diff --git a/build-root/Makefile b/build-root/Makefile
index d69a94c..df4434d 100644
--- a/build-root/Makefile
+++ b/build-root/Makefile
@@ -997,7 +997,7 @@
 		| xargs sign $($(PLATFORM)_public_key)			\
 			     $($(PLATFORM)_private_key_passphrase) ;	\
 	  fi ;								\
-	  : make read-only file system ;				\
+	  : $(MAKE) read-only file system ;				\
 	  mksquashfs							\
 	    $${tmp_dir} $${ro_image}					\
 	    -no-exports -no-progress -no-recovery ;			\