diff --git a/Rakefile b/Rakefile
index eb6d811..a218269 100644
--- a/Rakefile
+++ b/Rakefile
@@ -28,14 +28,6 @@ task :publish => [:rdoc] do
   Rake::RubyForgePublisher.new(GEM, RUBYFORGE_USER).upload
 end
 
-desc "Compile the extension"
-task :compile do
-  cd 'ext/cbson'
-  ruby 'extconf.rb'
-  sh 'make'
-  cp "cbson.#{CONFIG['DLEXT']}", '../../lib/mongo/ext'
-end
-
 namespace :gem do
 
   desc "Install the gem locally"
@@ -47,6 +39,15 @@ gem build mongo-ruby-driver.gemspec &&
 EOS
   end
 
+  desc "Install the optional c extensions"
+  task :install_extensions do
+    sh <<EOS
+gem build mongo-extensions.gemspec &&
+    sudo gem install mongo_ext-*.gem &&
+    rm mongo_ext-*.gem
+EOS
+  end
+
 end
 
 task :default => :list
diff --git a/ext/cbson/extconf.rb b/ext/cbson/extconf.rb
index ff9c97b..4e04612 100644
--- a/ext/cbson/extconf.rb
+++ b/ext/cbson/extconf.rb
@@ -1,4 +1,4 @@
 require 'mkmf'
 
 dir_config('cbson')
-create_makefile('mongo-ext/ext/cbson')
+create_makefile('mongo_ext/cbson')