diff --git a/wscript b/wscript
index 271b076..946bb5a 100644
--- a/wscript
+++ b/wscript
@@ -28,6 +28,7 @@
 
 from waflib import Build, Logs, Utils, Task, TaskGen, Configure, Context
 from waflib.Tools import c_preproc
+import os
 
 def options(opt):
     opt.load(['compiler_cxx', 'gnu_dirs'])
@@ -48,6 +49,9 @@
                'default-compiler-flags',
                'doxygen', 'sphinx_build'])
 
+    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)