anchor.diff:      propagatedBuildInputs = [ FileFindRule FileFindRulePerl PPI PPIxRegexp ParamsUtil PerlCritic ];
       meta = {
         description = "Find a minimum required version of perl for Perl code";
  -      license = stdenv.lib.licenses.perl5;
  +      license = "perl";
       };
     };
   
  
positive.code:     meta = {
        homepage = https://github.com/pshangov/moosex-has-options;
        description = "Succinct options for Moose";
        license = stdenv.lib.licenses.perl5;
        maintainers = with maintainers; [ ocharles ];
        platforms   = stdenv.lib.platforms.unix;
      };
  
negative.code:     propagatedBuildInputs = [ HTTPMessage ];
      meta = {
        description = "HTTP Body Parser";
        license = "perl";
      };
    };
  
  