anchor.diff:  , babl
   , cairo
   , exiv2
  -, ffmpeg_3-4
  +, ffmpeg
   , gdk-pixbuf
   , gexiv2
   , glib
  
positive.code:     babl
      cairo
      exiv2
      ffmpeg_3-4
      gdk-pixbuf
      gexiv2
      glib
  
negative.code:     platforms;
  
    channel = "0.4";
    version = "${channel}.6";
  in
  stdenv.mkDerivation rec {
    name = "gegl-${version}";
  
    src = fetchurl {
      url = "https://download.gimp.org/pub/gegl/${channel}/${name}.tar.bz2";
      multihash = "QmPSjiRoCAUwrf42mUrjKDEXuy15a39xjy4z3zgbJA418e";
      hashOutput = false;
      sha256 = "f8cb45da736131fe29582b74cf6851102ae013bf99c77413a8bcb02e92e57890";
    };
  
    nativeBuildInputs = [
  