You're looking at StableBuild's Deleted PyPI mirror - where we index all deleted packages from the Python package registry.

xaal.bugone
0.121

This version was deleted from PyPI around 2024-07-16. Installing fails with:
$ pip3 install xaal.bugone==0.121 ERROR: Could not find a version that satisfies the requirement xaal.bugone==0.121

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/2024-07-15/ \ xaal.bugone==0.121
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Or, download files manually

And install manually via pip: