diff --git a/Makefile b/Makefile
index f4ace52..9610fec 100644
--- a/Makefile
+++ b/Makefile
@@ -796,7 +796,7 @@ $(BUILD)/clib2/_done: projects/clib2/LICENSE $(shell find 2>/dev/null projects/c
 	@mkdir -p $(BUILD)/clib2/
 	@rsync -a projects/clib2/library/* $(BUILD)/clib2
 	@cd $(BUILD)/clib2 && find * -name lib\*.a -delete
-	$(L0)"make clib2"$(L1) $(MAKE) -C $(BUILD)/clib2 -f GNUmakefile.68k $(L2)
+	$(L0)"make clib2"$(L1) $(MAKE) -C $(BUILD)/clib2 -f GNUmakefile.68k -j1 $(L2)
 	@mkdir -p $(PREFIX)/m68k-amigaos/clib2
 	@rsync -a $(BUILD)/clib2/include $(PREFIX)/m68k-amigaos/clib2
 	@rsync -a $(BUILD)/clib2/lib $(PREFIX)/m68k-amigaos/clib2