anchor.diff:      package = "Twisted";
       inherit version;
       type = ".tar.bz2";
  -    sha256 = "0207d88807482fa670a84926590e163a2a081a29745de34c5a6dc21066abae73";
  +    sha256 = "d0fe115ea7ef8cf632d05103de60356c6e992b2153d6830bdc4476f8accb1fca";
     };
   
     propagatedBuildInputs = [
  
positive.code: , buildPythonPackage
  , fetchPyPi
  , isPy3k
  
  , constantly
  , incremental
  
negative.code:   # Tests are not fully compatible with Python 3
    doCheck = !isPy3k;
  
    meta = with lib; {
      description = "An event-driven networking engine written in Python";
      homepage = https://twistedmatrix.com/;
      license = licenses.mit;
  