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

c2r
1.0.0

This version was deleted from PyPI around 2026-02-04. Installing fails with:
$ pip3 install c2r==1.0.0 ERROR: Could not find a version that satisfies the requirement c2r==1.0.0
View other deleted versions of c2r

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/2026-02-03/ \ c2r==1.0.0
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:
c2r-1.0.0-cp311-cp311-win_amd64.whl (862.5KB)
c2r-1.0.0.tar.gz (29.4KB)