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

karellen-llvm-clang
20.1.7.post10

This version was deleted from PyPI around 2025-07-26. Installing fails with:
$ pip3 install karellen-llvm-clang==20.1.7.post10 ERROR: Could not find a version that satisfies the requirement karellen-llvm-clang==20.1.7.post10
View other deleted versions of karellen-llvm-clang

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/2025-07-25/ \ karellen-llvm-clang==20.1.7.post10
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Or, download files manually

And install manually via pip:
karellen_llvm_clang-20.1.7.post10-py3-none-manylinux2014_x86_64.whl (72.3MB)