diff --git a/pkgs/applications/video/pitivi/default.nix b/pkgs/applications/video/pitivi/default.nix
index c2c64bfa496..2317765118f 100644
--- a/pkgs/applications/video/pitivi/default.nix
+++ b/pkgs/applications/video/pitivi/default.nix
@@ -46,6 +46,8 @@ in stdenv.mkDerivation rec {
     dbus-python
   ]);
 
+  PYTHONPATH = "${python3Packages.gst-python}/lib/${python3Packages.python.sitePackages}";
+
   meta = with stdenv.lib; {
     description = "Non-Linear video editor utilizing the power of GStreamer";
     homepage    = "http://pitivi.org/";