Problems with python builds

I have a problem with building a python 3.7 project; nothing has actually changed in the python code since the last successful build, and other releases are building without a problem. It appears to be blowing up invoking tox at all:


Using the constant pip version might be helpful in your case;

python -m pip install pip==21.3.1

This command could be added to the before_install phase.


Travis CI Staff