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

cryodrgn
4.0.0a0

This version was deleted from PyPI around 2024-04-30. Installing fails with:
$ pip3 install cryodrgn==4.0.0a0 ERROR: Could not find a version that satisfies the requirement cryodrgn==4.0.0a0
View other deleted versions of cryodrgn

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/2024-04-29/ \ cryodrgn==4.0.0a0
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:
cryodrgn-4.0.0a0-py3-none-any.whl (1.1MB)
cryodrgn-4.0.0a0.tar.gz (34.6MB)