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

ecoindex
2.11.0b1

This version was deleted from PyPI around 2024-01-31. Installing fails with:
$ pip3 install ecoindex==2.11.0b1 ERROR: Could not find a version that satisfies the requirement ecoindex==2.11.0b1
View other deleted versions of ecoindex

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/2024-01-30/ \ ecoindex==2.11.0b1
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:
ecoindex-2.11.0b1-py3-none-any.whl (7.2KB)
ecoindex-2.11.0b1.tar.gz (5.9KB)