diff --git a/pkgs/applications/audio/gtklick/default.nix b/pkgs/applications/audio/gtklick/default.nix
index 0434b00c7053..b653ae5ca588 100644
--- a/pkgs/applications/audio/gtklick/default.nix
+++ b/pkgs/applications/audio/gtklick/default.nix
@@ -14,7 +14,7 @@ pythonPackages.buildPythonApplication rec {
     pyGtkGlade
   ];
 
-  buildInputs = [ gettext ];
+  nativeBuildInputs = [ gettext ];
 
   propagatedBuildInputs = [ klick ];
 
diff --git a/pkgs/applications/audio/lollypop/default.nix b/pkgs/applications/audio/lollypop/default.nix
index 03d27177656a..a285663d8cea 100644
--- a/pkgs/applications/audio/lollypop/default.nix
+++ b/pkgs/applications/audio/lollypop/default.nix
@@ -28,6 +28,7 @@ python3.pkgs.buildPythonApplication rec  {
   ];
 
   buildInputs = with gst_all_1; [
+    gobject-introspection
     gst-libav
     gst-plugins-bad
     gst-plugins-base
diff --git a/pkgs/applications/audio/picard/default.nix b/pkgs/applications/audio/picard/default.nix
index 915b7d0cbb50..421c9eaac372 100644
--- a/pkgs/applications/audio/picard/default.nix
+++ b/pkgs/applications/audio/picard/default.nix
@@ -13,7 +13,7 @@ in pythonPackages.buildPythonApplication rec {
     sha256 = "1p2bvfzby0nk1vh04yfmsvjcldgkj6m6s1hcv9v13hc8q1cbdfk5";
   };
 
-  buildInputs = [ gettext ];
+  nativeBuildInputs = [ gettext ];
 
   propagatedBuildInputs = with pythonPackages; [
     pyqt5
diff --git a/pkgs/applications/misc/electrum/ltc.nix b/pkgs/applications/misc/electrum/ltc.nix
index 45c448804626..a5e4bd74a6eb 100644
--- a/pkgs/applications/misc/electrum/ltc.nix
+++ b/pkgs/applications/misc/electrum/ltc.nix
@@ -4,7 +4,7 @@
 }:
 
 python3Packages.buildPythonApplication rec {
-  name = "electrum-ltc-${version}";
+  pname = "electrum-ltc";
   version = "3.1.3.1";
 
   src = fetchurl {
@@ -12,6 +12,8 @@ python3Packages.buildPythonApplication rec {
     sha256 = "0kxcx1xf6h9z8x0k483d6ykpnmfr30n6z3r6lgqxvbl42pq75li7";
   };
 
+  nativeBuildInputs = with python3Packages; [ pyqt5 ];
+
   propagatedBuildInputs = with python3Packages; [
     pyaes
     ecdsa
diff --git a/pkgs/applications/misc/hamster-time-tracker/default.nix b/pkgs/applications/misc/hamster-time-tracker/default.nix
index 453d95694eb0..9360e220ab6a 100644
--- a/pkgs/applications/misc/hamster-time-tracker/default.nix
+++ b/pkgs/applications/misc/hamster-time-tracker/default.nix
@@ -18,9 +18,9 @@ pythonPackages.buildPythonApplication rec {
     sha256 = "1a85rcg561792kdyv744cgzw7mmpmgv6d6li1sijfdpqa1ninf8g";
   };
 
-  nativeBuildInputs = [ wafHook ];
+  nativeBuildInputs = [ wafHook intltool ];
   buildInputs = [
-    docbook2x libxslt gnome-doc-utils intltool dbus-glib hicolor-icon-theme
+    docbook2x libxslt gnome-doc-utils dbus-glib hicolor-icon-theme
   ];
 
   propagatedBuildInputs = with pythonPackages; [ pygobject2 pygtk pyxdg gnome_python dbus-python ];
diff --git a/pkgs/applications/misc/kitty/default.nix b/pkgs/applications/misc/kitty/default.nix
index 845de8b0388a..58b6ae9aae83 100644
--- a/pkgs/applications/misc/kitty/default.nix
+++ b/pkgs/applications/misc/kitty/default.nix
@@ -7,8 +7,8 @@
 
 with python3Packages;
 buildPythonApplication rec {
+  pname = "kitty";
   version = "0.13.3";
-  name = "kitty-${version}";
   format = "other";
 
   src = fetchFromGitHub {
@@ -24,7 +24,7 @@ buildPythonApplication rec {
     wayland-protocols wayland dbus
   ];
 
