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

aladin-ecg
1.0.0

This version was deleted from PyPI around 2026-08-17. Installing fails with:
$ pip3 install aladin-ecg==1.0.0 ERROR: Could not find a version that satisfies the requirement aladin-ecg==1.0.0