copy from linux-surface/aarch64-packages
import my signing key:
sudo pacman-key --recv-keys F60FD4C6D426DAB6
sudo pacman-key --lsign F60FD4C6D426DAB6
add the following session in your /etc/pacman.conf
:
[qcom]
Server = https://github.com/silime/ArchLinux-Packages/releases/download/$arch
#Server = https://github.com/silime/ArchLinux-Packages/releases/latest/download/ #daily