anchor.diff:      src = fetchurl {
         url = "mirror://cpan/authors/id/S/SM/SMUELLER/${name}.tar.gz";
         sha256 = "07ipa2ssflw3ais8gbjdk4l8z2k1p65nfjwkxm37g6zw1210pdih";
  +    };
  +  };
  +
  +  ExtUtilsPkgConfig = buildPerlPackage rec {
  +    name = "ExtUtils-PkgConfig-1.15";
  +    src = fetchurl {
  +      url = "mirror://cpan/authors/id/X/XA/XAOC/${name}.tar.gz";
  +      sha256 = "1cxh6w8vmyqmhl6afys2q6z6jkp1m6zvacpk70196zmk48p1kcv9";
  +    };
  +    propagatedBuildInputs = [ pkgs.pkgconfig ];
  +    meta = {
  +      description = "Simplistic interface to pkg-config";
  +      license = licenses.lgpl21Plus;
       };
     };
   
  
positive.code:     propagatedBuildInputs = [XMLParser];
    };
  
    XMLTwig = buildPerlPackage {
      name = "XML-Twig-3.44";
      src = fetchurl {
  
negative.code:     src = fetchurl {
        url = "mirror://cpan/authors/id/J/JO/JOSEPHW/${name}.tar.gz";
        sha256 = "0yyz0dh9b4clailbxyi90dfrqpyc6py77rmmz6qmkx7ynlpyxk46";
      };
    };
  
    XSObjectMagic = buildPerlPackage rec {
      name = "XS-Object-Magic-0.04";
      src = fetchurl {
        url = "mirror://cpan/authors/id/F/FL/FLORA/${name}.tar.gz";
        sha256 = "03fghj7hq0fiicmfdxhmzfm4mzv7s097pgkd32ji7jnljvhm9six";
      };
      buildInputs = [ ExtUtilsDepends TestFatal Testuseok ];
      meta = {
        description = "XS pointer backed objects using sv_magic";
        license = "perl";
      };
    };
  
  