{ lib, buildPythonPackage, fetchPypi, pythonOlder, isPy3k, isPyPy, python }: let testDir = if isPy3k then "src" else "python2"; in buildPythonPackage rec { pname = "typing"; version = "3.6.6"; src = fetchPypi { inherit pname version; sha256 = "4027c5f6127a6267a435201981ba156de91ad0d1d98e9ddc2aa173453453492d"; }; # Error for Python3.6: ImportError: cannot import name 'ann_module' # See https://github.com/python/typing/pull/280 # Also, don't bother on PyPy: AssertionError: TypeError not raised doCheck = pythonOlder "3.6" && !isPyPy; checkPhase = '' cd ${testDir} ${python.interpreter} -m unittest discover ''; meta = with lib; { description = "Backport of typing module to Python versions older than 3.5"; homepage = https://docs.python.org/3/library/typing.html; license = licenses.psfl; }; }