-  nativeBuildInputs = [ pkgconfig which sphinx ];
+  nativeBuildInputs = [ pkgconfig which sphinx ncurses ];
 
   outputs = [ "out" "terminfo" ];
 
@@ -36,7 +36,7 @@ buildPythonApplication rec {
   ];
 
   buildPhase = ''
-    python3 setup.py linux-package
+    ${python.interpreter} setup.py linux-package
   '';
 
   installPhase = ''
diff --git a/pkgs/applications/networking/browsers/eolie/default.nix b/pkgs/applications/networking/browsers/eolie/default.nix
index 12a6c64c7ae4..5b3e8d727d0c 100644
--- a/pkgs/applications/networking/browsers/eolie/default.nix
+++ b/pkgs/applications/networking/browsers/eolie/default.nix
@@ -28,6 +28,7 @@ python3.pkgs.buildPythonApplication rec {
 
   buildInputs = with gst_all_1; [
     glib-networking
+    gobject-introspection
     gst-libav
     gst-plugins-base
     gst-plugins-ugly
diff --git a/pkgs/applications/networking/mailreaders/mailnag/default.nix b/pkgs/applications/networking/mailreaders/mailnag/default.nix
index 56a676178cca..6c39dc78e57a 100644
--- a/pkgs/applications/networking/mailreaders/mailnag/default.nix
+++ b/pkgs/applications/networking/mailreaders/mailnag/default.nix
@@ -18,13 +18,14 @@ in pythonPackages.buildPythonApplication rec {
   };
 
   buildInputs = [
-    gettext gtk3 gdk_pixbuf libnotify gst_all_1.gstreamer
+    gtk3 gdk_pixbuf libnotify gst_all_1.gstreamer
     gst_all_1.gst-plugins-base gst_all_1.gst-plugins-good
     gst_all_1.gst-plugins-bad
     gnome3.adwaita-icon-theme
   ] ++ stdenv.lib.optional withGnomeKeyring libgnome-keyring3;
 
   nativeBuildInputs = [
+    gettext
     wrapGAppsHook
   ];
 
diff --git a/pkgs/applications/office/paperwork/default.nix b/pkgs/applications/office/paperwork/default.nix
index 8d76f160d7b2..401d3be3128b 100644
--- a/pkgs/applications/office/paperwork/default.nix
+++ b/pkgs/applications/office/paperwork/default.nix
@@ -6,7 +6,7 @@
 
 python3Packages.buildPythonApplication rec {
   inherit (python3Packages.paperwork-backend) version src;
-  name = "paperwork-${version}";
+  pname = "paperwork";
 
   sourceRoot = "source/paperwork-gtk";
 
@@ -46,7 +46,7 @@ python3Packages.buildPythonApplication rec {
     paths = lib.collect lib.isDerivation aspellDicts;
   }}/lib/aspell";
 
-  checkInputs = [ xvfb_run dbus.daemon ];
+  checkInputs = [ xvfb_run dbus.daemon ] ++ (with python3Packages; [ paperwork-backend ]);
   buildInputs = [
     gnome3.adwaita-icon-theme hicolor-icon-theme libnotify librsvg
   ];
diff --git a/pkgs/applications/version-management/git-and-tools/git-big-picture/default.nix b/pkgs/applications/version-management/git-and-tools/git-big-picture/default.nix
index 7a47ed9a992d..2d171df8bf24 100644
--- a/pkgs/applications/version-management/git-and-tools/git-big-picture/default.nix
+++ b/pkgs/applications/version-management/git-and-tools/git-big-picture/default.nix
@@ -15,6 +15,8 @@ python2Packages.buildPythonApplication rec {
 
   buildInputs = [ git graphviz ];
 
