anchor.diff:      version = "1.4";
       src = fetchurl {
         url = "mirror://cpan/authors/id/L/LK/LKUNDRAK/RPM2-1.4.tar.gz";
  -      sha256 = "5ecb42aa69324e6f4088abfae07313906e5aabf2f46f1204f3f1de59155bb636";
  +      hash = "sha256-XstCqmkyTm9AiKv64HMTkG5aq/L0bxIE8/HeWRVbtjY=";
       };
       buildInputs = [ pkgs.pkg-config pkgs.rpm ];
       doCheck = false; # Tries to open /var/lib/rpm
  
positive.code:     version = "0.049";
      src = fetchurl {
        url = "mirror://cpan/authors/id/X/XA/XAOC/Glib-Object-Introspection-0.049.tar.gz";
        sha256 = "0mxg6pz8qfyipw0ypr54alij0c4adzg94f62702b2a6hkp5jhij6";
      };
      checkInputs = [ pkgs.cairo CairoGObject ];
      propagatedBuildInputs = [ pkgs.gobject-introspection Glib ];
  
negative.code:     version = "0.13";
      src = fetchurl {
        url = "mirror://cpan/authors/id/B/BA/BAREFOOT/Data-Random-0.13.tar.gz";
        hash = "sha256-61kBhKjbKKfknqsJ4l+GUMM/H2aLakcoKd50pTJWv8A=";
      };
      buildInputs = [ FileShareDirInstall TestMockTime ];
      meta = {
  