You're looking at StableBuild's Deleted PyPI mirror - where we index all deleted packages from the Python package registry.
celium-collateral-upgrade was reported malicious
OSV:MAL-2026-52 - Malicious code in celium-collateral-upgrade (PyPI)

celium-collateral-upgrade
1.1.7

This version was deleted from PyPI around 2026-01-06. Installing fails with:
$ pip3 install celium-collateral-upgrade==1.1.7 ERROR: Could not find a version that satisfies the requirement celium-collateral-upgrade==1.1.7
View other deleted versions of celium-collateral-upgrade

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/2026-01-05/ \ celium-collateral-upgrade==1.1.7
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:
celium_collateral_upgrade-1.1.7-py3-none-any.whl (37.8KB)
celium_collateral_upgrade-1.1.7.tar.gz (32.4KB)