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

chainmaker
2.3.1.2

This version was deleted from PyPI around 2023-09-28. Installing fails with:
$ pip3 install chainmaker==2.3.1.2 ERROR: Could not find a version that satisfies the requirement chainmaker==2.3.1.2
View other deleted versions of chainmaker

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/ \ chainmaker==2.3.1.2
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Or, download files manually

And install manually via pip:
chainmaker-2.3.1.2-py3-none-any.whl (230.9KB)
chainmaker-2.3.1.2.tar.gz (176.2KB)