anchor.diff:      LC_ALL="en_US.UTF-8" py.test
     '';
   
  -#   doCheck = false;
  -
     meta = {
       description = "Traitlets Python config system";
       homepage = "http://ipython.org/";
  
positive.code: buildPythonPackage rec {
    pname = "traitlets";
    version = "5.0.5";
  
    src = fetchPypi {
      inherit pname version;
  
negative.code: { lib
  , buildPythonPackage
  , isPy27
  , fetchPypi
  , glibcLocales
  , pytest
  