anchor.diff:    libintl_perl = buildPerlPackage rec {
       name = "libintl-perl-1.23";
       src = fetchurl {
  -        url = http://cpan.metacpan.org/authors/id/G/GU/GUIDO/libintl-perl-1.23.tar.gz;
  -        sha256 = "1ylz6yhjifblhmnva0k05ch12a4cdii5v0icah69ma1gdhsidnk0";
  +      url = mirror://cpan/authors/id/G/GU/GUIDO/libintl-perl-1.23.tar.gz;
  +      sha256 = "1ylz6yhjifblhmnva0k05ch12a4cdii5v0icah69ma1gdhsidnk0";
       };
     };
   
  
positive.code:   MooseXTypesLoadableClass = buildPerlPackage rec {
      name = "MooseX-Types-LoadableClass-0.008";
      src = fetchurl {
        url = http://cpan.metacpan.org/authors/id/B/BO/BOBTFISH/MooseX-Types-LoadableClass-0.008.tar.gz;
        sha256 = "0wh4zxknqv98nrmsp6yg6mazjyl3vacrgywarzjg5gks78c84i8g";
      };
      propagatedBuildInputs = [ ClassLoad Moose MooseXTypes namespaceclean ];
  
negative.code:   BitVector = buildPerlPackage {
      name = "Bit-Vector-7.3";
      src = fetchurl {
        url = mirror://cpan/authors/id/S/ST/STBEY/Bit-Vector-7.3.tar.gz;
        sha256 = "0gcg1173i1bsx2qvyw77kw90xbf03b861jc42hvq744vzc5k6xjs";
      };
      propagatedBuildInputs = [CarpClan];
  