diff --git a/Makefile b/Makefile
index 083e262..61b67de 100644
--- a/Makefile
+++ b/Makefile
@@ -16,7 +16,7 @@ CC=cc
 RUSTC=rustc
 
 # to build, first run ./configure
-include *.mk
+include cc.mk rustc.mk
 
 .PHONY: all
 all: dj false fop intcmp scrut str strcmp true