anchor.diff:  
   buildPythonPackage rec {
     pname = "fonttools";
  -  version = "3.40.0";
  +  version = "3.41.0";
   
     src = fetchPypi {
       inherit pname version;
  -    sha256 = "11x7kjkwk7in84wjvqlbbp4rshj6m8c4259j5z39x16l9smg5idi";
  +    sha256 = "1f3q9sadwy6krsjicrgjsl1w2dfd97j4l645lnl1f5y3y1jkj4fh";
       extension = "zip";
     };
   
  
positive.code: { buildPythonPackage
  , fetchPypi
  , numpy
  , pytest
  
negative.code:   meta = {
      homepage = https://github.com/fonttools/fonttools;
      description = "A library to manipulate font files from Python";
      license = lib.licenses.mit;
    };
  }
  