diff --git a/Makefile b/Makefile
index ab1fd0d6..886e1703 100644
--- a/Makefile
+++ b/Makefile
@@ -191,7 +191,7 @@ all: uncompressed
 
 init:
 	$(MAKE) clean
-	$(MAKE) extract -j
+	$(MAKE) extract -j $(nproc)
 	$(MAKE) all
 
 uncompressed: $(ROM)