diff --git a/Makefile b/Makefile
index 6bff7be..83edadc 100644
--- a/Makefile
+++ b/Makefile
@@ -91,7 +91,7 @@ kernel: $(O)/linux/arch/arm64/boot/Image.gz
 $(O)/efi-part/EFI/BOOT/BOOTAA64.efi: \
 		build-grub.sh \
 		grub.cfg \
-		$(O)/.prepared
+		$(O)/.built
 	./build-grub.sh "$(O)"
 
 grub: $(O)/efi-part/EFI/BOOT/BOOTAA64.efi