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

c4dynamics
1.0.90

This version was deleted from PyPI around 2024-02-18. Installing fails with:
$ pip3 install c4dynamics==1.0.90 ERROR: Could not find a version that satisfies the requirement c4dynamics==1.0.90
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/2024-02-17/ \ c4dynamics==1.0.90
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:
c4dynamics-1.0.90-py3-none-any.whl (219.9MB)
c4dynamics-1.0.90.tar.gz (219.9MB)