jprotopopov [1] filed a deletion request for kefir [2]: The public development of the project has ceased, and I do not intend to maintain the PKGBUILD anymore. Considering the recent attack on orphaned packages, I would opt for deleting kefir package completely.
[1] https://aur.archlinux.org/account/jprotopopov/ [2] https://aur.archlinux.org/pkgbase/kefir/
