anchor.diff:  
     postPatch = ''
       patchShebangs ./getenvvar.py
  +
  +    # fetchpatch does not support renamings
  +    mv data/org.pitivi.Pitivi-mime.xml data/org.pitivi.Pitivi-mime.xml.in
     '';
   
     passthru = {
  
positive.code: }:
  
  let
    # 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.
    gst-transcoder = stdenv.mkDerivation rec {
      version = "1.14.1";
      pname = "gst-transcoder";
  
negative.code: { stdenv
  , fetchFromGitHub
  , fetchurl
  , fetchpatch
  , pkg-config
  , gettext
  , itstool
  , python3
  , wrapGAppsHook
  