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

crc-ct
1.0.0rc6

This version was deleted from PyPI around 2025-11-10. Installing fails with:
$ pip3 install crc-ct==1.0.0rc6 ERROR: Could not find a version that satisfies the requirement crc-ct==1.0.0rc6
View other deleted versions of crc-ct

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/2025-11-09/ \ crc-ct==1.0.0rc6
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:
crc_ct-1.0.0rc6-cp35-cp35m-win_amd64.whl (16.6KB)
crc_ct-1.0.0rc6-cp35-cp35m-win32.whl (16.6KB)
crc_ct-1.0.0rc6-cp36-cp36m-win_amd64.whl (16.5KB)
crc_ct-1.0.0rc6-cp36-cp36m-win32.whl (16.5KB)
crc_ct-1.0.0rc6-cp37-cp37m-win_amd64.whl (16.5KB)
crc_ct-1.0.0rc6-cp37-cp37m-win32.whl (16.5KB)
crc_ct-1.0.0rc6-cp38-cp38-win_amd64.whl (16.5KB)
crc_ct-1.0.0rc6-cp38-cp38-win32.whl (16.5KB)
crc-ct-1.0.0rc6.zip (31.9KB)