retr0reg-pip-carepackage
This package was deleted from PyPI around 2025-05-01. Installing fails with:
$ pip3 install retr0reg-pip-carepackage
ERROR: Could not find a version that satisfies the requirement retr0reg-pip-carepackage (from versions: none)
ERROR: No matching distribution found for retr0reg-pip-carepackage

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/2025-04-30/ \
retr0reg-pip-carepackage
Sign up for StableBuild to get an API key (it's free and takes <60 seconds!)