diff -up alexandria-0.6.8/util/rake/fileinstall.rb.fix alexandria-0.6.8/util/rake/fileinstall.rb
--- alexandria-0.6.8/util/rake/fileinstall.rb.fix	2012-03-23 12:15:39.827228029 -0400
+++ alexandria-0.6.8/util/rake/fileinstall.rb	2012-03-23 12:16:01.774011895 -0400
@@ -185,12 +185,12 @@ class FileInstallTask < Rake::TaskLib
   private
 
   def calculate_ruby_dir
-    ruby_prefix = Config::CONFIG['prefix']
+    ruby_prefix = RbConfig::CONFIG['prefix']
 
     if @install_to_rubylibdir
-      ruby_libdir = Config::CONFIG['rubylibdir']
+      ruby_libdir = RbConfig::CONFIG['rubylibdir']
     else
-      ruby_libdir = Config::CONFIG['sitelibdir']
+      ruby_libdir = RbConfig::CONFIG['sitelibdir']
     end
     if ENV.has_key?('RUBYLIBDIR')
       ruby_libdir = ENV['RUBYLIBDIR']