MarsSeed [1] filed a deletion request for proot-3.2.1 [2]: Orphan legacy package from 2017. Nothing depends on it. AUR has a package for the latest version, which is 5.4.0.
[1] https://aur.archlinux.org/account/MarsSeed/ [2] https://aur.archlinux.org/pkgbase/proot-3.2.1/
