--- interface/Makefile.in.orig	2012-06-28 23:14:25.000000000 +0900
+++ interface/Makefile.in	2012-10-13 00:59:03.000000000 +0900
@@ -340,7 +340,6 @@
 
 INCLUDES = \
 	-I$(top_srcdir)/timidity \
-	-I$(top_srcdir)/libarc \
 	-I$(top_srcdir)/utils