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

hydrotrack
1.0.9rc0

This version was deleted from PyPI around 2023-09-28. Installing fails with:
$ pip3 install hydrotrack==1.0.9rc0 ERROR: Could not find a version that satisfies the requirement hydrotrack==1.0.9rc0
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/2023-09-27/ \ hydrotrack==1.0.9rc0
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-1.0.9rc0-py3-none-any.whl (28.4KB)
hydrotrack-1.0.9rc0.tar.gz (23.6KB)