anchor.diff:  
   in stdenv.mkDerivation rec {
     name = "cups-filters-${version}";
  -  version = "1.11.1";
  +  version = "1.14.0";
   
     src = fetchurl {
       url = "http://openprinting.org/download/cups-filters/${name}.tar.xz";
  -    sha256 = "0x0jxn1hnif92m7dyqrqh015gpsf79dviarb7dfl0zya2drlk1m8";
  +    sha256 = "1v553wvr8qdwb1g04if7cw1mfm42vs6xfyg0cvzvbng6yr6jg93s";
     };
   
     nativeBuildInputs = [ pkgconfig makeWrapper ];
   
     buildInputs = [
       cups poppler poppler_utils fontconfig libjpeg libpng perl
  -    ijs qpdf dbus avahi
  +    ijs qpdf dbus avahi ghostscript mupdf
     ];
   
     configureFlags = [
  
positive.code: 
        # Ensure that gstoraster can find gs in $PATH.
        substituteInPlace filter/gstoraster.c --replace execve execvpe
      '';
  
    postInstall =
  
negative.code:     description = "Backends, filters, and other software that was once part of the core CUPS distribution but is no longer maintained by Apple Inc";
      license = stdenv.lib.licenses.gpl2;
      platforms = stdenv.lib.platforms.linux;
      maintainers = with stdenv.lib.maintainers; [ layus ];
    };
  }
  