makeWrapper }:
 
 with lib;
 
diff --git a/pkgs/servers/monitoring/plugins/esxi.nix b/pkgs/servers/monitoring/plugins/esxi.nix
index 11183dcc2f2..1ca9e702e7a 100644
--- a/pkgs/servers/monitoring/plugins/esxi.nix
+++ b/pkgs/servers/monitoring/plugins/esxi.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, python3Packages }:
+{ lib, fetchFromGitHub, python3Packages }:
 
 let
   bName = "check_esxi_hardware";
diff --git a/pkgs/servers/monitoring/prometheus/alertmanager.nix b/pkgs/servers/monitoring/prometheus/alertmanager.nix
index 19b98124e8e..bc3cf7539ec 100644
--- a/pkgs/servers/monitoring/prometheus/alertmanager.nix
+++ b/pkgs/servers/monitoring/prometheus/alertmanager.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, go, buildGoPackage, fetchFromGitHub, installShellFiles }:
+{ lib, go, buildGoPackage, fetchFromGitHub, installShellFiles }:
 
 buildGoPackage rec {
   pname = "alertmanager";
diff --git a/pkgs/servers/monitoring/prometheus/apcupsd-exporter.nix b/pkgs/servers/monitoring/prometheus/apcupsd-exporter.nix
index 648bb59b0d2..64105c9c58f 100644
--- a/pkgs/servers/monitoring/prometheus/apcupsd-exporter.nix
+++ b/pkgs/servers/monitoring/prometheus/apcupsd-exporter.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub, nixosTests }:
+{ lib, buildGoModule, fetchFromGitHub, nixosTests }:
 
 buildGoModule rec {
   pname = "apcupsd-exporter";
diff --git a/pkgs/servers/monitoring/prometheus/aws-s3-exporter.nix b/pkgs/servers/monitoring/prometheus/aws-s3-exporter.nix
index 2548e196837..af58a6ebe94 100644
--- a/pkgs/servers/monitoring/prometheus/aws-s3-exporter.nix
+++ b/pkgs/servers/monitoring/prometheus/aws-s3-exporter.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "aws-s3-exporter";
diff --git a/pkgs/servers/monitoring/prometheus/bind-exporter.nix b/pkgs/servers/monitoring/prometheus/bind-exporter.nix
index 1a86a0e38d9..5cfdf615830 100644
--- a/pkgs/servers/monitoring/prometheus/bind-exporter.nix
+++ b/pkgs/servers/monitoring/prometheus/bind-exporter.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub, nixosTests }:
+{ lib, buildGoPackage, fetchFromGitHub, nixosTests }:
 
 buildGoPackage rec {
   pname = "bind_exporter";
diff --git a/pkgs/servers/monitoring/prometheus/bird-exporter.nix b/pkgs/servers/monitoring/prometheus/bird-exporter.nix
index 5670233b054..3cb04304e26 100644
--- a/pkgs/servers/monitoring/prometheus/bird-exporter.nix
+++ b/pkgs/servers/monitoring/prometheus/bird-exporter.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub, nixosTests }:
+{ lib, buildGoModule, fetchFromGitHub, nixosTests }:
 
 buildGoModule rec {
   pname = "bird-exporter";
diff --git a/pkgs/servers/monitoring/prometheus/blackbox-exporter.nix b/pkgs/servers/monitoring/prometheus/blackbox-exporter.nix
index 3140056a269..88ef3f02602 100644
--- a/pkgs/servers/monitoring/prometheus/blackbox-exporter.nix
+++ b/pkgs/servers/monitoring/prometheus/blackbox-exporter.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub, nixosTests }:
+{ lib, buildGoPackage, fetchFromGitHub, nixosTests }:
 
 buildGoPackage rec {
   pname = "blackbox_exporter";
diff --git a/pkgs/servers/monitoring/prometheus/collectd-exporter.nix b/pkgs/servers/monitoring/prometheus/collectd-exporter.nix
index f86c3a42773..b3b61567d48 100644
--- a/pkgs/servers/monitoring/prometheus/collectd-exporter.nix
+++ b/pkgs/servers/monitoring/prometheus/collectd-exporter.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub, nixosTests }:
+{ lib, buildGoPackage, fetchFromGitHub, nixosTests }:
 
 buildGoPackage rec {
   pname = "collectd-exporter";
diff --git a/pkgs/servers/monitoring/prometheus/consul-exporter.nix b/pkgs/servers/monitoring/prometheus/consul-exporter.nix
index ab4b67402d3..c3cc7eff90a 100644
--- a/pkgs/servers/monitoring/prometheus/consul-exporter.nix
+++ b/pkgs/servers/monitoring/prometheus/consul-exporter.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "consul_exporter";
diff --git a/pkgs/servers/monitoring/prometheus/dnsmasq-exporter.nix b/pkgs/servers/monitoring/prometheus/dnsmasq-exporter.nix
index e0141718696..875db1777fb 100644
--- a/pkgs/servers/monitoring/prometheus/dnsmasq-exporter.nix
+++ b/pkgs/servers/monitoring/prometheus/dnsmasq-exporter.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub, nixosTests }:
+{ lib, buildGoModule, fetchFromGitHub, nixosTests }:
 
 buildGoModule rec {
   pname = "dnsmasq_exporter";
diff --git a/pkgs/servers/monitoring/prometheus/dovecot-exporter.nix b/pkgs/servers/monitoring/prometheus/dovecot-exporter.nix
index c0d96b08bb6..ff7156360a9 100644
--- a/pkgs/servers/monitoring/prometheus/dovecot-exporter.nix
+++ b/pkgs/servers/monitoring/prometheus/dovecot-exporter.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub, nixosTests }:
+{ lib, buildGoPackage, fetchFromGitHub, nixosTests }:
 
 buildGoPackage rec {
   pname = "dovecot_exporter";
diff --git a/pkgs/servers/monitoring/prometheus/fritzbox-exporter.nix b/pkgs/servers/monitoring/prometheus/fritzbox-exporter.nix
index bc9058e36d9..cefa4579069 100644
--- a/pkgs/servers/monitoring/prometheus/fritzbox-exporter.nix
+++ b/pkgs/servers/monitoring/prometheus/fritzbox-exporter.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub, nixosTests }:
+{ lib, buildGoPackage, fetchFromGitHub, nixosTests }:
 
 buildGoPackage rec {
   pname = "fritzbox-exporter";
diff --git a/pkgs/servers/monitoring/prometheus/gitlab-ci-pipelines-exporter.nix b/pkgs/servers/monitoring/prometheus/gitlab-ci-pipelines-exporter.nix
index 718c8f2fcb1..18055f9b06a 100644
--- a/pkgs/servers/monitoring/prometheus/gitlab-ci-pipelines-exporter.nix
+++ b/pkgs/servers/monitoring/prometheus/gitlab-ci-pipelines-exporter.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "gitlab-ci-pipelines-exporter";
diff --git a/pkgs/servers/monitoring/prometheus/haproxy-exporter.nix b/pkgs/servers/monitoring/prometheus/haproxy-exporter.nix
index e12c76e09f0..6a42297d502 100644
--- a/pkgs/servers/monitoring/prometheus/haproxy-exporter.nix
+++ b/pkgs/servers/monitoring/prometheus/haproxy-exporter.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "haproxy_exporter";
diff --git a/pkgs/servers/monitoring/prometheus/keylight-exporter.nix b/pkgs/servers/monitoring/prometheus/keylight-exporter.nix
index e7ecffee992..a551e55b216 100644
--- a/pkgs/servers/monitoring/prometheus/keylight-exporter.nix
+++ b/pkgs/servers/monitoring/prometheus/keylight-exporter.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub, nixosTests }:
+{ lib, buildGoModule, fetchFromGitHub, nixosTests }:
 
 buildGoModule rec {
   pname = "keylight-exporter";
diff --git a/pkgs/servers/monitoring/prometheus/lnd-exporter.nix b/pkgs/servers/monitoring/prometheus/lnd-exporter.nix
index 1f9c38922eb..34a9511d0b5 100644
--- a/pkgs/servers/monitoring/prometheus/lnd-exporter.nix
+++ b/pkgs/servers/monitoring/prometheus/lnd-exporter.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub, nixosTests }:
+{ lib, buildGoModule, fetchFromGitHub, nixosTests }:
 
 buildGoModule rec {
   pname = "lndmon";
diff --git a/pkgs/servers/monitoring/prometheus/mail-exporter.nix b/pkgs/servers/monitoring/prometheus/mail-exporter.nix
index daad5dc81cd..2d995ba5293 100644
--- a/pkgs/servers/monitoring/prometheus/mail-exporter.nix
+++ b/pkgs/servers/monitoring/prometheus/mail-exporter.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub, installShellFiles, nixosTests }:
+{ lib, buildGoModule, fetchFromGitHub, installShellFiles, nixosTests }:
 
 buildGoModule {
   pname = "mailexporter";
diff --git a/pkgs/servers/monitoring/prometheus/mesos-exporter.nix b/pkgs/servers/monitoring/prometheus/mesos-exporter.nix
index 0fb7ee4fce3..0fa2bced125 100644
--- a/pkgs/servers/monitoring/prometheus/mesos-exporter.nix
+++ b/pkgs/servers/monitoring/prometheus/mesos-exporter.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "mesos_exporter";
diff --git a/pkgs/servers/monitoring/prometheus/mikrotik-exporter.nix b/pkgs/servers/monitoring/prometheus/mikrotik-exporter.nix
index 5044db4b1c1..37f9b0c4e06 100644
--- a/pkgs/servers/monitoring/prometheus/mikrotik-exporter.nix
+++ b/pkgs/servers/monitoring/prometheus/mikrotik-exporter.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub, nixosTests }:
+{ lib, buildGoModule, fetchFromGitHub, nixosTests }:
 
 buildGoModule rec {
   pname = "mikrotik-exporter-unstable";
diff --git a/pkgs/servers/monitoring/prometheus/minio-exporter/default.nix b/pkgs/servers/monitoring/prometheus/minio-exporter/default.nix
index 78642821b94..93e9bca3283 100644
--- a/pkgs/servers/monitoring/prometheus/minio-exporter/default.nix
+++ b/pkgs/servers/monitoring/prometheus/minio-exporter/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub, fetchpatch }:
+{ lib, buildGoPackage, fetchFromGitHub, fetchpatch }:
 
 buildGoPackage rec {
   pname = "minio-exporter";
diff --git a/pkgs/servers/monitoring/prometheus/modemmanager-exporter.nix b/pkgs/servers/monitoring/prometheus/modemmanager-exporter.nix
index c23d44dca38..e6178dd52a3 100644
--- a/pkgs/servers/monitoring/prometheus/modemmanager-exporter.nix
+++ b/pkgs/servers/monitoring/prometheus/modemmanager-exporter.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub, nixosTests }:
+{ lib, buildGoModule, fetchFromGitHub, nixosTests }:
 
 buildGoModule rec {
   pname = "modemmanager-exporter";
diff --git a/pkgs/servers/monitoring/prometheus/mysqld-exporter.nix b/pkgs/servers/monitoring/prometheus/mysqld-exporter.nix
index ec181d2e110..ff32764fcde 100644
--- a/pkgs/servers/monitoring/prometheus/mysqld-exporter.nix
+++ b/pkgs/servers/monitoring/prometheus/mysqld-exporter.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "mysqld_exporter";
diff --git a/pkgs/servers/monitoring/prometheus/nginx-exporter.nix b/pkgs/servers/monitoring/prometheus/nginx-exporter.nix
index 259b4f752d3..ee5bafbc7c9 100644
--- a/pkgs/servers/monitoring/prometheus/nginx-exporter.nix
+++ b/pkgs/servers/monitoring/prometheus/nginx-exporter.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub, nixosTests }:
+{ lib, buildGoPackage, fetchFromGitHub, nixosTests }:
 
 buildGoPackage rec {
   pname = "nginx_exporter";
diff --git a/pkgs/servers/monitoring/prometheus/nginxlog-exporter.nix b/pkgs/servers/monitoring/prometheus/nginxlog-exporter.nix
index b15a54c6529..fad49d27575 100644
--- a/pkgs/servers/monitoring/prometheus/nginxlog-exporter.nix
+++ b/pkgs/servers/monitoring/prometheus/nginxlog-exporter.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub, nixosTests }:
+{ lib, buildGoModule, fetchFromGitHub, nixosTests }:
 
 buildGoModule rec {
   pname = "nginxlog_exporter";
diff --git a/pkgs/servers/monitoring/prometheus/node-exporter.nix b/pkgs/servers/monitoring/prometheus/node-exporter.nix
index e2b601f56c1..42ccb91017f 100644
--- a/pkgs/servers/monitoring/prometheus/node-exporter.nix
+++ b/pkgs/servers/monitoring/prometheus/node-exporter.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub, nixosTests }:
+{ lib, buildGoPackage, fetchFromGitHub, nixosTests }:
 
 buildGoPackage rec {
   pname = "node_exporter";
diff --git a/pkgs/servers/monitoring/prometheus/openvpn-exporter.nix b/pkgs/servers/monitoring/prometheus/openvpn-exporter.nix
index 8e3daa931ee..021905ba9e0 100644
--- a/pkgs/servers/monitoring/prometheus/openvpn-exporter.nix
+++ b/pkgs/servers/monitoring/prometheus/openvpn-exporter.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "openvpn_exporter-unstable";
diff --git a/pkgs/servers/monitoring/prometheus/postfix-exporter.nix b/pkgs/servers/monitoring/prometheus/postfix-exporter.nix
index e3f8b2d44d4..a24edd2fbb0 100644
--- a/pkgs/servers/monitoring/prometheus/postfix-exporter.nix
+++ b/pkgs/servers/monitoring/prometheus/postfix-exporter.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, buildGoPackage, fetchFromGitHub, makeWrapper, nixosTests
+{ lib, buildGoPackage, fetchFromGitHub, makeWrapper, nixosTests
 , systemd, withSystemdSupport ? true }:
 
 with lib;
diff --git a/pkgs/servers/monitoring/prometheus/process-exporter.nix b/pkgs/servers/monitoring/prometheus/process-exporter.nix
index 5a3c232ac85..a147a3c2905 100644
--- a/pkgs/servers/monitoring/prometheus/process-exporter.nix
+++ b/pkgs/servers/monitoring/prometheus/process-exporter.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "process-exporter";
diff --git a/pkgs/servers/monitoring/prometheus/prom2json.nix b/pkgs/servers/monitoring/prometheus/prom2json.nix
index b333faf0bbd..a370bf1f248 100644
--- a/pkgs/servers/monitoring/prometheus/prom2json.nix
+++ b/pkgs/servers/monitoring/prometheus/prom2json.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "prom2json";
diff --git a/pkgs/servers/monitoring/prometheus/promscale.nix b/pkgs/servers/monitoring/prometheus/promscale.nix
index f4a9070fd84..a4ba3cee620 100644
--- a/pkgs/servers/monitoring/prometheus/promscale.nix
+++ b/pkgs/servers/monitoring/prometheus/promscale.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildGoModule
 , fetchFromGitHub
 }:
diff --git a/pkgs/servers/monitoring/prometheus/pushgateway.nix b/pkgs/servers/monitoring/prometheus/pushgateway.nix
index 0d47211005f..aca2836e1a7 100644
--- a/pkgs/servers/monitoring/prometheus/pushgateway.nix
+++ b/pkgs/servers/monitoring/prometheus/pushgateway.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, go, buildGoPackage, fetchFromGitHub }:
+{ lib, go, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "pushgateway";
diff --git a/pkgs/servers/monitoring/prometheus/rabbitmq-exporter.nix b/pkgs/servers/monitoring/prometheus/rabbitmq-exporter.nix
index d9c08f8718d..b7832395f62 100644
--- a/pkgs/servers/monitoring/prometheus/rabbitmq-exporter.nix
+++ b/pkgs/servers/monitoring/prometheus/rabbitmq-exporter.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "rabbitmq_exporter";
diff --git a/pkgs/servers/monitoring/prometheus/redis-exporter.nix b/pkgs/servers/monitoring/prometheus/redis-exporter.nix
index 945f403041c..34c058d5d6c 100644
--- a/pkgs/servers/monitoring/prometheus/redis-exporter.nix
+++ b/pkgs/servers/monitoring/prometheus/redis-exporter.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub, nixosTests }:
+{ lib, buildGoPackage, fetchFromGitHub, nixosTests }:
 
 buildGoPackage rec {
   pname = "redis_exporter";
diff --git a/pkgs/servers/monitoring/prometheus/snmp-exporter.nix b/pkgs/servers/monitoring/prometheus/snmp-exporter.nix
index a71b03a2b41..ece22e496d1 100644
--- a/pkgs/servers/monitoring/prometheus/snmp-exporter.nix
+++ b/pkgs/servers/monitoring/prometheus/snmp-exporter.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub, net-snmp, nixosTests }:
+{ lib, buildGoPackage, fetchFromGitHub, net-snmp, nixosTests }:
 
 buildGoPackage rec {
   pname = "snmp_exporter";
diff --git a/pkgs/servers/monitoring/prometheus/sql-exporter.nix b/pkgs/servers/monitoring/prometheus/sql-exporter.nix
index 2784dae63af..553613a9c7e 100644
--- a/pkgs/servers/monitoring/prometheus/sql-exporter.nix
+++ b/pkgs/servers/monitoring/prometheus/sql-exporter.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub, nixosTests }:
+{ lib, buildGoModule, fetchFromGitHub, nixosTests }:
 
 buildGoModule rec {
   pname = "sql_exporter";
diff --git a/pkgs/servers/monitoring/prometheus/statsd-exporter.nix b/pkgs/servers/monitoring/prometheus/statsd-exporter.nix
index a2b0f73904b..31bd583280c 100644
--- a/pkgs/servers/monitoring/prometheus/statsd-exporter.nix
+++ b/pkgs/servers/monitoring/prometheus/statsd-exporter.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "statsd_exporter";
diff --git a/pkgs/servers/monitoring/prometheus/surfboard-exporter.nix b/pkgs/servers/monitoring/prometheus/surfboard-exporter.nix
index 50915bf65f8..39e475df197 100644
--- a/pkgs/servers/monitoring/prometheus/surfboard-exporter.nix
+++ b/pkgs/servers/monitoring/prometheus/surfboard-exporter.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub, nixosTests }:
+{ lib, buildGoPackage, fetchFromGitHub, nixosTests }:
 
 buildGoPackage rec {
   pname = "surfboard_exporter";
diff --git a/pkgs/servers/monitoring/prometheus/unifi-exporter/default.nix b/pkgs/servers/monitoring/prometheus/unifi-exporter/default.nix
index 669cf8ffaea..b9971ab7228 100644
--- a/pkgs/servers/monitoring/prometheus/unifi-exporter/default.nix
+++ b/pkgs/servers/monitoring/prometheus/unifi-exporter/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "unifi-exporter";
diff --git a/pkgs/servers/monitoring/thanos/default.nix b/pkgs/servers/monitoring/thanos/default.nix
index 9955b4a8333..755dc151775 100644
--- a/pkgs/servers/monitoring/thanos/default.nix
+++ b/pkgs/servers/monitoring/thanos/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 buildGoModule rec {
   pname = "thanos";
   version = "0.17.2";
diff --git a/pkgs/servers/monitoring/unifi-poller/default.nix b/pkgs/servers/monitoring/unifi-poller/default.nix
index 0343384a679..8297503b675 100644
--- a/pkgs/servers/monitoring/unifi-poller/default.nix
+++ b/pkgs/servers/monitoring/unifi-poller/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "unifi-poller";
diff --git a/pkgs/servers/nextcloud/news-updater.nix b/pkgs/servers/nextcloud/news-updater.nix
index f4dc2d33d1b..19147be3f5d 100644
--- a/pkgs/servers/nextcloud/news-updater.nix
+++ b/pkgs/servers/nextcloud/news-updater.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, python3Packages, php }:
+{ lib, fetchurl, python3Packages, php }:
 
 python3Packages.buildPythonApplication rec {
   name = "nextcloud-news-updater-${version}";
diff --git a/pkgs/servers/nginx-sso/default.nix b/pkgs/servers/nginx-sso/default.nix
index 0029d9ad55e..572f4d94e72 100644
--- a/pkgs/servers/nginx-sso/default.nix
+++ b/pkgs/servers/nginx-sso/default.nix
@@ -1,4 +1,4 @@
-{ buildGoPackage, fetchFromGitHub, lib, stdenv, nixosTests }:
+{ buildGoPackage, fetchFromGitHub, lib, nixosTests }:
 
 buildGoPackage rec {
   pname = "nginx-sso";
diff --git a/pkgs/servers/nosql/mongodb/v3_4.nix b/pkgs/servers/nosql/mongodb/v3_4.nix
index 2a33b9744a2..666a92004b4 100644
--- a/pkgs/servers/nosql/mongodb/v3_4.nix
+++ b/pkgs/servers/nosql/mongodb/v3_4.nix
@@ -1,4 +1,4 @@
-{ stdenv, callPackage, lib, sasl, boost, Security, CoreFoundation, cctools }:
+{ callPackage, lib, sasl, boost, Security, CoreFoundation, cctools }:
 
 let
   buildMongoDB = callPackage ./mongodb.nix {
diff --git a/pkgs/servers/openxpki/default.nix b/pkgs/servers/openxpki/default.nix
index 511ea217328..bdf12a1f923 100644
--- a/pkgs/servers/openxpki/default.nix
+++ b/pkgs/servers/openxpki/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchgit, perl, openssl, perlPackages, gettext, python3Packages
+{ lib, fetchgit, perl, openssl, perlPackages, gettext, python3Packages
 # TODO: Remove extra dependencies once it is clear that they are NOT needed somewhere.
 , extraDependencies1 ? false, extraDependencies2 ? false, extraDependencies3 ? false }:
 
diff --git a/pkgs/servers/radicale/1.x.nix b/pkgs/servers/radicale/1.x.nix
index 3bfab658af6..fafeda88975 100644
--- a/pkgs/servers/radicale/1.x.nix
+++ b/pkgs/servers/radicale/1.x.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, pythonPackages }:
+{ lib, fetchurl, pythonPackages }:
 
 pythonPackages.buildPythonApplication rec {
   pname = "radicale";
diff --git a/pkgs/servers/radicale/2.x.nix b/pkgs/servers/radicale/2.x.nix
index 918dad537a5..b0902feeead 100644
--- a/pkgs/servers/radicale/2.x.nix
+++ b/pkgs/servers/radicale/2.x.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, python3 }:
+{ lib, fetchFromGitHub, python3 }:
 
