{stdenv, python27Packages, cffi, openssl_1_1, ipaddress, idna, asn1crypto, six, enum34}: python27Packages.buildPythonPackage rec {
  pname = "cryptography";
  version = "2.0.3";
  format = "setuptools";

  src = python27Packages.fetchPypi {
    inherit pname version;
    extension = "tar.gz";
    hash = "sha256-0EuyQlCGw/6G97xIkVKQsT55hJeDn7sYq39t/8+YzDo=";
  };

  env = {
        NIX_CFLAGS_COMPILE="-Wno-incompatible-pointer-types";
    };

  propagatedBuildInputs = [python27Packages.setuptools cffi ipaddress idna asn1crypto six enum34];
  buildInputs = [openssl_1_1];
}