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

basejump-core
0.30.3

This version was deleted from PyPI around 2025-12-28. Installing fails with:
$ pip3 install basejump-core==0.30.3 ERROR: Could not find a version that satisfies the requirement basejump-core==0.30.3
View other deleted versions of basejump-core

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/2025-12-27/ \ basejump-core==0.30.3
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Or, download files manually

And install manually via pip:
basejump_core-0.30.3-py3-none-any.whl (128.0KB)
basejump_core-0.30.3.tar.gz (167.9KB)