anchor.diff:  
   stdenv.mkDerivation rec {
     pname = "gegl";
  -  version = "0.4.20";
  +  version = "0.4.22";
   
     outputs = [ "out" "dev" "devdoc" ];
     outputBin = "dev";
   
     src = fetchurl {
       url = "https://download.gimp.org/pub/gegl/${stdenv.lib.versions.majorMinor version}/${pname}-${version}.tar.xz";
  -    sha256 = "1zrxnxlhn0jmshg4n2m2xlgi886w059ynkiiihm7rpi05fs8pg93";
  +    sha256 = "0q9cckf90fb82qc5d496fjz459f1xw4j4p3rff1f57yivx0yr20q";
     };
   
     patches = [
  
positive.code:     netsurf.libnsgif
      pango
      poly2tri-c
      bzip2
      libraw
      libwebp
  
negative.code: , netsurf
  , pango
  , poly2tri-c
  , poppler
  , bzip2
  , json-glib
  , gettext
  