anchor.diff:    perlMIMETypes = import ../development/perl-modules/generic perl {
       name = "MIME-Types-1.24";
       src = fetchurl {
  -      url = http://search.cpan.org/CPAN/authors/id/M/MA/MARKOV/MIME-Types-1.24.tar.gz;
  +      url = mirror://cpan/authors/id/M/MA/MARKOV/MIME-Types-1.24.tar.gz;
         sha256 = "1j89kjv9lipv6r3bq6dp0k9b8y1f8z9vrmhi7b8h7cs1yc8g7qz9";
       };
       propagatedBuildInputs = [perlTestPod];
  
positive.code:   perlTreeDAGNode = import ../development/perl-modules/generic perl {
      name = "Tree-DAG_Node-1.06";
      src = fetchurl {
        url = http://search.cpan.org/CPAN/authors/id/C/CO/COGENT/Tree-DAG_Node-1.06.tar.gz;
        sha256 = "0anvwfh4vqj41ipq52p65sqlvw3rvm6cla5hbws13gyk9mvp09ah";
      };
    };
  
negative.code:   perlBitVector = import ../development/perl-modules/generic perl {
      name = "Bit-Vector-6.4";
      src = fetchurl {
        url = mirror://cpan/authors/id/S/ST/STBEY/Bit-Vector-6.4.tar.gz;
        sha256 = "146vr78r6w3cxrm0ji491ylaa1abqh7fs81qhg15g3gzzxfg33bp";
      };
      propagatedBuildInputs = [perlCarpClan];
  