We only support Pythons with argparse on it
@@ -105,9 +105,7 @@ def expanduser(path):
# dist.location (py27:`sysconfig.get_paths()['stdlib']`,
# py26:sysconfig.get_config_vars('LIBDEST')), but fear platform variation may
# make this ineffective, so hard-coding
-stdlib_pkgs = ('python', 'wsgiref')
-if sys.version_info >= (2, 7):
- stdlib_pkgs += ('argparse',)
+stdlib_pkgs = {"python", "Wsgiref", "argparse"}
# windows detection, covers cpython and ironpython
