diff --git a/pkgs/development/python-modules/pyside/apiextractor.nix b/pkgs/development/python-modules/pyside/apiextractor.nix
index a27a365bb2cd..e02f32f223df 100644
--- a/pkgs/development/python-modules/pyside/apiextractor.nix
+++ b/pkgs/development/python-modules/pyside/apiextractor.nix
@@ -1,6 +1,9 @@
-{ stdenv, fetchurl, cmake, libxml2, libxslt, python, sphinx, qt4 }:
+{ stdenv, fetchurl, cmake, libxml2, libxslt, python2, qt4 }:
 
-stdenv.mkDerivation {
+# This derivation does not provide any Python module and should therefore be called via `all-packages.nix`.
+let
+  pythonEnv = python2.withPackages(ps: with ps; [  sphinx ]);
+in stdenv.mkDerivation {
   name = "pyside-apiextractor-0.10.10";
 
   src = fetchurl {
@@ -10,7 +13,7 @@ stdenv.mkDerivation {
 
   enableParallelBuilding = true;
 
-  buildInputs = [ cmake libxml2 libxslt sphinx qt4 ];
+  buildInputs = [ cmake qt4 pythonEnv libxml2 libxslt ];
 
   meta = {
     description = "Eases the development of bindings of Qt-based libraries for high level languages by automating most of the process";
diff --git a/pkgs/development/python-modules/pyside/default.nix b/pkgs/development/python-modules/pyside/default.nix
index 4aff09b8f8f5..009afdd3a030 100644
--- a/pkgs/development/python-modules/pyside/default.nix
+++ b/pkgs/development/python-modules/pyside/default.nix
@@ -1,5 +1,6 @@
 { lib, fetchurl, cmake, python, buildPythonPackage, pysideGeneratorrunner, pysideShiboken, qt4 }:
 
+# This derivation provides a Python module and should therefore be called via `python-packages.nix`.
 buildPythonPackage rec {
   name = "pyside-${version}";
   version = "1.2.4";
diff --git a/pkgs/development/python-modules/pyside/generatorrunner.nix b/pkgs/development/python-modules/pyside/generatorrunner.nix
index 28ea88ad1fa4..8ecf2734832a 100644
--- a/pkgs/development/python-modules/pyside/generatorrunner.nix
+++ b/pkgs/development/python-modules/pyside/generatorrunner.nix
@@ -1,7 +1,12 @@
-{ stdenv, fetchurl, cmake, pysideApiextractor, python, sphinx, qt4 }:
+{ stdenv, fetchurl, cmake, pysideApiextractor, python2, qt4 }:
 
-stdenv.mkDerivation {
-  name = "pyside-generatorrunner-0.6.16";
+# This derivation does not provide any Python module and should therefore be called via `all-packages.nix`.
+let
+  pythonEnv = python2.withPackages(ps: with ps; [ sphinx ]);
+in stdenv.mkDerivation rec {
+  pname = "pyside-generatorrunner";
+  version = "0.6.16";
+  name = "${pname}-${version}";
 
   src = fetchurl {
     url = "https://github.com/PySide/Generatorrunner/archive/0.6.16.tar.gz";
@@ -10,7 +15,7 @@ stdenv.mkDerivation {
 
   enableParallelBuilding = true;
 
-  buildInputs = [ cmake pysideApiextractor sphinx qt4 ];
+  buildInputs = [ cmake pysideApiextractor qt4 pythonEnv ];
 
   meta = {
     description = "Eases the development of binding generators for C++ and Qt-based libraries by providing a framework to help automating most of the process";
diff --git a/pkgs/development/python-modules/pyside/shiboken.nix b/pkgs/development/python-modules/pyside/shiboken.nix
index 8c91b63d0e11..cef78c215500 100644
--- a/pkgs/development/python-modules/pyside/shiboken.nix
+++ b/pkgs/development/python-modules/pyside/shiboken.nix
@@ -1,10 +1,14 @@
-{ stdenv, fetchurl, cmake, libxml2, libxslt, pysideApiextractor, pysideGeneratorrunner, python, sphinx, qt4, isPy3k, isPy35 }:
+{ lib, fetchurl, cmake, buildPythonPackage, libxml2, libxslt, pysideApiextractor, pysideGeneratorrunner, python, sphinx, qt4, isPy3k, isPy35 }:
 
+# This derivation provides a Python module and should therefore be called via `python-packages.nix`.
 # Python 3.5 is not supported: https://github.com/PySide/Shiboken/issues/77
-stdenv.mkDerivation rec {
-  name = "pyside-shiboken-${version}";
+buildPythonPackage rec {
+  name = "${pname}-${version}";
+  pname = "pyside-shiboken";
   version = "1.2.4";
 
