anchor.diff:  { stdenv
   , fetchurl
  +, makeWrapper
   , perlPackages
  -, makeWrapper
   }:
   
   stdenv.mkDerivation rec {
  
positive.code:   };
  
    nativeBuildInputs = [
      perlPackages.perl
      perlPackages.XMLParser
      makeWrapper
    ];
  
    postPatch = ''
  
negative.code:   preFixup = ''
      for prog in xmltoman xmlmantohtml; do
        wrapProgram "$out/bin/$prog" \
          --set 'PERL5LIB' "${stdenv.lib.makePerlPath [ perlPackages.XMLParser ]}"
      done
    '';
  
    meta = with stdenv.lib; {
      description = "Simple scripts for converting xml to groff or html";
      homepage = http://sourceforge.net/projects/xmltoman/;
      license = licenses.gpl2;
      maintainers = with maintainers; [
        wkennington
      ];
      platforms = [
        "i686-linux"
        "x86_64-linux"
      ];
    };
  }
  