SD card partition name, exec format error pacman

I tried to create Pi3 image on Arch, but the name of the SD card partition is in this format: ${DEV_NAME}p1, therefore changes are needed in lines 279, 280, 324 and 325.

When this is fixed the partitions are made, but the $NSPAWN $TMPDIR/root pacman -Syyu base manjaro-system manjaro-release systemd systemd-libs $PKG_DEVICE $PKG_EDITION --noconfirm shows execv(pacman) failed: Exec format error