pip3 warning message since 3.9 downgrade

Since -current's downgrade back to Python 3.9, I have been getting this warning message when installing packages locally with pip3:

Code:WARNING: Value for scheme.purelib does not match. Please report this to <https://github.com/pypa/pip/issues/10151>
distutils: /home/(REMOVED)/.local/lib/python3.9/site-packages
sysconfig: /home/(REMOVED)/.local/lib64/python3.9/site-packages
WARNING: Additional context:
user = True
home = None
root = None
prefix = None