+  checkInputs = [ git ];
+
   postFixup = ''
     wrapProgram $out/bin/git-big-picture \
       --prefix PATH ":" ${ stdenv.lib.makeBinPath buildInputs  }
diff --git a/pkgs/desktops/gnome-3/apps/gnome-music/default.nix b/pkgs/desktops/gnome-3/apps/gnome-music/default.nix
index ea12dff14fc2..98d3cfb55398 100644
--- a/pkgs/desktops/gnome-3/apps/gnome-music/default.nix
+++ b/pkgs/desktops/gnome-3/apps/gnome-music/default.nix
@@ -17,7 +17,7 @@ python3.pkgs.buildPythonApplication rec {
 
   nativeBuildInputs = [ meson ninja gettext itstool pkgconfig libxml2 wrapGAppsHook desktop-file-utils appstream-glib gobject-introspection ];
   buildInputs = with gst_all_1; [
-    gtk3 glib libmediaart gnome-online-accounts
+    gtk3 glib libmediaart gnome-online-accounts gobject-introspection
     gdk_pixbuf gnome3.adwaita-icon-theme python3
     grilo grilo-plugins libnotify libdazzle libsoup
     gnome3.gsettings-desktop-schemas tracker
diff --git a/pkgs/development/python-modules/editorconfig/default.nix b/pkgs/development/python-modules/editorconfig/default.nix
index 97e486a0532b..3f276374d9ea 100644
--- a/pkgs/development/python-modules/editorconfig/default.nix
+++ b/pkgs/development/python-modules/editorconfig/default.nix
@@ -15,7 +15,7 @@ buildPythonPackage rec {
     sha256 = "0svk7id7ncygj2rnxhm7602xizljyidk4xgrl6i0xgq3829cz4bl";
   };
 
-  buildInputs = [ cmake ];
+  nativeBuildInputs = [ cmake ];
   checkPhase = ''
     cmake .
     # utf_8_char fails with python3
diff --git a/pkgs/development/python-modules/gssapi/default.nix b/pkgs/development/python-modules/gssapi/default.nix
index 698da6dc91a1..14d27e7442e2 100644
--- a/pkgs/development/python-modules/gssapi/default.nix
+++ b/pkgs/development/python-modules/gssapi/default.nix
@@ -1,5 +1,5 @@
-{ stdenv, pkgs, lib, buildPythonPackage, fetchPypi, six, enum34, decorator,
-nose, shouldbe, gss, krb5Full, which, darwin }:
+{ stdenv, lib, buildPythonPackage, fetchPypi, six, enum34, decorator,
+nose, gss, krb5Full, darwin }:
 
 buildPythonPackage rec {
   pname = "gssapi";
@@ -16,13 +16,15 @@ buildPythonPackage rec {
       --replace "get_output('krb5-config gssapi --prefix')" "'${lib.getDev krb5Full}'"
   '';
 
-  LD_LIBRARY_PATH = "${pkgs.krb5Full}/lib";
+  LD_LIBRARY_PATH = "${krb5Full}/lib";
 
-  buildInputs = [ krb5Full which nose shouldbe ]
+  nativeBuildInputs = [ krb5Full ]
   ++ ( if stdenv.isDarwin then [ darwin.apple_sdk.frameworks.GSS ] else [ gss ] );
 
   propagatedBuildInputs =  [ decorator enum34 six ];
 
+  checkInputs = [ nose ];
+
   doCheck = false; # No such file or directory: '/usr/sbin/kadmin.local'
 
   meta = with stdenv.lib; {
diff --git a/pkgs/development/python-modules/gst-python/default.nix b/pkgs/development/python-modules/gst-python/default.nix
index 2b9703452dc7..a26b02ee0300 100644
--- a/pkgs/development/python-modules/gst-python/default.nix
+++ b/pkgs/development/python-modules/gst-python/default.nix
@@ -46,7 +46,7 @@ in buildPythonPackage rec {
     substituteInPlace meson.build --replace python3 python${if isPy3k then "3" else "2"}
   '';
 
