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

hydrotrack
1.2.4rc0

This version was deleted from PyPI around 2023-09-29. Installing fails with:
$ pip3 install hydrotrack==1.2.4rc0 ERROR: Could not find a version that satisfies the requirement hydrotrack==1.2.4rc0
View other deleted versions of hydrotrack

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/2023-09-28/ \ hydrotrack==1.2.4rc0
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:
hydrotrack-1.2.4rc0-py3-none-any.whl (29.4KB)
hydrotrack-1.2.4rc0.tar.gz (25.1KB)