MarsSeed [1] filed a deletion request for fbuild [2]: Discontinued experimental Python based build system from 2018, defunct package, not needed anymore by any other packages. (Not even by the broken uterm-git, submitted for deletion - PRQ#49084).
[1] https://aur.archlinux.org/account/MarsSeed/ [2] https://aur.archlinux.org/pkgbase/fbuild/
