--- Makefile.in.orig	2007-08-04 02:28:25.000000000 +0900
+++ Makefile.in	2007-10-07 03:17:50.000000000 +0900
@@ -205,7 +205,7 @@
         README README.CVS README.OSX README.win32 bootstrap \
 	config.windows/IlmBaseConfig.h
 
-pkgconfigdir = $(libdir)/pkgconfig
+pkgconfigdir = $(prefix)/libdata/pkgconfig
 pkgconfig_DATA = IlmBase.pc
 all: all-recursive
 
