anchor.diff:    };
   
     perlLWP = import ../development/perl-modules/generic perl {
  -    name = "libwww-perl-5.803";
  +    name = "libwww-perl-5.808";
       src = fetchurl {
  -      url = http://nix.cs.uu.nl/dist/tarballs/libwww-perl-5.803.tar.gz;
  -      md5 = "3345d5f15a4f42350847254141725c8f";
  -    };
  -    propagatedBuildInputs = [perlURI perlHTMLParser];
  +      url = http://search.cpan.org/CPAN/authors/id/G/GA/GAAS/libwww-perl-5.808.tar.gz;
  +      sha256 = "1r5rslx68yplyd07bvjahjjrrqb56bhgg6gwdr9c16mv2s57gq12";
  +    };
  +    propagatedBuildInputs = [perlURI perlHTMLParser perlHTMLTagset];
     };
   
     perlModulePluggable = import ../development/perl-modules/generic perl {
  
positive.code:   perlURI = import ../development/perl-modules/generic perl {
      name = "URI-1.35";
      src = fetchurl {
        url = http://nix.cs.uu.nl/dist/tarballs/URI-1.35.tar.gz;
        md5 = "1a933b1114c41a25587ee59ba8376f7c";
      };
    };
  
    perlXMLLibXML = import ../development/perl-modules/generic perl {
  
negative.code: 
    perlXMLParser = import ../development/perl-modules/XML-Parser {
      inherit fetchurl perl expat;
    };
  
    perlXMLRegExp = import ../development/perl-modules/generic perl {
      name = "XML-RegExp-0.03";
      src = fetchurl {
        url = http://search.cpan.org/CPAN/authors/id/T/TJ/TJMATHER/XML-RegExp-0.03.tar.gz;
        sha256 = "1gkarylvdk3mddmchcwvzq09gpvx5z26nybp38dg7mjixm5bs226";
      };
    };
  
    perlXMLSAX = import ../development/perl-modules/generic perl {
  