{stdenv, python27Packages, py}: python27Packages.buildPythonPackage rec {
  pname = "pytest";
  version = "3.2.1";
  format = "setuptools";

  src = python27Packages.fetchPypi {
    inherit pname version;
    extension = "tar.gz";
    hash = "sha256-TCFZ0r4rThP6KT56cr3y8GhIoBcVDVxtNREs5Rz9dM4=";
  };

  propagatedBuildInputs = [python27Packages.setuptools python27Packages.setuptools-scm py];
}