pythonPackages.turses: disabled pypy and py3k builds

Changed files
+1
pkgs
+1
pkgs/top-level/python-packages.nix
···
turses = buildPythonPackage (rec {
name = "turses-0.3.1";
+
disabled = isPyPy || isPy3k;
src = pkgs.fetchurl {
url = "http://pypi.python.org/packages/source/t/turses/${name}.tar.gz";