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

opteryx-core
0.8.9

This version was deleted from PyPI around 2026-07-08. Installing fails with:
$ pip3 install opteryx-core==0.8.9 ERROR: Could not find a version that satisfies the requirement opteryx-core==0.8.9

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/2026-07-07/ \ opteryx-core==0.8.9
Sign up for StableBuild to get an API key (it's free and takes <60 seconds!)