MarsSeed [1] filed a deletion request for checkmate [2]: Unused, abandoned scientific Python2 pkg from 2019. There's a "checkmate2" fork/continuation that supports Python3, but former maintainer disowned this because of lack of need on their part, and apart from his recent comment mentioning it, last comments are from 2017. So it seems no one else is using this anymore. [1] https://aur.archlinux.org/account/MarsSeed/ [2] https://aur.archlinux.org/pkgbase/checkmate/