anchor.diff:      ./prevent-closure-contamination.patch
     ];
   
  +  nativeBuildInputs = [
  +    meson
  +    ninja
  +    pkg-config
  +    intltool
  +    itstool
  +    python3
  +    wrapGAppsHook
  +  ];
  +
  +  buildInputs = [
  +    gobject-introspection
  +    gtk3
  +    librsvg
  +    gnome3.gnome-desktop
  +    gsound
  +    gnome3.adwaita-icon-theme
  +    gsettings-desktop-schemas
  +    libnotify
  +    gst-transcoder
  +  ] ++ (with gst_all_1; [
  +    gstreamer
  +    gst-editing-services
  +    gst-plugins-base
  +    (gst-plugins-good.override { gtkSupport = true; })
  +    gst-plugins-bad
  +    gst-plugins-ugly
  +    gst-libav
  +    gst-validate
  +  ]);
  +
  +  pythonPath = with python3Packages; [
  +    pygobject3
  +    gst-python
  +    pyxdg
  +    numpy
  +    pycairo
  +    matplotlib
  +    dbus-python
  +  ];
  +
     postPatch = ''
       patchShebangs ./getenvvar.py
     '';
  -
  -  nativeBuildInputs = [ meson ninja pkgconfig intltool itstool python3 wrapGAppsHook ];
  -
  -  buildInputs = [
  -    gobject-introspection gtk3 librsvg gnome3.gnome-desktop gsound
  -    gnome3.adwaita-icon-theme
  -    gsettings-desktop-schemas libnotify
  -    gst-transcoder
  -  ] ++ (with gst_all_1; [
  -    gstreamer gst-editing-services
  -    gst-plugins-base (gst-plugins-good.override { gtkSupport = true; })
  -    gst-plugins-bad gst-plugins-ugly gst-libav gst-validate
  -  ]);
  -
  -  pythonPath = with python3Packages; [ pygobject3 gst-python pyxdg numpy pycairo matplotlib dbus-python ];
   
     passthru = {
       updateScript = gnome3.updateScript {
  
positive.code: { stdenv, fetchFromGitHub, fetchurl, pkgconfig, intltool, itstool, python3, wrapGAppsHook
  , python3Packages, gst_all_1, gtk3
  , gobject-introspection, librsvg, gnome3, libnotify, gsound
  , meson, ninja, gsettings-desktop-schemas
  }:
  
  let
    version = "0.999";
  
    # gst-transcoder will eventually be merged with gstreamer (according to
    # gst-transcoder 1.8.0 release notes). For now the only user is pitivi so we
    # don't bother exposing the package to all of nixpkgs.
  
negative.code:       rev = version;
        sha256 = "16skiz9akavssii529v9nr8zd54w43livc14khdyzv164djg9q8f";
      };
      nativeBuildInputs = [
        pkg-config
        meson
        ninja
        gobject-introspection
        python3
      ];
      buildInputs = with gst_all_1; [
        gstreamer
        gst-plugins-base
      ];
    };
  
  in python3Packages.buildPythonApplication rec {
    pname = "pitivi";
    version = "0.999";
  
    format = "other";
  
    src = fetchurl {
      url = "mirror://gnome/sources/pitivi/${stdenv.lib.versions.majorMinor version}/${pname}-${version}.tar.xz";
      sha256 = "0mxp2p4gg976fp1vj3rb5rmpl5mqfzncm9vw2719irl32f1qlvyb";
    };
  
    patches = [
      # By default, the build picks up environment variables like PYTHONPATH
  