MarsSeed [1] filed a deletion request for bibus [2]: Abandoned Python2 pkg from 2020. Broken due to problems with its dependencies and their bindings to binary libraries. Last comment is from 2016. Safe to delete. There are working alternatives for bibliographic reference helper applications. [1] https://aur.archlinux.org/account/MarsSeed/ [2] https://aur.archlinux.org/pkgbase/bibus/