--- Makefile.in.orig	2011-09-12 11:39:56.000000000 +0200
+++ Makefile.in	2011-09-12 11:40:48.000000000 +0200
@@ -270,7 +270,7 @@
 MAINTAINERCLEANFILES = Makefile.in aclocal.m4 config.h.in config.log configure \
 	stamp-h.in
 
-pkgconfigdir = $(libdir)/pkgconfig
+pkgconfigdir = $(prefix)/libdata/pkgconfig
 pkgconfig_DATA = libpqxx.pc
 bin_SCRIPTS = pqxx-config
 all: all-recursive