anchor.diff:      propagatedBuildInputs = [ Error ];
       meta = {
         description = "This is the Git.pm, plus the other files in the perl/Git directory, from github's git/git";
  -      license = with lib.licenses; [ free ];
  +      license = with lib.licenses; [ gpl2Plus ];
         maintainers = teams.deshaw.members;
       };
     };
  
positive.code:     propagatedBuildInputs = [ NumberFormat ];
      meta = {
        description = "A collection of very basic statistics modules";
        license = with lib.licenses; [ free ];
      };
    };
  
  
negative.code:     meta = {
        description = "Module to align text";
        homepage = "https://metacpan.org/release/Text-Aligner";
        license = with lib.licenses; [ isc ];
      };
    };
  
  