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

hydrogenlib
1.1.26

This version was deleted from PyPI around 2025-01-15. Installing fails with:
$ pip3 install hydrogenlib==1.1.26 ERROR: Could not find a version that satisfies the requirement hydrogenlib==1.1.26
View other deleted versions of hydrogenlib

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/2025-01-14/ \ hydrogenlib==1.1.26
Sign up for StableBuild to get an API key (it's free and takes <60 seconds!)

Or, download files manually

And install manually via pip:
hydrogenlib-1.1.26-py3-none-any.whl (91.7KB)
hydrogenlib-1.1.26.tar.gz (73.4KB)