Index: Makefile
===================================================================
--- Makefile	(revision e8f6f94c5180703f29cf800251082aa6fca19cb3)
+++ Makefile	(revision 888a2c6b5494acd8c90d49e4cb3d98f1ed7cb0fc)
@@ -103,5 +103,5 @@
 	$(CHECK) -j $(JOBS)
 else
-	$(CHECK)
+	$(CHECK) -j $(shell nproc)
 endif