-  nativeBuildInputs = [ meson ninja pkgconfig python gobject-introspection ];
+  nativeBuildInputs = [ meson ninja pkgconfig python gobject-introspection gst-plugins-base ];
 
   mesonFlags = [
     "-Dpython=python${if isPy3k then "3" else "2"}"
diff --git a/pkgs/development/python-modules/iso3166/default.nix b/pkgs/development/python-modules/iso3166/default.nix
index 21d098eb31b4..c65c5f21e567 100644
--- a/pkgs/development/python-modules/iso3166/default.nix
+++ b/pkgs/development/python-modules/iso3166/default.nix
@@ -12,7 +12,7 @@ buildPythonPackage rec {
     sha256 = "0zs9za9dr2nl5srxir08yibmp6nffcapmzala0fgh8ny7y6rafrx";
   };
 
-  buildInputs = [ pytest ];
+  checkInputs = [ pytest ];
 
   checkPhase = ''
     py.test
diff --git a/pkgs/development/python-modules/libnacl/default.nix b/pkgs/development/python-modules/libnacl/default.nix
index c575e5594be3..54b98cf21368 100644
--- a/pkgs/development/python-modules/libnacl/default.nix
+++ b/pkgs/development/python-modules/libnacl/default.nix
@@ -11,7 +11,7 @@ buildPythonPackage rec {
     sha256 = "05iamhbsqm8binqhc2zchfqdkajlx2icf8xl5vkd5fbrhw6yylad";
   };
 
-  buildInputs = [ pytest ];
+  checkInputs = [ pytest ];
   propagatedBuildInputs = [ libsodium ];
 
   postPatch =
diff --git a/pkgs/development/python-modules/libsexy/default.nix b/pkgs/development/python-modules/libsexy/default.nix
index e5a03f783551..03797575a83e 100644
--- a/pkgs/development/python-modules/libsexy/default.nix
+++ b/pkgs/development/python-modules/libsexy/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, buildPythonPackage, libsexy, pkgconfig, libxml2, pygtk, pango, gtk2, glib }:
+{ stdenv, fetchurl, buildPythonPackage, libsexy, pkgconfig, libxml2, pygtk, pango, gtk2, glib, python }:
 
 buildPythonPackage rec {
   pname = "libsexy";
@@ -10,14 +10,14 @@ buildPythonPackage rec {
     sha256 = "05bgcsxwkp63rlr8wg6znd46cfbhrzc5wh70jabsi654pxxjb39d";
   };
 
-  nativeBuildInputs = [ pkgconfig ];
+  nativeBuildInputs = [ pkgconfig pygtk ];
 
   propagatedBuildInputs = [
-    pygtk libsexy gtk2 glib pango libxml2
+    pygtk libsexy glib pango libxml2
   ];
 
   postInstall = ''
-    ln -s $out/lib/python*/site-packages/gtk-2.0/* $out/lib/python*/site-packages/
+    ln -s $out/${python.sitePackages}/gtk-2.0/* $out/${python.sitePackages}
   '';
 
   meta = {
diff --git a/pkgs/development/python-modules/mpi4py/default.nix b/pkgs/development/python-modules/mpi4py/default.nix
index 6d3897475ad4..09b05f4ab0fc 100644
--- a/pkgs/development/python-modules/mpi4py/default.nix
+++ b/pkgs/development/python-modules/mpi4py/default.nix
@@ -48,7 +48,7 @@ buildPythonPackage rec {
 
   setupPyBuildFlags = ["--mpicc=${mpi}/bin/mpicc"];
 
