pubpypack-harmony-mitch-chapman
This package was deleted from PyPI around 2024-02-18. Installing fails with:
$ pip3 install pubpypack-harmony-mitch-chapman
ERROR: Could not find a version that satisfies the requirement pubpypack-harmony-mitch-chapman (from versions: none)
ERROR: No matching distribution found for pubpypack-harmony-mitch-chapman

Install through StableBuild
You can install this package from StableBuild's PyPI snapshots from before the version was deleted:
pip3 install \
-i https://YOUR_API_KEY.pypimirror.stablebuild.com/2024-02-17/ \
pubpypack-harmony-mitch-chapman
Sign up for StableBuild to get an API key (it's free and takes <60 seconds!)