python,pythonPackages: make aliases

Since aliases are disallowed in nixpkgs, this makes usage of Python 2
which is EOL more explicit.

85 files changed, 221 insertions, 223 deletions

diff --git a/pkgs/applications/blockchains/chia-plotter/default.nix b/pkgs/applications/blockchains/chia-plotter/default.nix
index b576cd2373c..51ca4469bc4 100644
--- a/pkgs/applications/blockchains/chia-plotter/default.nix
+++ b/pkgs/applications/blockchains/chia-plotter/default.nix
@@ -4,7 +4,7 @@
 , libsodium
 , cmake
 , substituteAll
-, pythonPackages
+, python3Packages
 }:
 
 stdenv.mkDerivation {
@@ -23,7 +23,7 @@ stdenv.mkDerivation {
     # prevent CMake from trying to get libraries on the Internet
     (substituteAll {
       src = ./dont_fetch_dependencies.patch;
-      pybind11_src = pythonPackages.pybind11.src;
+      pybind11_src = python3Packages.pybind11.src;
       relic_src = fetchFromGitHub {
         owner = "relic-toolkit";
         repo = "relic";
diff --git a/pkgs/applications/editors/tiled/default.nix b/pkgs/applications/editors/tiled/default.nix
index 4a53d585fea..2c3ddbf80b8 100644
--- a/pkgs/applications/editors/tiled/default.nix
+++ b/pkgs/applications/editors/tiled/default.nix
@@ -1,5 +1,5 @@
 { lib, mkDerivation, fetchFromGitHub, pkg-config, qmake
-, python, qtbase, qttools }:
+, python2, qtbase, qttools }:
 
 mkDerivation rec {
   pname = "tiled";
@@ -13,7 +13,7 @@ mkDerivation rec {
   };
 
   nativeBuildInputs = [ pkg-config qmake ];
-  buildInputs = [ python qtbase qttools ];
+  buildInputs = [ python2 qtbase qttools ];
 
   meta = with lib; {
     description = "Free, easy to use and flexible tile map editor";
diff --git a/pkgs/applications/editors/wxhexeditor/default.nix b/pkgs/applications/editors/wxhexeditor/default.nix
index 09037b2f0c3..c769ab42631 100644
--- a/pkgs/applications/editors/wxhexeditor/default.nix
+++ b/pkgs/applications/editors/wxhexeditor/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, fetchpatch, wxGTK, autoconf, automake, libtool, python, gettext }:
+{ lib, stdenv, fetchFromGitHub, fetchpatch, wxGTK, autoconf, automake, libtool, python2, gettext }:
 
 stdenv.mkDerivation rec {
   pname = "wxHexEditor";
@@ -11,7 +11,7 @@ stdenv.mkDerivation rec {
     sha256 = "08xnhaif8syv1fa0k6lc3jm7yg2k50b02lyds8w0jyzh4xi5crqj";
   };
 
-  buildInputs = [ wxGTK autoconf automake libtool python gettext ];
+  buildInputs = [ wxGTK autoconf automake libtool python2 gettext ];
 
   preConfigure = "patchShebangs .";
 
diff --git a/pkgs/applications/graphics/screencloud/default.nix b/pkgs/applications/graphics/screencloud/default.nix
index b7d6ecdef3d..b62ca680cbc 100644
--- a/pkgs/applications/graphics/screencloud/default.nix
+++ b/pkgs/applications/graphics/screencloud/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, cmake, qt4, quazip, qt-mobility, qxt, pythonPackages }:
+{ lib, stdenv, fetchFromGitHub, cmake, qt4, quazip, qt-mobility, qxt, python2Packages }:
 
 with lib;
 stdenv.mkDerivation rec {
@@ -18,7 +18,7 @@ stdenv.mkDerivation rec {
   };
 
   nativeBuildInputs = [ cmake ];
-  buildInputs = [ qt4 quazip qt-mobility qxt pythonPackages.python pythonPackages.pycrypto ];
+  buildInputs = [ qt4 quazip qt-mobility qxt python2Packages.python python2Packages.pycrypto ];
 
   patchPhase = ''
     # Required to make the configure script work. Normally, screencloud's
@@ -59,7 +59,7 @@ stdenv.mkDerivation rec {
   postInstall = ''
     patchShebangs $prefix/opt/screencloud/screencloud.sh
     substituteInPlace "$prefix/opt/screencloud/screencloud.sh" --replace "/opt" "$prefix/opt"
-    sed -i "2 i\export PYTHONPATH=$(toPythonPath ${pythonPackages.pycrypto}):\$PYTHONPATH" "$prefix/opt/screencloud/screencloud.sh"
+    sed -i "2 i\export PYTHONPATH=$(toPythonPath ${python2Packages.pycrypto}):\$PYTHONPATH" "$prefix/opt/screencloud/screencloud.sh"
     mkdir $prefix/bin
     mkdir $prefix/lib
     ln -s $prefix/opt/screencloud/screencloud.sh $prefix/bin/screencloud
diff --git a/pkgs/applications/misc/ocropus/default.nix b/pkgs/applications/misc/ocropus/default.nix
index 507399c012b..41c6cdee41c 100644
--- a/pkgs/applications/misc/ocropus/default.nix
+++ b/pkgs/applications/misc/ocropus/default.nix
@@ -1,4 +1,4 @@
-{ lib, fetchFromGitHub, fetchurl, pythonPackages, curl }:
+{ lib, fetchFromGitHub, fetchurl, python2Packages, curl }:
 
 let
   getmodel = name: sha256: {
@@ -17,7 +17,7 @@ let
   ];
 
 in
-pythonPackages.buildPythonApplication rec {
+python2Packages.buildPythonApplication rec {
   pname = "ocropus";
   version = "1.3.3";
 
@@ -28,7 +28,7 @@ pythonPackages.buildPythonApplication rec {
     owner = "tmbdev";
   };
 
-  propagatedBuildInputs = with pythonPackages; [ curl numpy scipy pillow
+  propagatedBuildInputs = with python2Packages; [ curl numpy scipy pillow
     matplotlib beautifulsoup4 pygtk lxml ];
 
   enableParallelBuilding = true;
diff --git a/pkgs/applications/misc/pdfdiff/default.nix b/pkgs/applications/misc/pdfdiff/default.nix
index 65ee6a65593..20a95338497 100644
--- a/pkgs/applications/misc/pdfdiff/default.nix
+++ b/pkgs/applications/misc/pdfdiff/default.nix
@@ -1,6 +1,6 @@
-{ lib, pythonPackages, fetchurl, xpdf }:
+{ lib, python2Packages, fetchurl, xpdf }:
 let
-  py = pythonPackages;
+  py = python2Packages;
 in
 py.buildPythonApplication rec {
   name = "pdfdiff-${version}";
@@ -11,7 +11,7 @@ py.buildPythonApplication rec {
     sha256 = "0zxwjjbklz87wkbhkmsvhc7xmv5php7m2a9vm6ydhmhlxsybf836";
   };
 
-  buildInputs = [  pythonPackages.wrapPython ];
+  buildInputs = [  python2Packages.wrapPython ];
 
   dontConfigure = true;
   dontBuild = true;
@@ -29,7 +29,7 @@ py.buildPythonApplication rec {
     cp pdfdiff.py $out/bin/pdfdiff
     chmod +x $out/bin/pdfdiff
 
-    substituteInPlace $out/bin/pdfdiff --replace "#!/usr/bin/python" "#!${pythonPackages.python.interpreter}"
+    substituteInPlace $out/bin/pdfdiff --replace "#!/usr/bin/python" "#!${python2Packages.python.interpreter}"
     '';
 
   meta = with lib; {
diff --git a/pkgs/applications/misc/phwmon/default.nix b/pkgs/applications/misc/phwmon/default.nix
index 717c5c3feb1..22d94006ddc 100644
--- a/pkgs/applications/misc/phwmon/default.nix
+++ b/pkgs/applications/misc/phwmon/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitLab, pythonPackages }:
+{ lib, stdenv, fetchFromGitLab, python2Packages }:
 
 stdenv.mkDerivation {
   pname = "phwmon";
@@ -11,11 +11,11 @@ stdenv.mkDerivation {
     sha256 = "1hqmsq66y8bqkpvszw84jyk8haxq3cjnz105hlkmp7786vfmkisq";
   };
 
-  nativeBuildInputs = [ pythonPackages.wrapPython ];
+  nativeBuildInputs = [ python2Packages.wrapPython ];
 
-  buildInputs = [ pythonPackages.pygtk pythonPackages.psutil ];
+  buildInputs = [ python2Packages.pygtk python2Packages.psutil ];
 
-  pythonPath = [ pythonPackages.pygtk pythonPackages.psutil ];
+  pythonPath = [ python2Packages.pygtk python2Packages.psutil ];
 
   patchPhase = ''
     substituteInPlace install.sh --replace "/usr/local" "$out"
diff --git a/pkgs/applications/misc/survex/default.nix b/pkgs/applications/misc/survex/default.nix
index 27723096588..f8f8b5b553c 100644
--- a/pkgs/applications/misc/survex/default.nix
+++ b/pkgs/applications/misc/survex/default.nix
@@ -9,7 +9,7 @@
 , proj_7
 , perl532
 , unscii
-, python
+, python2
 , libGL
 , libGLU
 , xlibsWrapper
@@ -26,7 +26,7 @@ stdenv.mkDerivation rec {
   pname = "survex";
   version = "1.2.44";
 
-  nativeBuildInputs = [ docbook5 docbook2x autoreconfHook pkg-config perlenv python ];
+  nativeBuildInputs = [ docbook5 docbook2x autoreconfHook pkg-config perlenv python2 ];
 
   buildInputs = [
     libGL libGLU ffmpeg proj_7
diff --git a/pkgs/applications/misc/weather/default.nix b/pkgs/applications/misc/weather/default.nix
index 12edfe280be..4c5c5e3a840 100644
--- a/pkgs/applications/misc/weather/default.nix
+++ b/pkgs/applications/misc/weather/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, pythonPackages, installShellFiles }:
+{ lib, stdenv, fetchurl, python2Packages, installShellFiles }:
 
 stdenv.mkDerivation rec {
   version = "2.4.2";
@@ -11,7 +11,7 @@ stdenv.mkDerivation rec {
 
   nativeBuildInputs = [
     installShellFiles
-    pythonPackages.wrapPython
+    python2Packages.wrapPython
   ];
 
   dontConfigure = true;
@@ -20,7 +20,7 @@ stdenv.mkDerivation rec {
   # Upstream doesn't provide a setup.py or alike, so we follow:
   # http://fungi.yuggoth.org/weather/doc/install.rst#id3
   installPhase = ''
-    site_packages=$out/${pythonPackages.python.sitePackages}
+    site_packages=$out/${python2Packages.python.sitePackages}
     install -Dt $out/bin -m 755 weather
     install -Dt $site_packages weather.py
     install -Dt $out/share/weather-util \
diff --git a/pkgs/applications/networking/instant-messengers/pidgin-plugins/purple-plugin-pack/default.nix b/pkgs/applications/networking/instant-messengers/pidgin-plugins/purple-plugin-pack/default.nix
index ef9ce5bca74..f393a17c1bc 100644
--- a/pkgs/applications/networking/instant-messengers/pidgin-plugins/purple-plugin-pack/default.nix
+++ b/pkgs/applications/networking/instant-messengers/pidgin-plugins/purple-plugin-pack/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, pidgin, intltool, python } :
+{ lib, stdenv, fetchurl, pidgin, intltool, python2 } :
 
 stdenv.mkDerivation rec {
   pname = "purple-plugin-pack";
@@ -8,7 +8,7 @@ stdenv.mkDerivation rec {
     sha256 = "0g5hmy7fwgjq59j52h9yps28jsjjrfkd4r18gyx6hfd3g3kzbg1b";
   };
 