 python3.pkgs.buildPythonApplication rec {
   pname = "Radicale";
diff --git a/pkgs/servers/routinator/default.nix b/pkgs/servers/routinator/default.nix
index e62ad975380..4a19932f23e 100644
--- a/pkgs/servers/routinator/default.nix
+++ b/pkgs/servers/routinator/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, rustPlatform }:
+{ lib, fetchFromGitHub, rustPlatform }:
 
 rustPlatform.buildRustPackage rec {
   pname = "routinator";
diff --git a/pkgs/servers/rtsp-simple-server/default.nix b/pkgs/servers/rtsp-simple-server/default.nix
index d3ec7dc75ee..cfc35e8528f 100644
--- a/pkgs/servers/rtsp-simple-server/default.nix
+++ b/pkgs/servers/rtsp-simple-server/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , fetchFromGitHub
 , buildGoModule
 }:
diff --git a/pkgs/servers/scylladb/default.nix b/pkgs/servers/scylladb/default.nix
index ecc79acfbe7..2ae3d9f486f 100644
--- a/pkgs/servers/scylladb/default.nix
+++ b/pkgs/servers/scylladb/default.nix
@@ -1,5 +1,5 @@
 {
-  lib, stdenv,
+  lib,
   fetchgit,
   python3Packages,
   pkg-config,
diff --git a/pkgs/servers/serf/default.nix b/pkgs/servers/serf/default.nix
index 04cd93c5306..8964796862c 100644
--- a/pkgs/servers/serf/default.nix
+++ b/pkgs/servers/serf/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "serf";
diff --git a/pkgs/servers/sickbeard/sickrage.nix b/pkgs/servers/sickbeard/sickrage.nix
index 7bd971e86e7..43ba82caf76 100644
--- a/pkgs/servers/sickbeard/sickrage.nix
+++ b/pkgs/servers/sickbeard/sickrage.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, python2, makeWrapper }:
+{ lib, fetchFromGitHub, python2, makeWrapper }:
 
 python2.pkgs.buildPythonApplication rec {
   pname = "sickrage";
diff --git a/pkgs/servers/simplehttp2server/default.nix b/pkgs/servers/simplehttp2server/default.nix
index bc56053515b..d673a201646 100644
--- a/pkgs/servers/simplehttp2server/default.nix
+++ b/pkgs/servers/simplehttp2server/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "simplehttp2server";
diff --git a/pkgs/servers/skydns/default.nix b/pkgs/servers/skydns/default.nix
index 587c5d4bda2..e6f35124a6f 100644
--- a/pkgs/servers/skydns/default.nix
+++ b/pkgs/servers/skydns/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "skydns";
diff --git a/pkgs/servers/slimserver/default.nix b/pkgs/servers/slimserver/default.nix
index 5e1e8544818..3e28f501049 100644
--- a/pkgs/servers/slimserver/default.nix
+++ b/pkgs/servers/slimserver/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, makeWrapper
+{ lib, fetchurl, makeWrapper
 , perlPackages, flac, faad2, sox, lame, monkeysAudio, wavpack }:
 
 perlPackages.buildPerlPackage rec {
diff --git a/pkgs/servers/sql/dolt/default.nix b/pkgs/servers/sql/dolt/default.nix
index b0dc7a22757..75d341e601e 100644
--- a/pkgs/servers/sql/dolt/default.nix
+++ b/pkgs/servers/sql/dolt/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchFromGitHub, lib, buildGoModule }:
+{ fetchFromGitHub, lib, buildGoModule }:
 
 buildGoModule rec {
     pname = "dolt";
diff --git a/pkgs/servers/tarssh/default.nix b/pkgs/servers/tarssh/default.nix
index bb353dda928..9240b9c51a2 100644
--- a/pkgs/servers/tarssh/default.nix
+++ b/pkgs/servers/tarssh/default.nix
@@ -1,4 +1,4 @@
-{ fetchFromGitHub, rustPlatform, lib, stdenv }:
+{ fetchFromGitHub, rustPlatform, lib }:
 
 with rustPlatform;
 
diff --git a/pkgs/servers/tegola/default.nix b/pkgs/servers/tegola/default.nix
index c18bf17a7c7..f2161d5d47e 100644
--- a/pkgs/servers/tegola/default.nix
+++ b/pkgs/servers/tegola/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "tegola";
diff --git a/pkgs/servers/teleport/default.nix b/pkgs/servers/teleport/default.nix
index f89c8f96fcf..0b55b82d39e 100644
--- a/pkgs/servers/teleport/default.nix
+++ b/pkgs/servers/teleport/default.nix
@@ -1,5 +1,5 @@
 # This file was generated by https://github.com/kamilchm/go2nix v2.0-dev
-{ lib, stdenv, buildGoPackage, zip, fetchFromGitHub }:
+{ lib, buildGoPackage, zip, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "teleport";
diff --git a/pkgs/servers/traefik/default.nix b/pkgs/servers/traefik/default.nix
index 4ef454d6b56..340bad6bdc8 100644
--- a/pkgs/servers/traefik/default.nix
+++ b/pkgs/servers/traefik/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchzip, buildGoModule, go-bindata, nixosTests }:
+{ lib, fetchzip, buildGoModule, go-bindata, nixosTests }:
 
 buildGoModule rec {
   pname = "traefik";
diff --git a/pkgs/servers/trezord/default.nix b/pkgs/servers/trezord/default.nix
index 03ff9f32fa5..cc0fb0d7421 100644
--- a/pkgs/servers/trezord/default.nix
+++ b/pkgs/servers/trezord/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildGoModule
 , fetchFromGitHub
 , trezor-udev-rules
diff --git a/pkgs/servers/trickster/trickster.nix b/pkgs/servers/trickster/trickster.nix
index b99375dbb3d..5cf08ee6c3c 100644
--- a/pkgs/servers/trickster/trickster.nix
+++ b/pkgs/servers/trickster/trickster.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "trickster";
diff --git a/pkgs/servers/tt-rss/plugin-ff-instagram/default.nix b/pkgs/servers/tt-rss/plugin-ff-instagram/default.nix
index 375726a4692..1accac5bf6f 100644
--- a/pkgs/servers/tt-rss/plugin-ff-instagram/default.nix
+++ b/pkgs/servers/tt-rss/plugin-ff-instagram/default.nix
@@ -1,4 +1,6 @@
-{ lib, stdenv, fetchFromGitHub, ... }: stdenv.mkDerivation {
+{ lib, stdenv, fetchFromGitHub, ... }:
+
+stdenv.mkDerivation {
   pname = "tt-rss-plugin-ff-instagram";
   version = "git-2019-01-10"; # No release, see https://github.com/wltb/ff_instagram/issues/6
 
diff --git a/pkgs/servers/tt-rss/plugin-tumblr-gdpr/default.nix b/pkgs/servers/tt-rss/plugin-tumblr-gdpr/default.nix
index 987a6d8aaa6..7df8b717593 100644
--- a/pkgs/servers/tt-rss/plugin-tumblr-gdpr/default.nix
+++ b/pkgs/servers/tt-rss/plugin-tumblr-gdpr/default.nix
@@ -1,4 +1,6 @@
-{ lib, stdenv, fetchFromGitHub, ... }: stdenv.mkDerivation rec {
+{ lib, stdenv, fetchFromGitHub, ... }:
+
+stdenv.mkDerivation rec {
   pname = "tt-rss-plugin-tumblr-gdpr";
   version = "2.1";
 
diff --git a/pkgs/servers/tt-rss/theme-feedly/default.nix b/pkgs/servers/tt-rss/theme-feedly/default.nix
index 41f47ca4a4e..f6882611a25 100644
--- a/pkgs/servers/tt-rss/theme-feedly/default.nix
+++ b/pkgs/servers/tt-rss/theme-feedly/default.nix
@@ -1,4 +1,6 @@
-{ lib, stdenv, fetchFromGitHub }: stdenv.mkDerivation rec {
+{ lib, stdenv, fetchFromGitHub }:
+
+stdenv.mkDerivation rec {
   pname = "tt-rss-theme-feedly";
   version = "2.5.0";
 
diff --git a/pkgs/servers/udpt/default.nix b/pkgs/servers/udpt/default.nix
index acdfb95272a..b681727c08f 100644
--- a/pkgs/servers/udpt/default.nix
+++ b/pkgs/servers/udpt/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, rustPlatform, fetchFromGitHub }:
+{ lib, rustPlatform, fetchFromGitHub }:
 
 rustPlatform.buildRustPackage rec {
   pname = "udpt";
diff --git a/pkgs/servers/unpfs/default.nix b/pkgs/servers/unpfs/default.nix
index 818e92f0596..07342c3edbe 100644
--- a/pkgs/servers/unpfs/default.nix
+++ b/pkgs/servers/unpfs/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, rustPlatform }:
+{ lib, fetchFromGitHub, rustPlatform }:
 
 rustPlatform.buildRustPackage rec {
   pname = "unpfs";
diff --git a/pkgs/servers/web-apps/morty/default.nix b/pkgs/servers/web-apps/morty/default.nix
index 6b17476623b..04f1e14d5cc 100644
--- a/pkgs/servers/web-apps/morty/default.nix
+++ b/pkgs/servers/web-apps/morty/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchgit }:
+{ lib, buildGoPackage, fetchgit }:
 
 buildGoPackage rec {
   pname = "morty";
diff --git a/pkgs/servers/web-apps/shiori/default.nix b/pkgs/servers/web-apps/shiori/default.nix
index 7100c70c0ed..b39d7a00ced 100644
--- a/pkgs/servers/web-apps/shiori/default.nix
+++ b/pkgs/servers/web-apps/shiori/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "shiori";
diff --git a/pkgs/servers/webmetro/default.nix b/pkgs/servers/webmetro/default.nix
index 316e3a52497..6bda15a93e0 100644
--- a/pkgs/servers/webmetro/default.nix
+++ b/pkgs/servers/webmetro/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, rustPlatform }:
+{ lib, fetchFromGitHub, rustPlatform }:
 
 rustPlatform.buildRustPackage rec {
   pname = "webmetro";
diff --git a/pkgs/servers/x11/xorg/xwayland.nix b/pkgs/servers/x11/xorg/xwayland.nix
index 7fe0e5a9f97..e3d2698e830 100644
--- a/pkgs/servers/x11/xorg/xwayland.nix
+++ b/pkgs/servers/x11/xorg/xwayland.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, wayland, wayland-protocols, xorgserver, xkbcomp, xkeyboard_config
+{ lib, wayland, wayland-protocols, xorgserver, xkbcomp, xkeyboard_config
 , epoxy, libxslt, libunwind, makeWrapper, egl-wayland
 , defaultFontPath ? "" }:
 
diff --git a/pkgs/servers/xandikos/default.nix b/pkgs/servers/xandikos/default.nix
index b8eb29d87b2..5241139cfa3 100644
--- a/pkgs/servers/xandikos/default.nix
+++ b/pkgs/servers/xandikos/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , fetchFromGitHub
 , python3Packages
 , installShellFiles
diff --git a/pkgs/servers/zigbee2mqtt/default.nix b/pkgs/servers/zigbee2mqtt/default.nix
index 550e93fb5aa..85465fd7d14 100644
--- a/pkgs/servers/zigbee2mqtt/default.nix
+++ b/pkgs/servers/zigbee2mqtt/default.nix
@@ -1,4 +1,4 @@
-{ pkgs, stdenv, system, dataDir ? "/opt/zigbee2mqtt/data", nixosTests }:
+{ pkgs, system, dataDir ? "/opt/zigbee2mqtt/data", nixosTests }:
 let
   package = (import ./node.nix { inherit pkgs system; }).package;
 in
diff --git a/pkgs/shells/elvish/default.nix b/pkgs/shells/elvish/default.nix
index 938029e9af9..82a15edcb26 100644
--- a/pkgs/shells/elvish/default.nix
+++ b/pkgs/shells/elvish/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "elvish";
diff --git a/pkgs/shells/fish/babelfish.nix b/pkgs/shells/fish/babelfish.nix
index c23e0b1ca92..368c88aa1bb 100644
--- a/pkgs/shells/fish/babelfish.nix
+++ b/pkgs/shells/fish/babelfish.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 buildGoModule rec {
   pname = "babelfish";
   version = "1.0.1";
diff --git a/pkgs/shells/oh/default.nix b/pkgs/shells/oh/default.nix
index 3ea41d7f472..33e71358b4d 100644
--- a/pkgs/shells/oh/default.nix
+++ b/pkgs/shells/oh/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, buildGoPackage, fetchgit, lib }:
+{ buildGoPackage, fetchgit, lib }:
 
 buildGoPackage rec {
   pname = "oh";
diff --git a/pkgs/shells/pash/default.nix b/pkgs/shells/pash/default.nix
index 8b2ac362959..c7c6e4e5a7d 100644
--- a/pkgs/shells/pash/default.nix
+++ b/pkgs/shells/pash/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, buildDotnetPackage }:
+{ lib, fetchFromGitHub, buildDotnetPackage }:
 
 buildDotnetPackage {
   baseName = "pash";
diff --git a/pkgs/shells/zsh/zsh-git-prompt/default.nix b/pkgs/shells/zsh/zsh-git-prompt/default.nix
index c0c56570b46..7fb2d786193 100644
--- a/pkgs/shells/zsh/zsh-git-prompt/default.nix
+++ b/pkgs/shells/zsh/zsh-git-prompt/default.nix
@@ -32,7 +32,7 @@
 }:
 
 haskellPackages.callPackage
-  ({ mkDerivation, base, HUnit, parsec, process, QuickCheck, stdenv }:
+  ({ mkDerivation, base, HUnit, parsec, process, QuickCheck }:
    mkDerivation rec {
      pname = "zsh-git-prompt";
      version = "0.4z";  # While we await a real 0.5 release.
diff --git a/pkgs/test/haskell-shellFor/default.nix b/pkgs/test/haskell-shellFor/default.nix
index 05d09d6f39c..9d13e1112cc 100644
--- a/pkgs/test/haskell-shellFor/default.nix
+++ b/pkgs/test/haskell-shellFor/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, haskellPackages, cabal-install }:
+{ lib, haskellPackages, cabal-install }:
 
 (haskellPackages.shellFor {
   packages = p: [ p.database-id-class p.constraints ];
diff --git a/pkgs/test/install-shell-files/default.nix b/pkgs/test/install-shell-files/default.nix
index e9d32e4ccf6..aef5acc1de6 100644
--- a/pkgs/test/install-shell-files/default.nix
+++ b/pkgs/test/install-shell-files/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, runCommandLocal, recurseIntoAttrs, installShellFiles }:
+{ lib, runCommandLocal, recurseIntoAttrs, installShellFiles }:
 
 let
   runTest = name: env: buildCommand:
diff --git a/pkgs/tools/X11/arandr/default.nix b/pkgs/tools/X11/arandr/default.nix
index 00296bc54af..e6f4b5f6ff1 100644
--- a/pkgs/tools/X11/arandr/default.nix
+++ b/pkgs/tools/X11/arandr/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, python3Packages
+{ lib, fetchurl, python3Packages
 , gobject-introspection, gsettings-desktop-schemas, gtk3
 , wrapGAppsHook, xrandr
 }:
diff --git a/pkgs/tools/X11/go-sct/default.nix b/pkgs/tools/X11/go-sct/default.nix
index 2d6965567b7..8744c493b71 100644
--- a/pkgs/tools/X11/go-sct/default.nix
+++ b/pkgs/tools/X11/go-sct/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, xorg, buildGoPackage, fetchFromGitHub }:
+{ lib, xorg, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "go-sct";
diff --git a/pkgs/tools/X11/grobi/default.nix b/pkgs/tools/X11/grobi/default.nix
index 1ebd8ccc4e4..3071ef31781 100644
--- a/pkgs/tools/X11/grobi/default.nix
+++ b/pkgs/tools/X11/grobi/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, buildGoModule, fetchpatch }:
+{ lib, fetchFromGitHub, buildGoModule, fetchpatch }:
 
 buildGoModule rec {
   version = "0.6.0";
diff --git a/pkgs/tools/X11/wpgtk/default.nix b/pkgs/tools/X11/wpgtk/default.nix
index f2864ca2eb5..cf9bbd9bb98 100644
--- a/pkgs/tools/X11/wpgtk/default.nix
+++ b/pkgs/tools/X11/wpgtk/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python3Packages, fetchFromGitHub, libxslt,
+{ lib, python3Packages, fetchFromGitHub, libxslt,
   gobject-introspection, gtk3, wrapGAppsHook, gnome3 }:
 
 python3Packages.buildPythonApplication rec {
diff --git a/pkgs/tools/X11/xpra/default.nix b/pkgs/tools/X11/xpra/default.nix
index 0c1accd36fb..0dffdf7bbf7 100644
--- a/pkgs/tools/X11/xpra/default.nix
+++ b/pkgs/tools/X11/xpra/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, fetchurl, callPackage, substituteAll, python3, pkg-config, writeText
+{ lib, fetchurl, callPackage, substituteAll, python3, pkg-config, writeText
 , xorg, gtk3, glib, pango, cairo, gdk-pixbuf, atk
 , wrapGAppsHook, xorgserver, getopt, xauth, util-linux, which
 , ffmpeg, x264, libvpx, libwebp, x265
diff --git a/pkgs/tools/admin/afterburn/default.nix b/pkgs/tools/admin/afterburn/default.nix
index 0d3cd957324..8a42a011da9 100644
--- a/pkgs/tools/admin/afterburn/default.nix
+++ b/pkgs/tools/admin/afterburn/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, openssl, pkg-config, fetchFromGitHub, rustPlatform }:
+{ lib, openssl, pkg-config, fetchFromGitHub, rustPlatform }:
 
 rustPlatform.buildRustPackage rec {
   pname = "afterburn";
diff --git a/pkgs/tools/admin/aws-nuke/default.nix b/pkgs/tools/admin/aws-nuke/default.nix
index 32c006d7a5f..070a9b6430c 100644
--- a/pkgs/tools/admin/aws-nuke/default.nix
+++ b/pkgs/tools/admin/aws-nuke/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildGoModule
 , fetchFromGitHub
 }:
diff --git a/pkgs/tools/admin/aws-rotate-key/default.nix b/pkgs/tools/admin/aws-rotate-key/default.nix
index 4b26e3a7434..82b57739120 100644
--- a/pkgs/tools/admin/aws-rotate-key/default.nix
+++ b/pkgs/tools/admin/aws-rotate-key/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "aws-rotate-key";
diff --git a/pkgs/tools/admin/awslogs/default.nix b/pkgs/tools/admin/awslogs/default.nix
index f71422f77a2..3e2cf150557 100644
--- a/pkgs/tools/admin/awslogs/default.nix
+++ b/pkgs/tools/admin/awslogs/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, python3Packages }:
+{ lib, fetchFromGitHub, python3Packages }:
 
 python3Packages.buildPythonApplication rec {
   pname = "awslogs";
diff --git a/pkgs/tools/admin/berglas/default.nix b/pkgs/tools/admin/berglas/default.nix
index ca588db01a5..8a6bb559041 100644
--- a/pkgs/tools/admin/berglas/default.nix
+++ b/pkgs/tools/admin/berglas/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "berglas";
diff --git a/pkgs/tools/admin/certigo/default.nix b/pkgs/tools/admin/certigo/default.nix
index ff66e926d4b..422c6da82d2 100644
--- a/pkgs/tools/admin/certigo/default.nix
+++ b/pkgs/tools/admin/certigo/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "certigo";
diff --git a/pkgs/tools/admin/chkcrontab/default.nix b/pkgs/tools/admin/chkcrontab/default.nix
index 6404eb92a26..bbf8d7eaeb1 100644
--- a/pkgs/tools/admin/chkcrontab/default.nix
+++ b/pkgs/tools/admin/chkcrontab/default.nix
@@ -1,4 +1,4 @@
-{ python, lib, stdenv }:
+{ python, lib }:
 
 with python.pkgs;
 
diff --git a/pkgs/tools/admin/credhub-cli/default.nix b/pkgs/tools/admin/credhub-cli/default.nix
index 2a1ceb531a5..55af1679d7a 100644
--- a/pkgs/tools/admin/credhub-cli/default.nix
+++ b/pkgs/tools/admin/credhub-cli/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "credhub-cli";
diff --git a/pkgs/tools/admin/docker-credential-gcr/default.nix b/pkgs/tools/admin/docker-credential-gcr/default.nix
index 2ca0f2c4d08..7fb128caa19 100644
--- a/pkgs/tools/admin/docker-credential-gcr/default.nix
+++ b/pkgs/tools/admin/docker-credential-gcr/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "docker-credential-gcr";
diff --git a/pkgs/tools/admin/exoscale-cli/default.nix b/pkgs/tools/admin/exoscale-cli/default.nix
index 3fe3856d9c5..8913bed39d5 100644
--- a/pkgs/tools/admin/exoscale-cli/default.nix
+++ b/pkgs/tools/admin/exoscale-cli/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "exoscale-cli";
diff --git a/pkgs/tools/admin/iamy/default.nix b/pkgs/tools/admin/iamy/default.nix
index e7481e16948..dd35da451ad 100644
--- a/pkgs/tools/admin/iamy/default.nix
+++ b/pkgs/tools/admin/iamy/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "iamy";
diff --git a/pkgs/tools/admin/lxd/default.nix b/pkgs/tools/admin/lxd/default.nix
index aeff0d931f0..1c263a1969d 100644
--- a/pkgs/tools/admin/lxd/default.nix
+++ b/pkgs/tools/admin/lxd/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, hwdata, pkg-config, lxc, buildGoPackage, fetchurl
+{ lib, hwdata, pkg-config, lxc, buildGoPackage, fetchurl
 , makeWrapper, acl, rsync, gnutar, xz, btrfs-progs, gzip, dnsmasq
 , squashfsTools, iproute, iptables, ebtables, iptables-nftables-compat, libcap
 , libco-canonical, dqlite, raft-canonical, sqlite-replication, udev
diff --git a/pkgs/tools/admin/s3bro/default.nix b/pkgs/tools/admin/s3bro/default.nix
index bf807d14997..35cf7b11e64 100644
--- a/pkgs/tools/admin/s3bro/default.nix
+++ b/pkgs/tools/admin/s3bro/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python3Packages }:
+{ lib, python3Packages }:
 
 python3Packages.buildPythonPackage rec {
   pname = "s3bro";
diff --git a/pkgs/tools/admin/scaleway-cli/default.nix b/pkgs/tools/admin/scaleway-cli/default.nix
index 0aeccb755a1..2a8f0d1f114 100644
--- a/pkgs/tools/admin/scaleway-cli/default.nix
+++ b/pkgs/tools/admin/scaleway-cli/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, buildGoPackage }:
+{ lib, fetchFromGitHub, buildGoPackage }:
 
