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

cellacdc
1.2.4rc5

This version was deleted from PyPI around 2024-04-03. Installing fails with:
$ pip3 install cellacdc==1.2.4rc5 ERROR: Could not find a version that satisfies the requirement cellacdc==1.2.4rc5
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/2024-04-02/ \ cellacdc==1.2.4rc5
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Or, download files manually

And install manually via pip:
cellacdc-1.2.4rc5-py3-none-any.whl (47.1MB)
cellacdc-1.2.4rc5.tar.gz (48.7MB)