-  buildInputs = [ pidgin intltool python ];
+  buildInputs = [ pidgin intltool python2 ];
 
   meta = with lib; {
     homepage = "https://bitbucket.org/rekkanoryo/purple-plugin-pack";
diff --git a/pkgs/applications/networking/instant-messengers/torchat/default.nix b/pkgs/applications/networking/instant-messengers/torchat/default.nix
index 8fece541272..3278d68cd0b 100644
--- a/pkgs/applications/networking/instant-messengers/torchat/default.nix
+++ b/pkgs/applications/networking/instant-messengers/torchat/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, python, unzip, wxPython, wrapPython, tor }:
+{ lib, stdenv, fetchFromGitHub, python2, unzip, tor }:
 
 stdenv.mkDerivation rec {
   pname = "torchat";
@@ -12,8 +12,8 @@ stdenv.mkDerivation rec {
   };
 
   nativeBuildInputs = [ unzip ];
-  buildInputs = [ python wxPython wrapPython ];
-  pythonPath = [ wxPython ];
+  buildInputs = with python2.pkgs; [ python wxPython wrapPython ];
+  pythonPath = with python2.pkgs; [ wxPython ];
 
   preConfigure = "cd torchat/src; rm portable.txt";
 
@@ -24,7 +24,7 @@ stdenv.mkDerivation rec {
 
     mkdir -p $out/lib/torchat
     cp -rf * $out/lib/torchat
-    makeWrapper ${python}/bin/python $out/bin/torchat \
+    makeWrapper ${python2}/bin/python $out/bin/torchat \
         --set PYTHONPATH $out/lib/torchat:$program_PYTHONPATH \
         --run "cd $out/lib/torchat" \
         --add-flags "-O $out/lib/torchat/torchat.py"
diff --git a/pkgs/applications/networking/p2p/twister/default.nix b/pkgs/applications/networking/p2p/twister/default.nix
index 1d05cafef83..9c708b79588 100644
--- a/pkgs/applications/networking/p2p/twister/default.nix
+++ b/pkgs/applications/networking/p2p/twister/default.nix
@@ -13,7 +13,10 @@ let
     };
   };
 
-  boostPython = boost.override { enablePython = true; };
+  boostPython = boost.override {
+    enablePython = true;
+    python = python2;
+  };
 
 in stdenv.mkDerivation rec {
   pname = "twister";
diff --git a/pkgs/applications/radio/soapysdr/default.nix b/pkgs/applications/radio/soapysdr/default.nix
index efd438adf63..79dcab19acb 100644
--- a/pkgs/applications/radio/soapysdr/default.nix
+++ b/pkgs/applications/radio/soapysdr/default.nix
@@ -2,7 +2,8 @@
 , fetchFromGitHub, cmake
 , libusb-compat-0_1, pkg-config
 , usePython ? false
-, python, ncurses, swig2
+, python ? null
+, ncurses, swig2
 , extraPackages ? []
 } :
 
diff --git a/pkgs/applications/science/biology/poretools/default.nix b/pkgs/applications/science/biology/poretools/default.nix
index b2cefefb5cb..efbedf9a121 100755
--- a/pkgs/applications/science/biology/poretools/default.nix
+++ b/pkgs/applications/science/biology/poretools/default.nix
@@ -1,6 +1,6 @@
-{ lib, pythonPackages, fetchFromGitHub }:
+{ lib, python2Packages, fetchFromGitHub }:
 
-pythonPackages.buildPythonPackage rec {
+python2Packages.buildPythonPackage rec {
   pname = "poretools";
   version = "unstable-2016-07-10";
 
@@ -11,7 +11,7 @@ pythonPackages.buildPythonPackage rec {
     sha256 = "0bglj833wxpp3cq430p1d3xp085ls221js2y90w7ir2x5ay8l7am";
   };
 
-  propagatedBuildInputs = [pythonPackages.h5py pythonPackages.matplotlib pythonPackages.seaborn pythonPackages.pandas];
+  propagatedBuildInputs = [python2Packages.h5py python2Packages.matplotlib python2Packages.seaborn python2Packages.pandas];
 
   meta = {
     description = "a toolkit for working with nanopore sequencing data from Oxford Nanopore";
diff --git a/pkgs/applications/science/machine-learning/shogun/default.nix b/pkgs/applications/science/machine-learning/shogun/default.nix
index 911d0043ed2..3cb018b9a5d 100644
--- a/pkgs/applications/science/machine-learning/shogun/default.nix
+++ b/pkgs/applications/science/machine-learning/shogun/default.nix
@@ -6,7 +6,7 @@
   # build
 , cmake
 , ctags
-, pythonPackages
+, python2Packages
 , swig
   # math
 , eigen
@@ -36,7 +36,7 @@
 , withSvmLight ? false
 }:
 
-assert pythonSupport -> pythonPackages != null;
+assert pythonSupport -> python2Packages != null;
 assert opencvSupport -> opencv != null;
 
 assert (!blas.isILP64) && (!lapack.isILP64);
@@ -101,7 +101,7 @@ stdenv.mkDerivation rec {
   ] ++ lib.optional (!withSvmLight) ./svmlight-scrubber.patch;
 
   nativeBuildInputs = [ cmake swig ctags ]
-    ++ (with pythonPackages; [ python jinja2 ply ]);
+    ++ (with python2Packages; [ python jinja2 ply ]);
 
   buildInputs = [
     eigen
@@ -121,7 +121,7 @@ stdenv.mkDerivation rec {
     nlopt
     lp_solve
     colpack
-  ] ++ lib.optionals pythonSupport (with pythonPackages; [ python numpy ])
+  ] ++ lib.optionals pythonSupport (with python2Packages; [ python numpy ])
     ++ lib.optional opencvSupport opencv;
 
   cmakeFlags = let
diff --git a/pkgs/applications/science/misc/sasview/default.nix b/pkgs/applications/science/misc/sasview/default.nix
index bbbe80eb656..d12f9454ce7 100644
--- a/pkgs/applications/science/misc/sasview/default.nix
+++ b/pkgs/applications/science/misc/sasview/default.nix
@@ -1,25 +1,25 @@
-{ lib, fetchFromGitHub, gcc, python }:
+{ lib, fetchFromGitHub, gcc, python2 }:
 
 let
   xhtml2pdf = import ./xhtml2pdf.nix {
     inherit lib;
-    fetchPypi = python.pkgs.fetchPypi;
-    buildPythonPackage = python.pkgs.buildPythonPackage;
-    html5lib = python.pkgs.html5lib;
-    httplib2 = python.pkgs.httplib2;
-    nose = python.pkgs.nose;
-    pillow = python.pkgs.pillow;
-    pypdf2 = python.pkgs.pypdf2;
-    reportlab = python.pkgs.reportlab;
+    fetchPypi = python2.pkgs.fetchPypi;
+    buildPythonPackage = python2.pkgs.buildPythonPackage;
+    html5lib = python2.pkgs.html5lib;
+    httplib2 = python2.pkgs.httplib2;
+    nose = python2.pkgs.nose;
+    pillow = python2.pkgs.pillow;
+    pypdf2 = python2.pkgs.pypdf2;
+    reportlab = python2.pkgs.reportlab;
   };
 
 in
 
-python.pkgs.buildPythonApplication rec {
+python2.pkgs.buildPythonApplication rec {
   pname = "sasview";
   version = "4.2.0";
 
-  checkInputs = with python.pkgs; [
+  checkInputs = with python2.pkgs; [
     pytest
     unittest-xml-reporting
   ];
@@ -35,7 +35,7 @@ python.pkgs.buildPythonApplication rec {
     HOME=$(mktemp -d) py.test
   '';
 
-  propagatedBuildInputs = with python.pkgs; [
+  propagatedBuildInputs = with python2.pkgs; [
     bumps
     gcc
     h5py
diff --git a/pkgs/applications/science/misc/tulip/default.nix b/pkgs/applications/science/misc/tulip/default.nix
index 62d638717f8..1dfd47a3d38 100644
--- a/pkgs/applications/science/misc/tulip/default.nix
+++ b/pkgs/applications/science/misc/tulip/default.nix
@@ -1,5 +1,5 @@
 { fetchurl, lib, stdenv, libxml2, freetype, libGLU, libGL, glew, qt4
-, cmake, makeWrapper, libjpeg, python }:
+, cmake, makeWrapper, libjpeg, python2 }:
 
 let version = "5.2.1"; in
 stdenv.mkDerivation rec {
@@ -11,7 +11,7 @@ stdenv.mkDerivation rec {
     sha256 = "0bqmqy6sri87a8xv5xf7ffaq5zin4hiaa13g0l64b84i7yckfwky";
   };
 
-  buildInputs = [ libxml2 freetype glew libGLU libGL qt4 libjpeg python ];
+  buildInputs = [ libxml2 freetype glew libGLU libGL qt4 libjpeg python2 ];
 
   nativeBuildInputs = [ cmake makeWrapper ];
 
diff --git a/pkgs/applications/version-management/rapidsvn/default.nix b/pkgs/applications/version-management/rapidsvn/default.nix
index 33eba79732d..60d011b653d 100644
--- a/pkgs/applications/version-management/rapidsvn/default.nix
+++ b/pkgs/applications/version-management/rapidsvn/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, wxGTK, subversion, apr, aprutil, python }:
+{ lib, stdenv, fetchurl, wxGTK, subversion, apr, aprutil, python2 }:
 
 stdenv.mkDerivation rec {
   pname = "rapidsvn";
@@ -9,7 +9,7 @@ stdenv.mkDerivation rec {
     sha256 = "1bmcqjc12k5w0z40k7fkk8iysqv4fw33i80gvcmbakby3d4d4i4p";
   };
 
-  buildInputs = [ wxGTK subversion apr aprutil python ];
+  buildInputs = [ wxGTK subversion apr aprutil python2 ];
 
   configureFlags = [ "--with-svn-include=${subversion.dev}/include"
     "--with-svn-lib=${subversion.out}/lib" ];
diff --git a/pkgs/applications/version-management/src/default.nix b/pkgs/applications/version-management/src/default.nix
index cddcd3d8aa2..1735449e3fd 100644
--- a/pkgs/applications/version-management/src/default.nix
+++ b/pkgs/applications/version-management/src/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, python, rcs, git, makeWrapper }:
+{ lib, stdenv, fetchurl, python2, rcs, git, makeWrapper }:
 
 stdenv.mkDerivation rec {
   pname = "src";
@@ -10,7 +10,7 @@ stdenv.mkDerivation rec {
   };
 
   nativeBuildInputs = [ makeWrapper ];
-  buildInputs = [ python rcs git ];
+  buildInputs = [ python2 rcs git ];
 
   preConfigure = ''
     patchShebangs .
diff --git a/pkgs/applications/version-management/srcml/default.nix b/pkgs/applications/version-management/srcml/default.nix
index 11dbfc299a4..60260ee4de3 100644
--- a/pkgs/applications/version-management/srcml/default.nix
+++ b/pkgs/applications/version-management/srcml/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, cmake, libxml2, libxslt, boost, libarchive, python, antlr2,
+{ lib, stdenv, fetchurl, cmake, libxml2, libxslt, boost, libarchive, python2, antlr2,
   curl
 }:
 
