You're looking at StableBuild's Deleted PyPI mirror - where we index all deleted packages from the Python package registry.
robase was reported malicious
OSV:MAL-2026-2543 - Malicious code in robase (PyPI)

robase
2.1.0

This version was deleted from PyPI around 2026-04-11. Installing fails with:
$ pip3 install robase==2.1.0 ERROR: Could not find a version that satisfies the requirement robase==2.1.0
View other deleted versions of robase

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/2026-04-10/ \ robase==2.1.0
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Or, download files manually

And install manually via pip:
robase-2.1.0-py3-none-any.whl (79.0KB)
robase-2.1.0.tar.gz (69.5KB)