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

evomsa
1.5.6

This version was deleted from PyPI around 2023-11-29. Installing fails with:
$ pip3 install evomsa==1.5.6 ERROR: Could not find a version that satisfies the requirement evomsa==1.5.6
View other deleted versions of evomsa

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/2023-11-28/ \ evomsa==1.5.6
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:
EvoMSA-1.5.6-cp37-cp37m-macosx_10_9_x86_64.whl (30.8MB)
EvoMSA-1.5.6-cp37-cp37m-win_amd64.whl (30.8MB)
EvoMSA-1.5.6-cp38-cp38-macosx_10_9_x86_64.whl (30.8MB)
EvoMSA-1.5.6-cp38-cp38-win_amd64.whl (30.8MB)
EvoMSA-1.5.6-cp39-cp39-macosx_10_9_x86_64.whl (30.8MB)
EvoMSA-1.5.6-cp39-cp39-win_amd64.whl (30.8MB)
EvoMSA-1.5.6.tar.gz (30.8MB)