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

cellacdc
1.2.4rc12

This version was deleted from PyPI around 2025-03-11. Installing fails with:
$ pip3 install cellacdc==1.2.4rc12 ERROR: Could not find a version that satisfies the requirement cellacdc==1.2.4rc12
View other deleted versions of cellacdc

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/2025-03-10/ \ cellacdc==1.2.4rc12
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Or, download files manually

And install manually via pip:
cellacdc-1.2.4rc12-py3-none-any.whl (47.1MB)
cellacdc-1.2.4rc12.tar.gz (48.8MB)