seeding a virtualenv does not work correctly in 3.8
calling python --upgrade pip 'setuptools<49.2.0' wheel
when a pypy3.8 virtualenv is activated fails to downgrade setuptools:
Requirement already satisfied: pip in /home/matti/oss/pypy3.8-HEAD/lib/pypy3.8/site-packages (21.2.4)
Collecting setuptools<49.2.0
Using cached setuptools-49.1.3-py3-none-any.whl (789 kB)
Requirement already satisfied: wheel in /home/matti/oss/pypy3.8-HEAD/lib/pypy3.8/site-packages (0.37.0)
Installing collected packages: setuptools
Attempting uninstall: setuptools
Found existing installation: setuptools 58.1.0
Not uninstalling setuptools at /home/matti/oss/pypy3.8-HEAD/lib/pypy3.8/site-packages, outside environment /tmp/venv_pypy38
Can't uninstall 'setuptools'. No files were found to uninstall.
Successfully installed setuptools-58.1.0