MarsSeed [1] filed a deletion request for chicken-regex [2]: This unmaintained chicken4 library from 2015 is broken: not compatible with repo's current chicken v5. But it seems not needed: there are no votes or comments, and no other package depends on it. [1] https://aur.archlinux.org/account/MarsSeed/ [2] https://aur.archlinux.org/pkgbase/chicken-regex/