--- Makefile.am.orig	2015-05-07 00:17:43.206572341 +0900
+++ Makefile.am	2015-05-07 00:18:35.853568427 +0900
@@ -11,7 +11,7 @@
 EXTRA_DIST = \
 		$(DOC_FILES) CMakeLists.txt test/CMakeLists.txt
 
-pkgconfigdir = $(libdir)/pkgconfig
+pkgconfigdir = $(prefix)/libdata/pkgconfig
 pkgconfig_DATA = msgpack.pc
 
 doxygen: