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

c4dynamics
0.0.40

This version was deleted from PyPI around 2024-01-12. Installing fails with:
$ pip3 install c4dynamics==0.0.40 ERROR: Could not find a version that satisfies the requirement c4dynamics==0.0.40
View other deleted versions of c4dynamics

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/2024-01-11/ \ c4dynamics==0.0.40
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Or, download files manually

And install manually via pip:
c4dynamics-0.0.40-py3-none-any.whl (29.1KB)
c4dynamics-0.0.40.tar.gz (24.6KB)