anchor.diff:  
   stdenv.mkDerivation rec {
     pname = "gdk-pixbuf";
  -  version = "2.42.2";
  +  version = "2.42.6";
   
     outputs = [ "out" "dev" "man" "devdoc" "installedTests" ];
   
     src = fetchurl {
       url = "mirror://gnome/sources/${pname}/${lib.versions.majorMinor version}/${pname}-${version}.tar.xz";
  -    sha256 = "05ggmzwvrxq9w4zcvmrnnd6qplsmb4n95lj4q607c7arzlf6mil3";
  +    sha256 = "0zz7pmw2z46g7mr1yjxbsdldd5pd03xbjc58inj8rxfqgrdvg9n4";
     };
   
     patches = [
  
positive.code:     substituteInPlace tests/meson.build --subst-var-by installedtestsprefix "$installedTests"
    '';
  
    postInstall =
      # meson erroneously installs loaders with .dylib extension on Darwin.
      # Their @rpath has to be replaced before gdk-pixbuf-query-loaders looks at them.
      lib.optionalString stdenv.isDarwin ''
        for f in $out/${passthru.moduleDir}/*.dylib; do
            install_name_tool -change @rpath/libgdk_pixbuf-2.0.0.dylib $out/lib/libgdk_pixbuf-2.0.0.dylib $f
            mv $f ''${f%.dylib}.so
        done
      ''
      # All except one utility seem to be only useful during building.
      + ''
        moveToOutput "bin" "$dev"
        moveToOutput "bin/gdk-pixbuf-thumbnailer" "$out"
      '' + lib.optionalString (stdenv.hostPlatform == stdenv.buildPlatform) ''
        # We need to install 'loaders.cache' in lib/gdk-pixbuf-2.0/2.10.0/
        $dev/bin/gdk-pixbuf-query-loaders --update-cache
  
negative.code: , pkg-config
  , gettext
  , python3
  , libxslt
  , docbook-xsl-nons
  , docbook_xml_dtd_43
  , gi-docgen
  , glib
  , libtiff
  , libjpeg
  