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

esmf-aspect-model-loader
0.1.17

This version was deleted from PyPI around 2023-12-15. Installing fails with:
$ pip3 install esmf-aspect-model-loader==0.1.17 ERROR: Could not find a version that satisfies the requirement esmf-aspect-model-loader==0.1.17

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/2023-12-14/ \ esmf-aspect-model-loader==0.1.17
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Or, download files manually

And install manually via pip: