anchor.diff: -{ stdenv, buildPythonPackage, fetchPypi, python, pytest, glibcLocales, isPy37 }:
  +{ stdenv, buildPythonPackage, fetchPypi, pythonOlder, python, pytest, glibcLocales }:
   
   buildPythonPackage rec {
     version = "4.1.0";
     pname = "pyfakefs";
  +  disabled = pythonOlder "3.5";
   
     src = fetchPypi {
       inherit pname version;
  
positive.code:     description = "Fake file system that mocks the Python file system modules";
      license     = licenses.asl20;
      homepage    = "http://pyfakefs.org/";
      maintainers = with maintainers; [ gebner ];
    };
  }
  
negative.code:       --replace "test_rename_dir_to_existing_dir" "notest_rename_dir_to_existing_dir"
    '');
  
    checkInputs = [ pytest glibcLocales ];
  
    checkPhase = ''
  