anchor.diff:  
     propagatedBuildInputs = [
       dateutil gflags httplib2 parsedatetime six vobject
  -    # overridden
       google_api_python_client oauth2client uritemplate
     ] ++ lib.optional (!isPy3k) futures;
   
  
positive.code:   doCheck = false;
  
    meta = with lib; {
      homepage = https://github.com/insanum/gcalcli;
      description = "CLI for Google Calendar";
      license = licenses.mit;
      maintainers = with maintainers; [ nocoolnametom ];
      inherit version;
  
negative.code: { stdenv, lib, fetchFromGitHub, python3
  , libnotify ? null }:
  
  with python3.pkgs;
  
  buildPythonApplication rec {
    version = "4.0.0a4";
    name = "gcalcli-${version}";
  
  