Don't require out of load path

activesupport/Rakefile

@@ -88,7 +88,8 @@ task :release => [ :package ] do
 end
 
 
-require 'lib/active_support/values/time_zone'
+$LOAD_PATH.unshift "#{File.dirname(__FILE__)}/lib"
+require 'active_support/values/time_zone'
 
 namespace :tzinfo do
   desc "Update bundled tzinfo gem. Only copies the subset of classes and definitions required to support Rails time zone features."