MadPhysicist [1] filed a orphan request for ruby-posix-spawn [2]:

I would like to adopt this package so that ruby-git-up can be built from the new AUR. This package is an indirect dependency via ruby-grit. I have created an updated PKGBUILD and signed up for notifications on the source.

[1] https://aur4.archlinux.org/account/MadPhysicist/ [2] https://aur4.archlinux.org/pkgbase/ruby-posix-spawn/