anchor.diff:      platforms;
   
     channel = "0.4";
  -  version = "${channel}.2";
  +  version = "${channel}.6";
   in
   stdenv.mkDerivation rec {
     name = "gegl-${version}";
   
     src = fetchurl {
       url = "https://download.gimp.org/pub/gegl/${channel}/${name}.tar.bz2";
  -    multihash = "QmTN1J6X7sjQ92JBQZptukofZGu6nZvjNKoqhRqndTudVc";
  +    multihash = "QmPSjiRoCAUwrf42mUrjKDEXuy15a39xjy4z3zgbJA418e";
       hashOutput = false;
  -    sha256 = "6a358bc19d20b8ac1daf645cc8b53cdc2ea6f9c98a6036179a57045a26a07f8d";
  +    sha256 = "f8cb45da736131fe29582b74cf6851102ae013bf99c77413a8bcb02e92e57890";
     };
   
     nativeBuildInputs = [
  
positive.code:     babl
      cairo
      exiv2
      ffmpeg_3-4
      gdk-pixbuf
      gexiv2
      glib
  
negative.code:     "--${boolWt (jasper != null)}-jasper"
      "--without-graphviz"
      "--without-lua"
      "--${boolWt (ffmpeg != null)}-libavformat"
      "--${boolWt (v4l_lib != null)}-libv4l"
      "--${boolWt (lcms2 != null)}-lcms"
      "--${boolWt (libspiro != null)}-libspiro"
  