Fixed -- Reallowed editable install into user site directory.
Regression in
import os
+import site
import sys
from distutils.sysconfig import get_python_lib
from setuptools import setup
+# Allow editable install into user site directory.
+# See https://github.com/pypa/pip/issues/7953.
+site.ENABLE_USER_SITE = '--user' in sys.argv[1:]
+
# Warn if we are installing over top of an existing installation. This can
# cause issues where files that were deleted from a more recent Django are
# still present in site-packages. See #18115.
