MarsSeed [1] filed a deletion request for celt-git [2]: Upstream development stopped 12 years ago. [a] Packaging fails in check. Not useful to keep.
There's still a working AUR/celt package [b], maintained by long-time AUR PM @dbermond and co-maintainer is Arch Developer @dvzrv. [a]: https://gitlab.xiph.org/xiph/celt [b]: https://aur.archlinux.org/packages/celt [1] https://aur.archlinux.org/account/MarsSeed/ [2] https://aur.archlinux.org/pkgbase/celt-git/
