{ stdenv, fetchPypi, buildPythonPackage, persistent, zope_interface, transaction }: buildPythonPackage rec { pname = "BTrees"; version = "4.4.1"; name = "${pname}-${version}"; buildInputs = [ transaction ]; propagatedBuildInputs = [ persistent zope_interface ]; src = fetchPypi { inherit pname version; sha256 = "a2738b71693971c1f7502888d649bef270c65f026db731e03d53f1ec4edfe8a3"; }; meta = with stdenv.lib; { description = "Scalable persistent components"; homepage = http://packages.python.org/BTrees; license = licenses.zpt21; }; }