anchor.diff:    };
   
     meta = with stdenv.lib; {
  +    description = "PostScript interpreter";
       homepage = "http://www.ghostscript.com/";
  -    description = "PostScript interpreter (mainline version)";
       license = licenses.gpl3Plus;
       maintainers = with maintainers; [
         wkennington
  
positive.code: 
    NIX_ZLIB_INCLUDE = "${zlib}/include";
  
    patches = [
      (fetchTritonPatch {
        rev = "9e45913651939a22fb58254b2482ae4dcb4c8d56";
        file = "g/ghostscript/CVE-2016-8602.patch";
        sha256 = "d48abd753695111b8b19b34c7590c8ed27b2c678575ac34f55e406b05bac0023";
      })
      (fetchTritonPatch {
        rev = "16e1e82d413e33a3a46976f64c275c58a7dc3928";
        file = "ghostscript/urw-font-files.patch";
  
negative.code:   ];
  
    postPatch = ''
      rm -rv freetype jbig2dec jpeg lcms2 libpng tiff zlib ijs
  
      sed -i base/unix-aux.mak \
        -e "s@if ( test -f \$(INCLUDE)[^ ]* )@if ( true )@; s@INCLUDE=/usr/include@INCLUDE=/no-such-path@"
      sed "s@^ZLIBDIR=.*@ZLIBDIR=${zlib}/include@" -i configure.ac
    '';
  
  