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

quantumtuna
0.7.1

This version was deleted from PyPI around 2025-09-06. Installing fails with:
$ pip3 install quantumtuna==0.7.1 ERROR: Could not find a version that satisfies the requirement quantumtuna==0.7.1

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/2025-09-05/ \ quantumtuna==0.7.1
Sign up for StableBuild to get an API key (it's free and takes <60 seconds!)