Detailed steps to reproduce the problem?

$ brew install tox

$ python3 -m venv venv

$ . venv/bin/activate
$ python -m pip install "pymongo[gssapi,aws,ocsp,snappy,zstd,encryption,test]"
$ tox -m test

test: install_package> python -I -m pip install --force-reinstall --no-deps /Users/casey.clements/src/mongo-python-driver/.tox/.tmp/package/61/pymongo-4.7.0.dev0.tar.gz
test: commands[0]> python --version
Python 3.12.0
test: commands[1]> .evergreen/check-c-extensions.sh
Traceback (most recent call last):
  File "/Users/casey.clements/src/mongo-python-driver/setup.py", line 13, in <module>
    from setuptools import setup
ModuleNotFoundError: No module named 'setuptools'

Definition of done: what must be done to consider the task complete?

If I add setuptools as a dep in the test target in tox.ini, the problem goes away. This already exists in the test-eg target. No harm in adding it, even everyone does not encounter this.

The exact Python version used, with patch level:

$ python -c "import sys; print(sys.version)"

3.11.6 (v3.11.6:8b6ee5ba3b, Oct  2 2023, 11:18:21) [Clang 13.0.0 (clang-1300.0.29.30)]

The exact version of PyMongo used, with patch level:

$ python -c "import pymongo; print(pymongo.version); print(pymongo.has_c())"

4.7.0.dev0

Describe how MongoDB is set up. Local vs Hosted, version, topology, load balanced, etc.

Local

The operating system and version (e.g. Windows 7, OSX 10.8, ...)

OSX 12.3 M1