+  format = "other";
+
   src = fetchurl {
     url = "https://github.com/PySide/Shiboken/archive/${version}.tar.gz";
     sha256 = "1536f73a3353296d97a25e24f9554edf3e6a48126886f8d21282c3645ecb96a4";
@@ -25,9 +29,9 @@ stdenv.mkDerivation rec {
 
   meta = {
     description = "Plugin (front-end) for pyside-generatorrunner, that generates bindings for C++ libraries using CPython source code";
-    license = stdenv.lib.licenses.gpl2;
+    license = lib.licenses.gpl2;
     homepage = "http://www.pyside.org/docs/shiboken/";
-    maintainers = [ stdenv.lib.maintainers.chaoflow ];
-    platforms = stdenv.lib.platforms.all;
+    maintainers = [ lib.maintainers.chaoflow ];
+    platforms = lib.platforms.all;
   };
 }
diff --git a/pkgs/development/python-modules/pyside/tools.nix b/pkgs/development/python-modules/pyside/tools.nix
index 11f2bd97175c..9d02a016e723 100644
--- a/pkgs/development/python-modules/pyside/tools.nix
+++ b/pkgs/development/python-modules/pyside/tools.nix
@@ -1,7 +1,11 @@
-{ stdenv, fetchurl, cmake, pyside, python, qt4, pysideShiboken }:
+{ lib, fetchurl, cmake, pyside, qt4, pysideShiboken, buildPythonPackage }:
 
-stdenv.mkDerivation {
-  name = "pyside-tools-0.2.15";
+# This derivation provides a Python module and should therefore be called via `python-packages.nix`.
+buildPythonPackage rec {
+  pname = "pyside-tools";
+  version = "0.2.15";
+  name = "${pname}-${version}";
+  format = "other";
 
   src = fetchurl {
     url = "https://github.com/PySide/Tools/archive/0.2.15.tar.gz";
@@ -10,13 +14,13 @@ stdenv.mkDerivation {
 
   enableParallelBuilding = true;
 
-  buildInputs = [ cmake pyside python qt4 pysideShiboken ];
+  buildInputs = [ cmake pyside qt4 pysideShiboken ];
 
   meta = {
     description = "Tools for pyside, the LGPL-licensed Python bindings for the Qt cross-platform application and UI framework";
-    license = stdenv.lib.licenses.gpl2;
+    license = lib.licenses.gpl2;
     homepage = "http://www.pyside.org";
-    maintainers = [ stdenv.lib.maintainers.chaoflow ];
-    platforms = stdenv.lib.platforms.all;
+    maintainers = [ lib.maintainers.chaoflow ];
+    platforms = lib.platforms.all;
   };
 }
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index feca045ebe17..f3d6104166bb 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -6124,6 +6124,11 @@ with pkgs;
     pythonPackages = python3Packages;
   };
 
+  # These pyside tools do not provide any Python modules and are meant to be here.
+  # See ../development/python-modules/pyside/default.nix for details.
+  pysideApiextractor = callPackage ../development/python-modules/pyside/apiextractor.nix { };
+  pysideGeneratorrunner = callPackage ../development/python-modules/pyside/generatorrunner.nix { };
+
   svg2tikz = python27Packages.svg2tikz;
 
   pyrex = pyrex095;
diff --git a/pkgs/top-level/python-packages.nix b/pkgs/top-level/python-packages.nix
index 92457ae67aba..06f778b7180f 100644
--- a/pkgs/top-level/python-packages.nix
+++ b/pkgs/top-level/python-packages.nix
@@ -49,8 +49,11 @@ let
       fetchSource = {pname, version, sha256}:
       # Fetch a source tarball.
         let
-          url = "mirror://pypi/${builtins.substring 0 1 pname}/${pname}/${pname}-${version}.tar.gz";
-        in pkgs.fetchurl {inherit url sha256;};
+          urls = [
+            "mirror://pypi/${builtins.substring 0 1 pname}/${pname}/${pname}-${version}.tar.gz"
+            "mirror://pypi/${builtins.substring 0 1 pname}/${pname}/${pname}-${version}.zip"
+          ];
+        in pkgs.fetchurl {inherit urls sha256;};
       fetcher = (if format == "wheel" then fetchWheel
         else if format == "setuptools" then fetchSource
         else throw "Unsupported kind ${kind}");
@@ -369,11 +372,9 @@ in {
 
   pyside = callPackage ../development/python-modules/pyside { };
 
-  pysideApiextractor = callPackage ../development/python-modules/pyside/apiextractor.nix { };
-
-  pysideGeneratorrunner = callPackage ../development/python-modules/pyside/generatorrunner.nix { };
-
-  pysideShiboken = callPackage ../development/python-modules/pyside/shiboken.nix { };
+  pysideShiboken = callPackage ../development/python-modules/pyside/shiboken.nix {
+    inherit (pkgs) libxml2 libxslt; # Do not need the Python bindings.
+  };
 
   pysideTools = callPackage ../development/python-modules/pyside/tools.nix { };