On systems with a newer python:3.8-alpine image, installing python3-dev can now only install a python-dev=3.9.* anymore. Thus, pipenv install will compile dependencies against python3.9, which is likely to fail. Pipenv also initializes the venv with python3.9, which always fails.
Solution: Switch from alpine to ubuntu instead.
On systems with a newer python:3.8-alpine image, installing python3-dev can now only install a python-dev=3.9.* anymore. Thus, pipenv install will compile dependencies against python3.9, which is likely to fail. Pipenv also initializes the venv with python3.9, which always fails. Solution: Switch from alpine to ubuntu instead.