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

antcal
0.0.16

This version was deleted from PyPI around 2023-12-15. Installing fails with:
$ pip3 install antcal==0.0.16 ERROR: Could not find a version that satisfies the requirement antcal==0.0.16
View other deleted versions of antcal

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/2023-12-14/ \ antcal==0.0.16
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:
antcal-0.0.16-py3-none-any.whl (15.8KB)
antcal-0.0.16.tar.gz (78.2KB)