MarsSeed [1] filed a deletion request for python-aesara-theano- fallback [2]: Deprecated/EOL library since almost 3 years ago. [a][b] Was only a temporary compatibility shim to aid the transition from the even earlier deprecated/dead Theano library to the successor named Aesara. No longer needed by any AUR package. [a]: https://pypi.org/project/aesara-theano-fallback [b]: https://github.com/exoplanet-dev/aesara-theano-fallback [1] https://aur.archlinux.org/account/MarsSeed/ [2] https://aur.archlinux.org/pkgbase/python-aesara-theano-fallback/