@@ -23,7 +23,7 @@ stdenv.mkDerivation rec {
   ];
 
   nativeBuildInputs = [ cmake antlr2 ];
-  buildInputs = [ libxml2 libxslt boost libarchive python curl ];
+  buildInputs = [ libxml2 libxslt boost libarchive python2 curl ];
 
   meta = {
     description = "Infrastructure for exploration, analysis, and manipulation of source code";
diff --git a/pkgs/applications/window-managers/wmii-hg/default.nix b/pkgs/applications/window-managers/wmii-hg/default.nix
index d0c35ab7cbb..6759e15ee83 100644
--- a/pkgs/applications/window-managers/wmii-hg/default.nix
+++ b/pkgs/applications/window-managers/wmii-hg/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, unzip, pkg-config, libixp_hg, txt2tags, dash, python, which
+{ lib, stdenv, fetchurl, unzip, pkg-config, libixp_hg, txt2tags, dash, python2, which
 , libX11 , libXrender, libXext, libXinerama, libXrandr, libXft }:
 
 stdenv.mkDerivation rec {
@@ -30,7 +30,7 @@ stdenv.mkDerivation rec {
   '';
 
   nativeBuildInputs = [ pkg-config unzip ];
-  buildInputs = [ libixp_hg txt2tags dash python which
+  buildInputs = [ libixp_hg txt2tags dash python2 which
                   libX11 libXrender libXext libXinerama libXrandr libXft ];
 
   # For some reason including mercurial in buildInputs did not help
diff --git a/pkgs/development/compilers/hip/default.nix b/pkgs/development/compilers/hip/default.nix
index 68c6ea39cf7..62d8f65ff8f 100644
--- a/pkgs/development/compilers/hip/default.nix
+++ b/pkgs/development/compilers/hip/default.nix
@@ -16,7 +16,7 @@
 , makeWrapper
 , numactl
 , perl
-, python
+, python2
 , rocclr
 , rocm-comgr
 , rocm-device-libs
@@ -56,7 +56,7 @@ let
       substituteInPlace bin/hip_embed_pch.sh \
         --replace '$LLVM_DIR/bin/' ""
 
-      sed 's,#!/usr/bin/python,#!${python}/bin/python,' -i hip_prof_gen.py
+      sed 's,#!/usr/bin/python,#!${python2}/bin/python,' -i hip_prof_gen.py
 
       sed -e 's,$ROCM_AGENT_ENUM = "''${ROCM_PATH}/bin/rocm_agent_enumerator";,$ROCM_AGENT_ENUM = "${rocminfo}/bin/rocm_agent_enumerator";,' \
           -e 's,^\($DEVICE_LIB_PATH=\).*$,\1"${rocm-device-libs}/amdgcn/bitcode";,' \
@@ -111,7 +111,7 @@ stdenv.mkDerivation rec {
     sha256 = "WvOuQu/EN81Kwcoc3ZtGlhb996edQJ3OWFsmPuqeNXE=";
   };
 
-  nativeBuildInputs = [ cmake python makeWrapper perl ];
+  nativeBuildInputs = [ cmake python2 makeWrapper perl ];
   buildInputs = [ libxml2 numactl libglvnd libX11 ];
   propagatedBuildInputs = [
     clang
diff --git a/pkgs/development/interpreters/acl2/default.nix b/pkgs/development/interpreters/acl2/default.nix
index a1b59b8bf69..51b1cfa1141 100644
--- a/pkgs/development/interpreters/acl2/default.nix
+++ b/pkgs/development/interpreters/acl2/default.nix
@@ -1,6 +1,6 @@
 { lib, stdenv, callPackage, fetchFromGitHub, runCommandLocal, makeWrapper, substituteAll
 , sbcl, bash, which, perl, hostname
-, openssl, glucose, minisat, abc-verifier, z3, python
+, openssl, glucose, minisat, abc-verifier, z3, python2
 , certifyBooks ? true
 } @ args:
 
@@ -48,7 +48,7 @@ in stdenv.mkDerivation rec {
     which perl hostname makeWrapper
     # Some of the books require one or more of these external tools:
     openssl.out glucose minisat abc-verifier libipasir
-    z3 (python.withPackages (ps: [ ps.z3 ]))
+    z3 (python2.withPackages (ps: [ ps.z3 ]))
   ];
 
   # NOTE: Parallel building can be memory-intensive depending on the number of
diff --git a/pkgs/development/interpreters/clojurescript/lumo/default.nix b/pkgs/development/interpreters/clojurescript/lumo/default.nix
index 7bd3913260d..d8fa630c30d 100644
--- a/pkgs/development/interpreters/clojurescript/lumo/default.nix
+++ b/pkgs/development/interpreters/clojurescript/lumo/default.nix
@@ -8,7 +8,7 @@
 , unzip
 , nodePackages
 , xcbuild
-, python
+, python2
 , openssl
 , pkgs
 , fetchgit
@@ -154,7 +154,7 @@ stdenv.mkDerivation {
     nodejs
     clojure
     jre
-    python
+    python2
     openssl
     gnutar
     nodePackages."lumo-build-deps-../interpreters/clojurescript/lumo"
diff --git a/pkgs/development/interpreters/wasmtime/default.nix b/pkgs/development/interpreters/wasmtime/default.nix
index 675a7cdd6bc..6022245cac7 100644
--- a/pkgs/development/interpreters/wasmtime/default.nix
+++ b/pkgs/development/interpreters/wasmtime/default.nix
@@ -1,4 +1,4 @@
-{ rustPlatform, fetchFromGitHub, lib, python, cmake, llvmPackages, clang, stdenv, darwin }:
+{ rustPlatform, fetchFromGitHub, lib, python2, cmake, llvmPackages, clang, stdenv, darwin }:
 
 rustPlatform.buildRustPackage rec {
   pname = "wasmtime";
@@ -14,7 +14,7 @@ rustPlatform.buildRustPackage rec {
 
   cargoSha256 = "1wlig9gls7s1k1swxwhl82vfga30bady8286livxc4y2zp0vb18w";
 
-  nativeBuildInputs = [ python cmake clang ];
+  nativeBuildInputs = [ python2 cmake clang ];
   buildInputs = [ llvmPackages.libclang ] ++
    lib.optionals stdenv.isDarwin [ darwin.apple_sdk.frameworks.Security ];
   LIBCLANG_PATH = "${llvmPackages.libclang.lib}/lib";
diff --git a/pkgs/development/libraries/blitz/default.nix b/pkgs/development/libraries/blitz/default.nix
index c4a983d879c..2b5e5a4addc 100644
--- a/pkgs/development/libraries/blitz/default.nix
+++ b/pkgs/development/libraries/blitz/default.nix
@@ -4,7 +4,7 @@
 , pkg-config
 , gfortran
 , texinfo
-, python
+, python2
 , boost
   # Select SIMD alignment width (in bytes) for vectorization.
 , simdWidth ? 1
@@ -32,7 +32,7 @@ stdenv.mkDerivation rec {
     sha256 = "0nq84vwvvbq7m0my6h835ijfw53bxdp42qjc6kjhk436888qy9rh";
   };
 
-  nativeBuildInputs = [ pkg-config python texinfo ];
+  nativeBuildInputs = [ pkg-config python2 texinfo ];
   buildInputs = [ gfortran texinfo boost ];
 
   configureFlags =
diff --git a/pkgs/development/libraries/ntrack/default.nix b/pkgs/development/libraries/ntrack/default.nix
index eef6bbdd580..033b9d8c619 100644
--- a/pkgs/development/libraries/ntrack/default.nix
+++ b/pkgs/development/libraries/ntrack/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, qt4, pkg-config, libnl, python }:
+{ lib, stdenv, fetchurl, qt4, pkg-config, libnl, python2 }:
 
 stdenv.mkDerivation rec {
   pname = "ntrack";
@@ -11,7 +11,7 @@ stdenv.mkDerivation rec {
 
   buildInputs = [ libnl qt4 ];
 
-  nativeBuildInputs = [ pkg-config python ];
+  nativeBuildInputs = [ pkg-config python2 ];
 
   # error: ISO C does not support '__FUNCTION__' predefined identifier [-Werror=pedantic]
   NIX_CFLAGS_COMPILE = "-Wno-error";
diff --git a/pkgs/development/libraries/openbabel/2.nix b/pkgs/development/libraries/openbabel/2.nix
index 4f2f31d614c..627d5bbe297 100644
--- a/pkgs/development/libraries/openbabel/2.nix
+++ b/pkgs/development/libraries/openbabel/2.nix
@@ -1,4 +1,4 @@
-{stdenv, lib, fetchFromGitHub, fetchpatch, cmake, zlib, libxml2, eigen, python, cairo, pcre, pkg-config }:
+{stdenv, lib, fetchFromGitHub, fetchpatch, cmake, zlib, libxml2, eigen, python2, cairo, pcre, pkg-config }:
 
 stdenv.mkDerivation rec {
   pname = "openbabel";
@@ -19,7 +19,7 @@ stdenv.mkDerivation rec {
     })
   ];
 
-  buildInputs = [ zlib libxml2 eigen python cairo pcre ];
+  buildInputs = [ zlib libxml2 eigen python2 cairo pcre ];
 
   nativeBuildInputs = [ cmake pkg-config ];
 
diff --git a/pkgs/development/libraries/opencv/default.nix b/pkgs/development/libraries/opencv/default.nix
index ed2f700dc82..34dcd240838 100644
--- a/pkgs/development/libraries/opencv/default.nix
+++ b/pkgs/development/libraries/opencv/default.nix
@@ -1,6 +1,6 @@
 { lib, stdenv, fetchFromGitHub, cmake, pkg-config, unzip
 , zlib
-, enablePython ? false, pythonPackages
+, enablePython ? false, python2Packages
 , enableGtk2 ? false, gtk2
 , enableJPEG ? true, libjpeg
 , enablePNG ? true, libpng
@@ -44,7 +44,7 @@ stdenv.mkDerivation rec {
 
   buildInputs =
        [ zlib ]
-    ++ lib.optional enablePython pythonPackages.python
+    ++ lib.optional enablePython python2Packages.python
     ++ lib.optional enableGtk2 gtk2
     ++ lib.optional enableJPEG libjpeg
     ++ lib.optional enablePNG libpng
@@ -56,7 +56,7 @@ stdenv.mkDerivation rec {
     ++ lib.optionals stdenv.isDarwin [ Cocoa QTKit ]
     ;
 
-  propagatedBuildInputs = lib.optional enablePython pythonPackages.numpy;
+  propagatedBuildInputs = lib.optional enablePython python2Packages.numpy;
 
   nativeBuildInputs = [ cmake pkg-config unzip ];
 
diff --git a/pkgs/development/libraries/pcmsolver/default.nix b/pkgs/development/libraries/pcmsolver/default.nix
index 8cd4b318cc5..dd94a4a088c 100644
--- a/pkgs/development/libraries/pcmsolver/default.nix
+++ b/pkgs/development/libraries/pcmsolver/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, cmake, perl, gfortran, python
+{ lib, stdenv, fetchFromGitHub, cmake, perl, gfortran, python2
 , boost, eigen, zlib
 } :
 
