anchor.diff:      src = fetchurl {
         url = "mirror://cpan/authors/id/J/JM/JMCNAMARA/${name}.tar.gz";
         sha256 = "179cxwqxb0f9dpx8954nvwjmggxxi5ndnang41yav1dx6mf0abp7";
  +    };
  +  };
  +
  +  Opcodes = buildPerlPackage {
  +    name = "Opcodes-0.14";
  +    src = fetchurl {
  +      url = mirror://cpan/authors/id/R/RU/RURBAN/Opcodes-0.14.tar.gz;
  +      sha256 = "7f7365447e4d1c5b87b43091448f0488e67c9f036b26c022a5409cd73d343893";
  +    };
  +    meta = {
  +      description = "More Opcodes information from opnames.h and opcode.h";
  +      license = "perl";
       };
     };
   
  
positive.code:     src = fetchurl {
        url = "mirror://cpan/modules/by-module/Math/${name}.tar.gz";
        sha256 = "194dvggf1cmzc701j4wma38jgrcv2pwwzk69rnysjjdcjdv6y255";
      };
    };
  
  
negative.code:     propagatedBuildInputs = [XMLRegExp XMLParser LWP libxml_perl];
    };
  
    XMLFilterBufferText = buildPerlPackage {
      name = "XML-Filter-BufferText-1.01";
      src = fetchurl {
        url = mirror://cpan/authors/id/R/RB/RBERJON/XML-Filter-BufferText-1.01.tar.gz;
        sha256 = "8fd2126d3beec554df852919f4739e689202cbba6a17506e9b66ea165841a75c";
      };
      doCheck = false;
    };
  
    XMLFilterXInclude = buildPerlPackage {
      name = "XML-Filter-XInclude-1.0";
      src = fetchurl {
        url = mirror://cpan/authors/id/M/MS/MSERGEANT/XML-Filter-XInclude-1.0.tar.gz;
        sha256 = "98746f3c1f6f049491fec203d455bb8f8c9c6e250f041904dda5d78e21187f93";
      };
      doCheck = false;
    };
  
    XMLLibXML = buildPerlPackage rec {
      name = "XML-LibXML-2.0121";
      src = fetchurl {
  