Add to /etc/pacman.conf:
[damfle] Server = https://damfle.github.io/archlinux-packages/$repo/$arch SigLevel = Optional TrustAll
mkinitcpio-install-tools-1.0-1-x86_64.pkg.tar.zst
mkinitcpio-sd-zfs-poscat-0.1-1-any.pkg.tar.zst
pacman-zfs-hook-1.0.2-2-x86_64.pkg.tar.zst
shh-2025.9.22-1-x86_64.pkg.tar.zst
shh-debug-2025.9.22-1-x86_64.pkg.tar.zst
zfs-dkms-2.3.4-1-any.pkg.tar.zst