@@ -17,7 +17,7 @@ stdenv.mkDerivation rec {
     cmake
     gfortran
     perl
-    python
+    python2
   ];
 
   buildInputs = [
diff --git a/pkgs/development/libraries/physics/fastjet/default.nix b/pkgs/development/libraries/physics/fastjet/default.nix
index 65fb04b707a..5c3bc936e8c 100644
--- a/pkgs/development/libraries/physics/fastjet/default.nix
+++ b/pkgs/development/libraries/physics/fastjet/default.nix
@@ -1,7 +1,7 @@
 { lib
 , stdenv
 , fetchurl
-, python
+, python ? null
 , withPython ? false
 }:
 
diff --git a/pkgs/development/libraries/ptex/default.nix b/pkgs/development/libraries/ptex/default.nix
index d0bdb95fecc..561c9cf93c2 100644
--- a/pkgs/development/libraries/ptex/default.nix
+++ b/pkgs/development/libraries/ptex/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, zlib, python, cmake, pkg-config }:
+{ lib, stdenv, fetchFromGitHub, zlib, python2, cmake, pkg-config }:
 
 stdenv.mkDerivation rec
 {
@@ -15,7 +15,7 @@ stdenv.mkDerivation rec
   outputs = [ "bin" "dev" "out" "lib" ];
 
   nativeBuildInputs = [ cmake ];
-  buildInputs = [ zlib python pkg-config ];
+  buildInputs = [ zlib python2 pkg-config ];
 
   # Can be removed in the next release
   # https://github.com/wdas/ptex/pull/42
diff --git a/pkgs/development/libraries/rabbitmq-java-client/default.nix b/pkgs/development/libraries/rabbitmq-java-client/default.nix
index 96e4a42ad09..7cd3a086cdb 100644
--- a/pkgs/development/libraries/rabbitmq-java-client/default.nix
+++ b/pkgs/development/libraries/rabbitmq-java-client/default.nix
@@ -1,4 +1,4 @@
-{ fetchurl, lib, stdenv, ant, jdk, jre, python, makeWrapper }:
+{ fetchurl, lib, stdenv, ant, jdk, jre, python2, makeWrapper }:
 
 stdenv.mkDerivation rec {
   pname = "rabbitmq-java-client";
@@ -10,7 +10,7 @@ stdenv.mkDerivation rec {
   };
 
   nativeBuildInputs = [ makeWrapper ];
-  buildInputs = [ ant jdk python ];
+  buildInputs = [ ant jdk python2 ];
 
   buildPhase = "ant dist";
 
diff --git a/pkgs/development/libraries/snack/default.nix b/pkgs/development/libraries/snack/default.nix
index 8c97d0224c6..1c876cf3636 100644
--- a/pkgs/development/libraries/snack/default.nix
+++ b/pkgs/development/libraries/snack/default.nix
@@ -1,6 +1,6 @@
-# alsa-lib vorbis-tools python can be made optional
+# alsa-lib vorbis-tools python2 can be made optional
 
-{ lib, stdenv, fetchurl, python, tcl, tk, vorbis-tools, pkg-config, xlibsWrapper }:
+{ lib, stdenv, fetchurl, python2, tcl, tk, vorbis-tools, pkg-config, xlibsWrapper }:
 
 stdenv.mkDerivation rec {
   pname = "snack";
@@ -16,7 +16,7 @@ stdenv.mkDerivation rec {
   postUnpack = ''sourceRoot="$sourceRoot/unix"'';
 
   nativeBuildInputs = [ pkg-config ];
-  buildInputs = [ python tcl tk vorbis-tools xlibsWrapper ];
+  buildInputs = [ python2 tcl tk vorbis-tools xlibsWrapper ];
 
   hardeningDisable = [ "format" ];
 
diff --git a/pkgs/development/libraries/swiften/default.nix b/pkgs/development/libraries/swiften/default.nix
index 2325c043d01..ef30c5916ea 100644
--- a/pkgs/development/libraries/swiften/default.nix
+++ b/pkgs/development/libraries/swiften/default.nix
@@ -1,6 +1,6 @@
 { stdenv
 , lib
-, python
+, python2
 , libidn
 , lua
 , miniupnpc
@@ -40,7 +40,7 @@ stdenv.mkDerivation rec {
   ];
 
   buildInputs = [
-    python
+    python2
     libidn
     lua
     miniupnpc
diff --git a/pkgs/development/ocaml-modules/llvm/default.nix b/pkgs/development/ocaml-modules/llvm/default.nix
index 3357b99cebf..264d95f39f6 100644
--- a/pkgs/development/ocaml-modules/llvm/default.nix
+++ b/pkgs/development/ocaml-modules/llvm/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, python, cmake, libllvm, ocaml, findlib, ctypes }:
+{ stdenv, lib, python2, cmake, libllvm, ocaml, findlib, ctypes }:
 
 let version = lib.getVersion libllvm; in
 
@@ -9,7 +9,7 @@ stdenv.mkDerivation {
   inherit (libllvm) src;
 
   nativeBuildInputs = [ cmake ];
-  buildInputs = [ python ocaml findlib ctypes ];
+  buildInputs = [ python2 ocaml findlib ctypes ];
   propagatedBuildInputs = [ libllvm ];
 
   cmakeFlags = [
diff --git a/pkgs/development/ocaml-modules/pycaml/default.nix b/pkgs/development/ocaml-modules/pycaml/default.nix
index bee8a6106ea..c19b40eb9af 100644
--- a/pkgs/development/ocaml-modules/pycaml/default.nix
+++ b/pkgs/development/ocaml-modules/pycaml/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, ocaml, findlib, ncurses, python, ocaml_make }:
+{ lib, stdenv, fetchurl, ocaml, findlib, ncurses, python2, ocaml_make }:
 
 # This is the original pycaml version with patches from debian.
 
@@ -27,7 +27,7 @@ stdenv.mkDerivation rec {
   sourceRoot = "pycaml";
   patches = [ "../debian/patches/*.patch" ];
 
-  buildInputs = [ ncurses ocaml findlib python ocaml_make ];
+  buildInputs = [ ncurses ocaml findlib python2 ocaml_make ];
   createFindlibDestdir = true;
 
   # the Makefile is not shipped with an install target, hence we do it ourselves.
diff --git a/pkgs/development/tools/analysis/oclgrind/default.nix b/pkgs/development/tools/analysis/oclgrind/default.nix
index 72154e909b6..edad1f0dd9e 100644
--- a/pkgs/development/tools/analysis/oclgrind/default.nix
+++ b/pkgs/development/tools/analysis/oclgrind/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, cmake, llvmPackages, readline, python }:
+{ lib, stdenv, fetchFromGitHub, cmake, llvmPackages, readline, python2 }:
 
 stdenv.mkDerivation rec {
   pname = "oclgrind";
@@ -12,7 +12,7 @@ stdenv.mkDerivation rec {
   };
 
   nativeBuildInputs = [ cmake ];
-  buildInputs = [ llvmPackages.llvm llvmPackages.clang-unwrapped readline python ];
+  buildInputs = [ llvmPackages.llvm llvmPackages.clang-unwrapped readline python2 ];
 
   cmakeFlags = [
     "-DCLANG_ROOT=${llvmPackages.clang-unwrapped}"
diff --git a/pkgs/development/tools/analysis/qcachegrind/default.nix b/pkgs/development/tools/analysis/qcachegrind/default.nix
index 1f7c6641b1c..6b238fb9266 100644
--- a/pkgs/development/tools/analysis/qcachegrind/default.nix
+++ b/pkgs/development/tools/analysis/qcachegrind/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, qmake, qtbase, perl, python, php, kcachegrind, wrapQtAppsHook }:
+{ lib, stdenv, qmake, qtbase, perl, python2, php, kcachegrind, wrapQtAppsHook }:
 
 let
   name = lib.replaceStrings ["kcachegrind"] ["qcachegrind"] kcachegrind.name;
@@ -8,7 +8,7 @@ in stdenv.mkDerivation {
 
   src = kcachegrind.src;
 
-  buildInputs = [ qtbase perl python php ];
+  buildInputs = [ qtbase perl python2 php ];
 
   nativeBuildInputs = [ qmake wrapQtAppsHook ];
 
diff --git a/pkgs/development/tools/database/pyrseas/default.nix b/pkgs/development/tools/database/pyrseas/default.nix
index 930078b2dc7..220554f95d9 100644
--- a/pkgs/development/tools/database/pyrseas/default.nix
+++ b/pkgs/development/tools/database/pyrseas/default.nix
@@ -1,7 +1,7 @@
-{ lib, pythonPackages, fetchFromGitHub }:
+{ lib, python2Packages, fetchFromGitHub }:
 
 let
-  pgdbconn = pythonPackages.buildPythonPackage rec {
+  pgdbconn = python2Packages.buildPythonPackage rec {
     pname = "pgdbconn";
     version = "0.8.0";
     src = fetchFromGitHub {
@@ -13,13 +13,13 @@ let
     # The tests are impure (they try to access a PostgreSQL server)
     doCheck = false;
     propagatedBuildInputs = [
-      pythonPackages.psycopg2
-      pythonPackages.pytest
+      python2Packages.psycopg2
+      python2Packages.pytest
     ];
   };
 in
 
-pythonPackages.buildPythonApplication {
+python2Packages.buildPythonApplication {
   pname = "pyrseas";
   version = "0.8.0";
   src = fetchFromGitHub {
@@ -31,9 +31,9 @@ pythonPackages.buildPythonApplication {
   # The tests are impure (they try to access a PostgreSQL server)
   doCheck = false;
   propagatedBuildInputs = [
-    pythonPackages.psycopg2
-    pythonPackages.pytest
-    pythonPackages.pyyaml
+    python2Packages.psycopg2
+    python2Packages.pytest
+    python2Packages.pyyaml
     pgdbconn
   ];
   meta = {
diff --git a/pkgs/development/tools/misc/uncrustify/default.nix b/pkgs/development/tools/misc/uncrustify/default.nix
index 759c83e81c8..64d299db155 100644
--- a/pkgs/development/tools/misc/uncrustify/default.nix
+++ b/pkgs/development/tools/misc/uncrustify/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, cmake, python }:
+{ lib, stdenv, fetchFromGitHub, cmake, python2 }:
 
 stdenv.mkDerivation rec {
   name = "${product}-${version}";
@@ -12,7 +12,7 @@ stdenv.mkDerivation rec {
     sha256 = "sha256-ZVC5tsn2m1uB7EPNJFPLWLZpLSk4WrFOgJvy1KFYqBY=";
   };
 
-  nativeBuildInputs = [ cmake python ];
+  nativeBuildInputs = [ cmake python2 ];
 
   meta = with lib; {
     description = "Source code beautifier for C, C++, C#, ObjectiveC, D, Java, Pawn and VALA";
diff --git a/pkgs/development/tools/phantomjs2/default.nix b/pkgs/development/tools/phantomjs2/default.nix
index 448e7dd4406..d9e4ec1fb19 100644
--- a/pkgs/development/tools/phantomjs2/default.nix
+++ b/pkgs/development/tools/phantomjs2/default.nix
@@ -1,6 +1,6 @@
 { lib, stdenv, fetchFromGitHub, fetchpatch
 , bison, flex, fontconfig, freetype, gperf, icu, openssl, libjpeg
-, libpng, perl, python, ruby, sqlite, qtwebkit, qmake, qtbase
+, libpng, perl, python2, ruby, sqlite, qtwebkit, qmake, qtbase
 , darwin, writeScriptBin, cups, makeWrapper
 }:
 