 buildGoPackage rec {
   pname = "scaleway-cli";
diff --git a/pkgs/tools/admin/sewer/default.nix b/pkgs/tools/admin/sewer/default.nix
index 42288bafe01..a6f511fe115 100644
--- a/pkgs/tools/admin/sewer/default.nix
+++ b/pkgs/tools/admin/sewer/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python3Packages }:
+{ lib, python3Packages }:
 
 python3Packages.buildPythonApplication rec {
   pname = "sewer";
diff --git a/pkgs/tools/admin/simp_le/default.nix b/pkgs/tools/admin/simp_le/default.nix
index fc064641943..5bfc00ac000 100644
--- a/pkgs/tools/admin/simp_le/default.nix
+++ b/pkgs/tools/admin/simp_le/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python3Packages, bash }:
+{ lib, python3Packages, bash }:
 
 python3Packages.buildPythonApplication rec {
   pname = "simp_le-client";
diff --git a/pkgs/tools/admin/ssh-import-id/default.nix b/pkgs/tools/admin/ssh-import-id/default.nix
index 6c8520648ec..b6ca3135f56 100644
--- a/pkgs/tools/admin/ssh-import-id/default.nix
+++ b/pkgs/tools/admin/ssh-import-id/default.nix
@@ -1,5 +1,5 @@
 { buildPythonPackage
-, lib, stdenv
+, lib
 , fetchgit
 , requests
 , makeWrapper
diff --git a/pkgs/tools/admin/ssmsh/default.nix b/pkgs/tools/admin/ssmsh/default.nix
index 6b0d0380901..8ed8b0b812b 100644
--- a/pkgs/tools/admin/ssmsh/default.nix
+++ b/pkgs/tools/admin/ssmsh/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "ssmsh";
diff --git a/pkgs/tools/admin/stripe-cli/default.nix b/pkgs/tools/admin/stripe-cli/default.nix
index c410bd81e89..309bf4803fb 100644
--- a/pkgs/tools/admin/stripe-cli/default.nix
+++ b/pkgs/tools/admin/stripe-cli/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "stripe-cli";
diff --git a/pkgs/tools/audio/beets/plugins/alternatives.nix b/pkgs/tools/audio/beets/plugins/alternatives.nix
index a64cc5ebcad..793611699ec 100644
--- a/pkgs/tools/audio/beets/plugins/alternatives.nix
+++ b/pkgs/tools/audio/beets/plugins/alternatives.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchFromGitHub, beets, pythonPackages }:
+{ fetchFromGitHub, beets, pythonPackages }:
 
 pythonPackages.buildPythonApplication rec {
   pname = "beets-alternatives";
diff --git a/pkgs/tools/audio/beets/plugins/check.nix b/pkgs/tools/audio/beets/plugins/check.nix
index 545e6d7cf2c..441dcfe579f 100644
--- a/pkgs/tools/audio/beets/plugins/check.nix
+++ b/pkgs/tools/audio/beets/plugins/check.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, beets, pythonPackages, flac, liboggz, mp3val }:
+{ lib, fetchFromGitHub, beets, pythonPackages, flac, liboggz, mp3val }:
 
 pythonPackages.buildPythonApplication rec {
   name = "beets-check";
diff --git a/pkgs/tools/audio/beets/plugins/copyartifacts.nix b/pkgs/tools/audio/beets/plugins/copyartifacts.nix
index b339bc34ad2..5af52066caa 100644
--- a/pkgs/tools/audio/beets/plugins/copyartifacts.nix
+++ b/pkgs/tools/audio/beets/plugins/copyartifacts.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchFromGitHub, beets, pythonPackages, glibcLocales }:
+{ fetchFromGitHub, beets, pythonPackages, glibcLocales }:
 
 pythonPackages.buildPythonApplication {
   name = "beets-copyartifacts";
diff --git a/pkgs/tools/audio/mididings/default.nix b/pkgs/tools/audio/mididings/default.nix
index eedfd2f3dbb..d5f78ada91c 100644
--- a/pkgs/tools/audio/mididings/default.nix
+++ b/pkgs/tools/audio/mididings/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, pythonPackages, fetchFromGitHub, pkg-config, glib, alsaLib, libjack2  }:
+{ lib, pythonPackages, fetchFromGitHub, pkg-config, glib, alsaLib, libjack2  }:
 
 pythonPackages.buildPythonApplication {
   version = "2015-11-17";
diff --git a/pkgs/tools/audio/mpd-mpris/default.nix b/pkgs/tools/audio/mpd-mpris/default.nix
index 801058e0496..af4000dfa44 100644
--- a/pkgs/tools/audio/mpd-mpris/default.nix
+++ b/pkgs/tools/audio/mpd-mpris/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "mpd-mpris";
diff --git a/pkgs/tools/audio/mpdris2/default.nix b/pkgs/tools/audio/mpdris2/default.nix
index 30b0d90f562..4cd3921fb55 100644
--- a/pkgs/tools/audio/mpdris2/default.nix
+++ b/pkgs/tools/audio/mpdris2/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , autoreconfHook
 , fetchFromGitHub
 , glib
diff --git a/pkgs/tools/audio/opl3bankeditor/default.nix b/pkgs/tools/audio/opl3bankeditor/default.nix
index c79204cffa2..48f553d960d 100644
--- a/pkgs/tools/audio/opl3bankeditor/default.nix
+++ b/pkgs/tools/audio/opl3bankeditor/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, mkDerivation, fetchFromGitHub, cmake, qttools, alsaLib }:
+{ lib, mkDerivation, fetchFromGitHub, cmake, qttools, alsaLib }:
 
 mkDerivation rec {
   version = "1.5.1";
diff --git a/pkgs/tools/audio/video2midi/default.nix b/pkgs/tools/audio/video2midi/default.nix
index 3ce76fb61fa..4eafd7f52e1 100644
--- a/pkgs/tools/audio/video2midi/default.nix
+++ b/pkgs/tools/audio/video2midi/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, pythonPackages, opencv3 }:
+{ lib, fetchFromGitHub, pythonPackages, opencv3 }:
 
 let
   opencv3_ = pythonPackages.toPythonModule (opencv3.override {
diff --git a/pkgs/tools/audio/volctl/default.nix b/pkgs/tools/audio/volctl/default.nix
index 06b6079bde2..d05257f1d08 100644
--- a/pkgs/tools/audio/volctl/default.nix
+++ b/pkgs/tools/audio/volctl/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python3Packages, fetchFromGitHub, wrapGAppsHook, gobject-introspection, libpulseaudio, glib, gtk3, pango, xorg }:
+{ lib, python3Packages, fetchFromGitHub, wrapGAppsHook, gobject-introspection, libpulseaudio, glib, gtk3, pango, xorg }:
 
 python3Packages.buildPythonApplication rec {
   pname = "volctl";
diff --git a/pkgs/tools/backup/bupstash/default.nix b/pkgs/tools/backup/bupstash/default.nix
index 76a3d674ecb..9ed70491fb3 100644
--- a/pkgs/tools/backup/bupstash/default.nix
+++ b/pkgs/tools/backup/bupstash/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, installShellFiles, rustPlatform, ronn, pkg-config, libsodium }:
+{ lib, fetchFromGitHub, installShellFiles, rustPlatform, ronn, pkg-config, libsodium }:
 rustPlatform.buildRustPackage rec {
   pname = "bupstash";
   version = "0.6.4";
diff --git a/pkgs/tools/backup/diskrsync/default.nix b/pkgs/tools/backup/diskrsync/default.nix
index d70efa1d224..3b5d901daf0 100644
--- a/pkgs/tools/backup/diskrsync/default.nix
+++ b/pkgs/tools/backup/diskrsync/default.nix
@@ -1,4 +1,4 @@
-{ buildGoPackage, fetchFromGitHub, lib, stdenv, openssh, makeWrapper }:
+{ buildGoPackage, fetchFromGitHub, lib, openssh, makeWrapper }:
 
 buildGoPackage rec {
   pname = "diskrsync";
diff --git a/pkgs/tools/backup/grab-site/default.nix b/pkgs/tools/backup/grab-site/default.nix
index 2ef3b5f5420..2f2f01356b4 100644
--- a/pkgs/tools/backup/grab-site/default.nix
+++ b/pkgs/tools/backup/grab-site/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python37, fetchFromGitHub }:
+{ lib, python37, fetchFromGitHub }:
 let
   python = python37.override {
     self = python;
diff --git a/pkgs/tools/backup/httrack/qt.nix b/pkgs/tools/backup/httrack/qt.nix
index 736dfdb557d..2a7c4ff5176 100644
--- a/pkgs/tools/backup/httrack/qt.nix
+++ b/pkgs/tools/backup/httrack/qt.nix
@@ -1,4 +1,4 @@
-{ mkDerivation, lib, stdenv, fetchurl, cmake, pkg-config, makeWrapper
+{ mkDerivation, lib, fetchurl, cmake, pkg-config, makeWrapper
 , httrack, qtbase, qtmultimedia }:
 
 mkDerivation rec {
diff --git a/pkgs/tools/backup/iceshelf/default.nix b/pkgs/tools/backup/iceshelf/default.nix
index eb5e883bdac..c066cb76695 100644
--- a/pkgs/tools/backup/iceshelf/default.nix
+++ b/pkgs/tools/backup/iceshelf/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, fetchFromGitHub, git, awscli, python3 }:
+{ lib, fetchFromGitHub, git, awscli, python3 }:
 
 python3.pkgs.buildPythonApplication rec {
   pname = "iceshelf";
diff --git a/pkgs/tools/backup/luckybackup/default.nix b/pkgs/tools/backup/luckybackup/default.nix
index 5a67bea41ea..a8f88e88b0e 100644
--- a/pkgs/tools/backup/luckybackup/default.nix
+++ b/pkgs/tools/backup/luckybackup/default.nix
@@ -1,4 +1,4 @@
-{ mkDerivation, lib, stdenv, fetchurl
+{ mkDerivation, lib, fetchurl
 , pkg-config, libtool, qmake
 , rsync, ssh
 }:
diff --git a/pkgs/tools/backup/rdiff-backup/default.nix b/pkgs/tools/backup/rdiff-backup/default.nix
index f55f163dafb..0d24e3df720 100644
--- a/pkgs/tools/backup/rdiff-backup/default.nix
+++ b/pkgs/tools/backup/rdiff-backup/default.nix
@@ -1,4 +1,4 @@
-{lib, stdenv, fetchurl, python2Packages, librsync, gnused }:
+{lib, fetchurl, python2Packages, librsync, gnused }:
 
 python2Packages.buildPythonApplication {
   name = "rdiff-backup-1.3.3";
diff --git a/pkgs/tools/backup/s3ql/default.nix b/pkgs/tools/backup/s3ql/default.nix
index 74b90236c4e..70394afb50e 100644
--- a/pkgs/tools/backup/s3ql/default.nix
+++ b/pkgs/tools/backup/s3ql/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, python3Packages, sqlite, which }:
+{ lib, fetchFromGitHub, python3Packages, sqlite, which }:
 
 python3Packages.buildPythonApplication rec {
   pname = "s3ql";
diff --git a/pkgs/tools/backup/ugarit-manifest-maker/default.nix b/pkgs/tools/backup/ugarit-manifest-maker/default.nix
index 99ddd62e6ae..8c37a7b72ac 100644
--- a/pkgs/tools/backup/ugarit-manifest-maker/default.nix
+++ b/pkgs/tools/backup/ugarit-manifest-maker/default.nix
@@ -1,4 +1,4 @@
-{ pkgs, lib, stdenv, eggDerivation, fetchegg }:
+{ pkgs, lib, eggDerivation, fetchegg }:
 let
   eggs = import ./eggs.nix { inherit eggDerivation fetchegg; };
 in with pkgs; eggDerivation rec {
diff --git a/pkgs/tools/backup/ugarit/default.nix b/pkgs/tools/backup/ugarit/default.nix
index 938c24f38ce..39c11cc0c91 100644
--- a/pkgs/tools/backup/ugarit/default.nix
+++ b/pkgs/tools/backup/ugarit/default.nix
@@ -1,4 +1,4 @@
-{ pkgs, lib, stdenv, eggDerivation, fetchegg }:
+{ pkgs, lib, eggDerivation, fetchegg }:
 let
   eggs = import ./eggs.nix { inherit eggDerivation fetchegg; };
 in with pkgs; eggDerivation rec {
diff --git a/pkgs/tools/backup/wal-e/default.nix b/pkgs/tools/backup/wal-e/default.nix
index 0ed2bf1bf8b..8e54b58e201 100644
--- a/pkgs/tools/backup/wal-e/default.nix
+++ b/pkgs/tools/backup/wal-e/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, python3Packages, lzop, postgresql, pv }:
+{ lib, fetchurl, python3Packages, lzop, postgresql, pv }:
 
 python3Packages.buildPythonApplication rec {
   pname = "wal-e";
diff --git a/pkgs/tools/backup/zfs-replicate/default.nix b/pkgs/tools/backup/zfs-replicate/default.nix
index 02e3c19f004..c167ad1fa01 100644
--- a/pkgs/tools/backup/zfs-replicate/default.nix
+++ b/pkgs/tools/backup/zfs-replicate/default.nix
@@ -1,5 +1,5 @@
 { buildPythonApplication, click, fetchPypi, hypothesis, mypy, pytest
-, pytestcov, pytestrunner, lib, stdenv, stringcase
+, pytestcov, pytestrunner, lib, stringcase
 }:
 
 buildPythonApplication rec {
diff --git a/pkgs/tools/cd-dvd/isolyzer/default.nix b/pkgs/tools/cd-dvd/isolyzer/default.nix
index 477fa337da8..c175eb45aa0 100644
--- a/pkgs/tools/cd-dvd/isolyzer/default.nix
+++ b/pkgs/tools/cd-dvd/isolyzer/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , python3
 , fetchFromGitHub
 }:
diff --git a/pkgs/tools/compression/dtrx/default.nix b/pkgs/tools/compression/dtrx/default.nix
index 0abea9b1285..91d59a4de0f 100644
--- a/pkgs/tools/compression/dtrx/default.nix
+++ b/pkgs/tools/compression/dtrx/default.nix
@@ -1,4 +1,4 @@
-{stdenv, lib, fetchurl, pythonPackages
+{ lib, fetchurl, pythonPackages
 , gnutar, unzip, lhasa, rpm, binutils, cpio, gzip, p7zip, cabextract, unrar, unshield
 , bzip2, xz, lzip
 # unzip is handled by p7zip
diff --git a/pkgs/tools/filesystems/android-file-transfer/default.nix b/pkgs/tools/filesystems/android-file-transfer/default.nix
index 68199a0938e..f0efaaa3231 100644
--- a/pkgs/tools/filesystems/android-file-transfer/default.nix
+++ b/pkgs/tools/filesystems/android-file-transfer/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, mkDerivation, fetchFromGitHub, cmake, fuse, readline, pkg-config, qtbase, qttools }:
+{ lib, mkDerivation, fetchFromGitHub, cmake, fuse, readline, pkg-config, qtbase, qttools }:
 
 mkDerivation rec {
   pname = "android-file-transfer";
diff --git a/pkgs/tools/filesystems/catcli/default.nix b/pkgs/tools/filesystems/catcli/default.nix
index 8f4e9941029..2f179a151d1 100644
--- a/pkgs/tools/filesystems/catcli/default.nix
+++ b/pkgs/tools/filesystems/catcli/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , fetchFromGitHub
 , buildPythonApplication
 , docopt, anytree
diff --git a/pkgs/tools/filesystems/convoy/default.nix b/pkgs/tools/filesystems/convoy/default.nix
index 4c493ea2252..774568fdde1 100644
--- a/pkgs/tools/filesystems/convoy/default.nix
+++ b/pkgs/tools/filesystems/convoy/default.nix
@@ -1,5 +1,5 @@
 # This file was generated by go2nix.
-{ lib, stdenv, buildGoPackage, fetchFromGitHub, lvm2 }:
+{ lib, buildGoPackage, fetchFromGitHub, lvm2 }:
 
 buildGoPackage rec {
   pname = "convoy";
diff --git a/pkgs/tools/filesystems/gitfs/default.nix b/pkgs/tools/filesystems/gitfs/default.nix
index 1d1863ede96..e4a120264fd 100644
--- a/pkgs/tools/filesystems/gitfs/default.nix
+++ b/pkgs/tools/filesystems/gitfs/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, python3Packages }:
+{ lib, fetchFromGitHub, python3Packages }:
 
 python3Packages.buildPythonApplication rec {
   pname = "gitfs";
diff --git a/pkgs/tools/filesystems/gocryptfs/default.nix b/pkgs/tools/filesystems/gocryptfs/default.nix
index 318e39e8322..b8b330c129a 100644
--- a/pkgs/tools/filesystems/gocryptfs/default.nix
+++ b/pkgs/tools/filesystems/gocryptfs/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildGoModule
 , fetchFromGitHub
 , openssl
diff --git a/pkgs/tools/filesystems/nixpart/default.nix b/pkgs/tools/filesystems/nixpart/default.nix
index 3a63ad9747f..80ae8ca2b3c 100644
--- a/pkgs/tools/filesystems/nixpart/default.nix
+++ b/pkgs/tools/filesystems/nixpart/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, buildPythonApplication, blivet }:
+{ lib, fetchurl, buildPythonApplication, blivet }:
 
 buildPythonApplication rec {
   pname = "nixpart";
diff --git a/pkgs/tools/filesystems/sandboxfs/default.nix b/pkgs/tools/filesystems/sandboxfs/default.nix
index 8777fa50a5d..32d186344dd 100644
--- a/pkgs/tools/filesystems/sandboxfs/default.nix
+++ b/pkgs/tools/filesystems/sandboxfs/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , fetchFromGitHub
 , rustPlatform
 , fuse
diff --git a/pkgs/tools/filesystems/tmsu/default.nix b/pkgs/tools/filesystems/tmsu/default.nix
index 7129de95013..1eac3e03ec9 100644
--- a/pkgs/tools/filesystems/tmsu/default.nix
+++ b/pkgs/tools/filesystems/tmsu/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub, fuse, installShellFiles }:
+{ lib, buildGoPackage, fetchFromGitHub, fuse, installShellFiles }:
 
 buildGoPackage rec {
   pname = "tmsu";
diff --git a/pkgs/tools/filesystems/ubidump/default.nix b/pkgs/tools/filesystems/ubidump/default.nix
index 2787b87964f..6a6409ad325 100644
--- a/pkgs/tools/filesystems/ubidump/default.nix
+++ b/pkgs/tools/filesystems/ubidump/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, python3, makeWrapper }:
+{ lib, fetchFromGitHub, python3, makeWrapper }:
 
 python3.pkgs.buildPythonApplication rec {
 
diff --git a/pkgs/tools/graphics/feedgnuplot/default.nix b/pkgs/tools/graphics/feedgnuplot/default.nix
index 1fe254d7785..02bb022dfb4 100644
--- a/pkgs/tools/graphics/feedgnuplot/default.nix
+++ b/pkgs/tools/graphics/feedgnuplot/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, makeWrapper, gawk
+{ lib, fetchFromGitHub, makeWrapper, gawk
 , makeFontsConf, freefont_ttf, gnuplot, perl, perlPackages
 }:
 
diff --git a/pkgs/tools/graphics/gifski/default.nix b/pkgs/tools/graphics/gifski/default.nix
index 0ce24482164..95af281d7ea 100644
--- a/pkgs/tools/graphics/gifski/default.nix
+++ b/pkgs/tools/graphics/gifski/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, rustPlatform, fetchFromGitHub, pkg-config }:
+{ lib, rustPlatform, fetchFromGitHub, pkg-config }:
 
 rustPlatform.buildRustPackage rec {
   pname = "gifski";
diff --git a/pkgs/tools/graphics/graph-easy/default.nix b/pkgs/tools/graphics/graph-easy/default.nix
index 4ae68207aae..341d6dea90a 100644
--- a/pkgs/tools/graphics/graph-easy/default.nix
+++ b/pkgs/tools/graphics/graph-easy/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, perlPackages, fetchurl }:
+{ lib, perlPackages, fetchurl }:
 
 perlPackages.buildPerlPackage {
   pname = "Graph-Easy";
diff --git a/pkgs/tools/graphics/ldgallery/compiler/default.nix b/pkgs/tools/graphics/ldgallery/compiler/default.nix
index 000f227075e..9316e9d38e0 100644
--- a/pkgs/tools/graphics/ldgallery/compiler/default.nix
+++ b/pkgs/tools/graphics/ldgallery/compiler/default.nix
@@ -1,7 +1,7 @@
 # generated with cabal2nix by ./generate.sh
 { mkDerivation, aeson, base, cmdargs, containers, data-ordlist
 , directory, fetchgit, filepath, Glob, hpack, parallel-io, process
-, safe, lib, stdenv, text, time, yaml
+, safe, lib, text, time, yaml
 }:
 mkDerivation {
   pname = "ldgallery-compiler";
diff --git a/pkgs/tools/graphics/pdfredacttools/default.nix b/pkgs/tools/graphics/pdfredacttools/default.nix
index 71d927913c3..0a1cc111b54 100644
--- a/pkgs/tools/graphics/pdfredacttools/default.nix
+++ b/pkgs/tools/graphics/pdfredacttools/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, python2Packages, imagemagick, exiftool, file, ghostscript }:
+{ lib, fetchFromGitHub, python2Packages, imagemagick, exiftool, file, ghostscript }:
 
 python2Packages.buildPythonApplication rec {
   pname = "pdf-redact-tools";
diff --git a/pkgs/tools/graphics/puppeteer-cli/default.nix b/pkgs/tools/graphics/puppeteer-cli/default.nix
index c01ee232fa7..20dab27ddf0 100644
--- a/pkgs/tools/graphics/puppeteer-cli/default.nix
+++ b/pkgs/tools/graphics/puppeteer-cli/default.nix
@@ -1,4 +1,4 @@
-{ fetchFromGitHub, makeWrapper, stdenv, chromium, mkYarnPackage
+{ fetchFromGitHub, makeWrapper, chromium, mkYarnPackage
 }:
 
 mkYarnPackage rec {
diff --git a/pkgs/tools/graphics/rocket/default.nix b/pkgs/tools/graphics/rocket/default.nix
index ec32d6c7140..070e359fe1c 100644
--- a/pkgs/tools/graphics/rocket/default.nix
+++ b/pkgs/tools/graphics/rocket/default.nix
@@ -1,4 +1,4 @@
-{ mkDerivation, lib, stdenv, fetchFromGitHub, qmake, qtbase }:
+{ mkDerivation, lib, fetchFromGitHub, qmake, qtbase }:
 
