Rakefile in aigu-0.3.1 vs Rakefile in aigu-0.4

@@ -10,10 +10,10 @@
   task.pattern = 'spec/**/*_spec.rb'
 end
 
 desc 'Start an IRB session with the gem'
 task :console do
-  $:.unshift File.expand_path('..', __FILE__)
+  $LOAD_PATH.unshift File.expand_path('..', __FILE__)
   require 'aigu'
   require 'irb'
 
   ARGV.clear
   IRB.start