@@ -28,7 +28,7 @@ in stdenv.mkDerivation rec {
   nativeBuildInputs = [ qmake ];
   buildInputs = [
     bison flex fontconfig freetype gperf icu openssl
-    libjpeg libpng perl python ruby sqlite qtwebkit qtbase
+    libjpeg libpng perl python2 ruby sqlite qtwebkit qtbase
     makeWrapper
   ] ++ lib.optionals stdenv.isDarwin (with darwin.apple_sdk.frameworks; [
     AGL ApplicationServices AppKit Cocoa OpenGL
diff --git a/pkgs/development/tools/udis86/default.nix b/pkgs/development/tools/udis86/default.nix
index 1885d1a4322..dd4ad058c8d 100644
--- a/pkgs/development/tools/udis86/default.nix
+++ b/pkgs/development/tools/udis86/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, autoreconfHook, python }:
+{ lib, stdenv, fetchFromGitHub, autoreconfHook, python2 }:
 
 stdenv.mkDerivation rec {
   pname = "udis86";
@@ -11,7 +11,7 @@ stdenv.mkDerivation rec {
     sha256 = "0c60zwimim6jrm4saw36s38w5sg5v8n9mr58pkqmjrlf7q9g6am1";
   };
 
-  nativeBuildInputs = [ autoreconfHook python ];
+  nativeBuildInputs = [ autoreconfHook python2 ];
 
   configureFlags = [
     "--enable-shared"
diff --git a/pkgs/development/tools/winpdb/default.nix b/pkgs/development/tools/winpdb/default.nix
index 352dc83f9ab..58fef12cd6e 100644
--- a/pkgs/development/tools/winpdb/default.nix
+++ b/pkgs/development/tools/winpdb/default.nix
@@ -1,6 +1,6 @@
-{ lib, fetchurl, pythonPackages, makeDesktopItem }:
+{ lib, fetchurl, python2Packages, makeDesktopItem }:
 
-pythonPackages.buildPythonApplication rec {
+python2Packages.buildPythonApplication rec {
   pname = "winpdb";
   version = "1.4.8";
   namePrefix = "";
@@ -10,7 +10,7 @@ pythonPackages.buildPythonApplication rec {
     sha256 = "0vkpd24r40j928vc04c721innv0168sbllg97v4zw10adm24d8fs";
   };
 
-  propagatedBuildInputs = [ pythonPackages.wxPython ];
+  propagatedBuildInputs = [ python2Packages.wxPython ];
 
   desktopItem = makeDesktopItem {
     name = "winpdb";
diff --git a/pkgs/games/openra/common.nix b/pkgs/games/openra/common.nix
index 41c903e1011..01bd44ee244 100644
--- a/pkgs/games/openra/common.nix
+++ b/pkgs/games/openra/common.nix
@@ -2,7 +2,7 @@
     and out-of-tree mod packages (mod.nix).
 */
 { lib, makeSetupHook, curl, unzip, dos2unix, pkg-config, makeWrapper
-, lua, mono, dotnetPackages, python
+, lua, mono, dotnetPackages, python2
 , libGL, freetype, openal, SDL2
 , zenity
 }:
@@ -10,7 +10,7 @@
 with lib;
 
 let
-  path = makeBinPath ([ mono python ] ++ optional (zenity != null) zenity);
+  path = makeBinPath ([ mono python2 ] ++ optional (zenity != null) zenity);
   rpath = makeLibraryPath [ lua freetype openal SDL2 ];
   mkdirp = makeSetupHook { } ./mkdirp.sh;
 
@@ -66,7 +66,7 @@ in {
       makeWrapper
       mkdirp
       mono
-      python
+      python2
     ];
 
     makeFlags = [ "prefix=$(out)" ];
diff --git a/pkgs/games/tennix/default.nix b/pkgs/games/tennix/default.nix
index f81ddb7edf9..809ed7a146d 100644
--- a/pkgs/games/tennix/default.nix
+++ b/pkgs/games/tennix/default.nix
@@ -1,4 +1,4 @@
-{lib, stdenv, fetchurl, SDL, SDL_mixer, SDL_image, SDL_ttf, SDL_net, python } :
+{lib, stdenv, fetchurl, SDL, SDL_mixer, SDL_image, SDL_ttf, SDL_net, python2 } :
 
 stdenv.mkDerivation rec {
   pname = "tennix";
@@ -8,7 +8,7 @@ stdenv.mkDerivation rec {
     sha256 = "0np5kw1y7i0z0dsqx4r2nvmq86qj8hv3mmgavm3hxraqnds5z8cm";
   };
 
-  buildInputs = [ python SDL SDL_mixer SDL_image SDL_ttf SDL_net ];
+  buildInputs = [ python2 SDL SDL_mixer SDL_image SDL_ttf SDL_net ];
 
   patches = [ ./fix_FTBFS.patch ];
 
diff --git a/pkgs/misc/emulators/retrofe/default.nix b/pkgs/misc/emulators/retrofe/default.nix
index 558b5ca6337..dc1a23f33b3 100644
--- a/pkgs/misc/emulators/retrofe/default.nix
+++ b/pkgs/misc/emulators/retrofe/default.nix
@@ -1,5 +1,5 @@
 { lib, stdenv, fetchhg, cmake, glib, gst_all_1, makeWrapper, pkg-config
-, python, SDL2, SDL2_image, SDL2_mixer, SDL2_ttf, sqlite, zlib, runtimeShell
+, python2, SDL2, SDL2_image, SDL2_mixer, SDL2_ttf, sqlite, zlib, runtimeShell
 }:
 
 stdenv.mkDerivation {
@@ -12,7 +12,7 @@ stdenv.mkDerivation {
     sha256 = "0cvsg07ff0fdqh5zgiv2fs7s6c98hn150kpxmpw5fn6jilaszwkm";
   };
 
-  nativeBuildInputs = [ cmake makeWrapper pkg-config python ];
+  nativeBuildInputs = [ cmake makeWrapper pkg-config python2 ];
 
   buildInputs = [
     glib gst_all_1.gstreamer SDL2 SDL2_image SDL2_mixer SDL2_ttf sqlite zlib
diff --git a/pkgs/misc/emulators/wxmupen64plus/default.nix b/pkgs/misc/emulators/wxmupen64plus/default.nix
index 3b24584f7e6..c09a83b92ea 100644
--- a/pkgs/misc/emulators/wxmupen64plus/default.nix
+++ b/pkgs/misc/emulators/wxmupen64plus/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, python, wxGTK29, mupen64plus, SDL, libX11, libGLU, libGL
+{ lib, stdenv, fetchurl, python2, wxGTK29, mupen64plus, SDL, libX11, libGLU, libGL
 , wafHook }:
 
 stdenv.mkDerivation rec {
@@ -11,7 +11,7 @@ stdenv.mkDerivation rec {
   };
 
   nativeBuildInputs = [ wafHook ];
-  buildInputs = [ python wxGTK29 SDL libX11 libGLU libGL ];
+  buildInputs = [ python2 wxGTK29 SDL libX11 libGLU libGL ];
 
   preConfigure = ''
     tar xf ${mupen64plus.src}
diff --git a/pkgs/misc/screensavers/xtrlock-pam/default.nix b/pkgs/misc/screensavers/xtrlock-pam/default.nix
index 6908429e21b..ffb9d0da857 100644
--- a/pkgs/misc/screensavers/xtrlock-pam/default.nix
+++ b/pkgs/misc/screensavers/xtrlock-pam/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchgit, python, pkg-config, xlibsWrapper, pam }:
+{ lib, stdenv, fetchgit, python2, pkg-config, xlibsWrapper, pam }:
 
 stdenv.mkDerivation {
   pname = "xtrlock-pam";
@@ -11,7 +11,7 @@ stdenv.mkDerivation {
   };
 
   nativeBuildInputs = [ pkg-config ];
-  buildInputs = [ python xlibsWrapper pam ];
+  buildInputs = [ python2 xlibsWrapper pam ];
 
   configurePhase = ''
     substituteInPlace .config/options.py --replace /usr/include/security/pam_appl.h ${pam}/include/security/pam_appl.h
diff --git a/pkgs/misc/vim-plugins/overrides.nix b/pkgs/misc/vim-plugins/overrides.nix
index 1f210717c0b..7d8dc0a3099 100644
--- a/pkgs/misc/vim-plugins/overrides.nix
+++ b/pkgs/misc/vim-plugins/overrides.nix
@@ -10,7 +10,7 @@
 , substituteAll
 
   # Language dependencies
-, python
+, python2
 , python3
 , rustPlatform
 
@@ -184,7 +184,7 @@ self: super: {
   });
 
   ctrlp-cmatcher = super.ctrlp-cmatcher.overrideAttrs (old: {
-    buildInputs = [ python ];
+    buildInputs = [ python2 ];
     buildPhase = ''
       patchShebangs .
       ./install.sh
@@ -862,7 +862,7 @@ self: super: {
   vim-isort = super.vim-isort.overrideAttrs (old: {
     postPatch = ''
       substituteInPlace ftplugin/python_vimisort.vim \
-        --replace 'import vim' 'import vim; import sys; sys.path.append("${python.pkgs.isort}/${python.sitePackages}")'
+        --replace 'import vim' 'import vim; import sys; sys.path.append("${python2.pkgs.isort}/${python2.sitePackages}")'
     '';
   });
 
@@ -916,7 +916,7 @@ self: super: {
   });
 
   vim-wakatime = super.vim-wakatime.overrideAttrs (old: {
-    buildInputs = [ python ];
+    buildInputs = [ python2 ];
   });
 
   vim-xdebug = super.vim-xdebug.overrideAttrs (old: {
diff --git a/pkgs/os-specific/linux/pam_usb/default.nix b/pkgs/os-specific/linux/pam_usb/default.nix
index 8411c4fdbfa..0091accd57a 100644
--- a/pkgs/os-specific/linux/pam_usb/default.nix
+++ b/pkgs/os-specific/linux/pam_usb/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, makeWrapper, dbus, libxml2, pam, pkg-config, pmount, pythonPackages, writeScript, runtimeShell }:
+{ lib, stdenv, fetchurl, makeWrapper, dbus, libxml2, pam, pkg-config, pmount, python2Packages, writeScript, runtimeShell }:
 
 let
 
@@ -29,7 +29,7 @@ let
 
   pmountBin = useSetUID pmount "/bin/pmount";
   pumountBin = useSetUID pmount "/bin/pumount";
-  inherit (pythonPackages) python dbus-python;
+  inherit (python2Packages) python dbus-python;
 in
 
 stdenv.mkDerivation rec {
diff --git a/pkgs/os-specific/linux/pflask/default.nix b/pkgs/os-specific/linux/pflask/default.nix
index 92294b58e42..ba525c1a387 100644
--- a/pkgs/os-specific/linux/pflask/default.nix
+++ b/pkgs/os-specific/linux/pflask/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, python, wafHook }:
+{ lib, stdenv, fetchFromGitHub, python2, wafHook }:
 
 stdenv.mkDerivation rec {
   pname = "pflask";
@@ -12,7 +12,7 @@ stdenv.mkDerivation rec {
   };
 
   nativeBuildInputs = [ wafHook ];
-  buildInputs = [ python ];
+  buildInputs = [ python2 ];
 
   meta = {
     description = "Lightweight process containers for Linux";
diff --git a/pkgs/os-specific/linux/smem/default.nix b/pkgs/os-specific/linux/smem/default.nix
index cace3e22ae7..b2636382aec 100644
--- a/pkgs/os-specific/linux/smem/default.nix
+++ b/pkgs/os-specific/linux/smem/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, python }:
+{ lib, stdenv, fetchurl, python2 }:
 
 stdenv.mkDerivation rec {
   pname = "smem";
@@ -9,7 +9,7 @@ stdenv.mkDerivation rec {
     sha256 = "19ibv1byxf2b68186ysrgrhy5shkc5mc69abark1h18yigp3j34m";
   };
 
