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

gff2mss
4.1.2

This version was deleted from PyPI around 2025-06-25. Installing fails with:
$ pip3 install gff2mss==4.1.2 ERROR: Could not find a version that satisfies the requirement gff2mss==4.1.2
View other deleted versions of gff2mss

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/2025-06-24/ \ gff2mss==4.1.2
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:
gff2mss-4.1.2-py3-none-any.whl (13.2KB)
gff2mss-4.1.2.tar.gz (15.7KB)