-  buildInputs = [ mpi openssh ];
+  nativeBuildInputs = [ mpi openssh ];
 
   meta = {
     description =
diff --git a/pkgs/development/python-modules/mysql_python/default.nix b/pkgs/development/python-modules/mysql_python/default.nix
index a38f7e02e1cd..0ab11521cc88 100644
--- a/pkgs/development/python-modules/mysql_python/default.nix
+++ b/pkgs/development/python-modules/mysql_python/default.nix
@@ -17,8 +17,9 @@ buildPythonPackage rec {
     sha256 = "0x0c2jg0bb3pp84njaqiic050qkyd7ymwhfvhipnimg58yv40441";
   };
 
-  buildInputs = [ nose ];
-  propagatedBuildInputs = [ pkgs.mysql.connector-c ];
+  checkInputs = [ nose ];
+  nativeBuildInputs = [ pkgs.mysql.connector-c ];
+  buildInputs = [ pkgs.mysql.connector-c ];
 
   # plenty of failing tests
   doCheck = false;
diff --git a/pkgs/development/python-modules/pgspecial/default.nix b/pkgs/development/python-modules/pgspecial/default.nix
index b2ce1fb8f98b..8c653ce060aa 100644
--- a/pkgs/development/python-modules/pgspecial/default.nix
+++ b/pkgs/development/python-modules/pgspecial/default.nix
@@ -9,7 +9,7 @@ buildPythonPackage rec {
     sha256 = "0yvlxv9vy0hbfgf0xcwl7wh5hg6cl86arsv1ip3kvn9znn6x8kgl";
   };
 
-  buildInputs = [ pytest psycopg2 ];
+  checkInputs = [ pytest psycopg2 ];
   propagatedBuildInputs = [ click sqlparse ];
 
   checkPhase = ''
diff --git a/pkgs/development/python-modules/psycopg2/default.nix b/pkgs/development/python-modules/psycopg2/default.nix
index 081ea4c699d5..dae97d87ef2a 100644
--- a/pkgs/development/python-modules/psycopg2/default.nix
+++ b/pkgs/development/python-modules/psycopg2/default.nix
@@ -12,7 +12,7 @@ buildPythonPackage rec {
   };
 
   buildInputs = lib.optional stdenv.isDarwin openssl;
-  propagatedBuildInputs = [ postgresql ];
+  nativeBuildInputs = [ postgresql ];
 
   doCheck = false;
 
diff --git a/pkgs/development/python-modules/pycurl/default.nix b/pkgs/development/python-modules/pycurl/default.nix
index c437df9cd99c..9fb27c88c029 100644
--- a/pkgs/development/python-modules/pycurl/default.nix
+++ b/pkgs/development/python-modules/pycurl/default.nix
@@ -20,6 +20,7 @@ buildPythonPackage rec {
   };
 
   buildInputs = [ curl openssl.out ];
+  nativeBuildInputs = [ curl ];
 
   checkInputs = [ bottle pytest nose flaky ];
 
diff --git a/pkgs/development/python-modules/pyside/default.nix b/pkgs/development/python-modules/pyside/default.nix
index ab46c726f6c7..e6ac4281362a 100644
--- a/pkgs/development/python-modules/pyside/default.nix
+++ b/pkgs/development/python-modules/pyside/default.nix
@@ -13,7 +13,7 @@ buildPythonPackage rec {
 
   enableParallelBuilding = true;
 
-  buildInputs = [ cmake pysideGeneratorrunner pysideShiboken qt4 ];
+  nativeBuildInputs = [ cmake pysideGeneratorrunner pysideShiboken qt4 ];
 
   makeFlags = "QT_PLUGIN_PATH=" + pysideShiboken + "/lib/generatorrunner";
 
@@ -22,6 +22,6 @@ buildPythonPackage rec {
     license = lib.licenses.lgpl21;
     homepage = http://www.pyside.org;
     maintainers = [ lib.maintainers.chaoflow ];
-    platforms = lib.platforms.all;
+    broken = true;
   };
 }
diff --git a/pkgs/development/python-modules/pyside/shiboken.nix b/pkgs/development/python-modules/pyside/shiboken.nix
index 859e91c872ec..2bf1c4468dd3 100644
--- a/pkgs/development/python-modules/pyside/shiboken.nix
+++ b/pkgs/development/python-modules/pyside/shiboken.nix
@@ -16,7 +16,7 @@ buildPythonPackage rec {
 
   enableParallelBuilding = true;
 
