anchor.diff:      };
       meta = {
         description = "Check file names portability";
  +      license = with stdenv.lib.licenses; [ artistic1 gpl1Plus ];
  +    };
  +  };
  +
  +  TestRefcount = buildPerlModule {
  +    pname = "Test-Refcount";
  +    version = "0.10";
  +    src = fetchurl {
  +      url = mirror://cpan/authors/id/P/PE/PEVANS/Test-Refcount-0.10.tar.gz;
  +      sha256 = "1chf6zizi7x128l3qm1bdqzwjjqm2j4gzajgghaksisn945c4mq4";
  +    };
  +    meta = {
  +      description = "assert reference counts on objects";
         license = with stdenv.lib.licenses; [ artistic1 gpl1Plus ];
       };
     };
  
positive.code:      };
    };
  
    TestHTTPServerSimple = buildPerlPackage {
      pname = "Test-HTTP-Server-Simple";
      version = "0.11";
  
negative.code:     };
    };
  
    Future = buildPerlModule {
      pname = "Future";
      version = "0.43";
      src = fetchurl {
        url = mirror://cpan/authors/id/P/PE/PEVANS/Future-0.43.tar.gz;
        sha256 = "191qvn3jz5pk5zxykwsg1i17s45kc82rfd6kgzsv9nki1c04dzaf";
      };
      buildInputs = [ TestFatal TestIdentity TestRefcount ];
      meta = {
        description = "represent an operation awaiting completion";
        license = with stdenv.lib.licenses; [ artistic1 gpl1Plus ];
      };
    };
  
    GamesSolitaireVerify = buildPerlModule {
      pname = "Games-Solitaire-Verify";
      version = "0.2202";
  