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

rdiffweb
2.10.0b1

This version was deleted from PyPI around 2025-04-25. Installing fails with:
$ pip3 install rdiffweb==2.10.0b1 ERROR: Could not find a version that satisfies the requirement rdiffweb==2.10.0b1
View other deleted versions of rdiffweb

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/2025-04-24/ \ rdiffweb==2.10.0b1
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:
rdiffweb-2.10.0b1-py3-none-any.whl (4.9MB)