-  buildInputs = [ cmake libxml2 libxslt pysideApiextractor pysideGeneratorrunner python sphinx qt4 ];
+  nativeBuildInputs = [ cmake libxml2 libxslt pysideApiextractor pysideGeneratorrunner python sphinx qt4 ];
 
   preConfigure = ''
     echo "preConfigure: Fixing shiboken_generator install target."
diff --git a/pkgs/development/python-modules/pytest-fixture-config/default.nix b/pkgs/development/python-modules/pytest-fixture-config/default.nix
index af599c86a444..e9ae311d496c 100644
--- a/pkgs/development/python-modules/pytest-fixture-config/default.nix
+++ b/pkgs/development/python-modules/pytest-fixture-config/default.nix
@@ -1,5 +1,5 @@
 { stdenv, buildPythonPackage, fetchPypi
-, setuptools-git, pytest }:
+, setuptools-git, pytest_3 }:
 
 buildPythonPackage rec {
   pname = "pytest-fixture-config";
@@ -12,7 +12,7 @@ buildPythonPackage rec {
 
   nativeBuildInputs = [ setuptools-git ];
 
-  buildInputs = [ pytest ];
+  buildInputs = [ pytest_3 ];
 
   doCheck = false;
 
diff --git a/pkgs/development/python-modules/pytest-flakes/default.nix b/pkgs/development/python-modules/pytest-flakes/default.nix
index 52cfed14150a..df7981e6bfc0 100644
--- a/pkgs/development/python-modules/pytest-flakes/default.nix
+++ b/pkgs/development/python-modules/pytest-flakes/default.nix
@@ -10,7 +10,8 @@ buildPythonPackage rec {
     sha256 = "341964bf5760ebbdde9619f68a17d5632c674c3f6903ef66daa0a4f540b3d143";
   };
 
-  buildInputs = [ pytestpep8 pytest ];
+  checkInputs = [ pytestpep8 pytest ];
+  nativeBuildInputs = [ pytest ];
   propagatedBuildInputs = [ pyflakes ];
 
   # disable one test case that looks broken
diff --git a/pkgs/development/python-modules/pytest-shutil/default.nix b/pkgs/development/python-modules/pytest-shutil/default.nix
index c8a23e6f4496..fedf5010b2bd 100644
--- a/pkgs/development/python-modules/pytest-shutil/default.nix
+++ b/pkgs/development/python-modules/pytest-shutil/default.nix
@@ -1,5 +1,5 @@
 { stdenv, buildPythonPackage, fetchPypi
-, pytest, cmdline, pytestcov, coverage, setuptools-git, mock, pathpy, execnet
+, pytest_3, cmdline, pytestcov, coverage, setuptools-git, mock, pathpy, execnet
 , contextlib2, termcolor }:
 
 buildPythonPackage rec {
@@ -11,8 +11,9 @@ buildPythonPackage rec {
     sha256 = "efe615b7709637ec8828abebee7fc2ad033ae0f1fc54145f769a8b5e8cc3b4ca";
   };
 
-  buildInputs = [ cmdline pytest ];
+  checkInputs = [ cmdline pytest_3 ];
   propagatedBuildInputs = [ pytestcov coverage setuptools-git mock pathpy execnet contextlib2 termcolor ];
+  nativeBuildInputs = [ pytest_3 ];
 
