diff --git a/Makefile b/Makefile
index a279e85..1a8c807 100644
--- a/Makefile
+++ b/Makefile
@@ -1,5 +1,4 @@
 all:
-	cat uvm32/uvm32.h uvm32/uvm32.c uvm32/mini-rv32ima.h common/*.h > uvm32-single-file.c
 	(cd host && make)
 	(cd host-mini && make)
 	(cd host-parallel && make)