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

ftbx
0.1.dev417

This version was deleted from PyPI around 2025-03-15. Installing fails with:
$ pip3 install ftbx==0.1.dev417 ERROR: Could not find a version that satisfies the requirement ftbx==0.1.dev417
View other deleted versions of ftbx

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/2025-03-14/ \ ftbx==0.1.dev417
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Or, download files manually

And install manually via pip:
ftbx-0.1.dev417-py3-none-any.whl (191.1KB)
ftbx-0.1.dev417.tar.gz (311.9KB)