anchor.diff:        sha256 = "29a1926314ce1681a312d6155c29590c771ddacf91b7485873ce449ef209dd04";
       };
       meta = {
  -      license = "unknown";
  +      license = with stdenv.lib.licenses; [ artistic1 gpl2Plus ];
       };
     };
   
  
positive.code:     };
      meta = {
        description = "Modules for parsing/translating POD format documents";
        license = "unknown";
      };
    };
  
  
negative.code:     meta = {
        homepage = http://search.cpan.org/dist/Math-Random-ISAAC;
        description = "Perl interface to the ISAAC PRNG algorithm";
        license = with stdenv.lib.licenses; [ publicDomain mit artistic2 gpl3 ];
        maintainers = with maintainers; [ ocharles ];
        platforms   = stdenv.lib.platforms.unix;
      };
  