treewide: remove stdenv where not needed

author: Pavol Rusnak <pavol@rusnak.io> 2021-01-25 09:26:54 +0100
committer: Pavol Rusnak <pavol@rusnak.io> 2021-01-25 18:31:47 +0100
commit: a6ce00c50c36624fec06b2b756a766d4d0f4a888 (patch)
tree: 8d032f7254e836548750154e99dd5f579dc2a2d3 /pkgs/development
parent: e06e84759533c03b308b8b706da33908b4ef1cb9 (diff)
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1776 files changed, 1785 insertions, 1800 deletions
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";
author	Pavol Rusnak <pavol@rusnak.io>	2021-01-25 09:26:54 +0100
committer	Pavol Rusnak <pavol@rusnak.io>	2021-01-25 18:31:47 +0100
commit	a6ce00c50c36624fec06b2b756a766d4d0f4a888 (patch)
tree	8d032f7254e836548750154e99dd5f579dc2a2d3 /pkgs/development
parent	e06e84759533c03b308b8b706da33908b4ef1cb9 (diff)
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