diff --git a/pkgs/tools/X11/xpra/default.nix b/pkgs/tools/X11/xpra/default.nix
index 9fc34a2cf3fd..a6d0065e8cc1 100644
--- a/pkgs/tools/X11/xpra/default.nix
+++ b/pkgs/tools/X11/xpra/default.nix
@@ -1,6 +1,8 @@
-{stdenv, fetchurl, pkgconfig, python, cython, pygtk, xlibs, gtk, ffmpeg, x264, libvpx, makeWrapper}:
+{ stdenv, fetchurl, pkgconfig, python, cython
+, pygtk, pygobject, pycairo, xlibs, gtk
+, ffmpeg, x264, libvpx, makeWrapper}:
 
-stdenv.mkDerivation {
+stdenv.mkDerivation rec {
   name = "xpra-0.3.2";
   
   src = fetchurl {
@@ -8,8 +10,10 @@ stdenv.mkDerivation {
     sha256 = "1s1z6r0r78qvf59ci3vxammjz7lj5m64jyk0bfn7yxd5jl3sy41y";
   };
 
+  buildNativeInputs = [ cython ];
+
   buildInputs = [
-    pkgconfig python cython pygtk gtk ffmpeg x264 libvpx makeWrapper
+    pkgconfig python pygtk gtk ffmpeg x264 libvpx makeWrapper
     xlibs.inputproto xlibs.libXcomposite xlibs.libXdamage xlibs.libXtst
   ];
 
@@ -19,13 +23,20 @@ stdenv.mkDerivation {
     ./do-build
   '';
 
+  pythonPaths = [
+    "$out/lib/python"
+    "$(toPythonPath ${pygtk})/gtk-2.0"
+  ] ++ map (i: "$(toPythonPath ${i})") [
+    pygobject pycairo notify
+  ];
+
   installPhase = ''
     mkdir -p $out
     cp -r install/* $out
 
     for i in $(cd $out/bin && ls); do
         wrapProgram $out/bin/$i \
-            --set PYTHONPATH "$out/lib/python:$(toPythonPath ${pygtk})/gtk-2.0:$PYTHONPATH" \
+            --set PYTHONPATH "${stdenv.lib.concatStringsSep ":" pythonPaths}" \
             --prefix PATH : "${xlibs.xauth}/bin:${xlibs.xorgserver}/bin:${xlibs.xmodmap}/bin"
     done
   '';