diff --git a/wscript b/wscript
index 6055bfd..9d9a879 100644
--- a/wscript
+++ b/wscript
@@ -1,8 +1,10 @@
 # -*- Mode: python; py-indent-offset: 4; indent-tabs-mode: nil; coding: utf-8; -*-
-import os
 
-VERSION='0.2'
-APPNAME='ndn-tools'
+VERSION = '0.2'
+APPNAME = 'ndn-tools'
+
+from waflib import Utils
+import os
 
 def options(opt):
     opt.load(['compiler_cxx', 'gnu_dirs'])
@@ -16,11 +18,8 @@
     conf.load(['compiler_cxx', 'gnu_dirs',
                'default-compiler-flags', 'sphinx_build', 'boost'])
 
-    if not os.environ.has_key('PKG_CONFIG_PATH'):
-        os.environ['PKG_CONFIG_PATH'] = ':'.join([
-            '/usr/lib/pkgconfig',
-            '/usr/local/lib/pkgconfig',
-            '/opt/local/lib/pkgconfig'])
+    if 'PKG_CONFIG_PATH' not in os.environ:
+        os.environ['PKG_CONFIG_PATH'] = Utils.subst_vars('${LIBDIR}/pkgconfig', conf.env)
     conf.check_cfg(package='libndn-cxx', args=['--cflags', '--libs'],
                    uselib_store='NDN_CXX', mandatory=True)