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

mxcubecore
1.20.0

This version was deleted from PyPI around 2024-11-06. Installing fails with:
$ pip3 install mxcubecore==1.20.0 ERROR: Could not find a version that satisfies the requirement mxcubecore==1.20.0
View other deleted versions of mxcubecore

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/2024-11-05/ \ mxcubecore==1.20.0
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:
mxcubecore-1.20.0-py3-none-any.whl (30.4MB)
mxcubecore-1.20.0.tar.gz (27.6MB)