'nosetests --plugins' fails: No module named 'ConfigParser'

[yurivict]

$ nosetests --plugins
Traceback (most recent call last):
  File "/usr/local/bin/nosetests", line 3, in <module>
    from nose import main
  File "/usr/local/lib/python3.9/site-packages/nose/__init__.py", line 1, in <module>
    from nose.core import collector, main, run, run_exit, runmodule
  File "/usr/local/lib/python3.9/site-packages/nose/core.py", line 11, in <module>
    from nose.config import Config, all_config_files
  File "/usr/local/lib/python3.9/site-packages/nose/config.py", line 6, in <module>
    import ConfigParser
ModuleNotFoundError: No module named 'ConfigParser'

There's no 'require' clause in setup.py, so where is ConfigParser supposed to come from?

Version: 1.3.7
Python-3.9
FreeBSD 13.1