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']