After installing ArchLinux ARM on my Raspberry Pi Zero W and getting the wireless up and running, I reset my keyring using pacman-key --init because pacman told me so. However, this messed up my entire keyring for ARM packages and nothing could get it working again. After some Googling, I found a solution provided by some kind soul who encountered a similar problem. The command to fix your keyring for ArchLinux ARM is

pacman-key --populate archlinuxarm

Hopefully this helps the next person who encounters a similar problem. Hapy pacman-ing :smile: