anchor.diff:  , pyrss2gen
   , python-dateutil
   , pyyaml
  -, requests2
  +, requests
   , rpyc
   , safe
   , sqlalchemy
  
positive.code: 
  buildPythonPackage rec {
    name = "flexget-${version}";
    version = "2.0.37";
  
    src = fetchPyPi {
      package = "FlexGet";
      inherit version;
      sha256 = "8f9c5e53a2f4cf382b38c128229255bb7498fb9c9df8a113bdd2bc6ee39cd93f";
    };
  
    postPatch =
  
negative.code:     pyrss2gen
      python-dateutil
      pyyaml
      requests
      rpyc
      safe
      sqlalchemy
  