MarsSeed [1] filed a deletion request for python-piff [2]: This dual Py2/Py3 astronomical research package is severely broken. Orphaned, last updated in 2018. 0 votes, and only I commented a year ago about its brokenness. Best to delete from AUR. Scientists and other interested experts are best served by installing the maintained Conda-Forge or PyPI package. [1] https://aur.archlinux.org/account/MarsSeed/ [2] https://aur.archlinux.org/pkgbase/python-piff/