bbonev [1] filed a deletion request for libyascreen0 [2]: Please delete this package because it got renamed to yascreen and start using proper soname deps.
I am not very sure if didn't break the upgrade path with this [1] https://aur.archlinux.org/account/bbonev/ [2] https://aur.archlinux.org/pkgbase/libyascreen0/
