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

amulet-qt-dev
6.9.1.0a1

This version was deleted from PyPI around 2025-08-07. Installing fails with:
$ pip3 install amulet-qt-dev==6.9.1.0a1 ERROR: Could not find a version that satisfies the requirement amulet-qt-dev==6.9.1.0a1
View other deleted versions of amulet-qt-dev

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/2025-08-06/ \ amulet-qt-dev==6.9.1.0a1
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Or, download files manually

And install manually via pip:
amulet_qt_dev-6.9.1.0a1-py3-none-macosx_12_0_universal2.whl (89.7MB)
amulet_qt_dev-6.9.1.0a1.tar.gz (14.5KB)