some notes of using febootstrap:

• hostfiles: The list of files that are to be copied from the host
• base.img: This uncompressed cpio file contains the skeleton filesystem

mkdir -pv arch
febootstrap -o arch --names $(pacman -Sgq base | tr "\n" " ")

febootstrap-supermin-helper -f ext2 arch x86_64 kernel initrd root

qemu-system-x86_64 root -kernel /boot/vmlinuz-linux -initrd /boot/initramfs-linux.img --append /dev/sda1