+build_efi()
+{
+(
+ rm -rf EFI
+ mkdir -p EFI/boot
+ cp testing/usr/lib/grub/arm64-efi/monolithic/grubaa64.efi EFI/boot/bootaa64.efi
+
+ export INITRD=`ls -1 testing/boot/ | grep initrd`
+ export VMLINUZ=`ls -1 testing/boot/ | grep vmlinuz`
+ export UUID=`blkid media | awk -F\" '{print $2}'`
+ cat > EFI/boot/grub.cfg <<EOF
+search.fs_uuid ${UUID} root
+set prefix=(\$root)'/boot/'
+linux $VMLINUZ root=UUID=${UUID} ro
+inird $INITRD
+boot
+EOF
+ tar czf efi.tgz EFI
+)
+}
+