a : let fetchurl = a.fetchurl; version = a.lib.attrByPath ["version"] "0.13" a; propagatedBuildInputs = with a; [ openssl python ]; in rec { src = fetchurl { url = "http://pypi.python.org/packages/source/p/pyOpenSSL/pyOpenSSL-${version}.tar.gz"; sha256 = "21e12b03abaa0e04ecc8cd9c251598f71bae11c9f385304234e4ea5618c6163b"; }; inherit propagatedBuildInputs; configureFlags = []; /* doConfigure should be removed if not needed */ phaseNames = ["installPythonPackage"]; name = "pyOpenSSL-" + version; meta = { description = "Python OpenSSL wrapper capable of checking certificates"; }; }