Merge https://github.com/pypa/distutils

setuptools/_distutils/command/_framework_compat.py

@@ -7,18 +7,21 @@
 import os
 import functools
 import subprocess
+import sysconfig
 
 
 @functools.lru_cache()
 def enabled():
     """
-    Only enabled for Python 3.9 framework builds except ensurepip and venv.
+    Only enabled for Python 3.9 framework homebrew builds
+    except ensurepip and venv.
     """
     PY39 = (3, 9) < sys.version_info < (3, 10)
     framework = sys.platform == 'darwin' and sys._framework
+    homebrew = "Cellar" in sysconfig.get_config_var('projectbase')
     venv = sys.prefix != sys.base_prefix
     ensurepip = os.environ.get("ENSUREPIP_OPTIONS")
-    return PY39 and framework and not venv and not ensurepip
+    return PY39 and framework and homebrew and not venv and not ensurepip
 
 
 schemes = dict(