 mkDerivation {
   pname = "rocket";
diff --git a/pkgs/tools/graphics/shotgun/default.nix b/pkgs/tools/graphics/shotgun/default.nix
index 3c96584029e..79ddd39ea79 100644
--- a/pkgs/tools/graphics/shotgun/default.nix
+++ b/pkgs/tools/graphics/shotgun/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, rustPlatform, pkg-config, libXrandr, libX11 }:
+{ lib, fetchFromGitHub, rustPlatform, pkg-config, libXrandr, libX11 }:
 
 rustPlatform.buildRustPackage rec {
   pname = "shotgun";
diff --git a/pkgs/tools/graphics/svgcleaner/default.nix b/pkgs/tools/graphics/svgcleaner/default.nix
index 653e585c6ed..6c5e8569e85 100644
--- a/pkgs/tools/graphics/svgcleaner/default.nix
+++ b/pkgs/tools/graphics/svgcleaner/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, rustPlatform }:
+{ lib, fetchFromGitHub, rustPlatform }:
 
 rustPlatform.buildRustPackage rec {
   pname = "svgcleaner";
diff --git a/pkgs/tools/inputmethods/evdevremapkeys/default.nix b/pkgs/tools/inputmethods/evdevremapkeys/default.nix
index 99f7231c58a..73344ca2690 100644
--- a/pkgs/tools/inputmethods/evdevremapkeys/default.nix
+++ b/pkgs/tools/inputmethods/evdevremapkeys/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, python3Packages }:
+{ lib, fetchFromGitHub, python3Packages }:
 
 python3Packages.buildPythonPackage rec {
   pname = "evdevremapkeys";
diff --git a/pkgs/tools/inputmethods/evscript/default.nix b/pkgs/tools/inputmethods/evscript/default.nix
index 01f312fa63d..66f264bc7a3 100644
--- a/pkgs/tools/inputmethods/evscript/default.nix
+++ b/pkgs/tools/inputmethods/evscript/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, rustPlatform, fetchFromGitHub }:
+{ lib, rustPlatform, fetchFromGitHub }:
 
 rustPlatform.buildRustPackage rec {
   pname = "evscript";
diff --git a/pkgs/tools/inputmethods/fcitx5/fcitx5-chinese-addons.nix b/pkgs/tools/inputmethods/fcitx5/fcitx5-chinese-addons.nix
index 923fd7c7a74..6d3952c9c22 100644
--- a/pkgs/tools/inputmethods/fcitx5/fcitx5-chinese-addons.nix
+++ b/pkgs/tools/inputmethods/fcitx5/fcitx5-chinese-addons.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , mkDerivation
 , fetchurl
 , fetchFromGitHub
diff --git a/pkgs/tools/inputmethods/fcitx5/fcitx5-configtool.nix b/pkgs/tools/inputmethods/fcitx5/fcitx5-configtool.nix
index ba006873c40..b133d576c6c 100644
--- a/pkgs/tools/inputmethods/fcitx5/fcitx5-configtool.nix
+++ b/pkgs/tools/inputmethods/fcitx5/fcitx5-configtool.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , mkDerivation
 , fetchFromGitHub
 , cmake
diff --git a/pkgs/tools/inputmethods/fcitx5/fcitx5-qt.nix b/pkgs/tools/inputmethods/fcitx5/fcitx5-qt.nix
index 155f10fae26..bfb06a98e8f 100644
--- a/pkgs/tools/inputmethods/fcitx5/fcitx5-qt.nix
+++ b/pkgs/tools/inputmethods/fcitx5/fcitx5-qt.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , mkDerivation
 , fetchFromGitHub
 , cmake
diff --git a/pkgs/tools/inputmethods/ibus/wrapper.nix b/pkgs/tools/inputmethods/ibus/wrapper.nix
index 74426b2b04e..93078325a0d 100644
--- a/pkgs/tools/inputmethods/ibus/wrapper.nix
+++ b/pkgs/tools/inputmethods/ibus/wrapper.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, runCommand, makeWrapper, lndir
+{ lib, runCommand, makeWrapper, lndir
 , dconf, hicolor-icon-theme, ibus, librsvg, plugins ? []
 }:
 
diff --git a/pkgs/tools/misc/3mux/default.nix b/pkgs/tools/misc/3mux/default.nix
index 3f1e981fd0e..3c51210edc7 100644
--- a/pkgs/tools/misc/3mux/default.nix
+++ b/pkgs/tools/misc/3mux/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "3mux";
diff --git a/pkgs/tools/misc/adafruit-ampy/default.nix b/pkgs/tools/misc/adafruit-ampy/default.nix
index f5149737639..c9466f54a62 100644
--- a/pkgs/tools/misc/adafruit-ampy/default.nix
+++ b/pkgs/tools/misc/adafruit-ampy/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python3 }:
+{ lib, python3 }:
 
 with python3.pkgs;
 
diff --git a/pkgs/tools/misc/apt-offline/default.nix b/pkgs/tools/misc/apt-offline/default.nix
index 5c17b7f2d13..9c952cc7c30 100644
--- a/pkgs/tools/misc/apt-offline/default.nix
+++ b/pkgs/tools/misc/apt-offline/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, python3Packages }:
+{ lib, fetchFromGitHub, python3Packages }:
 
 python3Packages.buildPythonApplication rec {
   version = "1.8.1";
diff --git a/pkgs/tools/misc/aptly/default.nix b/pkgs/tools/misc/aptly/default.nix
index 369f7dd219f..7f82aebabe4 100644
--- a/pkgs/tools/misc/aptly/default.nix
+++ b/pkgs/tools/misc/aptly/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub, installShellFiles, makeWrapper, gnupg, bzip2, xz, graphviz }:
+{ lib, buildGoPackage, fetchFromGitHub, installShellFiles, makeWrapper, gnupg, bzip2, xz, graphviz }:
 
 let
 
diff --git a/pkgs/tools/misc/asciinema-scenario/default.nix b/pkgs/tools/misc/asciinema-scenario/default.nix
index 25bac976843..f6991662114 100644
--- a/pkgs/tools/misc/asciinema-scenario/default.nix
+++ b/pkgs/tools/misc/asciinema-scenario/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , rustPlatform
 , fetchCrate
 }:
diff --git a/pkgs/tools/misc/azure-vhd-utils/default.nix b/pkgs/tools/misc/azure-vhd-utils/default.nix
index f8a17790ba1..ad48eae7a87 100644
--- a/pkgs/tools/misc/azure-vhd-utils/default.nix
+++ b/pkgs/tools/misc/azure-vhd-utils/default.nix
@@ -1,5 +1,5 @@
 # This file was generated by go2nix.
-{ lib, stdenv, buildGoPackage, fetchgit }:
+{ lib, buildGoPackage, fetchgit }:
 
 buildGoPackage rec {
   pname = "azure-vhd-utils";
diff --git a/pkgs/tools/misc/bashplotlib/default.nix b/pkgs/tools/misc/bashplotlib/default.nix
index cc3476f598b..44d7e93355b 100644
--- a/pkgs/tools/misc/bashplotlib/default.nix
+++ b/pkgs/tools/misc/bashplotlib/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python3Packages, fetchFromGitHub }:
+{ lib, python3Packages, fetchFromGitHub }:
 
 python3Packages.buildPythonApplication {
   pname = "bashplotlib";
diff --git a/pkgs/tools/misc/bmap-tools/default.nix b/pkgs/tools/misc/bmap-tools/default.nix
index ed42f31f26b..79094dc9540 100644
--- a/pkgs/tools/misc/bmap-tools/default.nix
+++ b/pkgs/tools/misc/bmap-tools/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, python2Packages }:
+{ lib, fetchFromGitHub, python2Packages }:
 
 python2Packages.buildPythonApplication rec {
   pname = "bmap-tools";
diff --git a/pkgs/tools/misc/bonfire/default.nix b/pkgs/tools/misc/bonfire/default.nix
index cda58e80d87..a3f1608c3ad 100644
--- a/pkgs/tools/misc/bonfire/default.nix
+++ b/pkgs/tools/misc/bonfire/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python3Packages, fetchFromGitHub }:
+{ lib, python3Packages, fetchFromGitHub }:
 
 with python3Packages;
 
diff --git a/pkgs/tools/misc/broadlink-cli/default.nix b/pkgs/tools/misc/broadlink-cli/default.nix
index 53925b87591..cb5f582d2de 100644
--- a/pkgs/tools/misc/broadlink-cli/default.nix
+++ b/pkgs/tools/misc/broadlink-cli/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python3Packages, fetchFromGitHub }:
+{ lib, python3Packages, fetchFromGitHub }:
 
 python3Packages.buildPythonApplication {
   pname = "broadlink-cli";
diff --git a/pkgs/tools/misc/chezmoi/default.nix b/pkgs/tools/misc/chezmoi/default.nix
index 15a2a643d32..48d8b7c8930 100644
--- a/pkgs/tools/misc/chezmoi/default.nix
+++ b/pkgs/tools/misc/chezmoi/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub, installShellFiles }:
+{ lib, buildGoModule, fetchFromGitHub, installShellFiles }:
 
 buildGoModule rec {
   pname = "chezmoi";
diff --git a/pkgs/tools/misc/ckb-next/default.nix b/pkgs/tools/misc/ckb-next/default.nix
index 6c13c3bbe6a..9c6909d445d 100644
--- a/pkgs/tools/misc/ckb-next/default.nix
+++ b/pkgs/tools/misc/ckb-next/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, mkDerivation, fetchFromGitHub, substituteAll, udev
+{ lib, mkDerivation, fetchFromGitHub, substituteAll, udev
 , pkg-config, qtbase, cmake, zlib, kmod }:
 
 mkDerivation rec {
diff --git a/pkgs/tools/misc/claws/default.nix b/pkgs/tools/misc/claws/default.nix
index 20c8cc7af8f..c28272e8bfa 100644
--- a/pkgs/tools/misc/claws/default.nix
+++ b/pkgs/tools/misc/claws/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "claws";
diff --git a/pkgs/tools/misc/cloud-sql-proxy/default.nix b/pkgs/tools/misc/cloud-sql-proxy/default.nix
index 11bfdc508eb..552ea140d60 100644
--- a/pkgs/tools/misc/cloud-sql-proxy/default.nix
+++ b/pkgs/tools/misc/cloud-sql-proxy/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchgit }:
+{ lib, buildGoPackage, fetchgit }:
 
 buildGoPackage rec {
   pname = "cloud-sql-proxy";
diff --git a/pkgs/tools/misc/code-minimap/default.nix b/pkgs/tools/misc/code-minimap/default.nix
index 0ccfe424645..4808fe3ef56 100644
--- a/pkgs/tools/misc/code-minimap/default.nix
+++ b/pkgs/tools/misc/code-minimap/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , rustPlatform
 , fetchFromGitHub
 }:
diff --git a/pkgs/tools/misc/codebraid/default.nix b/pkgs/tools/misc/codebraid/default.nix
index a855dac5f12..0ecde80c238 100644
--- a/pkgs/tools/misc/codebraid/default.nix
+++ b/pkgs/tools/misc/codebraid/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python3Packages, fetchFromGitHub }:
+{ lib, python3Packages, fetchFromGitHub }:
 
 python3Packages.buildPythonApplication rec {
   pname = "codebraid";
diff --git a/pkgs/tools/misc/crudini/default.nix b/pkgs/tools/misc/crudini/default.nix
index a4b499a6323..6527a01e43b 100644
--- a/pkgs/tools/misc/crudini/default.nix
+++ b/pkgs/tools/misc/crudini/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, python3Packages, help2man, installShellFiles }:
+{ lib, fetchFromGitHub, python3Packages, help2man, installShellFiles }:
 
 python3Packages.buildPythonApplication rec {
   pname = "crudini";
diff --git a/pkgs/tools/misc/dashing/default.nix b/pkgs/tools/misc/dashing/default.nix
index 546daef5ecb..496639ec07a 100644
--- a/pkgs/tools/misc/dashing/default.nix
+++ b/pkgs/tools/misc/dashing/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "dashing";
diff --git a/pkgs/tools/misc/diskonaut/default.nix b/pkgs/tools/misc/diskonaut/default.nix
index 6c295eb00e8..0fb31685170 100644
--- a/pkgs/tools/misc/diskonaut/default.nix
+++ b/pkgs/tools/misc/diskonaut/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, rustPlatform, fetchFromGitHub }:
+{ lib, rustPlatform, fetchFromGitHub }:
 
 rustPlatform.buildRustPackage rec {
   pname = "diskonaut";
diff --git a/pkgs/tools/misc/docker-ls/default.nix b/pkgs/tools/misc/docker-ls/default.nix
index df9755f863d..b8483068117 100644
--- a/pkgs/tools/misc/docker-ls/default.nix
+++ b/pkgs/tools/misc/docker-ls/default.nix
@@ -1,4 +1,4 @@
-{ buildGoModule, fetchFromGitHub, lib, stdenv, docker }:
+{ buildGoModule, fetchFromGitHub, lib, docker }:
 
 buildGoModule rec {
   pname = "docker-ls";
diff --git a/pkgs/tools/misc/docui/default.nix b/pkgs/tools/misc/docui/default.nix
index e4934853e82..a1b2ad662bc 100644
--- a/pkgs/tools/misc/docui/default.nix
+++ b/pkgs/tools/misc/docui/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "docui";
diff --git a/pkgs/tools/misc/doitlive/default.nix b/pkgs/tools/misc/doitlive/default.nix
index 313dc9935fa..9edc078d9f9 100644
--- a/pkgs/tools/misc/doitlive/default.nix
+++ b/pkgs/tools/misc/doitlive/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python3Packages }:
+{ lib, python3Packages }:
 
 python3Packages.buildPythonApplication rec {
   pname = "doitlive";
diff --git a/pkgs/tools/misc/dust/default.nix b/pkgs/tools/misc/dust/default.nix
index c40753dcf99..7997f2119a2 100644
--- a/pkgs/tools/misc/dust/default.nix
+++ b/pkgs/tools/misc/dust/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, rustPlatform }:
+{ lib, fetchFromGitHub, rustPlatform }:
 
 rustPlatform.buildRustPackage rec {
   pname = "du-dust";
diff --git a/pkgs/tools/misc/envdir-go/default.nix b/pkgs/tools/misc/envdir-go/default.nix
index 7ec763f16c6..eafc71030ac 100644
--- a/pkgs/tools/misc/envdir-go/default.nix
+++ b/pkgs/tools/misc/envdir-go/default.nix
@@ -1,5 +1,5 @@
 # This file was generated by https://github.com/kamilchm/go2nix v1.2.1
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   version = "1.0.0";
diff --git a/pkgs/tools/misc/esptool/default.nix b/pkgs/tools/misc/esptool/default.nix
index 89be1da8cc9..7c7f91621b8 100644
--- a/pkgs/tools/misc/esptool/default.nix
+++ b/pkgs/tools/misc/esptool/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, python3, openssl }:
+{ lib, fetchFromGitHub, python3, openssl }:
 
 python3.pkgs.buildPythonApplication rec {
   pname = "esptool";
diff --git a/pkgs/tools/misc/eva/default.nix b/pkgs/tools/misc/eva/default.nix
index 65da084f841..253e815008a 100644
--- a/pkgs/tools/misc/eva/default.nix
+++ b/pkgs/tools/misc/eva/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, rustPlatform, fetchpatch }:
+{ lib, fetchFromGitHub, rustPlatform, fetchpatch }:
 
 rustPlatform.buildRustPackage rec {
   pname = "eva";
diff --git a/pkgs/tools/misc/fselect/default.nix b/pkgs/tools/misc/fselect/default.nix
index 1076c44a1bb..7416961e84e 100644
--- a/pkgs/tools/misc/fselect/default.nix
+++ b/pkgs/tools/misc/fselect/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, rustPlatform, installShellFiles }:
+{ lib, fetchFromGitHub, rustPlatform, installShellFiles }:
 
 rustPlatform.buildRustPackage rec {
   pname = "fselect";
diff --git a/pkgs/tools/misc/fsql/default.nix b/pkgs/tools/misc/fsql/default.nix
index 8e113ee871a..100e7023232 100644
--- a/pkgs/tools/misc/fsql/default.nix
+++ b/pkgs/tools/misc/fsql/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "fsql";
diff --git a/pkgs/tools/misc/g933-utils/default.nix b/pkgs/tools/misc/g933-utils/default.nix
index 9cb05609772..7fbfadfac76 100644
--- a/pkgs/tools/misc/g933-utils/default.nix
+++ b/pkgs/tools/misc/g933-utils/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, rustPlatform, udev, pkg-config }:
+{ lib, fetchFromGitHub, rustPlatform, udev, pkg-config }:
 
 rustPlatform.buildRustPackage rec {
   pname = "g933-utils";
diff --git a/pkgs/tools/misc/gawp/default.nix b/pkgs/tools/misc/gawp/default.nix
index d518ba88fb6..5c7953a766e 100644
--- a/pkgs/tools/misc/gawp/default.nix
+++ b/pkgs/tools/misc/gawp/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchgit }:
+{ lib, buildGoPackage, fetchgit }:
 
 with builtins;
 
diff --git a/pkgs/tools/misc/gh-ost/default.nix b/pkgs/tools/misc/gh-ost/default.nix
index 6096dac9622..dd28ddfaff5 100644
--- a/pkgs/tools/misc/gh-ost/default.nix
+++ b/pkgs/tools/misc/gh-ost/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "gh-ost";
diff --git a/pkgs/tools/misc/gif-for-cli/default.nix b/pkgs/tools/misc/gif-for-cli/default.nix
index e82cafdd64c..bbb1b8b9640 100644
--- a/pkgs/tools/misc/gif-for-cli/default.nix
+++ b/pkgs/tools/misc/gif-for-cli/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, python3Packages, ffmpeg, zlib, libjpeg }:
+{ lib, fetchFromGitHub, python3Packages, ffmpeg, zlib, libjpeg }:
 
 python3Packages.buildPythonApplication {
   pname = "gif-for-cli";
diff --git a/pkgs/tools/misc/git-town/default.nix b/pkgs/tools/misc/git-town/default.nix
index cf3a6aba19f..56f9452db7b 100644
--- a/pkgs/tools/misc/git-town/default.nix
+++ b/pkgs/tools/misc/git-town/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "git-town";
diff --git a/pkgs/tools/misc/go.rice/default.nix b/pkgs/tools/misc/go.rice/default.nix
index 26b082e43b3..295bf010279 100644
--- a/pkgs/tools/misc/go.rice/default.nix
+++ b/pkgs/tools/misc/go.rice/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "go.rice";
diff --git a/pkgs/tools/misc/gosu/default.nix b/pkgs/tools/misc/gosu/default.nix
index 7bc7eab3456..033883ab1c8 100644
--- a/pkgs/tools/misc/gosu/default.nix
+++ b/pkgs/tools/misc/gosu/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchgit }:
+{ lib, buildGoPackage, fetchgit }:
 
 buildGoPackage rec {
   pname = "gosu";
diff --git a/pkgs/tools/misc/grc/default.nix b/pkgs/tools/misc/grc/default.nix
index 3188dcdafbf..8fe35012090 100644
--- a/pkgs/tools/misc/grc/default.nix
+++ b/pkgs/tools/misc/grc/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, python3Packages }:
+{ lib, fetchFromGitHub, python3Packages }:
 
 python3Packages.buildPythonApplication rec {
   pname = "grc";
diff --git a/pkgs/tools/misc/hacksaw/default.nix b/pkgs/tools/misc/hacksaw/default.nix
index a0e884e82d9..419cff20087 100644
--- a/pkgs/tools/misc/hacksaw/default.nix
+++ b/pkgs/tools/misc/hacksaw/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchCrate, rustPlatform, pkg-config, libXrandr, libX11, python3 }:
+{ lib, fetchCrate, rustPlatform, pkg-config, libXrandr, libX11, python3 }:
 
 rustPlatform.buildRustPackage rec {
   pname = "hacksaw";
diff --git a/pkgs/tools/misc/heatseeker/default.nix b/pkgs/tools/misc/heatseeker/default.nix
index 13933c6c28a..9d50530df47 100644
--- a/pkgs/tools/misc/heatseeker/default.nix
+++ b/pkgs/tools/misc/heatseeker/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, rustPlatform, coreutils }:
+{ lib, fetchFromGitHub, rustPlatform, coreutils }:
 
 rustPlatform.buildRustPackage rec {
   pname = "heatseeker";
diff --git a/pkgs/tools/misc/hexyl/default.nix b/pkgs/tools/misc/hexyl/default.nix
index e75d0105731..d825368cb97 100644
--- a/pkgs/tools/misc/hexyl/default.nix
+++ b/pkgs/tools/misc/hexyl/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, rustPlatform }:
+{ lib, fetchFromGitHub, rustPlatform }:
 
 rustPlatform.buildRustPackage rec {
   pname   = "hexyl";
diff --git a/pkgs/tools/misc/hyperledger-fabric/default.nix b/pkgs/tools/misc/hyperledger-fabric/default.nix
index 13a88dcba30..9f7fa31d3f2 100644
--- a/pkgs/tools/misc/hyperledger-fabric/default.nix
+++ b/pkgs/tools/misc/hyperledger-fabric/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "hyperledger-fabric";
diff --git a/pkgs/tools/misc/i3cat/default.nix b/pkgs/tools/misc/i3cat/default.nix
index d75b878ae6d..e91b17856ed 100644
--- a/pkgs/tools/misc/i3cat/default.nix
+++ b/pkgs/tools/misc/i3cat/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchgit }:
+{ lib, buildGoPackage, fetchgit }:
 
 buildGoPackage rec {
   pname = "i3cat";
diff --git a/pkgs/tools/misc/i3minator/default.nix b/pkgs/tools/misc/i3minator/default.nix
index d58efd7a0d4..6e207ce6916 100644
--- a/pkgs/tools/misc/i3minator/default.nix
+++ b/pkgs/tools/misc/i3minator/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, pythonPackages, glibcLocales }:
+{ lib, fetchFromGitHub, pythonPackages, glibcLocales }:
 
 pythonPackages.buildPythonApplication rec {
   pname = "i3minator";
diff --git a/pkgs/tools/misc/ical2org/default.nix b/pkgs/tools/misc/ical2org/default.nix
index 58afffcd706..78f40974ace 100644
--- a/pkgs/tools/misc/ical2org/default.nix
+++ b/pkgs/tools/misc/ical2org/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, buildGoPackage}:
+{ lib, fetchFromGitHub, buildGoPackage}:
 
