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

x4c
2024.6.28

This version was deleted from PyPI around 2024-08-25. Installing fails with:
$ pip3 install x4c==2024.6.28 ERROR: Could not find a version that satisfies the requirement x4c==2024.6.28
View other deleted versions of x4c

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/2024-08-24/ \ x4c==2024.6.28
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:
x4c-2024.6.28.tar.gz (10.7MB)