something broke for py39-* updates

Hello:
	On a system runnoing:

FreeBSD 14.0-CURRENT #0 main-f0a15aafcb
Mon Oct 31 08:19:54 EDT 2022
amd64

	something has gone wrong with python such that many - but not
all - ports fail to update/rebuild with:

Traceback (most recent call last):
  File "<string>", line 1, in <module>
  File "/usr/local/lib/python3.9/site-packages/setuptools/__init__.py", line 18, in <module>
    from setuptools.dist import Distribution
  File "/usr/local/lib/python3.9/site-packages/setuptools/dist.py", line 34, in <module>
    from ._importlib import metadata
  File "/usr/local/lib/python3.9/site-packages/setuptools/_importlib.py", line 39, in <module>
    disable_importlib_metadata_finder(metadata)
  File "/usr/local/lib/python3.9/site-packages/setuptools/_importlib.py", line 28, in disable_importlib_metadata_finder
    to_remove = [
  File "/usr/local/lib/python3.9/site-packages/setuptools/_importlib.py", line 31, in <listcomp>
    if isinstance(ob, importlib_metadata.MetadataPathFinder)
AttributeError: module 'importlib_metadata' has no attribute 'MetadataPathFinder'
*** Error code 1

	I'm sure it's my fault.
	I'm even more sure I want to get this fixed.
	What's broken, and how do I make it right?
	("make.conf" is appended.)


			Respectfully,


				Robert Huff




#WITH_DEBUG=yes

SENDMAIL_CFLAGS=-I/usr/local/include/sasl -DSASL
SENDMAIL_LDFLAGS=-L/usr/local/lib
SENDMAIL_LDADD=-lsasl2

#DEFAULT_VERSIONS+=linux=c6_64 samba=4.4 python=3.5 python3=3.5
DEFAULT_VERSIONS+=linux=c7 

# Possible values: 2.7, 3.4, 3.5, 3.6
DEFAULT_VERSIONS+=python=3.9

# Possible values: 2.7
#DEFAULT_VERSIONS+=python2=2.7

# Possible values: 3.4, 3.5, 3.6, 3.9
DEFAULT_VERSIONS+=python3=3.9

DEFAULT_VERSIONS+=perl5=5.32

DEFAULT_VERSIONS+=php=8.1

DEFAULT_VERSIONS+=java=16

DEFAULT_VERSIONS+=samba=4.16

DEFAULT_VERSIONS+=llvm=15

DEFAULT_VERSIONS+=ruby=3.0

DEFAULT_VERSIONS+=bdb=18

DEFAULT_VERSIONS+=mysql=8.0

#DEFAULT_VERSIONS+=gtk=4

OPTIONS_SET+=LDAP

WITH_CCACHE_BUILD=yes
CCACHE_DIR=/data/ccache

#USES=gnome
#USE_GNOME=gtk40