 buildGoPackage rec {
   pname = "ical2org";
diff --git a/pkgs/tools/misc/kargo/default.nix b/pkgs/tools/misc/kargo/default.nix
index 00bf9403427..8c24848f4b5 100644
--- a/pkgs/tools/misc/kargo/default.nix
+++ b/pkgs/tools/misc/kargo/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, python3Packages }:
+{ lib, fetchurl, python3Packages }:
 
 with python3Packages;
 
diff --git a/pkgs/tools/misc/kt/default.nix b/pkgs/tools/misc/kt/default.nix
index 8d70b35584e..e4713890ac4 100644
--- a/pkgs/tools/misc/kt/default.nix
+++ b/pkgs/tools/misc/kt/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, buildGoPackage }:
+{ lib, fetchFromGitHub, buildGoPackage }:
 
 buildGoPackage rec {
   pname = "kt";
diff --git a/pkgs/tools/misc/lazydocker/default.nix b/pkgs/tools/misc/lazydocker/default.nix
index ea66a04a40d..ed186772ab7 100644
--- a/pkgs/tools/misc/lazydocker/default.nix
+++ b/pkgs/tools/misc/lazydocker/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "lazydocker";
diff --git a/pkgs/tools/misc/lice/default.nix b/pkgs/tools/misc/lice/default.nix
index f7a8c68ed06..3322196d6ed 100644
--- a/pkgs/tools/misc/lice/default.nix
+++ b/pkgs/tools/misc/lice/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, python3Packages }:
+{ lib, fetchFromGitHub, python3Packages }:
 
 python3Packages.buildPythonPackage rec {
 
diff --git a/pkgs/tools/misc/lnch/default.nix b/pkgs/tools/misc/lnch/default.nix
index 377ba05eba6..8f41499ca06 100644
--- a/pkgs/tools/misc/lnch/default.nix
+++ b/pkgs/tools/misc/lnch/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, buildGoPackage }:
+{ lib, fetchFromGitHub, buildGoPackage }:
 
 buildGoPackage rec {
   pname = "lnch";
diff --git a/pkgs/tools/misc/lokalise2-cli/default.nix b/pkgs/tools/misc/lokalise2-cli/default.nix
index 1b2fa9bda86..0cbf43a8790 100644
--- a/pkgs/tools/misc/lokalise2-cli/default.nix
+++ b/pkgs/tools/misc/lokalise2-cli/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "lokalise2-cli";
diff --git a/pkgs/tools/misc/loop/default.nix b/pkgs/tools/misc/loop/default.nix
index b7bd7678535..0c3e206a9f2 100644
--- a/pkgs/tools/misc/loop/default.nix
+++ b/pkgs/tools/misc/loop/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, rustPlatform }:
+{ lib, fetchFromGitHub, rustPlatform }:
 
 rustPlatform.buildRustPackage {
   pname = "loop";
diff --git a/pkgs/tools/misc/lsd/default.nix b/pkgs/tools/misc/lsd/default.nix
index 239c9651b86..c3c9fab8c1e 100644
--- a/pkgs/tools/misc/lsd/default.nix
+++ b/pkgs/tools/misc/lsd/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , nixosTests
 , fetchFromGitHub
 , rustPlatform
diff --git a/pkgs/tools/misc/me_cleaner/default.nix b/pkgs/tools/misc/me_cleaner/default.nix
index 19f43f2c8c5..5335624467d 100644
--- a/pkgs/tools/misc/me_cleaner/default.nix
+++ b/pkgs/tools/misc/me_cleaner/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub }:
+{ lib, buildPythonPackage, fetchFromGitHub }:
 
 buildPythonPackage rec {
   pname = "me_cleaner";
diff --git a/pkgs/tools/misc/microplane/default.nix b/pkgs/tools/misc/microplane/default.nix
index a0ac411f98e..131367cf9f2 100644
--- a/pkgs/tools/misc/microplane/default.nix
+++ b/pkgs/tools/misc/microplane/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "microplane";
diff --git a/pkgs/tools/misc/mimeo/default.nix b/pkgs/tools/misc/mimeo/default.nix
index 6c332198fa7..f2ef73cfd99 100644
--- a/pkgs/tools/misc/mimeo/default.nix
+++ b/pkgs/tools/misc/mimeo/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, desktop-file-utils, file, python3Packages }:
+{ lib, fetchurl, desktop-file-utils, file, python3Packages }:
 
 python3Packages.buildPythonApplication rec {
   pname = "mimeo";
diff --git a/pkgs/tools/misc/mmake/default.nix b/pkgs/tools/misc/mmake/default.nix
index 5dcbcb065ec..564e1989aee 100644
--- a/pkgs/tools/misc/mmake/default.nix
+++ b/pkgs/tools/misc/mmake/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "mmake";
diff --git a/pkgs/tools/misc/mongodb-tools/default.nix b/pkgs/tools/misc/mongodb-tools/default.nix
index 0415955e092..7949a82edc4 100644
--- a/pkgs/tools/misc/mongodb-tools/default.nix
+++ b/pkgs/tools/misc/mongodb-tools/default.nix
@@ -1,5 +1,4 @@
-{ stdenv
-, lib
+{ lib
 , buildGoPackage
 , fetchFromGitHub
 , openssl
diff --git a/pkgs/tools/misc/nagstamon/default.nix b/pkgs/tools/misc/nagstamon/default.nix
index 3bd297628b2..e9f76dbf22d 100644
--- a/pkgs/tools/misc/nagstamon/default.nix
+++ b/pkgs/tools/misc/nagstamon/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, pythonPackages }:
+{ lib, fetchurl, pythonPackages }:
 
 pythonPackages.buildPythonApplication rec {
   pname = "nagstamon";
diff --git a/pkgs/tools/misc/noteshrink/default.nix b/pkgs/tools/misc/noteshrink/default.nix
index 2d6f23de468..67c49c3ad0d 100644
--- a/pkgs/tools/misc/noteshrink/default.nix
+++ b/pkgs/tools/misc/noteshrink/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, python3, imagemagick }:
+{ lib, fetchFromGitHub, python3, imagemagick }:
 
 with python3.pkgs;
 
diff --git a/pkgs/tools/misc/ntfy/default.nix b/pkgs/tools/misc/ntfy/default.nix
index 9f28d99ba0f..23d4fd57f62 100644
--- a/pkgs/tools/misc/ntfy/default.nix
+++ b/pkgs/tools/misc/ntfy/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python3Packages, fetchFromGitHub }:
+{ lib, python3Packages, fetchFromGitHub }:
 
 python3Packages.buildPythonApplication rec {
   pname = "ntfy";
diff --git a/pkgs/tools/misc/pdd/default.nix b/pkgs/tools/misc/pdd/default.nix
index b339f94deb1..916f15c94c6 100644
--- a/pkgs/tools/misc/pdd/default.nix
+++ b/pkgs/tools/misc/pdd/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, buildPythonApplication, dateutil }:
+{ lib, fetchFromGitHub, buildPythonApplication, dateutil }:
 
 buildPythonApplication rec {
   pname = "pdd";
diff --git a/pkgs/tools/misc/pdf-parser/default.nix b/pkgs/tools/misc/pdf-parser/default.nix
index ceb8b4d68d9..f4572d0e5bc 100644
--- a/pkgs/tools/misc/pdf-parser/default.nix
+++ b/pkgs/tools/misc/pdf-parser/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python3Packages, fetchzip }:
+{ lib, python3Packages, fetchzip }:
 
 python3Packages.buildPythonApplication {
   pname = "pdf-parser";
diff --git a/pkgs/tools/misc/pgcenter/default.nix b/pkgs/tools/misc/pgcenter/default.nix
index 5a59e3030e6..8afaa61e35b 100644
--- a/pkgs/tools/misc/pgcenter/default.nix
+++ b/pkgs/tools/misc/pgcenter/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "pgcenter";
diff --git a/pkgs/tools/misc/pgmetrics/default.nix b/pkgs/tools/misc/pgmetrics/default.nix
index 70429ef811a..54e7093747b 100644
--- a/pkgs/tools/misc/pgmetrics/default.nix
+++ b/pkgs/tools/misc/pgmetrics/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "pgmetrics";
diff --git a/pkgs/tools/misc/phraseapp-client/default.nix b/pkgs/tools/misc/phraseapp-client/default.nix
index 27c486f4bea..12b11cf20d0 100644
--- a/pkgs/tools/misc/phraseapp-client/default.nix
+++ b/pkgs/tools/misc/phraseapp-client/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "phraseapp-client";
diff --git a/pkgs/tools/misc/pistol/default.nix b/pkgs/tools/misc/pistol/default.nix
index 874bbdbaf70..6eec45db011 100644
--- a/pkgs/tools/misc/pistol/default.nix
+++ b/pkgs/tools/misc/pistol/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildGoModule
 , fetchFromGitHub
 , file
diff --git a/pkgs/tools/misc/powerline-go/default.nix b/pkgs/tools/misc/powerline-go/default.nix
index 2b46e25c67e..f69a5c7d380 100644
--- a/pkgs/tools/misc/powerline-go/default.nix
+++ b/pkgs/tools/misc/powerline-go/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "powerline-go";
diff --git a/pkgs/tools/misc/pubs/default.nix b/pkgs/tools/misc/pubs/default.nix
index 82e7659d152..be5fd6d499c 100644
--- a/pkgs/tools/misc/pubs/default.nix
+++ b/pkgs/tools/misc/pubs/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, fetchpatch, python3Packages }:
+{ lib, fetchFromGitHub, fetchpatch, python3Packages }:
 
 python3Packages.buildPythonApplication rec {
   pname = "pubs";
diff --git a/pkgs/tools/misc/rargs/default.nix b/pkgs/tools/misc/rargs/default.nix
index 834a62803f6..dc07e3dd4f4 100644
--- a/pkgs/tools/misc/rargs/default.nix
+++ b/pkgs/tools/misc/rargs/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, rustPlatform, fetchFromGitHub }:
+{ lib, rustPlatform, fetchFromGitHub }:
 
 rustPlatform.buildRustPackage rec {
   pname   = "rargs";
diff --git a/pkgs/tools/misc/rename/default.nix b/pkgs/tools/misc/rename/default.nix
index 63ceca8d934..a9f42d1139e 100644
--- a/pkgs/tools/misc/rename/default.nix
+++ b/pkgs/tools/misc/rename/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, perlPackages }:
+{ lib, fetchFromGitHub, perlPackages }:
 
 perlPackages.buildPerlPackage {
   pname = "rename";
diff --git a/pkgs/tools/misc/shelldap/default.nix b/pkgs/tools/misc/shelldap/default.nix
index 41e4207d6c9..18c5aea3dfd 100644
--- a/pkgs/tools/misc/shelldap/default.nix
+++ b/pkgs/tools/misc/shelldap/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, perlPackages }:
+{ lib, fetchurl, perlPackages }:
 perlPackages.buildPerlPackage rec {
   pname = "shelldap";
   version = "1.4.0";
diff --git a/pkgs/tools/misc/swaglyrics/default.nix b/pkgs/tools/misc/swaglyrics/default.nix
index c24b12f9539..4bc5c28b559 100644
--- a/pkgs/tools/misc/swaglyrics/default.nix
+++ b/pkgs/tools/misc/swaglyrics/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, python3, fetchFromGitHub, ncurses }:
+{ lib, python3, fetchFromGitHub, ncurses }:
 
 python3.pkgs.buildPythonApplication rec {
   pname = "swaglyrics";
diff --git a/pkgs/tools/misc/systrayhelper/default.nix b/pkgs/tools/misc/systrayhelper/default.nix
index e898ded8154..03d8e58f8b0 100644
--- a/pkgs/tools/misc/systrayhelper/default.nix
+++ b/pkgs/tools/misc/systrayhelper/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, pkg-config, libappindicator-gtk3, buildGoPackage, fetchFromGitHub }:
+{ lib, pkg-config, libappindicator-gtk3, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "systrayhelper";
diff --git a/pkgs/tools/misc/tagref/default.nix b/pkgs/tools/misc/tagref/default.nix
index 43a91eaca52..ba63ec290d4 100644
--- a/pkgs/tools/misc/tagref/default.nix
+++ b/pkgs/tools/misc/tagref/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, fetchFromGitHub, rustPlatform }:
+{ lib, fetchFromGitHub, rustPlatform }:
 rustPlatform.buildRustPackage rec {
   pname = "tagref";
   version = "1.4.1";
diff --git a/pkgs/tools/misc/tensorman/default.nix b/pkgs/tools/misc/tensorman/default.nix
index 84bfdc55d7f..0e724059e99 100644
--- a/pkgs/tools/misc/tensorman/default.nix
+++ b/pkgs/tools/misc/tensorman/default.nix
@@ -1,4 +1,4 @@
-{ pkg-config, lib, stdenv, rustPlatform, rustc, cargo, docker, openssl, fetchFromGitHub }:
+{ pkg-config, lib, rustPlatform, rustc, cargo, docker, openssl, fetchFromGitHub }:
 
 rustPlatform.buildRustPackage rec {
   pname = "tensorman";
diff --git a/pkgs/tools/misc/tewisay/default.nix b/pkgs/tools/misc/tewisay/default.nix
index 0e07f3e53f3..3434ac110b3 100644
--- a/pkgs/tools/misc/tewisay/default.nix
+++ b/pkgs/tools/misc/tewisay/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub, makeWrapper }:
+{ lib, buildGoPackage, fetchFromGitHub, makeWrapper }:
 
 buildGoPackage rec {
   pname = "tewisay-unstable";
diff --git a/pkgs/tools/misc/thefuck/default.nix b/pkgs/tools/misc/thefuck/default.nix
index bf87505ab13..d26c750a0c7 100644
--- a/pkgs/tools/misc/thefuck/default.nix
+++ b/pkgs/tools/misc/thefuck/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, buildPythonApplication
+{ lib, fetchFromGitHub, buildPythonApplication
 , colorama, decorator, psutil, pyte, six
 , pytest, pytest-mock
 }:
diff --git a/pkgs/tools/misc/tmuxp/default.nix b/pkgs/tools/misc/tmuxp/default.nix
index 940ae130c84..57d320fd790 100644
--- a/pkgs/tools/misc/tmuxp/default.nix
+++ b/pkgs/tools/misc/tmuxp/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python }:
+{ lib, python }:
 
 with python.pkgs;
 
diff --git a/pkgs/tools/misc/togglesg-download/default.nix b/pkgs/tools/misc/togglesg-download/default.nix
index c4d8b20ffdd..812ad7900d0 100644
--- a/pkgs/tools/misc/togglesg-download/default.nix
+++ b/pkgs/tools/misc/togglesg-download/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, fetchFromGitHub, pythonPackages, makeWrapper, ffmpeg_3 }:
+{ lib, fetchFromGitHub, pythonPackages, makeWrapper, ffmpeg_3 }:
 
 pythonPackages.buildPythonApplication {
 
diff --git a/pkgs/tools/misc/trash-cli/default.nix b/pkgs/tools/misc/trash-cli/default.nix
index 1da49a153b8..d199fd7fda3 100644
--- a/pkgs/tools/misc/trash-cli/default.nix
+++ b/pkgs/tools/misc/trash-cli/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, python3Packages }:
+{ lib, fetchFromGitHub, python3Packages }:
 
 python3Packages.buildPythonApplication rec {
   pname = "trash-cli";
diff --git a/pkgs/tools/misc/trillian/default.nix b/pkgs/tools/misc/trillian/default.nix
index 07b4d834978..8a96248e718 100644
--- a/pkgs/tools/misc/trillian/default.nix
+++ b/pkgs/tools/misc/trillian/default.nix
@@ -1,15 +1,11 @@
-{ stdenv
-, lib
+{ lib
 , buildGoModule
 , fetchFromGitHub
 }:
-let
+
+buildGoModule rec {
   pname = "trillian";
   version = "1.3.11";
-
-in
-buildGoModule {
-  inherit pname version;
   vendorSha256 = "0zxp1gjzcc3z6vkpc2bchbs1shwm1b28ks0jh4gf6zxpp4361j4l";
 
   src = fetchFromGitHub {
@@ -34,10 +30,10 @@ buildGoModule {
     "cmd/updatetree"
   ];
 
-  meta = {
+  meta = with lib; {
     homepage = "https://github.com/google/trillian";
     description = "A transparent, highly scalable and cryptographically verifiable data store.";
-    license = [ lib.licenses.asl20 ];
-    maintainers = [ lib.maintainers.adisbladis ];
+    license = [ licenses.asl20 ];
+    maintainers = [ maintainers.adisbladis ];
   };
 }
diff --git a/pkgs/tools/misc/tydra/default.nix b/pkgs/tools/misc/tydra/default.nix
index 6714ee489f5..00c8aa2a2c3 100644
--- a/pkgs/tools/misc/tydra/default.nix
+++ b/pkgs/tools/misc/tydra/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, rustPlatform, fetchFromGitHub, installShellFiles }:
+{ lib, rustPlatform, fetchFromGitHub, installShellFiles }:
 
 rustPlatform.buildRustPackage rec {
   pname = "tydra";
diff --git a/pkgs/tools/misc/unicode/default.nix b/pkgs/tools/misc/unicode/default.nix
index c8e1a0f7ca4..a2bc615ed86 100644
--- a/pkgs/tools/misc/unicode/default.nix
+++ b/pkgs/tools/misc/unicode/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, fetchurl, python3Packages, installShellFiles }:
+{ lib, fetchFromGitHub, fetchurl, python3Packages, installShellFiles }:
 
 python3Packages.buildPythonApplication rec {
   pname = "unicode";
diff --git a/pkgs/tools/misc/upower-notify/default.nix b/pkgs/tools/misc/upower-notify/default.nix
index ddc0fa42c69..79460f3a5b7 100644
--- a/pkgs/tools/misc/upower-notify/default.nix
+++ b/pkgs/tools/misc/upower-notify/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchgit }:
+{ lib, buildGoPackage, fetchgit }:
 
 # To use upower-notify, the maintainer suggests adding something like this to your configuration.nix:
 #
diff --git a/pkgs/tools/misc/vimwiki-markdown/default.nix b/pkgs/tools/misc/vimwiki-markdown/default.nix
index c1b1fce7abd..18adf99b9c9 100644
--- a/pkgs/tools/misc/vimwiki-markdown/default.nix
+++ b/pkgs/tools/misc/vimwiki-markdown/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonApplication
 , fetchPypi
 , markdown
diff --git a/pkgs/tools/misc/vivid/default.nix b/pkgs/tools/misc/vivid/default.nix
index dad352cc657..e131d8bd4e7 100644
--- a/pkgs/tools/misc/vivid/default.nix
+++ b/pkgs/tools/misc/vivid/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, rustPlatform }:
+{ lib, fetchFromGitHub, rustPlatform }:
 
 rustPlatform.buildRustPackage rec {
   pname = "vivid";
diff --git a/pkgs/tools/misc/void/default.nix b/pkgs/tools/misc/void/default.nix
index e6d36155732..18699e5911d 100644
--- a/pkgs/tools/misc/void/default.nix
+++ b/pkgs/tools/misc/void/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, rustPlatform }:
+{ lib, fetchFromGitHub, rustPlatform }:
 
 rustPlatform.buildRustPackage rec {
   pname = "void";
diff --git a/pkgs/tools/misc/wakatime/default.nix b/pkgs/tools/misc/wakatime/default.nix
index 75f46106209..e8bd12d567b 100644
--- a/pkgs/tools/misc/wakatime/default.nix
+++ b/pkgs/tools/misc/wakatime/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python3Packages, fetchFromGitHub, glibcLocales }:
+{ lib, python3Packages, fetchFromGitHub, glibcLocales }:
 
 with python3Packages;
 buildPythonApplication rec {
diff --git a/pkgs/tools/misc/xdxf2slob/default.nix b/pkgs/tools/misc/xdxf2slob/default.nix
index 8d4998a9ff9..b898aa2fc24 100644
--- a/pkgs/tools/misc/xdxf2slob/default.nix
+++ b/pkgs/tools/misc/xdxf2slob/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, python3Packages }:
+{ lib, fetchFromGitHub, python3Packages }:
 
 python3Packages.buildPythonApplication {
   name = "xdxf2slob-unstable-2015-06-30";
diff --git a/pkgs/tools/misc/xflux/gui.nix b/pkgs/tools/misc/xflux/gui.nix
index 378337f6232..16379820653 100644
--- a/pkgs/tools/misc/xflux/gui.nix
+++ b/pkgs/tools/misc/xflux/gui.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, buildPythonApplication, python3Packages, wrapGAppsHook
+{ lib, fetchFromGitHub, buildPythonApplication, python3Packages, wrapGAppsHook
 , xflux, librsvg, gtk3, gobject-introspection, pango, gdk-pixbuf, atk
 , pexpect, pyGtkGlade, pygobject3, pyxdg, libappindicator-gtk3
 }:
diff --git a/pkgs/tools/misc/xmonad-log/default.nix b/pkgs/tools/misc/xmonad-log/default.nix
index b8dd369cd6a..acd4a9e1d46 100644
--- a/pkgs/tools/misc/xmonad-log/default.nix
+++ b/pkgs/tools/misc/xmonad-log/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "xmonad-log";
diff --git a/pkgs/tools/misc/yle-dl/default.nix b/pkgs/tools/misc/yle-dl/default.nix
index 64568ca46b0..9ee81cd1b15 100644
--- a/pkgs/tools/misc/yle-dl/default.nix
+++ b/pkgs/tools/misc/yle-dl/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, rtmpdump, php, wget, python3Packages, ffmpeg_3 }:
+{ lib, fetchFromGitHub, rtmpdump, php, wget, python3Packages, ffmpeg_3 }:
 
 python3Packages.buildPythonApplication rec {
   pname = "yle-dl";
diff --git a/pkgs/tools/misc/you-get/default.nix b/pkgs/tools/misc/you-get/default.nix
index 54443083996..f58fb349c95 100644
--- a/pkgs/tools/misc/you-get/default.nix
+++ b/pkgs/tools/misc/you-get/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonApplication, fetchPypi }:
+{ lib, buildPythonApplication, fetchPypi }:
 
 buildPythonApplication rec {
   pname = "you-get";
diff --git a/pkgs/tools/misc/yubikey-neo-manager/default.nix b/pkgs/tools/misc/yubikey-neo-manager/default.nix
index eeb4f5c1bd5..3991b99fcdc 100644
--- a/pkgs/tools/misc/yubikey-neo-manager/default.nix
+++ b/pkgs/tools/misc/yubikey-neo-manager/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, python27Packages
+{ lib, fetchurl, python27Packages
 , libykneomgr, yubikey-personalization, libu2f-host }:
 
