Command not found when In chroot

Im currently Porting Arch Linux to My phone and I am trying to set up the rootfs properly - have it installed to an external scdard and am using busybox to chroot into it with

I can see pacman exists when I search for it:

but whenever I try to install the base system with:

pacman -S base-devel 1lightdm xorg-xinit xfce4 networkmanager --needed I
get