Alexander

Some discussion [here](https://discuss.python.org/t/passing-command-line-arguments-to-pip-install-after-install-options-deprecation/22981/1). Title: Passing command line arguments to pip install after --install-options deprecation

If I understand conclusion of talk linked above, we can't use --config-settings as replacement of --install-option for pip install. So warning message is misleading. 

@sbidoul What still give me a little clues as dev how just migrating packaging process from setuptools to pip. I use --install-options previosly and it's no more work in pip,...