diff --git a/Makefile b/Makefile
index 5cdc68e..a261d79 100644
--- a/Makefile
+++ b/Makefile
@@ -1,6 +1,8 @@
 OUT=libscomp.a
+VERSION=0.1.0
 TESTS=test/input test/exec
 
+all: $(OUT) libscomm_amalg.c libscomm_amalg.h
 $(OUT): input.o exec.o
 	$(AR) rcs $(OUT) input.o exec.o
 tests: $(TESTS)
@@ -8,11 +10,12 @@ tests: $(TESTS)
 
 libscomm_amalg.h: exec.h input.h
 	echo '#pragma once' > libscomm_amalg.h
+	echo '#define LIBSCOMM_VERSION "${VERSION}"' >> libscomm_amalg.h
 	cat input.h exec.h | \
 	sed 's/#pragma .*//g; s/#include ".*//g' \
 	>> libscomm_amalg.h
 
-libscomm_amalg.c: exec.c input.c libscomm_amalg.h
+libscomm_amalg.c: exec.c input.c
 	echo '#include "libscomm_amalg.h"' > libscomm_amalg.c
 	cat exec.c input.c | sed 's/#include ".*//g' \
 	>> libscomm_amalg.c