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

cachetools
6.0.0b4

This version was deleted from PyPI around 2025-05-24. Installing fails with:
$ pip3 install cachetools==6.0.0b4 ERROR: Could not find a version that satisfies the requirement cachetools==6.0.0b4
View other deleted versions of cachetools

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/2025-05-23/ \ cachetools==6.0.0b4
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:
cachetools-6.0.0b4-py3-none-any.whl (10.7KB)
cachetools-6.0.0b4.tar.gz (29.3KB)