   checkPhase = ''
     py.test
diff --git a/pkgs/development/python-modules/pytest-virtualenv/default.nix b/pkgs/development/python-modules/pytest-virtualenv/default.nix
index a3ecd4d62ae6..ec6441870563 100644
--- a/pkgs/development/python-modules/pytest-virtualenv/default.nix
+++ b/pkgs/development/python-modules/pytest-virtualenv/default.nix
@@ -1,5 +1,5 @@
 { stdenv, buildPythonPackage, fetchPypi
-, pytest, pytestcov, mock, cmdline, pytest-fixture-config, pytest-shutil }:
+, pytest_3, pytestcov, mock, cmdline, pytest-fixture-config, pytest-shutil }:
 
 buildPythonPackage rec {
   pname = "pytest-virtualenv";
@@ -10,10 +10,12 @@ buildPythonPackage rec {
     sha256 = "d281725d10848773cb2b495d1255dd0a42fc9179e34a274c22e1c35837721f19";
   };
 
-  buildInputs = [ pytest pytestcov mock cmdline ];
+  checkInputs = [ pytest_3 pytestcov mock cmdline ];
   propagatedBuildInputs = [ pytest-fixture-config pytest-shutil ];
   checkPhase = '' py.test tests/unit '';
 
+  nativeBuildInputs = [ pytest_3 ];
+
   meta = with stdenv.lib; {
     description = "Create a Python virtual environment in your test that cleans up on teardown. The fixture has utility methods to install packages and list what’s installed.";
     homepage = https://github.com/manahl/pytest-plugins;
diff --git a/pkgs/servers/matrix-synapse/default.nix b/pkgs/servers/matrix-synapse/default.nix
index e2ee3e55afb7..f88211cda091 100644
--- a/pkgs/servers/matrix-synapse/default.nix
+++ b/pkgs/servers/matrix-synapse/default.nix
@@ -70,7 +70,7 @@ in buildPythonApplication rec {
   checkInputs = [ mock ];
 
   checkPhase = ''
-    PYTHONPATH=".:$PYTHONPATH" trial tests
+    PYTHONPATH=".:$PYTHONPATH" ${python3.interpreter} -m twisted.trial tests
   '';
 
   meta = with stdenv.lib; {
diff --git a/pkgs/tools/backup/ddar/default.nix b/pkgs/tools/backup/ddar/default.nix
index 3855152880e2..de501659b083 100644
--- a/pkgs/tools/backup/ddar/default.nix
+++ b/pkgs/tools/backup/ddar/default.nix
@@ -23,6 +23,7 @@ python2.pkgs.buildPythonApplication rec {
     make -f Makefile.prep synctus/ddar_pb2.py
   '';
 
+  nativeBuildInputs = with python2.pkgs; [ protobuf.protobuf ];
   propagatedBuildInputs = with python2.pkgs; [ protobuf ];
 
   checkInputs = [ roundup ];
diff --git a/pkgs/tools/networking/linkchecker/default.nix b/pkgs/tools/networking/linkchecker/default.nix
index 6e41de8999b9..6e13d7fb94cb 100644
--- a/pkgs/tools/networking/linkchecker/default.nix
+++ b/pkgs/tools/networking/linkchecker/default.nix
@@ -18,6 +18,7 @@ python2Packages.buildPythonApplication rec {
   pname = "LinkChecker";
   version = "9.3.1";
 
+  nativeBuildInputs = [ gettext ];
   propagatedBuildInputs = (with python2Packages; [ 
     requests
   ]) ++ [ gettext ];
diff --git a/pkgs/tools/security/onioncircuits/default.nix b/pkgs/tools/security/onioncircuits/default.nix
index 88076abc4f6b..898bfb599a31 100644
--- a/pkgs/tools/security/onioncircuits/default.nix
+++ b/pkgs/tools/security/onioncircuits/default.nix
@@ -10,6 +10,7 @@ pythonPackages.buildPythonApplication rec {
     sha256 = "13mqif9b9iajpkrl9ijspdnvy82kxhprxd5mw3njk68rcn4z2pcm";
   };
 
+  nativeBuildInputs = [ intltool ];
   buildInputs = [ intltool gtk3 gobject-introspection ];
   propagatedBuildInputs =  with pythonPackages; [ stem distutils_extra pygobject3 ];