 python27Packages.buildPythonPackage rec {
diff --git a/pkgs/tools/misc/yubikey-personalization-gui/default.nix b/pkgs/tools/misc/yubikey-personalization-gui/default.nix
index 6934791da8e..af6843e3820 100644
--- a/pkgs/tools/misc/yubikey-personalization-gui/default.nix
+++ b/pkgs/tools/misc/yubikey-personalization-gui/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, mkDerivation, pkg-config, qtbase, qmake, imagemagick
+{ lib, fetchurl, mkDerivation, pkg-config, qtbase, qmake, imagemagick
 , libyubikey, yubikey-personalization }:
 
 mkDerivation rec {
diff --git a/pkgs/tools/misc/zabbixctl/default.nix b/pkgs/tools/misc/zabbixctl/default.nix
index 15add8ed191..81d81b6794e 100644
--- a/pkgs/tools/misc/zabbixctl/default.nix
+++ b/pkgs/tools/misc/zabbixctl/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "zabbixctl";
diff --git a/pkgs/tools/networking/assh/default.nix b/pkgs/tools/networking/assh/default.nix
index 13018d183ca..3995fc295d1 100644
--- a/pkgs/tools/networking/assh/default.nix
+++ b/pkgs/tools/networking/assh/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub, openssh, makeWrapper }:
+{ lib, buildGoModule, fetchFromGitHub, openssh, makeWrapper }:
 
 buildGoModule rec {
   pname = "assh";
diff --git a/pkgs/tools/networking/brook/default.nix b/pkgs/tools/networking/brook/default.nix
index f84176495aa..b6f7cb1869a 100644
--- a/pkgs/tools/networking/brook/default.nix
+++ b/pkgs/tools/networking/brook/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "brook";
diff --git a/pkgs/tools/networking/bukubrow/default.nix b/pkgs/tools/networking/bukubrow/default.nix
index 5188954b763..157720651f4 100644
--- a/pkgs/tools/networking/bukubrow/default.nix
+++ b/pkgs/tools/networking/bukubrow/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, rustPlatform, fetchFromGitHub, sqlite }: let
+{ lib, rustPlatform, fetchFromGitHub, sqlite }: let
 
 manifest = {
   description = "Bukubrow extension host application";
diff --git a/pkgs/tools/networking/circus/default.nix b/pkgs/tools/networking/circus/default.nix
index 891eb19c835..f24c0e629cb 100644
--- a/pkgs/tools/networking/circus/default.nix
+++ b/pkgs/tools/networking/circus/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python3 }:
+{ lib, python3 }:
 
 let
   python = python3.override {
diff --git a/pkgs/tools/networking/clash/default.nix b/pkgs/tools/networking/clash/default.nix
index 590fcf1dbaf..543c86db307 100644
--- a/pkgs/tools/networking/clash/default.nix
+++ b/pkgs/tools/networking/clash/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, buildGoModule }:
+{ lib, fetchFromGitHub, buildGoModule }:
 
 buildGoModule rec {
   pname = "clash";
diff --git a/pkgs/tools/networking/connman/connman-notify/default.nix b/pkgs/tools/networking/connman/connman-notify/default.nix
index 9f0c9873e2a..cbf50091303 100644
--- a/pkgs/tools/networking/connman/connman-notify/default.nix
+++ b/pkgs/tools/networking/connman/connman-notify/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitLab, python3Packages, glib, gobject-introspection, wrapGAppsHook }:
+{ lib, fetchFromGitLab, python3Packages, glib, gobject-introspection, wrapGAppsHook }:
 
 python3Packages.buildPythonApplication {
   pname = "connman-notify";
diff --git a/pkgs/tools/networking/corerad/default.nix b/pkgs/tools/networking/corerad/default.nix
index 64e8e09467d..a7e5026d83a 100644
--- a/pkgs/tools/networking/corerad/default.nix
+++ b/pkgs/tools/networking/corerad/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub, nixosTests }:
+{ lib, buildGoModule, fetchFromGitHub, nixosTests }:
 
 buildGoModule rec {
   pname = "corerad";
diff --git a/pkgs/tools/networking/croc/default.nix b/pkgs/tools/networking/croc/default.nix
index 92493ab109f..4a4578a7356 100644
--- a/pkgs/tools/networking/croc/default.nix
+++ b/pkgs/tools/networking/croc/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub, callPackage}:
+{ lib, buildGoModule, fetchFromGitHub, callPackage}:
 
 buildGoModule rec {
   pname = "croc";
diff --git a/pkgs/tools/networking/curl-unix-socket/default.nix b/pkgs/tools/networking/curl-unix-socket/default.nix
index 84b5c1861cd..ab4c3292ea5 100644
--- a/pkgs/tools/networking/curl-unix-socket/default.nix
+++ b/pkgs/tools/networking/curl-unix-socket/default.nix
@@ -1,4 +1,4 @@
-{ buildGoPackage, lib, stdenv, fetchFromGitHub }:
+{ buildGoPackage, lib, fetchFromGitHub }:
 
 buildGoPackage rec {
   name = "curl-unix-socket-2015-04-10";
diff --git a/pkgs/tools/networking/dd-agent/datadog-agent.nix b/pkgs/tools/networking/dd-agent/datadog-agent.nix
index d980d570226..ad37245d57c 100644
--- a/pkgs/tools/networking/dd-agent/datadog-agent.nix
+++ b/pkgs/tools/networking/dd-agent/datadog-agent.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, buildGoPackage, makeWrapper, pythonPackages, pkg-config, systemd, hostname, extraTags ? [] }:
+{ lib, fetchFromGitHub, buildGoPackage, makeWrapper, pythonPackages, pkg-config, systemd, hostname, extraTags ? [] }:
 
 let
   # keep this in sync with github.com/DataDog/agent-payload dependency
diff --git a/pkgs/tools/networking/dd-agent/datadog-process-agent.nix b/pkgs/tools/networking/dd-agent/datadog-process-agent.nix
index a77030bba93..e2c497dad40 100644
--- a/pkgs/tools/networking/dd-agent/datadog-process-agent.nix
+++ b/pkgs/tools/networking/dd-agent/datadog-process-agent.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, buildGoPackage  }:
+{ lib, fetchFromGitHub, buildGoPackage  }:
 
 buildGoPackage rec {
   pname = "datadog-process-agent";
diff --git a/pkgs/tools/networking/ddclient/default.nix b/pkgs/tools/networking/ddclient/default.nix
index 3b52c2be252..51454ac1197 100644
--- a/pkgs/tools/networking/ddclient/default.nix
+++ b/pkgs/tools/networking/ddclient/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, perlPackages, iproute, perl }:
+{ lib, fetchurl, perlPackages, iproute, perl }:
 
 perlPackages.buildPerlPackage rec {
   pname = "ddclient";
diff --git a/pkgs/tools/networking/dnscrypt-proxy2/default.nix b/pkgs/tools/networking/dnscrypt-proxy2/default.nix
index 3526562e11c..8aedb403260 100644
--- a/pkgs/tools/networking/dnscrypt-proxy2/default.nix
+++ b/pkgs/tools/networking/dnscrypt-proxy2/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "dnscrypt-proxy2";
diff --git a/pkgs/tools/networking/dnsproxy/default.nix b/pkgs/tools/networking/dnsproxy/default.nix
index a04244642ba..718606fdfa6 100644
--- a/pkgs/tools/networking/dnsproxy/default.nix
+++ b/pkgs/tools/networking/dnsproxy/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, buildGoModule }:
+{ lib, fetchFromGitHub, buildGoModule }:
 
 buildGoModule rec {
   pname = "dnsproxy";
diff --git a/pkgs/tools/networking/filegive/default.nix b/pkgs/tools/networking/filegive/default.nix
index 3ed250ca4bc..1d7bf884edd 100644
--- a/pkgs/tools/networking/filegive/default.nix
+++ b/pkgs/tools/networking/filegive/default.nix
@@ -1,4 +1,4 @@
-{ buildGoPackage, lib, stdenv, fetchurl }:
+{ buildGoPackage, lib, fetchurl }:
 
 buildGoPackage rec {
   name = "filegive-0.7.4";
diff --git a/pkgs/tools/networking/getmail/default.nix b/pkgs/tools/networking/getmail/default.nix
index d994d9d8cec..4e20cbe7441 100644
--- a/pkgs/tools/networking/getmail/default.nix
+++ b/pkgs/tools/networking/getmail/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, python2Packages }:
+{ lib, fetchurl, python2Packages }:
 
 python2Packages.buildPythonApplication rec {
   pname = "getmail";
diff --git a/pkgs/tools/networking/goklp/default.nix b/pkgs/tools/networking/goklp/default.nix
index 78117a700bd..10c5c8ea64f 100644
--- a/pkgs/tools/networking/goklp/default.nix
+++ b/pkgs/tools/networking/goklp/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "goklp";
diff --git a/pkgs/tools/networking/goreplay/default.nix b/pkgs/tools/networking/goreplay/default.nix
index 564c45d2e14..14d0a16366b 100644
--- a/pkgs/tools/networking/goreplay/default.nix
+++ b/pkgs/tools/networking/goreplay/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub, libpcap }:
+{ lib, buildGoPackage, fetchFromGitHub, libpcap }:
 
 buildGoPackage rec {
   pname = "goreplay";
diff --git a/pkgs/tools/networking/http-prompt/default.nix b/pkgs/tools/networking/http-prompt/default.nix
index 59a3bffdc6d..3732fbd879f 100644
--- a/pkgs/tools/networking/http-prompt/default.nix
+++ b/pkgs/tools/networking/http-prompt/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, python3Packages, httpie }:
+{ lib, fetchFromGitHub, python3Packages, httpie }:
 
 python3Packages.buildPythonApplication rec {
   pname = "http-prompt";
diff --git a/pkgs/tools/networking/httpie/default.nix b/pkgs/tools/networking/httpie/default.nix
index 66513819ab8..c5e12317fd7 100644
--- a/pkgs/tools/networking/httpie/default.nix
+++ b/pkgs/tools/networking/httpie/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, python3Packages, docutils, fetchpatch }:
+{ lib, fetchFromGitHub, python3Packages, docutils, fetchpatch }:
 
 python3Packages.buildPythonApplication rec {
   pname = "httpie";
diff --git a/pkgs/tools/networking/httplab/default.nix b/pkgs/tools/networking/httplab/default.nix
index 22dc500fd4c..40851d370c7 100644
--- a/pkgs/tools/networking/httplab/default.nix
+++ b/pkgs/tools/networking/httplab/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "httplab";
diff --git a/pkgs/tools/networking/httpstat/default.nix b/pkgs/tools/networking/httpstat/default.nix
index a8b9630aab2..27c2a145a65 100644
--- a/pkgs/tools/networking/httpstat/default.nix
+++ b/pkgs/tools/networking/httpstat/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, curl, pythonPackages, glibcLocales }:
+{ lib, fetchFromGitHub, curl, pythonPackages, glibcLocales }:
 
 pythonPackages.buildPythonApplication rec {
   pname = "httpstat";
diff --git a/pkgs/tools/networking/ipgrep/default.nix b/pkgs/tools/networking/ipgrep/default.nix
index dd85a5dcb61..d1f5316c27b 100644
--- a/pkgs/tools/networking/ipgrep/default.nix
+++ b/pkgs/tools/networking/ipgrep/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, python3Packages }:
+{ lib, fetchFromGitHub, python3Packages }:
 
 python3Packages.buildPythonApplication rec {
   version = "1.0.1";
diff --git a/pkgs/tools/networking/kail/default.nix b/pkgs/tools/networking/kail/default.nix
index 2ddcd6c7d4b..ae431b329ea 100644
--- a/pkgs/tools/networking/kail/default.nix
+++ b/pkgs/tools/networking/kail/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "kail";
diff --git a/pkgs/tools/networking/minio-client/default.nix b/pkgs/tools/networking/minio-client/default.nix
index 3145f85186b..9d667d0ee1d 100644
--- a/pkgs/tools/networking/minio-client/default.nix
+++ b/pkgs/tools/networking/minio-client/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "minio-client";
diff --git a/pkgs/tools/networking/offlineimap/default.nix b/pkgs/tools/networking/offlineimap/default.nix
index 698046358e3..0de96169769 100644
--- a/pkgs/tools/networking/offlineimap/default.nix
+++ b/pkgs/tools/networking/offlineimap/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, python2Packages,
+{ lib, fetchFromGitHub, python2Packages,
   asciidoc, cacert, libxml2, libxslt, docbook_xsl }:
 
 python2Packages.buildPythonApplication rec {
diff --git a/pkgs/tools/networking/persepolis/default.nix b/pkgs/tools/networking/persepolis/default.nix
index 2ebec34b219..5e4f0542d36 100644
--- a/pkgs/tools/networking/persepolis/default.nix
+++ b/pkgs/tools/networking/persepolis/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, buildPythonApplication, fetchFromGitHub, makeWrapper
+{ lib, buildPythonApplication, fetchFromGitHub, makeWrapper
 , aria
 , libnotify
 , pulseaudio
diff --git a/pkgs/tools/networking/photon/default.nix b/pkgs/tools/networking/photon/default.nix
index 55dedc09bea..d3f153e44ae 100644
--- a/pkgs/tools/networking/photon/default.nix
+++ b/pkgs/tools/networking/photon/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python3Packages, fetchFromGitHub }:
+{ lib, python3Packages, fetchFromGitHub }:
 
 python3Packages.buildPythonApplication rec {
   pname = "photon";
diff --git a/pkgs/tools/networking/pirate-get/default.nix b/pkgs/tools/networking/pirate-get/default.nix
index 76b77da1764..dc9133229af 100644
--- a/pkgs/tools/networking/pirate-get/default.nix
+++ b/pkgs/tools/networking/pirate-get/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python3Packages }:
+{ lib, python3Packages }:
 
 with python3Packages;
 
diff --git a/pkgs/tools/networking/pixiecore/default.nix b/pkgs/tools/networking/pixiecore/default.nix
index ec275c5e6a8..6155d411e13 100644
--- a/pkgs/tools/networking/pixiecore/default.nix
+++ b/pkgs/tools/networking/pixiecore/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "pixiecore";
diff --git a/pkgs/tools/networking/polysh/default.nix b/pkgs/tools/networking/polysh/default.nix
index 68cb8fed57a..69e5d0427e5 100644
--- a/pkgs/tools/networking/polysh/default.nix
+++ b/pkgs/tools/networking/polysh/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, python2Packages }:
+{ lib, fetchurl, python2Packages }:
 
 let
   inherit (python2Packages) buildPythonApplication;
diff --git a/pkgs/tools/networking/proxify/default.nix b/pkgs/tools/networking/proxify/default.nix
index 7f45d53d41d..6a0bfcc6ee2 100644
--- a/pkgs/tools/networking/proxify/default.nix
+++ b/pkgs/tools/networking/proxify/default.nix
@@ -1,6 +1,6 @@
 { buildGoModule
 , fetchFromGitHub
-, lib, stdenv
+, lib
 }:
 
 buildGoModule rec {
diff --git a/pkgs/tools/networking/pssh/default.nix b/pkgs/tools/networking/pssh/default.nix
index b2b08cea844..a17701644c8 100644
--- a/pkgs/tools/networking/pssh/default.nix
+++ b/pkgs/tools/networking/pssh/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, pythonPackages, openssh, rsync }:
+{ lib, fetchFromGitHub, pythonPackages, openssh, rsync }:
 
 pythonPackages.buildPythonApplication rec {
   pname = "pssh";
diff --git a/pkgs/tools/networking/pykms/default.nix b/pkgs/tools/networking/pykms/default.nix
index f856f591bf4..0d001e7aeef 100644
--- a/pkgs/tools/networking/pykms/default.nix
+++ b/pkgs/tools/networking/pykms/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, runtimeShell, fetchFromGitHub, python3, writeText, writeScript
+{ lib, runtimeShell, fetchFromGitHub, python3, writeText, writeScript
 , coreutils, sqlite }:
 
 with python3.pkgs;
diff --git a/pkgs/tools/networking/s3cmd/default.nix b/pkgs/tools/networking/s3cmd/default.nix
index 06f51b0c506..15f6ff3dfa0 100644
--- a/pkgs/tools/networking/s3cmd/default.nix
+++ b/pkgs/tools/networking/s3cmd/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonApplication, fetchFromGitHub, python_magic, dateutil }:
+{ lib, buildPythonApplication, fetchFromGitHub, python_magic, dateutil }:
 
 buildPythonApplication rec {
   pname = "s3cmd";
diff --git a/pkgs/tools/networking/s3gof3r/default.nix b/pkgs/tools/networking/s3gof3r/default.nix
index 390b35b0297..4623b68ad4c 100644
--- a/pkgs/tools/networking/s3gof3r/default.nix
+++ b/pkgs/tools/networking/s3gof3r/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchgit }:
+{ lib, buildGoPackage, fetchgit }:
 
 buildGoPackage rec {
   pname = "s3gof3r";
diff --git a/pkgs/tools/networking/s4cmd/default.nix b/pkgs/tools/networking/s4cmd/default.nix
index 80874649072..95dc02cb5cd 100644
--- a/pkgs/tools/networking/s4cmd/default.nix
+++ b/pkgs/tools/networking/s4cmd/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python3Packages }:
+{ lib, python3Packages }:
 
 python3Packages.buildPythonApplication rec {
   pname = "s4cmd";
diff --git a/pkgs/tools/networking/shadowfox/default.nix b/pkgs/tools/networking/shadowfox/default.nix
index c7507925f5f..e6b1c823eb8 100644
--- a/pkgs/tools/networking/shadowfox/default.nix
+++ b/pkgs/tools/networking/shadowfox/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, buildGoModule }:
+{ lib, fetchFromGitHub, buildGoModule }:
 
 buildGoModule rec {
   pname = "shadowfox";
diff --git a/pkgs/tools/networking/subfinder/default.nix b/pkgs/tools/networking/subfinder/default.nix
index 4474cba6aee..2844cc2dac0 100644
--- a/pkgs/tools/networking/subfinder/default.nix
+++ b/pkgs/tools/networking/subfinder/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "subfinder";
diff --git a/pkgs/tools/networking/tdns-cli/default.nix b/pkgs/tools/networking/tdns-cli/default.nix
index 0ed7922874d..9d786d60b12 100644
--- a/pkgs/tools/networking/tdns-cli/default.nix
+++ b/pkgs/tools/networking/tdns-cli/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, rustPlatform }:
+{ lib, fetchFromGitHub, rustPlatform }:
 
 rustPlatform.buildRustPackage rec {
   name = "tdns-cli";
diff --git a/pkgs/tools/networking/tendermint/default.nix b/pkgs/tools/networking/tendermint/default.nix
index bd280e75379..36269327e81 100644
--- a/pkgs/tools/networking/tendermint/default.nix
+++ b/pkgs/tools/networking/tendermint/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, buildGoModule }:
+{ lib, fetchFromGitHub, buildGoModule }:
 
 buildGoModule rec {
   pname = "tendermint";
diff --git a/pkgs/tools/networking/termshark/default.nix b/pkgs/tools/networking/termshark/default.nix
index f4e790fea36..65ba8d17bcb 100644
--- a/pkgs/tools/networking/termshark/default.nix
+++ b/pkgs/tools/networking/termshark/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, makeWrapper, buildGoModule, wireshark-cli }:
+{ lib, fetchFromGitHub, makeWrapper, buildGoModule, wireshark-cli }:
 
 buildGoModule rec {
   pname = "termshark";
diff --git a/pkgs/tools/networking/tox-node/default.nix b/pkgs/tools/networking/tox-node/default.nix
index 85fcea008de..3ef125382b6 100644
--- a/pkgs/tools/networking/tox-node/default.nix
+++ b/pkgs/tools/networking/tox-node/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, rustPlatform, fetchFromGitHub
+{ lib, rustPlatform, fetchFromGitHub
 , libsodium, openssl
 , pkg-config
 }:
diff --git a/pkgs/tools/networking/ua/default.nix b/pkgs/tools/networking/ua/default.nix
index 69bc3fc409b..feb17b283de 100644
--- a/pkgs/tools/networking/ua/default.nix
+++ b/pkgs/tools/networking/ua/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchgit
+{ lib, buildGoPackage, fetchgit
 , pkg-config
 , glib, libxml2
 }:
diff --git a/pkgs/tools/networking/urlwatch/default.nix b/pkgs/tools/networking/urlwatch/default.nix
index 10bbc963a28..1cea3989ed2 100644
--- a/pkgs/tools/networking/urlwatch/default.nix
+++ b/pkgs/tools/networking/urlwatch/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, python3Packages }:
+{ lib, fetchFromGitHub, python3Packages }:
 
 python3Packages.buildPythonApplication rec {
   pname = "urlwatch";
diff --git a/pkgs/tools/networking/waitron/default.nix b/pkgs/tools/networking/waitron/default.nix
index 7efe7018d31..8364cd5763d 100644
--- a/pkgs/tools/networking/waitron/default.nix
+++ b/pkgs/tools/networking/waitron/default.nix
@@ -1,5 +1,5 @@
 # This file was generated by https://github.com/kamilchm/go2nix v1.3.0
-{ lib, stdenv, buildGoPackage, fetchgit, fetchhg, fetchbzr, fetchsvn }:
+{ lib, buildGoPackage, fetchgit, fetchhg, fetchbzr, fetchsvn }:
 
 buildGoPackage rec {
   name = "waitron-unstable-${version}";
diff --git a/pkgs/tools/networking/wifite2/default.nix b/pkgs/tools/networking/wifite2/default.nix
index 3b1c3f14ac5..054b77f8c9b 100644
--- a/pkgs/tools/networking/wifite2/default.nix
+++ b/pkgs/tools/networking/wifite2/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, fetchFromGitHub, fetchpatch, python3, wirelesstools
+{ lib, fetchFromGitHub, fetchpatch, python3, wirelesstools
 , aircrack-ng, wireshark-cli, reaverwps-t6x, cowpatty, hashcat, hcxtools
 , hcxdumptool, pyrit, which }:
 
diff --git a/pkgs/tools/networking/wireguard-go/default.nix b/pkgs/tools/networking/wireguard-go/default.nix
index 100de62683d..35c5371113c 100644
--- a/pkgs/tools/networking/wireguard-go/default.nix
+++ b/pkgs/tools/networking/wireguard-go/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchzip }:
+{ lib, buildGoPackage, fetchzip }:
 
