MarsSeed [1] filed a deletion request for acpi_call-ck [2]: Orphaned, outdated package; last updated in 2020.
Not needed: the current extra/acpi_call-dkms can be installed for the linux-ck kernel as well. [1] https://aur.archlinux.org/account/MarsSeed/ [2] https://aur.archlinux.org/pkgbase/acpi_call-ck/
