anchor.diff:      meta = {
         homepage = https://metacpan.org/release/Exporter-Tiny;
         description = "An exporter with the features of Sub::Exporter but only core dependencies";
  -      license = "perl";
  +      license = with stdenv.lib.licenses; [ artistic1 gpl1Plus ];
       };
     };
   
  
positive.code:     doCheck = false;
      meta = {
        description = "Perl core IO modules";
        license = "perl";
      };
    };
  
  
negative.code:     };
      meta = {
        description = "Convert POD data to various other formats";
        license = with stdenv.lib.licenses; [ artistic1 gpl1Plus ];
      };
    };
  
  