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

ucdp-regf
15.0.0

This version was deleted from PyPI around 2025-07-30. Installing fails with:
$ pip3 install ucdp-regf==15.0.0 ERROR: Could not find a version that satisfies the requirement ucdp-regf==15.0.0
View other deleted versions of ucdp-regf

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/2025-07-29/ \ ucdp-regf==15.0.0
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:
ucdp_regf-15.0.0-py3-none-any.whl (27.2KB)
ucdp_regf-15.0.0.tar.gz (73.8KB)