 buildGoPackage rec {
   pname = "wireguard-go";
diff --git a/pkgs/tools/networking/wormhole-william/default.nix b/pkgs/tools/networking/wormhole-william/default.nix
index 6476d4f43b1..48f842f60ce 100644
--- a/pkgs/tools/networking/wormhole-william/default.nix
+++ b/pkgs/tools/networking/wormhole-william/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "wormhole-william";
diff --git a/pkgs/tools/networking/wstunnel/default.nix b/pkgs/tools/networking/wstunnel/default.nix
index 161b08a7d39..a851dcd4ead 100644
--- a/pkgs/tools/networking/wstunnel/default.nix
+++ b/pkgs/tools/networking/wstunnel/default.nix
@@ -1,6 +1,6 @@
 { mkDerivation, async, base, base64-bytestring, binary, bytestring
 , classy-prelude, cmdargs, connection, hslogger, mtl, network
-, network-conduit-tls, stdenv, streaming-commons, text
+, network-conduit-tls, streaming-commons, text
 , unordered-containers, websockets
 , hspec, iproute
 , lib, fetchFromGitHub, fetchpatch
diff --git a/pkgs/tools/networking/wuzz/default.nix b/pkgs/tools/networking/wuzz/default.nix
index 73db27f1a94..156841be334 100644
--- a/pkgs/tools/networking/wuzz/default.nix
+++ b/pkgs/tools/networking/wuzz/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "wuzz";
diff --git a/pkgs/tools/networking/yrd/default.nix b/pkgs/tools/networking/yrd/default.nix
index 7f946718588..75a89b859fe 100644
--- a/pkgs/tools/networking/yrd/default.nix
+++ b/pkgs/tools/networking/yrd/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, pythonPackages }:
+{ lib, fetchFromGitHub, pythonPackages }:
 
 let
   pname = "yrd";
diff --git a/pkgs/tools/nix/cached-nix-shell/default.nix b/pkgs/tools/nix/cached-nix-shell/default.nix
index b495a302618..853bf87346f 100644
--- a/pkgs/tools/nix/cached-nix-shell/default.nix
+++ b/pkgs/tools/nix/cached-nix-shell/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, openssl, pkg-config, ronn, rustPlatform }:
+{ lib, fetchFromGitHub, openssl, pkg-config, ronn, rustPlatform }:
 
 let
   blake3-src = fetchFromGitHub {
diff --git a/pkgs/tools/nix/nar-serve/default.nix b/pkgs/tools/nix/nar-serve/default.nix
index 4b0239a2fa2..146165d880d 100644
--- a/pkgs/tools/nix/nar-serve/default.nix
+++ b/pkgs/tools/nix/nar-serve/default.nix
@@ -1,7 +1,7 @@
 { buildGoModule
 , fetchFromGitHub
 , lib
-, stdenv
+
 }:
 let
   pname = "nar-serve";
diff --git a/pkgs/tools/nix/nix-output-monitor/default.nix b/pkgs/tools/nix/nix-output-monitor/default.nix
index 38e2b060c0c..b177b9a233a 100644
--- a/pkgs/tools/nix/nix-output-monitor/default.nix
+++ b/pkgs/tools/nix/nix-output-monitor/default.nix
@@ -1,5 +1,5 @@
 { mkDerivation, ansi-terminal, async, attoparsec, base, containers
-, directory, HUnit, mtl, nix-derivation, process, relude, lib, stdenv
+, directory, HUnit, mtl, nix-derivation, process, relude, lib
 , stm, text, time, unix, fetchFromGitHub
 }:
 mkDerivation {
diff --git a/pkgs/tools/nix/nix-query-tree-viewer/default.nix b/pkgs/tools/nix/nix-query-tree-viewer/default.nix
index f820f36e49f..353aafa2a7e 100644
--- a/pkgs/tools/nix/nix-query-tree-viewer/default.nix
+++ b/pkgs/tools/nix/nix-query-tree-viewer/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, rustPlatform, glib, gtk3, wrapGAppsHook }:
+{ lib, fetchFromGitHub, rustPlatform, glib, gtk3, wrapGAppsHook }:
 
 rustPlatform.buildRustPackage rec {
   pname = "nix-query-tree-viewer";
diff --git a/pkgs/tools/package-management/cargo-kcov/default.nix b/pkgs/tools/package-management/cargo-kcov/default.nix
index 6b825919b60..8b2dbe3e489 100644
--- a/pkgs/tools/package-management/cargo-kcov/default.nix
+++ b/pkgs/tools/package-management/cargo-kcov/default.nix
@@ -1,5 +1,4 @@
-{ stdenv
-, lib
+{ lib
 , rustPlatform
 , fetchFromGitHub
 }:
diff --git a/pkgs/tools/package-management/gx/default.nix b/pkgs/tools/package-management/gx/default.nix
index 920b23f36ab..60fbdd4941f 100644
--- a/pkgs/tools/package-management/gx/default.nix
+++ b/pkgs/tools/package-management/gx/default.nix
@@ -1,5 +1,5 @@
 # This file was generated by go2nix.
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "gx";
diff --git a/pkgs/tools/package-management/gx/go/default.nix b/pkgs/tools/package-management/gx/go/default.nix
index dd14976e633..ad4435c9e2d 100644
--- a/pkgs/tools/package-management/gx/go/default.nix
+++ b/pkgs/tools/package-management/gx/go/default.nix
@@ -1,5 +1,5 @@
 # This file was generated by go2nix.
-{ lib, stdenv, buildGoPackage, fetchFromGitHub
+{ lib, buildGoPackage, fetchFromGitHub
 , gx
 }:
 
diff --git a/pkgs/tools/package-management/mynewt-newt/default.nix b/pkgs/tools/package-management/mynewt-newt/default.nix
index 2390c33ca03..dd5c36019f2 100644
--- a/pkgs/tools/package-management/mynewt-newt/default.nix
+++ b/pkgs/tools/package-management/mynewt-newt/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub, fetchpatch }:
+{ lib, buildGoModule, fetchFromGitHub, fetchpatch }:
 
 buildGoModule rec {
   pname = "mynewt-newt";
diff --git a/pkgs/tools/package-management/nix-doc/default.nix b/pkgs/tools/package-management/nix-doc/default.nix
index 66691d9f5c5..695cd2976d8 100644
--- a/pkgs/tools/package-management/nix-doc/default.nix
+++ b/pkgs/tools/package-management/nix-doc/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, rustPlatform, fetchFromGitHub, boost, nix, pkg-config }:
+{ lib, rustPlatform, fetchFromGitHub, boost, nix, pkg-config }:
 
 rustPlatform.buildRustPackage rec {
   pname = "nix-doc";
diff --git a/pkgs/tools/package-management/nix-simple-deploy/default.nix b/pkgs/tools/package-management/nix-simple-deploy/default.nix
index 47734f73fd6..91f9a39514b 100644
--- a/pkgs/tools/package-management/nix-simple-deploy/default.nix
+++ b/pkgs/tools/package-management/nix-simple-deploy/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, rustPlatform }:
+{ lib, fetchFromGitHub, rustPlatform }:
 
 rustPlatform.buildRustPackage rec {
   pname = "nix-simple-deploy";
diff --git a/pkgs/tools/package-management/nixpkgs-review/default.nix b/pkgs/tools/package-management/nixpkgs-review/default.nix
index b1a86f3137e..d3fcac6277f 100644
--- a/pkgs/tools/package-management/nixpkgs-review/default.nix
+++ b/pkgs/tools/package-management/nixpkgs-review/default.nix
@@ -1,9 +1,8 @@
-{ stdenv
+{ lib
 , python3
 , fetchFromGitHub
 , nixFlakes
 , git
-, lib
 }:
 
 python3.pkgs.buildPythonApplication rec {
diff --git a/pkgs/tools/package-management/python2nix/default.nix b/pkgs/tools/package-management/python2nix/default.nix
index 3cce599c052..b6ffe9abc02 100644
--- a/pkgs/tools/package-management/python2nix/default.nix
+++ b/pkgs/tools/package-management/python2nix/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, pythonPackages }:
+{ lib, fetchFromGitHub, pythonPackages }:
 
 pythonPackages.buildPythonApplication {
   name = "python2nix-20140927";
diff --git a/pkgs/tools/security/2fa/default.nix b/pkgs/tools/security/2fa/default.nix
index c8518ef0a9f..b06454e736c 100644
--- a/pkgs/tools/security/2fa/default.nix
+++ b/pkgs/tools/security/2fa/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   version = "1.2.0";
diff --git a/pkgs/tools/security/aws-iam-authenticator/default.nix b/pkgs/tools/security/aws-iam-authenticator/default.nix
index 851eed43ade..e0499681848 100644
--- a/pkgs/tools/security/aws-iam-authenticator/default.nix
+++ b/pkgs/tools/security/aws-iam-authenticator/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "aws-iam-authenticator";
diff --git a/pkgs/tools/security/aws-okta/default.nix b/pkgs/tools/security/aws-okta/default.nix
index 73d95f52b8c..08508dd157a 100644
--- a/pkgs/tools/security/aws-okta/default.nix
+++ b/pkgs/tools/security/aws-okta/default.nix
@@ -1,4 +1,4 @@
-{ buildGoPackage, fetchFromGitHub, libusb1, pkg-config, lib, stdenv, libiconv }:
+{ buildGoPackage, fetchFromGitHub, libusb1, pkg-config, lib, libiconv }:
 
 buildGoPackage rec {
   pname = "aws-okta";
diff --git a/pkgs/tools/security/certmgr/default.nix b/pkgs/tools/security/certmgr/default.nix
index 47848b25b43..e2318c853f1 100644
--- a/pkgs/tools/security/certmgr/default.nix
+++ b/pkgs/tools/security/certmgr/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub, fetchpatch }:
+{ lib, buildGoPackage, fetchFromGitHub, fetchpatch }:
 
 let
   generic = { patches ? [] }:
diff --git a/pkgs/tools/security/certstrap/default.nix b/pkgs/tools/security/certstrap/default.nix
index f0c756f54f9..ff6522f1d35 100644
--- a/pkgs/tools/security/certstrap/default.nix
+++ b/pkgs/tools/security/certstrap/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "certstrap";
diff --git a/pkgs/tools/security/cfssl/default.nix b/pkgs/tools/security/cfssl/default.nix
index 835c5daa72c..e92fe7b951f 100644
--- a/pkgs/tools/security/cfssl/default.nix
+++ b/pkgs/tools/security/cfssl/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub, go-rice }:
+{ lib, buildGoModule, fetchFromGitHub, go-rice }:
 
 buildGoModule rec {
   pname = "cfssl";
diff --git a/pkgs/tools/security/chrome-token-signing/default.nix b/pkgs/tools/security/chrome-token-signing/default.nix
index 4966c6412ab..5c2e6b4de15 100644
--- a/pkgs/tools/security/chrome-token-signing/default.nix
+++ b/pkgs/tools/security/chrome-token-signing/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, mkDerivation, fetchFromGitHub, qmake, pcsclite, pkg-config, opensc }:
+{ lib, mkDerivation, fetchFromGitHub, qmake, pcsclite, pkg-config, opensc }:
 
 mkDerivation rec {
   pname = "chrome-token-signing";
diff --git a/pkgs/tools/security/cloudbrute/default.nix b/pkgs/tools/security/cloudbrute/default.nix
index 06f0dd413a5..84a59ec495f 100644
--- a/pkgs/tools/security/cloudbrute/default.nix
+++ b/pkgs/tools/security/cloudbrute/default.nix
@@ -1,6 +1,6 @@
 { buildGoModule
 , fetchFromGitHub
-, lib, stdenv
+, lib
 }:
 
 buildGoModule rec {
diff --git a/pkgs/tools/security/creddump/default.nix b/pkgs/tools/security/creddump/default.nix
index 7a936408433..e9e5685acf4 100644
--- a/pkgs/tools/security/creddump/default.nix
+++ b/pkgs/tools/security/creddump/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitLab, python2, python2Packages }:
+{ lib, fetchFromGitLab, python2, python2Packages }:
 
 python2Packages.buildPythonApplication rec {
   pname = "creddump";
diff --git a/pkgs/tools/security/crlfuzz/default.nix b/pkgs/tools/security/crlfuzz/default.nix
index feddd893cec..88bd45bb5e1 100644
--- a/pkgs/tools/security/crlfuzz/default.nix
+++ b/pkgs/tools/security/crlfuzz/default.nix
@@ -1,6 +1,6 @@
 { buildGoModule
 , fetchFromGitHub
-, lib, stdenv
+, lib
 }:
 
 buildGoModule rec {
diff --git a/pkgs/tools/security/crowbar/default.nix b/pkgs/tools/security/crowbar/default.nix
index 2f197421e1f..e58f77457de 100644
--- a/pkgs/tools/security/crowbar/default.nix
+++ b/pkgs/tools/security/crowbar/default.nix
@@ -3,7 +3,7 @@
 , nmap
 , openvpn
 , python3Packages
-, lib, stdenv
+, lib
 , tigervnc
 }:
 
diff --git a/pkgs/tools/security/deepsea/default.nix b/pkgs/tools/security/deepsea/default.nix
index 855549bb0c8..e351eb7a79d 100644
--- a/pkgs/tools/security/deepsea/default.nix
+++ b/pkgs/tools/security/deepsea/default.nix
@@ -1,6 +1,6 @@
 { buildGoModule
 , fetchFromGitHub
-, lib, stdenv
+, lib
 }:
 
 buildGoModule rec {
diff --git a/pkgs/tools/security/dnsrecon/default.nix b/pkgs/tools/security/dnsrecon/default.nix
index 65b18c5c822..5eda4e75f94 100644
--- a/pkgs/tools/security/dnsrecon/default.nix
+++ b/pkgs/tools/security/dnsrecon/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, python3 }:
+{ lib, fetchFromGitHub, python3 }:
 
 python3.pkgs.buildPythonApplication rec {
   pname = "dnsrecon";
diff --git a/pkgs/tools/security/dnsx/default.nix b/pkgs/tools/security/dnsx/default.nix
index 1a82467201d..35f033cb983 100644
--- a/pkgs/tools/security/dnsx/default.nix
+++ b/pkgs/tools/security/dnsx/default.nix
@@ -1,6 +1,6 @@
 { buildGoModule
 , fetchFromGitHub
-, lib, stdenv
+, lib
 }:
 
 buildGoModule rec {
diff --git a/pkgs/tools/security/ffuf/default.nix b/pkgs/tools/security/ffuf/default.nix
index 084601a4122..46995e28441 100644
--- a/pkgs/tools/security/ffuf/default.nix
+++ b/pkgs/tools/security/ffuf/default.nix
@@ -1,6 +1,6 @@
 { buildGoModule
 , fetchFromGitHub
-, lib, stdenv
+, lib
 }:
 
 buildGoModule rec {
diff --git a/pkgs/tools/security/fido2luks/default.nix b/pkgs/tools/security/fido2luks/default.nix
index e0dcdadb7b0..f8c5b4a9f12 100644
--- a/pkgs/tools/security/fido2luks/default.nix
+++ b/pkgs/tools/security/fido2luks/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , rustPlatform
 , fetchFromGitHub
 , cryptsetup
diff --git a/pkgs/tools/security/fierce/default.nix b/pkgs/tools/security/fierce/default.nix
index 3d6472cbb44..797a2db211b 100644
--- a/pkgs/tools/security/fierce/default.nix
+++ b/pkgs/tools/security/fierce/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, python3 }:
+{ lib, fetchFromGitHub, python3 }:
 
 python3.pkgs.buildPythonApplication rec {
   pname = "fierce";
diff --git a/pkgs/tools/security/gau/default.nix b/pkgs/tools/security/gau/default.nix
index 98045a107e5..46498e49cff 100644
--- a/pkgs/tools/security/gau/default.nix
+++ b/pkgs/tools/security/gau/default.nix
@@ -1,6 +1,6 @@
 { buildGoModule
 , fetchFromGitHub
-, lib, stdenv
+, lib
 }:
 
 buildGoModule rec {
diff --git a/pkgs/tools/security/gnome-keysign/default.nix b/pkgs/tools/security/gnome-keysign/default.nix
index db0e88a805b..a94be8295ea 100644
--- a/pkgs/tools/security/gnome-keysign/default.nix
+++ b/pkgs/tools/security/gnome-keysign/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , fetchFromGitLab
 , fetchpatch
 , python3
diff --git a/pkgs/tools/security/gospider/default.nix b/pkgs/tools/security/gospider/default.nix
index f32ecdc94e6..f4b750d394a 100644
--- a/pkgs/tools/security/gospider/default.nix
+++ b/pkgs/tools/security/gospider/default.nix
@@ -1,6 +1,6 @@
 { buildGoModule
 , fetchFromGitHub
-, lib, stdenv
+, lib
 }:
 
 buildGoModule rec {
diff --git a/pkgs/tools/security/grype/default.nix b/pkgs/tools/security/grype/default.nix
index 49530213985..ac896c4d55b 100644
--- a/pkgs/tools/security/grype/default.nix
+++ b/pkgs/tools/security/grype/default.nix
@@ -1,7 +1,7 @@
 { buildGoModule
 , docker
 , fetchFromGitHub
-, lib, stdenv
+, lib
 }:
 
 buildGoModule rec {
diff --git a/pkgs/tools/security/hologram/default.nix b/pkgs/tools/security/hologram/default.nix
index 6ec4d7776e1..9c1c896d889 100644
--- a/pkgs/tools/security/hologram/default.nix
+++ b/pkgs/tools/security/hologram/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   name = "hologram-2018-03-19";
diff --git a/pkgs/tools/security/httpx/default.nix b/pkgs/tools/security/httpx/default.nix
index 7135baab375..bff9e03bc6f 100644
--- a/pkgs/tools/security/httpx/default.nix
+++ b/pkgs/tools/security/httpx/default.nix
@@ -1,6 +1,6 @@
 { buildGoModule
 , fetchFromGitHub
-, lib, stdenv
+, lib
 }:
 
 buildGoModule rec {
diff --git a/pkgs/tools/security/keybase/kbfs.nix b/pkgs/tools/security/keybase/kbfs.nix
index 6916d6b99bd..67abb57394c 100644
--- a/pkgs/tools/security/keybase/kbfs.nix
+++ b/pkgs/tools/security/keybase/kbfs.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub, keybase }:
+{ lib, buildGoPackage, fetchFromGitHub, keybase }:
 
 buildGoPackage {
   pname = "kbfs";
diff --git a/pkgs/tools/security/knockknock/default.nix b/pkgs/tools/security/knockknock/default.nix
index 7a00f183f15..960667e72de 100644
--- a/pkgs/tools/security/knockknock/default.nix
+++ b/pkgs/tools/security/knockknock/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, python2Packages, hping }:
+{ lib, fetchFromGitHub, python2Packages, hping }:
 let
   rev  = "bf14bbff";
 in python2Packages.buildPythonApplication rec {
diff --git a/pkgs/tools/security/lesspass-cli/default.nix b/pkgs/tools/security/lesspass-cli/default.nix
index 20473d1003e..ce64b6847fe 100644
--- a/pkgs/tools/security/lesspass-cli/default.nix
+++ b/pkgs/tools/security/lesspass-cli/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python3, fetchFromGitHub }:
+{ lib, python3, fetchFromGitHub }:
 
 let
   inherit (python3.pkgs) buildPythonApplication pytest mock pexpect;
diff --git a/pkgs/tools/security/notary/default.nix b/pkgs/tools/security/notary/default.nix
index fa3db0c3623..ab6ec0b1681 100644
--- a/pkgs/tools/security/notary/default.nix
+++ b/pkgs/tools/security/notary/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, buildGoPackage, libtool }:
+{ lib, fetchFromGitHub, buildGoPackage, libtool }:
 
 buildGoPackage rec {
   pname = "notary";
diff --git a/pkgs/tools/security/nuclei/default.nix b/pkgs/tools/security/nuclei/default.nix
index 7e9d3d52e56..2df24e63d89 100644
--- a/pkgs/tools/security/nuclei/default.nix
+++ b/pkgs/tools/security/nuclei/default.nix
@@ -1,6 +1,6 @@
 { buildGoModule
 , fetchFromGitHub
-, lib, stdenv
+, lib
 }:
 
 buildGoModule rec {
diff --git a/pkgs/tools/security/onioncircuits/default.nix b/pkgs/tools/security/onioncircuits/default.nix
index bdaf087004a..8c5083ee8af 100644
--- a/pkgs/tools/security/onioncircuits/default.nix
+++ b/pkgs/tools/security/onioncircuits/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchgit, python3, intltool, gtk3, gobject-introspection, gnome3 }:
+{ lib, fetchgit, python3, intltool, gtk3, gobject-introspection, gnome3 }:
 
 python3.pkgs.buildPythonApplication rec {
   pname = "onioncircuits";
diff --git a/pkgs/tools/security/pius/default.nix b/pkgs/tools/security/pius/default.nix
index 7d038a1aeab..3612caa196c 100644
--- a/pkgs/tools/security/pius/default.nix
+++ b/pkgs/tools/security/pius/default.nix
@@ -1,4 +1,4 @@
-{ fetchFromGitHub, lib, stdenv, python3Packages, gnupg, perl }:
+{ fetchFromGitHub, lib, python3Packages, gnupg, perl }:
 
 let version = "3.0.0"; in
 python3Packages.buildPythonApplication {
diff --git a/pkgs/tools/security/pyrit/default.nix b/pkgs/tools/security/pyrit/default.nix
index ead55036425..dc1d0b97f87 100644
--- a/pkgs/tools/security/pyrit/default.nix
+++ b/pkgs/tools/security/pyrit/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, fetchFromGitHub, python2Packages, openssl, zlib, libpcap, opencl-headers, ocl-icd }:
+{ lib, fetchFromGitHub, python2Packages, openssl, zlib, libpcap, opencl-headers, ocl-icd }:
 
 let
   version = "2019-12-13";
diff --git a/pkgs/tools/security/qdigidoc/default.nix b/pkgs/tools/security/qdigidoc/default.nix
index 2b769ee0a15..8ba6937c448 100644
--- a/pkgs/tools/security/qdigidoc/default.nix
+++ b/pkgs/tools/security/qdigidoc/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, mkDerivation, fetchgit, fetchurl, cmake, darkhttpd, gettext, makeWrapper, pkg-config
+{ lib, mkDerivation, fetchgit, fetchurl, cmake, darkhttpd, gettext, makeWrapper, pkg-config
 , libdigidocpp, opensc, openldap, openssl, pcsclite, qtbase, qttranslations, qtsvg }:
 
