anchor.diff:    src = fetchPyPi {
       package = "APScheduler";
       inherit version;
  -    sha256 = "6599bc78901ee7e9be85cbd073d9cc155c42d2bc867c5cde4d4d1cc339ebfbeb";
  +    sha256 = "8f56b888fdc9dc57dd18d79c124b5093a01e29144be84e3e99130600eea34260";
     };
   
     propagatedBuildInputs = [
  
positive.code:     tornado
      twisted
      /* job stores */
      pymongo
      redis
      #rethinkdb
  
negative.code:   inherit (lib)
      optionals;
  
    version = "3.6.0";
  in
  buildPythonPackage rec {
    name = "apscheduler-${version}";
  