MarsSeed [1] filed a deletion request for python-pymc3 [2]: Orphaned legacy package, last updated 2 years ago. This year, the project renamed its Python 3 module to PyMC (without the number '3' in the name), and released v4.0.0. [a] It seems there is no interest in AUR community to maintain this one. But as nothing depends on this package here, I suggest deletion. [a]: https://pypi.org/project/pymc/4.0.0/ [1] https://aur.archlinux.org/account/MarsSeed/ [2] https://aur.archlinux.org/pkgbase/python-pymc3/