anchor.diff:  , fetchPypi
   , pythonOlder
   , lib
  -, setuptools_scm
  +, setuptools-scm
   , pytest
   , typing-extensions
   , glibcLocales
  
positive.code: 
  buildPythonPackage rec {
    pname = "typeguard";
    version = "2.11.1";
  
    src = fetchPypi {
      inherit pname version;
      sha256 = "33243c1cbfcb9736a06c6db22dd08876b5f297e6344aa272a2862c0f8e669f64";
    };
  
    buildInputs = [ setuptools_scm ];
    nativeBuildInputs = [ glibcLocales ];
  
    LC_ALL="en_US.utf-8";
  
negative.code: 
    checkInputs = [ pytest typing-extensions ];
  
    # mypy tests aren't passing with latest mypy
    checkPhase = ''
      py.test . --ignore=tests/mypy
    '';
  
    disabled = pythonOlder "3.3";
  