anchor.diff:      "--disable-workshop"
       "--${boolEn (vala != null)}-vala"
       "--without-mrg"
  -    # Requres --with-mrg
  -    #"--${boolWt (gexiv2 != null && mrg != null)}-gexiv2"
  -    "--without-gexiv2"
  +    "--${boolWt (gexiv2 != null)}-gexiv2"
       "--${boolWt (cairo != null)}-cairo"
       "--${boolWt (pango != null)}-pango"
       "--${boolWt (pango != null)}-pangocairo"
  
positive.code:   buildInputs = [
      babl
      cairo
      #exiv2
      ffmpeg
      gdk-pixbuf_unwrapped
      #gexiv2
      glib
      gobject-introspection
      jasper
  
negative.code:     platforms;
  
    channel = "0.3";
    version = "${channel}.18";
  in
  stdenv.mkDerivation rec {
    name = "gegl-${version}";
  
    src = fetchurl {
      url = "https://download.gimp.org/pub/gegl/${channel}/${name}.tar.bz2";
      multihash = "QmeC7yPAgNirKJF3iUqnn9ApBm3tLkJ9zcNzpimtytyMKz";
      hashOutput = false;
      sha256 = "d7858ef26ede136d14e3de188a9e9c0de7707061a9fb96d7d615fab4958491fb";
    };
  
    nativeBuildInputs = [
  