After chrooting in your system, all we need to do is to install some basic packages.
pacman -S base base-devel wpa-supplicant dialog bash-completion xterm
Setting up the Root GNU/Linux Password:
# passwd Changing password for root. Enter new UNIX password: Retype new UNIX password:
Exit chroot using Ctrl+D
Auto install syslinux:
syslinux-install_update -i -c /mnt
reboot the system
[ar{ch]ahat} 