-  buildInputs = [ python ];
+  buildInputs = [ python2 ];
 
   makeFlags = [ "smemcap" ];
 
diff --git a/pkgs/os-specific/linux/speedometer/default.nix b/pkgs/os-specific/linux/speedometer/default.nix
index 2801334688b..2802fddf8ce 100644
--- a/pkgs/os-specific/linux/speedometer/default.nix
+++ b/pkgs/os-specific/linux/speedometer/default.nix
@@ -1,6 +1,6 @@
-{ lib, fetchurl, pythonPackages }:
+{ lib, fetchurl, python2Packages }:
 
-pythonPackages.buildPythonApplication rec {
+python2Packages.buildPythonApplication rec {
   pname = "speedometer";
   version = "2.8";
 
@@ -9,7 +9,7 @@ pythonPackages.buildPythonApplication rec {
     sha256 = "060bikv3gwr203jbdmvawsfhc0yq0bg1m42dk8czx1nqvwvgv6fm";
   };
 
-  propagatedBuildInputs = [ pythonPackages.urwid ];
+  propagatedBuildInputs = [ python2Packages.urwid ];
 
   postPatch = ''
     sed -i "/'entry_points': {/d" setup.py
diff --git a/pkgs/os-specific/linux/x86info/default.nix b/pkgs/os-specific/linux/x86info/default.nix
index dbda35670f6..e842b59651e 100644
--- a/pkgs/os-specific/linux/x86info/default.nix
+++ b/pkgs/os-specific/linux/x86info/default.nix
@@ -1,4 +1,4 @@
-{lib, stdenv, fetchurl, pciutils, python}:
+{lib, stdenv, fetchurl, pciutils, python2}:
 
 stdenv.mkDerivation rec {
   version = "1.30";
@@ -16,7 +16,7 @@ stdenv.mkDerivation rec {
     sed -i 's/-Werror -Wall//' Makefile
   '';
 
-  buildInputs = [ pciutils python ];
+  buildInputs = [ pciutils python2 ];
 
   installPhase = ''
     mkdir -p $out/bin
diff --git a/pkgs/servers/amqp/rabbitmq-server/default.nix b/pkgs/servers/amqp/rabbitmq-server/default.nix
index a8b837c8b3e..a5b36ad5c4a 100644
--- a/pkgs/servers/amqp/rabbitmq-server/default.nix
+++ b/pkgs/servers/amqp/rabbitmq-server/default.nix
@@ -3,7 +3,7 @@
 , fetchurl
 , erlang
 , elixir
-, python
+, python2
 , libxml2
 , libxslt
 , xmlto
@@ -36,7 +36,7 @@ stdenv.mkDerivation rec {
   };
 
   nativeBuildInputs = [ unzip xmlto docbook_xml_dtd_45 docbook_xsl zip rsync ];
-  buildInputs = [ erlang elixir python libxml2 libxslt glibcLocales ]
+  buildInputs = [ erlang elixir python2 libxml2 libxslt glibcLocales ]
     ++ lib.optionals stdenv.isDarwin [ AppKit Carbon Cocoa ];
 
   outputs = [ "out" "man" "doc" ];
diff --git a/pkgs/servers/computing/storm/default.nix b/pkgs/servers/computing/storm/default.nix
index 146db2ea5de..cf6427c860c 100644
--- a/pkgs/servers/computing/storm/default.nix
+++ b/pkgs/servers/computing/storm/default.nix
@@ -1,5 +1,5 @@
 { stdenv, lib, fetchurl, zip, unzip
-, jdk, python
+, jdk, python2
 , confFile ? ""
 , extraLibraryPaths ? []
 , extraJars ? []
@@ -30,11 +30,11 @@ stdenv.mkDerivation rec {
   fixupPhase = ''
     # Fix python reference
     sed -i \
-      -e '19iPYTHON=${python}/bin/python' \
-      -e 's|#!/usr/bin/.*python|#!${python}/bin/python|' \
+      -e '19iPYTHON=${python2}/bin/python' \
+      -e 's|#!/usr/bin/.*python|#!${python2}/bin/python|' \
       $out/bin/storm
     sed -i \
-      -e 's|#!/usr/bin/.*python|#!${python}/bin/python|' \
+      -e 's|#!/usr/bin/.*python|#!${python2}/bin/python|' \
       -e "s|STORM_CONF_DIR = .*|STORM_CONF_DIR = os.getenv('STORM_CONF_DIR','$out/conf')|" \
       -e 's|STORM_LOG4J2_CONF_DIR =.*|STORM_LOG4J2_CONF_DIR = os.path.join(STORM_CONF_DIR, "log4j2")|' \
         $out/bin/storm.py
diff --git a/pkgs/servers/mapserver/default.nix b/pkgs/servers/mapserver/default.nix
index 4735264f0a9..f8b0d8196fa 100644
--- a/pkgs/servers/mapserver/default.nix
+++ b/pkgs/servers/mapserver/default.nix
@@ -1,7 +1,7 @@
 { lib, stdenv, fetchFromGitHub, cmake, pkg-config
 , cairo, curl, fcgi, freetype, fribidi, gdal, geos, giflib, harfbuzz
 , libjpeg, libpng, librsvg, libxml2, postgresql, proj, protobufc, zlib
-, withPython ? true, swig, python
+, withPython ? true, swig, python2
 }:
 
 stdenv.mkDerivation rec {
@@ -38,7 +38,7 @@ stdenv.mkDerivation rec {
     proj
     protobufc
     zlib
-  ] ++ lib.optional withPython python;
+  ] ++ lib.optional withPython python2;
 
   cmakeFlags = [
     "-DWITH_KML=ON"
diff --git a/pkgs/servers/sql/proxysql/default.nix b/pkgs/servers/sql/proxysql/default.nix
index 078ebfb7b6e..142dfe29fa2 100644
--- a/pkgs/servers/sql/proxysql/default.nix
+++ b/pkgs/servers/sql/proxysql/default.nix
@@ -25,7 +25,7 @@
 , pcre
 , perl
 , prometheus-cpp
-, python
+, python2
 , re2
 , zlib
 }:
@@ -56,7 +56,7 @@ stdenv.mkDerivation rec {
     cmake
     libtool
     perl
-    python
+    python2
   ];
 
   buildInputs = [
diff --git a/pkgs/servers/tvheadend/default.nix b/pkgs/servers/tvheadend/default.nix
index 6c853b1ccc8..64e8d423d91 100644
--- a/pkgs/servers/tvheadend/default.nix
+++ b/pkgs/servers/tvheadend/default.nix
@@ -1,5 +1,5 @@
 { lib, stdenv, fetchFromGitHub, cmake, makeWrapper, pkg-config
-, avahi, dbus, gettext, git, gnutar, gzip, bzip2, ffmpeg_4, libiconv, openssl, python
+, avahi, dbus, gettext, git, gnutar, gzip, bzip2, ffmpeg_4, libiconv, openssl, python2
 , v4l-utils, which, zlib }:
 
 let
@@ -29,7 +29,7 @@ in stdenv.mkDerivation {
   };
 
   buildInputs = [
-    avahi dbus gettext git gnutar gzip bzip2 ffmpeg_4 libiconv openssl python
+    avahi dbus gettext git gnutar gzip bzip2 ffmpeg_4 libiconv openssl python2
     which zlib
   ];
 
diff --git a/pkgs/shells/zsh/zsh-git-prompt/default.nix b/pkgs/shells/zsh/zsh-git-prompt/default.nix
index 7fb2d786193..6af5fe7cc66 100644
--- a/pkgs/shells/zsh/zsh-git-prompt/default.nix
+++ b/pkgs/shells/zsh/zsh-git-prompt/default.nix
@@ -25,7 +25,7 @@
 # installed.
 #
 { fetchFromGitHub
-, python
+, python2
 , git
 , lib
 , haskellPackages
@@ -45,7 +45,7 @@ haskellPackages.callPackage
      prePatch = ''
         substituteInPlace zshrc.sh                       \
           --replace ':-"python"' ':-"haskell"'           \
-          --replace 'python '    '${python.interpreter} ' \
+          --replace 'python '    '${python2.interpreter} ' \
           --replace 'git '       '${git}/bin/git '
      '';
      preCompileBuildDriver = "cd src";
diff --git a/pkgs/tools/filesystems/xtreemfs/default.nix b/pkgs/tools/filesystems/xtreemfs/default.nix
index 9c49c4677d2..5825f8b25ee 100644
--- a/pkgs/tools/filesystems/xtreemfs/default.nix
+++ b/pkgs/tools/filesystems/xtreemfs/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, boost, fuse, openssl, cmake, attr, jdk, ant, which, file, python
+{ stdenv, boost, fuse, openssl, cmake, attr, jdk, ant, which, file, python2
 , lib, valgrind, makeWrapper, fetchFromGitHub, fetchpatch }:
 
 stdenv.mkDerivation {
@@ -14,7 +14,7 @@ stdenv.mkDerivation {
   version = "1.5.1.81";
 
   nativeBuildInputs = [ makeWrapper ];
-  buildInputs = [ which attr python ];
+  buildInputs = [ which attr python2 ];
 
   patches = [
     (fetchpatch {
diff --git a/pkgs/tools/misc/grub/trusted.nix b/pkgs/tools/misc/grub/trusted.nix
index edb94891fbe..13f3c42faa4 100644
--- a/pkgs/tools/misc/grub/trusted.nix
+++ b/pkgs/tools/misc/grub/trusted.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, fetchgit, fetchpatch, autogen, flex, bison, python, autoconf, automake
+{ lib, stdenv, fetchurl, fetchgit, fetchpatch, autogen, flex, bison, python2, autoconf, automake
 , gettext, ncurses, libusb-compat-0_1, freetype, qemu, lvm2
 , for_HP_laptop ? false
 }:
@@ -44,7 +44,7 @@ stdenv.mkDerivation rec {
           sha256 = "0yrfwx67gpg9gij5raq0cfbx3jj769lkg3diqgb7i9n86hgcdh4k";
         };
 
-  nativeBuildInputs = [ autogen flex bison python autoconf automake ];
+  nativeBuildInputs = [ autogen flex bison python2 autoconf automake ];
   buildInputs = [ ncurses libusb-compat-0_1 freetype gettext lvm2 ]
     ++ optional doCheck qemu;
 
diff --git a/pkgs/tools/misc/opentsdb/default.nix b/pkgs/tools/misc/opentsdb/default.nix
index bc7baa55fec..bffcd5e1dca 100644
--- a/pkgs/tools/misc/opentsdb/default.nix
+++ b/pkgs/tools/misc/opentsdb/default.nix
@@ -1,5 +1,5 @@
 { lib, stdenv, autoconf, automake, curl, fetchurl, fetchpatch, jdk8, makeWrapper, nettools
-, python, git
+, python2, git
 }:
 
 let jdk = jdk8; jre = jdk8.jre; in
@@ -22,7 +22,7 @@ stdenv.mkDerivation rec {
   ];
 
   nativeBuildInputs = [ makeWrapper ];
-  buildInputs = [ autoconf automake curl jdk nettools python git ];
+  buildInputs = [ autoconf automake curl jdk nettools python2 git ];
 
   preConfigure = ''
     patchShebangs ./build-aux/
diff --git a/pkgs/tools/misc/rpm-ostree/default.nix b/pkgs/tools/misc/rpm-ostree/default.nix
index bfc2ce2c0e9..4dd19a7f397 100644
--- a/pkgs/tools/misc/rpm-ostree/default.nix
+++ b/pkgs/tools/misc/rpm-ostree/default.nix
@@ -29,7 +29,7 @@
 , bubblewrap
 , pcre
 , check
-, python
+, python2
 , json_c
 , zchunk
 , libmodulemd
@@ -82,7 +82,7 @@ stdenv.mkDerivation rec {
     librepo
     pcre
     check
-    python
+    python2
 
