insmod efi_gop

menuentry 'Arch Linux' {
    probe -u $root -s uuid
    set isofile=/archlinux-2017.03.01-dual.iso
    loopback loop $isofile
    linux (loop)/arch/boot/x86_64/vmlinuz img_dev=/dev/disk/by-uuid/$uuid img_loop=$isofile
    initrd (loop)/arch/boot/x86_64/archiso.img
}