{ buildPythonPackage , fetchPypi , lib , six , attrs , pytest , testtools }: buildPythonPackage rec { version = "0.11.0"; pname = "effect"; src = fetchPypi { inherit pname version; sha256 = "1q75w4magkqd8ggabhhzzxmxakpdnn0vdg7ygj89zdc9yl7561q6"; }; checkInputs = [ pytest testtools ]; propagatedBuildInputs = [ six attrs ]; checkPhase = '' pytest . ''; meta = with lib; { description = "Pure effects for Python"; homepage = https://github.com/python-effect/effect; license = licenses.mit; }; }