     # libdnf # vendored unstable branch
     # required by vendored libdnf
diff --git a/pkgs/tools/misc/snapper/default.nix b/pkgs/tools/misc/snapper/default.nix
index 37361abf2b2..80d9e191c8a 100644
--- a/pkgs/tools/misc/snapper/default.nix
+++ b/pkgs/tools/misc/snapper/default.nix
@@ -1,7 +1,7 @@
 { lib, stdenv, fetchFromGitHub
 , autoreconfHook, pkg-config, docbook_xsl, libxslt, docbook_xml_dtd_45
 , acl, attr, boost, btrfs-progs, dbus, diffutils, e2fsprogs, libxml2
-, lvm2, pam, python, util-linux, json_c, nixosTests
+, lvm2, pam, python2, util-linux, json_c, nixosTests
 , ncurses }:
 
 stdenv.mkDerivation rec {
@@ -21,7 +21,7 @@ stdenv.mkDerivation rec {
   ];
   buildInputs = [
     acl attr boost btrfs-progs dbus diffutils e2fsprogs libxml2
-    lvm2 pam python util-linux json_c ncurses
+    lvm2 pam python2 util-linux json_c ncurses
   ];
 
   passthru.tests.snapper = nixosTests.snapper;
diff --git a/pkgs/tools/networking/nss-pam-ldapd/default.nix b/pkgs/tools/networking/nss-pam-ldapd/default.nix
index e112b8c1df1..3c6eff4d601 100644
--- a/pkgs/tools/networking/nss-pam-ldapd/default.nix
+++ b/pkgs/tools/networking/nss-pam-ldapd/default.nix
@@ -1,6 +1,6 @@
 { lib, stdenv, fetchurl
 , pkg-config, makeWrapper, autoreconfHook
-, openldap, python, pam
+, openldap, python2, pam
 }:
 
 stdenv.mkDerivation rec {
@@ -13,7 +13,7 @@ stdenv.mkDerivation rec {
   };
 
   nativeBuildInputs = [ pkg-config makeWrapper autoreconfHook ];
-  buildInputs = [ openldap pam python ];
+  buildInputs = [ openldap pam python2 ];
 
   preConfigure = ''
     substituteInPlace Makefile.in --replace "install-data-local: " "# install-data-local: "
diff --git a/pkgs/tools/networking/philter/default.nix b/pkgs/tools/networking/philter/default.nix
index 60bd2f8cc7e..dc447f3a86b 100644
--- a/pkgs/tools/networking/philter/default.nix
+++ b/pkgs/tools/networking/philter/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, python }:
+{ lib, stdenv, fetchurl, python2 }:
 
 stdenv.mkDerivation rec {
   pname = "philter";
@@ -11,7 +11,7 @@ stdenv.mkDerivation rec {
   installPhase = ''
     mkdir -p "$out"/{bin,share/philter}
     cp .philterrc "$out"/share/philter/philterrc
-    sed -i 's@/usr/local/bin@${python}/bin@' src/philter.py
+    sed -i 's@/usr/local/bin@${python2}/bin@' src/philter.py
     cp src/philter.py "$out"/bin/philter
     chmod +x "$out"/bin/philter
   '';
diff --git a/pkgs/tools/networking/pssh/default.nix b/pkgs/tools/networking/pssh/default.nix
index a17701644c8..1d7d006f537 100644
--- a/pkgs/tools/networking/pssh/default.nix
+++ b/pkgs/tools/networking/pssh/default.nix
@@ -1,6 +1,6 @@
-{ lib, fetchFromGitHub, pythonPackages, openssh, rsync }:
+{ lib, fetchFromGitHub, python2Packages, openssh, rsync }:
 
-pythonPackages.buildPythonApplication rec {
+python2Packages.buildPythonApplication rec {
   pname = "pssh";
   version = "2.3.1";
 
diff --git a/pkgs/tools/networking/py-wmi-client/default.nix b/pkgs/tools/networking/py-wmi-client/default.nix
index 7a277400289..8f5958193db 100644
--- a/pkgs/tools/networking/py-wmi-client/default.nix
+++ b/pkgs/tools/networking/py-wmi-client/default.nix
@@ -1,6 +1,6 @@
-{ lib, pythonPackages, fetchFromGitHub }:
+{ lib, python2Packages, fetchFromGitHub }:
 
-pythonPackages.buildPythonApplication rec {
+python2Packages.buildPythonApplication rec {
   pname = "py-wmi-client";
   version = "unstable-20160601";
 
@@ -11,7 +11,7 @@ pythonPackages.buildPythonApplication rec {
     sha256 = "1kd12gi1knqv477f1shzqr0h349s5336vzp3fpfp3xl0b502ld8d";
   };
 
-  propagatedBuildInputs = with pythonPackages; [ impacket natsort pyasn1 pycrypto ];
+  propagatedBuildInputs = with python2Packages; [ impacket natsort pyasn1 pycrypto ];
 
   # no tests
   doCheck = false;
diff --git a/pkgs/tools/networking/weighttp/default.nix b/pkgs/tools/networking/weighttp/default.nix
index 7c3d23c0d17..7a26ffdeb43 100644
--- a/pkgs/tools/networking/weighttp/default.nix
+++ b/pkgs/tools/networking/weighttp/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchgit, python, libev, wafHook }:
+{ lib, stdenv, fetchgit, python2, libev, wafHook }:
 
 stdenv.mkDerivation rec {
   pname = "weighttp";
@@ -12,7 +12,7 @@ stdenv.mkDerivation rec {
 
   nativeBuildInputs = [ wafHook ];
 
-  buildInputs = [ python libev ];
+  buildInputs = [ python2 libev ];
 
   meta = with lib; {
     description = "Lightweight and simple webserver benchmarking tool";
diff --git a/pkgs/tools/security/volatility/default.nix b/pkgs/tools/security/volatility/default.nix
index 4abbbd2d1d1..9c73f8a0019 100644
--- a/pkgs/tools/security/volatility/default.nix
+++ b/pkgs/tools/security/volatility/default.nix
@@ -1,6 +1,6 @@
-{ lib, fetchFromGitHub, pythonPackages }:
+{ lib, fetchFromGitHub, python2Packages }:
 
-pythonPackages.buildPythonApplication rec {
+python2Packages.buildPythonApplication rec {
   pname = "volatility";
   version = "2.6.1";
 
@@ -13,7 +13,7 @@ pythonPackages.buildPythonApplication rec {
 
   doCheck = false;
 
-  propagatedBuildInputs = with pythonPackages; [ pycrypto distorm3 pillow ];
+  propagatedBuildInputs = with python2Packages; [ pycrypto distorm3 pillow ];
 
   meta = with lib; {
     homepage = "https://www.volatilityfoundation.org/";
diff --git a/pkgs/tools/system/collectd/plugins.nix b/pkgs/tools/system/collectd/plugins.nix
index 6438a545a48..de8948db6c9 100644
--- a/pkgs/tools/system/collectd/plugins.nix
+++ b/pkgs/tools/system/collectd/plugins.nix
@@ -31,7 +31,7 @@
 , perl
 , postgresql
 , protobufc
-, python
+, python2
 , rabbitmq-c
 , rdkafka
 , riemann_c_client
@@ -102,7 +102,7 @@ let
     pinba.buildInputs = [ protobufc ];
     ping.buildInputs = [ liboping ];
     postgresql.buildInputs = [ postgresql ];
-    python.buildInputs = [ python ];
+    python.buildInputs = [ python2 ];
     redis.buildInputs = [ hiredis ];
     rrdcached.buildInputs = [ rrdtool libxml2 ];
     rrdtool.buildInputs = [ rrdtool libxml2 ];
diff --git a/pkgs/tools/system/ps_mem/default.nix b/pkgs/tools/system/ps_mem/default.nix
index 1752aba240f..073a0921f98 100644
--- a/pkgs/tools/system/ps_mem/default.nix
+++ b/pkgs/tools/system/ps_mem/default.nix
@@ -1,9 +1,9 @@
-{ lib, pythonPackages, fetchFromGitHub }:
+{ lib, python2Packages, fetchFromGitHub }:
 
 let
   version = "3.13";
   pname = "ps_mem";
-in pythonPackages.buildPythonApplication {
+in python2Packages.buildPythonApplication {
   name = "${pname}-${version}";
 
   src = fetchFromGitHub {
diff --git a/pkgs/tools/system/syslog-ng-incubator/default.nix b/pkgs/tools/system/syslog-ng-incubator/default.nix
index 0f8db091d61..affb4bca6ce 100644
--- a/pkgs/tools/system/syslog-ng-incubator/default.nix
+++ b/pkgs/tools/system/syslog-ng-incubator/default.nix
@@ -1,5 +1,5 @@
 { lib, stdenv, fetchFromGitHub, autoreconfHook, pkg-config, glib, syslogng
-, eventlog, perl, python, bison, protobufc, libivykis, libcap, czmq
+, eventlog, perl, python2, bison, protobufc, libivykis, libcap, czmq
 }:
 
 stdenv.mkDerivation rec {
@@ -16,7 +16,7 @@ stdenv.mkDerivation rec {
   nativeBuildInputs = [ pkg-config autoreconfHook bison ];
 
   buildInputs = [
-    glib syslogng eventlog perl python protobufc libivykis libcap czmq
+    glib syslogng eventlog perl python2 protobufc libivykis libcap czmq
   ];
 
   configureFlags = [
diff --git a/pkgs/tools/system/syslog-ng/default.nix b/pkgs/tools/system/syslog-ng/default.nix
index 51f8cd94da1..d0a22203aa9 100644
--- a/pkgs/tools/system/syslog-ng/default.nix
+++ b/pkgs/tools/system/syslog-ng/default.nix
@@ -1,5 +1,5 @@
 { lib, stdenv, fetchurl, openssl, libcap, curl, which
-, eventlog, pkg-config, glib, python, systemd, perl
+, eventlog, pkg-config, glib, python2, systemd, perl
 , riemann_c_client, protobufc, pcre, libnet
 , json_c, libuuid, libivykis, mongoc, rabbitmq-c
 , libesmtp
@@ -23,7 +23,7 @@ stdenv.mkDerivation rec {
     eventlog
     glib
     perl
-    python
+    python2
     systemd
     riemann_c_client
     protobufc
diff --git a/pkgs/tools/text/opencc/default.nix b/pkgs/tools/text/opencc/default.nix
index cbb055323a6..5ad14295e87 100644
--- a/pkgs/tools/text/opencc/default.nix
+++ b/pkgs/tools/text/opencc/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, cmake, python }:
+{ lib, stdenv, fetchFromGitHub, cmake, python2 }:
 
 stdenv.mkDerivation rec {
   pname = "opencc";
@@ -11,7 +11,7 @@ stdenv.mkDerivation rec {
     sha256 = "sha256-q/y4tRov/BYCAiE4i7fT6ysTerxxOHMZUWT2Jlo/0rI=";
   };
 
-  nativeBuildInputs = [ cmake python ];
+  nativeBuildInputs = [ cmake python2 ];
 
   # let intermediate tools find intermediate library
   preBuild = lib.optionalString stdenv.isLinux ''
diff --git a/pkgs/tools/text/txt2tags/default.nix b/pkgs/tools/text/txt2tags/default.nix
index eb299caade9..9f237066d7c 100644
--- a/pkgs/tools/text/txt2tags/default.nix
+++ b/pkgs/tools/text/txt2tags/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, python }:
+{ lib, stdenv, fetchurl, python2 }:
 
 stdenv.mkDerivation rec {
   version = "2.6";
@@ -7,13 +7,13 @@ stdenv.mkDerivation rec {
   dontBuild = true;
 
