diff --git a/Makefile b/Makefile
index 00de4f4..ed3aca3 100644
--- a/Makefile
+++ b/Makefile
@@ -21,15 +21,20 @@ prepare: .prepared
 
 host-tools: .host-tools
 
-images/rootfs.squashfs: \
+.built: \
 		build.sh \
 		build-rootfs.sh \
-		build-squashfs.sh \
 		linux/arch/arm64/boot/Image.gz \
 		.host-tools \
 		.prepared
 	./build.sh
 	./build-rootfs.sh
+	touch .built
+
+images/rootfs.squashfs: \
+		build-squashfs.sh \
+		squashfs.exclude \
+		.built
 	./build-squashfs.sh
 
 squashfs: images/rootfs.squashfs