 mkDerivation rec {
diff --git a/pkgs/tools/security/safe/default.nix b/pkgs/tools/security/safe/default.nix
index 2f0f4501fd2..503cfbd9e86 100644
--- a/pkgs/tools/security/safe/default.nix
+++ b/pkgs/tools/security/safe/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildGoPackage
 , fetchFromGitHub
 }:
diff --git a/pkgs/tools/security/saml2aws/default.nix b/pkgs/tools/security/saml2aws/default.nix
index ade299ec589..57a92ef4b99 100644
--- a/pkgs/tools/security/saml2aws/default.nix
+++ b/pkgs/tools/security/saml2aws/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "saml2aws";
diff --git a/pkgs/tools/security/sops/default.nix b/pkgs/tools/security/sops/default.nix
index 9eddc308a4f..ae6f000fe3f 100644
--- a/pkgs/tools/security/sops/default.nix
+++ b/pkgs/tools/security/sops/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "sops";
diff --git a/pkgs/tools/security/subjs/default.nix b/pkgs/tools/security/subjs/default.nix
index 5b9a237d49c..1b7986c0a77 100644
--- a/pkgs/tools/security/subjs/default.nix
+++ b/pkgs/tools/security/subjs/default.nix
@@ -1,6 +1,6 @@
 { buildGoModule
 , fetchFromGitHub
-, lib, stdenv
+, lib
 }:
 
 buildGoModule rec {
diff --git a/pkgs/tools/security/sudolikeaboss/default.nix b/pkgs/tools/security/sudolikeaboss/default.nix
index bdaf8f129d0..53f99636b45 100644
--- a/pkgs/tools/security/sudolikeaboss/default.nix
+++ b/pkgs/tools/security/sudolikeaboss/default.nix
@@ -1,5 +1,5 @@
 # This file was generated by go2nix, then modified by hand for Darwin support.
-{ lib, stdenv, buildGoPackage, fetchFromGitHub, darwin }:
+{ lib, buildGoPackage, fetchFromGitHub, darwin }:
 
 buildGoPackage rec {
   pname = "sudolikeaboss-unstable";
diff --git a/pkgs/tools/security/teler/default.nix b/pkgs/tools/security/teler/default.nix
index 1acb9e5609e..4a971243ad1 100644
--- a/pkgs/tools/security/teler/default.nix
+++ b/pkgs/tools/security/teler/default.nix
@@ -1,6 +1,6 @@
 { buildGoModule
 , fetchFromGitHub
-, lib, stdenv
+, lib
 }:
 
 buildGoModule rec {
diff --git a/pkgs/tools/security/urlhunter/default.nix b/pkgs/tools/security/urlhunter/default.nix
index 3364b622ad6..ebc628e563c 100644
--- a/pkgs/tools/security/urlhunter/default.nix
+++ b/pkgs/tools/security/urlhunter/default.nix
@@ -1,6 +1,6 @@
 { buildGoModule
 , fetchFromGitHub
-, lib, stdenv
+, lib
 }:
 
 buildGoModule rec {
diff --git a/pkgs/tools/security/vault/default.nix b/pkgs/tools/security/vault/default.nix
index 3af00b9a22b..4d9893e103f 100644
--- a/pkgs/tools/security/vault/default.nix
+++ b/pkgs/tools/security/vault/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, buildGoPackage, installShellFiles, nixosTests }:
+{ lib, fetchFromGitHub, buildGoPackage, installShellFiles, nixosTests }:
 
 buildGoPackage rec {
   pname = "vault";
diff --git a/pkgs/tools/security/volatility/default.nix b/pkgs/tools/security/volatility/default.nix
index 80cd0d971a3..6cc5ddbfb4c 100644
--- a/pkgs/tools/security/volatility/default.nix
+++ b/pkgs/tools/security/volatility/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, pythonPackages }:
+{ lib, fetchFromGitHub, pythonPackages }:
 
 pythonPackages.buildPythonApplication rec {
   pname = "volatility";
diff --git a/pkgs/tools/security/vulnix/default.nix b/pkgs/tools/security/vulnix/default.nix
index e95adf3e1e6..a7ce0fb4b6e 100644
--- a/pkgs/tools/security/vulnix/default.nix
+++ b/pkgs/tools/security/vulnix/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , python3Packages
 , nix
 , ronn
diff --git a/pkgs/tools/system/auto-cpufreq/default.nix b/pkgs/tools/system/auto-cpufreq/default.nix
index 5a94cff19e1..b4bef5fc5e3 100644
--- a/pkgs/tools/system/auto-cpufreq/default.nix
+++ b/pkgs/tools/system/auto-cpufreq/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python3Packages, fetchFromGitHub }:
+{ lib, python3Packages, fetchFromGitHub }:
 
 python3Packages.buildPythonPackage rec {
   pname = "auto-cpufreq";
diff --git a/pkgs/tools/system/awstats/default.nix b/pkgs/tools/system/awstats/default.nix
index b04532d842f..88162780cb7 100644
--- a/pkgs/tools/system/awstats/default.nix
+++ b/pkgs/tools/system/awstats/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, perlPackages, jdk }:
+{ lib, fetchurl, perlPackages, jdk }:
 
 perlPackages.buildPerlPackage rec {
   pname = "awstats";
diff --git a/pkgs/tools/system/cm-rgb/default.nix b/pkgs/tools/system/cm-rgb/default.nix
index 9c75fe78c99..47fdba50c5e 100644
--- a/pkgs/tools/system/cm-rgb/default.nix
+++ b/pkgs/tools/system/cm-rgb/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonApplication
 , fetchFromGitHub
 , atk
diff --git a/pkgs/tools/system/consul-template/default.nix b/pkgs/tools/system/consul-template/default.nix
index 7604584e167..a285c720eaa 100644
--- a/pkgs/tools/system/consul-template/default.nix
+++ b/pkgs/tools/system/consul-template/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "consul-template";
diff --git a/pkgs/tools/system/envconsul/default.nix b/pkgs/tools/system/envconsul/default.nix
index 1706b32449e..9e8180b318a 100644
--- a/pkgs/tools/system/envconsul/default.nix
+++ b/pkgs/tools/system/envconsul/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "envconsul";
diff --git a/pkgs/tools/system/gdu/default.nix b/pkgs/tools/system/gdu/default.nix
index 53e69cd8cd6..0ade0443dc0 100644
--- a/pkgs/tools/system/gdu/default.nix
+++ b/pkgs/tools/system/gdu/default.nix
@@ -1,5 +1,5 @@
 { lib
-, stdenv
+
 , buildGoModule
 , fetchFromGitHub
 , installShellFiles
diff --git a/pkgs/tools/system/gotop/default.nix b/pkgs/tools/system/gotop/default.nix
index b49307f500f..3acace9eaae 100644
--- a/pkgs/tools/system/gotop/default.nix
+++ b/pkgs/tools/system/gotop/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "gotop";
diff --git a/pkgs/tools/system/honcho/default.nix b/pkgs/tools/system/honcho/default.nix
index f39c7dd793c..b653f240724 100644
--- a/pkgs/tools/system/honcho/default.nix
+++ b/pkgs/tools/system/honcho/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, pythonPackages }:
+{ lib, fetchFromGitHub, pythonPackages }:
 
 let
   inherit (pythonPackages) python;
diff --git a/pkgs/tools/system/journalwatch/default.nix b/pkgs/tools/system/journalwatch/default.nix
index 0ec7ef36623..3d85d13149c 100644
--- a/pkgs/tools/system/journalwatch/default.nix
+++ b/pkgs/tools/system/journalwatch/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub, pythonOlder, systemd, pytest }:
+{ lib, buildPythonPackage, fetchFromGitHub, pythonOlder, systemd, pytest }:
 
 buildPythonPackage rec {
   pname = "journalwatch";
diff --git a/pkgs/tools/system/localtime/default.nix b/pkgs/tools/system/localtime/default.nix
index 99e0674016b..798e3b3e883 100644
--- a/pkgs/tools/system/localtime/default.nix
+++ b/pkgs/tools/system/localtime/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, buildGoPackage, m4 }:
+{ lib, fetchFromGitHub, buildGoPackage, m4 }:
 
 buildGoPackage rec {
   name = "localtime-2017-11-07";
diff --git a/pkgs/tools/system/pcstat/default.nix b/pkgs/tools/system/pcstat/default.nix
index 9e0f6fe147e..d01b08a1434 100644
--- a/pkgs/tools/system/pcstat/default.nix
+++ b/pkgs/tools/system/pcstat/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage {
   pname = "pcstat-unstable";
diff --git a/pkgs/tools/system/ps_mem/default.nix b/pkgs/tools/system/ps_mem/default.nix
index dcca1a86da7..152bb1150e5 100644
--- a/pkgs/tools/system/ps_mem/default.nix
+++ b/pkgs/tools/system/ps_mem/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, pythonPackages, fetchFromGitHub }:
+{ lib, pythonPackages, fetchFromGitHub }:
 
 let
   version = "3.13";
diff --git a/pkgs/tools/system/s-tui/default.nix b/pkgs/tools/system/s-tui/default.nix
index 51c47ab1050..3943a8f4eef 100644
--- a/pkgs/tools/system/s-tui/default.nix
+++ b/pkgs/tools/system/s-tui/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python3Packages }:
+{ lib, python3Packages }:
 
 python3Packages.buildPythonPackage rec {
   pname = "s-tui";
diff --git a/pkgs/tools/system/s6-rc/default.nix b/pkgs/tools/system/s6-rc/default.nix
index 30467926f5d..20c23e15051 100644
--- a/pkgs/tools/system/s6-rc/default.nix
+++ b/pkgs/tools/system/s6-rc/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, skawarePackages }:
+{ lib, skawarePackages }:
 
 with skawarePackages;
 
diff --git a/pkgs/tools/system/systemd-journal2gelf/default.nix b/pkgs/tools/system/systemd-journal2gelf/default.nix
index 7ac5d7cf210..62a7c9d8aea 100644
--- a/pkgs/tools/system/systemd-journal2gelf/default.nix
+++ b/pkgs/tools/system/systemd-journal2gelf/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "SystemdJournal2Gelf-unstable";
diff --git a/pkgs/tools/system/tre-command/default.nix b/pkgs/tools/system/tre-command/default.nix
index 5a2ad41c744..638caa3c62b 100644
--- a/pkgs/tools/system/tre-command/default.nix
+++ b/pkgs/tools/system/tre-command/default.nix
@@ -1,4 +1,4 @@
-{ rustPlatform, fetchFromGitHub, lib, stdenv, installShellFiles }:
+{ rustPlatform, fetchFromGitHub, lib, installShellFiles }:
 
 rustPlatform.buildRustPackage rec {
   pname = "tre-command";
diff --git a/pkgs/tools/text/angle-grinder/default.nix b/pkgs/tools/text/angle-grinder/default.nix
index 82ca3ff0f60..66441d73713 100644
--- a/pkgs/tools/text/angle-grinder/default.nix
+++ b/pkgs/tools/text/angle-grinder/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , fetchFromGitHub
 , rustPlatform
 }:
diff --git a/pkgs/tools/text/choose/default.nix b/pkgs/tools/text/choose/default.nix
index 20d651df008..7816f79649c 100644
--- a/pkgs/tools/text/choose/default.nix
+++ b/pkgs/tools/text/choose/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , fetchFromGitHub
 , rustPlatform
 }:
diff --git a/pkgs/tools/text/codesearch/default.nix b/pkgs/tools/text/codesearch/default.nix
index bdb273de372..9c3e9fbd840 100644
--- a/pkgs/tools/text/codesearch/default.nix
+++ b/pkgs/tools/text/codesearch/default.nix
@@ -1,5 +1,5 @@
 # This file was generated by go2nix.
-{ lib, stdenv, buildGoPackage, fetchgit }:
+{ lib, buildGoPackage, fetchgit }:
 
 buildGoPackage rec {
   pname = "codesearch";
diff --git a/pkgs/tools/text/fanficfare/default.nix b/pkgs/tools/text/fanficfare/default.nix
index ad92ffa9350..e1db7d3d39c 100644
--- a/pkgs/tools/text/fanficfare/default.nix
+++ b/pkgs/tools/text/fanficfare/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python3Packages }:
+{ lib, python3Packages }:
 
 python3Packages.buildPythonApplication rec {
   pname = "FanFicFare";
diff --git a/pkgs/tools/text/gjo/default.nix b/pkgs/tools/text/gjo/default.nix
index 27dcf633fe7..0ab9a54c47b 100644
--- a/pkgs/tools/text/gjo/default.nix
+++ b/pkgs/tools/text/gjo/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildGoModule
 , fetchFromGitHub
 }:
diff --git a/pkgs/tools/text/grin/default.nix b/pkgs/tools/text/grin/default.nix
index dd3568ef0bb..5d89619001b 100644
--- a/pkgs/tools/text/grin/default.nix
+++ b/pkgs/tools/text/grin/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, python2Packages }:
+{ lib, fetchFromGitHub, python2Packages }:
 
 python2Packages.buildPythonApplication rec {
   program = "grin";
diff --git a/pkgs/tools/text/gucci/default.nix b/pkgs/tools/text/gucci/default.nix
index 4e938787ff4..943b86d3b05 100644
--- a/pkgs/tools/text/gucci/default.nix
+++ b/pkgs/tools/text/gucci/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "gucci";
diff --git a/pkgs/tools/text/icdiff/default.nix b/pkgs/tools/text/icdiff/default.nix
index 07082c4c56f..3ead56298cf 100644
--- a/pkgs/tools/text/icdiff/default.nix
+++ b/pkgs/tools/text/icdiff/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, pythonPackages }:
+{ lib, fetchFromGitHub, pythonPackages }:
 
 pythonPackages.buildPythonApplication rec {
   pname = "icdiff";
diff --git a/pkgs/tools/text/invoice2data/default.nix b/pkgs/tools/text/invoice2data/default.nix
index 87f3f3daff3..8007724f4a5 100644
--- a/pkgs/tools/text/invoice2data/default.nix
+++ b/pkgs/tools/text/invoice2data/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python3Packages, xpdf, imagemagick, tesseract }:
+{ lib, python3Packages, xpdf, imagemagick, tesseract }:
 
 python3Packages.buildPythonPackage rec {
   pname = "invoice2data";
diff --git a/pkgs/tools/text/markdown-pp/default.nix b/pkgs/tools/text/markdown-pp/default.nix
index 55febe11729..50ef560f6c3 100644
--- a/pkgs/tools/text/markdown-pp/default.nix
+++ b/pkgs/tools/text/markdown-pp/default.nix
@@ -1,4 +1,4 @@
-{ fetchFromGitHub, pythonPackages, lib, stdenv }:
+{ fetchFromGitHub, pythonPackages, lib }:
 
 with pythonPackages;
 buildPythonApplication rec {
diff --git a/pkgs/tools/text/pbgopy/default.nix b/pkgs/tools/text/pbgopy/default.nix
index 5e1473f8a3c..d4ed4eb0f03 100644
--- a/pkgs/tools/text/pbgopy/default.nix
+++ b/pkgs/tools/text/pbgopy/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "pbgopy";
diff --git a/pkgs/tools/text/platinum-searcher/default.nix b/pkgs/tools/text/platinum-searcher/default.nix
index 30e7e58345d..ca89b7dc2d8 100644
--- a/pkgs/tools/text/platinum-searcher/default.nix
+++ b/pkgs/tools/text/platinum-searcher/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "the_platinum_searcher";
diff --git a/pkgs/tools/text/proselint/default.nix b/pkgs/tools/text/proselint/default.nix
index ea72468dc69..143c43f660d 100644
--- a/pkgs/tools/text/proselint/default.nix
+++ b/pkgs/tools/text/proselint/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, buildPythonApplication, click, future, six }:
+{ lib, fetchurl, buildPythonApplication, click, future, six }:
 
 buildPythonApplication rec {
   pname = "proselint";
diff --git a/pkgs/tools/text/rpl/default.nix b/pkgs/tools/text/rpl/default.nix
index f53a1d79080..97a30211621 100644
--- a/pkgs/tools/text/rpl/default.nix
+++ b/pkgs/tools/text/rpl/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, pythonPackages }:
+{ lib, fetchFromGitHub, pythonPackages }:
 
 pythonPackages.buildPythonApplication rec {
   pname = "rpl";
diff --git a/pkgs/tools/text/schema2ldif/default.nix b/pkgs/tools/text/schema2ldif/default.nix
index 409bbc16a93..84196ae1119 100644
--- a/pkgs/tools/text/schema2ldif/default.nix
+++ b/pkgs/tools/text/schema2ldif/default.nix
@@ -1,4 +1,6 @@
-{ lib, stdenv, fetchurl, makeWrapper, perlPackages }: stdenv.mkDerivation rec {
+{ lib, stdenv, fetchurl, makeWrapper, perlPackages }:
+
+stdenv.mkDerivation rec {
   pname = "schema2ldif";
   version = "1.3";
 
diff --git a/pkgs/tools/text/transifex-client/default.nix b/pkgs/tools/text/transifex-client/default.nix
index 411c9cb9899..a0f3ad1c5e3 100644
--- a/pkgs/tools/text/transifex-client/default.nix
+++ b/pkgs/tools/text/transifex-client/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonApplication, fetchPypi
+{ lib, buildPythonApplication, fetchPypi
 , python-slugify, requests, urllib3, six, setuptools }:
 
 buildPythonApplication rec {
diff --git a/pkgs/tools/text/xurls/default.nix b/pkgs/tools/text/xurls/default.nix
index b1fd02ca75b..fa5418b4581 100644
--- a/pkgs/tools/text/xurls/default.nix
+++ b/pkgs/tools/text/xurls/default.nix
@@ -1,4 +1,4 @@
-{ buildGoPackage, lib, stdenv, fetchFromGitHub }:
+{ buildGoPackage, lib, fetchFromGitHub }:
 
 buildGoPackage rec {
   version = "2.2.0";
diff --git a/pkgs/tools/typesetting/mmark/default.nix b/pkgs/tools/typesetting/mmark/default.nix
index 70f7e8f53ca..bc5ddcc9d75 100644
--- a/pkgs/tools/typesetting/mmark/default.nix
+++ b/pkgs/tools/typesetting/mmark/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "mmark";
diff --git a/pkgs/tools/typesetting/odpdown/default.nix b/pkgs/tools/typesetting/odpdown/default.nix
index 989f61f4592..7b20d230b9f 100644
--- a/pkgs/tools/typesetting/odpdown/default.nix
+++ b/pkgs/tools/typesetting/odpdown/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, pythonPackages, libreoffice }:
+{ lib, fetchurl, pythonPackages, libreoffice }:
 
 pythonPackages.buildPythonApplication rec {
 
diff --git a/pkgs/tools/typesetting/tikzit/default.nix b/pkgs/tools/typesetting/tikzit/default.nix
index 29fd21ed31f..2f6d169d0cb 100644
--- a/pkgs/tools/typesetting/tikzit/default.nix
+++ b/pkgs/tools/typesetting/tikzit/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, mkDerivation, fetchFromGitHub, qmake, qttools, qtbase, poppler, flex, bison }:
+{ lib, mkDerivation, fetchFromGitHub, qmake, qttools, qtbase, poppler, flex, bison }:
 
 mkDerivation {
   pname = "tikzit";
diff --git a/pkgs/tools/video/vnc2flv/default.nix b/pkgs/tools/video/vnc2flv/default.nix
index ba28ef08c8f..88ec2f22b89 100644
--- a/pkgs/tools/video/vnc2flv/default.nix
+++ b/pkgs/tools/video/vnc2flv/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, pythonPackages }:
+{ lib, fetchurl, pythonPackages }:
 
 pythonPackages.buildPythonApplication rec {
   pname = "vnc2flv";
diff --git a/pkgs/tools/virtualization/awless/default.nix b/pkgs/tools/virtualization/awless/default.nix
index 3faf90ab4ac..061dd486e0d 100644
--- a/pkgs/tools/virtualization/awless/default.nix
+++ b/pkgs/tools/virtualization/awless/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "awless";
diff --git a/pkgs/tools/virtualization/awsebcli/default.nix b/pkgs/tools/virtualization/awsebcli/default.nix
index fa8e96def24..796ea36eacf 100644
--- a/pkgs/tools/virtualization/awsebcli/default.nix
+++ b/pkgs/tools/virtualization/awsebcli/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python3, glibcLocales }:
+{ lib, python3, glibcLocales }:
 let
 
   localPython = python3.override {
diff --git a/pkgs/tools/virtualization/distrobuilder/default.nix b/pkgs/tools/virtualization/distrobuilder/default.nix
index a7de9ae8b59..d06a2b4a17e 100644
--- a/pkgs/tools/virtualization/distrobuilder/default.nix
+++ b/pkgs/tools/virtualization/distrobuilder/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, pkg-config, buildGoPackage, fetchFromGitHub
+{ lib, pkg-config, buildGoPackage, fetchFromGitHub
 , makeWrapper, coreutils, gnupg, gnutar, squashfsTools, debootstrap
 }:
 
diff --git a/pkgs/tools/virtualization/euca2ools/default.nix b/pkgs/tools/virtualization/euca2ools/default.nix
index 371a867d4dd..88e83f42733 100644
--- a/pkgs/tools/virtualization/euca2ools/default.nix
+++ b/pkgs/tools/virtualization/euca2ools/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchgit, python2Packages }:
+{ lib, fetchgit, python2Packages }:
 
 let
   inherit (python2Packages) buildPythonApplication boto m2crypto;
diff --git a/pkgs/tools/virtualization/marathonctl/default.nix b/pkgs/tools/virtualization/marathonctl/default.nix
index 6f036795e72..fe31c64952a 100644
--- a/pkgs/tools/virtualization/marathonctl/default.nix
+++ b/pkgs/tools/virtualization/marathonctl/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage {
   pname = "marathonctl-unstable";
diff --git a/pkgs/tools/virtualization/udocker/default.nix b/pkgs/tools/virtualization/udocker/default.nix
index c971dfcb1bd..fb067de8212 100644
--- a/pkgs/tools/virtualization/udocker/default.nix
+++ b/pkgs/tools/virtualization/udocker/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, proot, patchelf, fakechroot, runc, simplejson, pycurl, coreutils, nose, mock, buildPythonApplication }:
+{ lib, fetchFromGitHub, proot, patchelf, fakechroot, runc, simplejson, pycurl, coreutils, nose, mock, buildPythonApplication }:
 
 buildPythonApplication rec {
 
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index e0d24da0ca8..8b86a0631a0 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -19276,7 +19276,7 @@ in
       kernel = (if kernel' == pkgs.linux_latest then linux_latest_for_hardened else kernel').override overrides;
     in linuxPackagesFor (kernel.override {
       structuredExtraConfig = import ../os-specific/linux/kernel/hardened/config.nix {
-        inherit lib stdenv;
+        inherit lib;
         inherit (kernel) version;
       };
       kernelPatches = kernel.kernelPatches ++ [