   # Python script, needs the interpreter
-  propagatedBuildInputs = [ python ];
+  propagatedBuildInputs = [ python2 ];
 
   installPhase = ''
     mkdir -p "$out/bin"
     mkdir -p "$out/share/doc"
     mkdir -p "$out/share/man/man1/"
-    sed '1s|/usr/bin/env python|${python}/bin/python|' < txt2tags > "$out/bin/txt2tags"
+    sed '1s|/usr/bin/env python|${python2}/bin/python|' < txt2tags > "$out/bin/txt2tags"
     chmod +x "$out/bin/txt2tags"
     gzip - < doc/manpage.man > "$out/share/man/man1/txt2tags.1.gz"
     cp doc/userguide.pdf "$out/share/doc"
diff --git a/pkgs/tools/typesetting/odpdown/default.nix b/pkgs/tools/typesetting/odpdown/default.nix
index 85dcece956f..252167fcea9 100644
--- a/pkgs/tools/typesetting/odpdown/default.nix
+++ b/pkgs/tools/typesetting/odpdown/default.nix
@@ -1,6 +1,6 @@
-{ lib, fetchFromGitHub, pythonPackages, libreoffice }:
+{ lib, fetchFromGitHub, python2Packages, libreoffice }:
 
-pythonPackages.buildPythonApplication rec {
+python2Packages.buildPythonApplication rec {
 
   pname = "odpdown";
   version = "0.4.1";
@@ -12,9 +12,9 @@ pythonPackages.buildPythonApplication rec {
     sha256 = "r2qbgD9PAalbypt+vjp2YcYggUGPQMEG2FDxMtohqG4=";
   };
 
-  propagatedBuildInputs = with pythonPackages; [ libreoffice lpod lxml mistune pillow pygments ];
+  propagatedBuildInputs = with python2Packages; [ libreoffice lpod lxml mistune pillow pygments ];
 
-  checkInputs = with pythonPackages; [
+  checkInputs = with python2Packages; [
     nose
   ];
 
diff --git a/pkgs/tools/video/vnc2flv/default.nix b/pkgs/tools/video/vnc2flv/default.nix
index fdaf2ee2746..f32078f0b8a 100644
--- a/pkgs/tools/video/vnc2flv/default.nix
+++ b/pkgs/tools/video/vnc2flv/default.nix
@@ -1,6 +1,6 @@
-{ lib, fetchurl, pythonPackages }:
+{ lib, fetchurl, python2Packages }:
 
-pythonPackages.buildPythonApplication rec {
+python2Packages.buildPythonApplication rec {
   pname = "vnc2flv";
   version = "20100207";
 
diff --git a/pkgs/tools/virtualization/xe-guest-utilities/default.nix b/pkgs/tools/virtualization/xe-guest-utilities/default.nix
index ab3c9b1e71c..2497cc6a9df 100644
--- a/pkgs/tools/virtualization/xe-guest-utilities/default.nix
+++ b/pkgs/tools/virtualization/xe-guest-utilities/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, bzip2, lzo, zlib, xz, bash, python, gnutar, gnused, gnugrep, which }:
+{ lib, stdenv, fetchurl, bzip2, lzo, zlib, xz, bash, python2, gnutar, gnused, gnugrep, which }:
 
 stdenv.mkDerivation (rec {
   pname = "xe-guest-utilities";
@@ -14,7 +14,7 @@ stdenv.mkDerivation (rec {
     url = "https://sources.archlinux.org/other/community/xe-guest-utilities/xe-guest-utilities_${version}-1120.tar.gz";
     sha256 = "f9593cd9588188f80253e736f48d8dd94c5b517abb18316085f86acffab48794";
   };
-  buildInputs = [ bzip2 gnutar gnused python lzo zlib xz stdenv gnugrep which ];
+  buildInputs = [ bzip2 gnutar gnused python2 lzo zlib xz stdenv gnugrep which ];
   patches = [ ./ip-address.patch ];
   postPatch = ''
     tar xf "$NIX_BUILD_TOP/$name/xenstore-sources.tar.bz2"
diff --git a/pkgs/top-level/aliases.nix b/pkgs/top-level/aliases.nix
index 8b90cbf2b7e..e894bed7d38 100644
--- a/pkgs/top-level/aliases.nix
+++ b/pkgs/top-level/aliases.nix
@@ -817,8 +817,11 @@ mapAliases ({
   pyrex095 = throw "pyrex has been removed from nixpkgs as the project is still stuck on python2."; # added 2022-01-12
   pyrex096 = throw "pyrex has been removed from nixpkgs as the project is still stuck on python2."; # added 2022-01-12
   pyrit = throw "pyrit has been removed from nixpkgs as the project is still stuck on python2."; # added 2022-01-01
+  python = python2; # added 2022-01-11
   python2nix = throw "python2nix has been removed as it is outdated. Use e.g. nixpkgs-pytools instead."; # added 2021-03-08
   python-swiftclient = swiftclient; # added 2021-09-09
+  pythonFull = python2Full; # added 2022-01-11
+  pythonPackages = python.pkgs; # added 2022-01-11
   quagga = throw "quagga is no longer maintained upstream"; # added 2021-04-22
   qca-qt5 = libsForQt5.qca-qt5;  # added 2015-12-19
   qcsxcad = libsForQt5.qcsxcad;  # added 2020-11-05
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index e73d300fd21..3ade9523149 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -4660,7 +4660,7 @@ with pkgs;
   diffutils = callPackage ../tools/text/diffutils { };
 
   dir2opus = callPackage ../tools/audio/dir2opus {
-    inherit (pythonPackages) mutagen python wrapPython;
+    inherit (python2Packages) mutagen python wrapPython;
   };
 
   dirdiff = callPackage ../tools/text/dirdiff {
@@ -10696,7 +10696,7 @@ with pkgs;
     inherit (darwin.apple_sdk.frameworks) OpenCL;
   };
 
-  wakatime = pythonPackages.callPackage ../tools/misc/wakatime { };
+  wakatime = python2Packages.callPackage ../tools/misc/wakatime { };
 
   weather = callPackage ../applications/misc/weather { };
 
@@ -13652,7 +13652,6 @@ with pkgs;
   # Python interpreters. All standard library modules are included except for tkinter, which is
   # available as `pythonPackages.tkinter` and can be used as any other Python package.
   # When switching these sets, please update docs at ../../doc/languages-frameworks/python.md
-  python = python2;
   python2 = python27;
   python3 = python39;
   pypy = pypy2;
@@ -13661,11 +13660,6 @@ with pkgs;
 
   # Python interpreter that is build with all modules, including tkinter.
   # These are for compatibility and should not be used inside Nixpkgs.
-  pythonFull = python.override {
-    self = pythonFull;
-    pythonAttr = "pythonFull";
-    x11Support = true;
-  };
   python2Full = python2.override {
     self = python2Full;
     pythonAttr = "python2Full";
@@ -13702,7 +13696,6 @@ with pkgs;
   };
 
   # pythonPackages further below, but assigned here because they need to be in sync
-  pythonPackages = python.pkgs;
   python2Packages = python2.pkgs;
   python3Packages = python3.pkgs;
 
@@ -21685,7 +21678,7 @@ with pkgs;
 
   qpid-cpp = callPackage ../servers/amqp/qpid-cpp {
     boost = boost155;
-    inherit (pythonPackages) buildPythonPackage qpid-python;
+    inherit (python2Packages) buildPythonPackage qpid-python;
   };
 
   qremotecontrol-server = callPackage ../servers/misc/qremotecontrol-server { };
@@ -29017,9 +29010,7 @@ with pkgs;
 
   topydo = callPackage ../applications/misc/topydo {};
 
-  torchat = callPackage ../applications/networking/instant-messengers/torchat {
-    inherit (pythonPackages) wrapPython wxPython;
-  };
+  torchat = callPackage ../applications/networking/instant-messengers/torchat { };
 
   torrential = callPackage ../applications/networking/p2p/torrential { };
 
@@ -31701,7 +31692,7 @@ with pkgs;
     useMpi = true;
   });
 
-  neuron-full = neuron-mpi.override { inherit python; };
+  neuron-full = neuron-mpi.override { python = python2; };
 
   mrbayes = callPackage ../applications/science/biology/mrbayes { };
 
@@ -33204,7 +33195,7 @@ with pkgs;
 
   nix-script = callPackage ../tools/nix/nix-script {};
 
-  nix-template-rpm = callPackage ../build-support/templaterpm { inherit (pythonPackages) python toposort; };
+  nix-template-rpm = callPackage ../build-support/templaterpm { inherit (python2Packages) python toposort; };
 
   nix-top = callPackage ../tools/package-management/nix-top { };
 
@@ -33255,7 +33246,7 @@ with pkgs;
   disnix = callPackage ../tools/package-management/disnix { };
 
   dysnomia = callPackage ../tools/package-management/disnix/dysnomia (config.disnix or {
-    inherit (pythonPackages) supervisor;
+    inherit (python2Packages) supervisor;
   });
 
   dydisnix = callPackage ../tools/package-management/disnix/dydisnix { };
diff --git a/pkgs/top-level/python-packages.nix b/pkgs/top-level/python-packages.nix
index eef542e8def..c653a54a9fc 100644
--- a/pkgs/top-level/python-packages.nix
+++ b/pkgs/top-level/python-packages.nix
@@ -2746,14 +2746,14 @@ in {
 
   fastjet = toPythonModule (pkgs.fastjet.override {
     withPython = true;
-    inherit python;
+    inherit (self) python;
   });
 
   fastjsonschema = callPackage ../development/python-modules/fastjsonschema { };
 
   fastnlo_toolkit = toPythonModule (pkgs.fastnlo_toolkit.override {
     withPython = true;
-    inherit python;
+    inherit (self) python;
   });
 
   fastnumbers = callPackage ../development/python-modules/fastnumbers { };
diff --git a/pkgs/top-level/release.nix b/pkgs/top-level/release.nix
index 13526349dfc..62d2d5ed8c1 100644
--- a/pkgs/top-level/release.nix
+++ b/pkgs/top-level/release.nix
@@ -54,7 +54,7 @@ let
               jobs.openssl.x86_64-darwin
               jobs.pandoc.x86_64-darwin
               jobs.postgresql.x86_64-darwin
-              jobs.python.x86_64-darwin
+              jobs.python2.x86_64-darwin
               jobs.python3.x86_64-darwin
               jobs.ruby.x86_64-darwin
               jobs.rustc.x86_64-darwin
@@ -99,7 +99,7 @@ let
               jobs.go.x86_64-linux
               jobs.linux.x86_64-linux
               jobs.pandoc.x86_64-linux
-              jobs.python.x86_64-linux
+              jobs.python2.x86_64-linux
               jobs.python3.x86_64-linux
               # Needed by contributors to test PRs (by inclusion of the PR template)
               jobs.nixpkgs-review.x86_64-linux
@@ -134,7 +134,7 @@ let
               jobs.stdenv.x86_64-darwin
               jobs.cargo.x86_64-darwin
               jobs.go.x86_64-darwin
-              jobs.python.x86_64-darwin
+              jobs.python2.x86_64-darwin
               jobs.python3.x86_64-darwin
               jobs.nixpkgs-review.x86_64-darwin
               jobs.nix-info.x86_64-darwin