anchor.diff:      propagatedBuildInputs = [ HTMLParser LinguaStem MemoizeExpireLRU ];
       meta = {
         description = "Part-of-speech tagger for English natural language processing";
  -      license = with lib.licenses; [ gpl3 ];
  +      license = with lib.licenses; [ gpl3Only ];
       };
     };
   
  
positive.code:     doCheck = true;
      meta = {
        description = "Calculate the similarity of two strings";
        license = with lib.licenses; [ gpl2 ];
      };
    };
  
  
negative.code:     meta = {
        description = "Integrate Cairo into the Glib type system";
        homepage = "http://gtk2-perl.sourceforge.net";
        license = with lib.licenses; [ lgpl21Only ];
      };
    };
  
  