--- ext/augeas/extconf.rb.orig	Wed Dec 31 16:00:00 1969
+++ ext/augeas/extconf.rb	Mon Jun 20 18:55:11 2016
@@ -23,12 +23,8 @@ require 'mkmf'
 
 extension_name = '_augeas'
 
-unless pkg_config("augeas")
-    raise "augeas-devel not installed"
-end
-
-unless pkg_config("libxml-2.0")
-    raise "libxml2-devel not installed"
-end
+have_library('augeas')
+have_library('xml2')
+$CPPFLAGS << " -I${LOCALBASE}/include/libxml2"
 
 create_makefile(extension_name)