The hook callable has to be an Action builder so the hooks are called

lib/vagrant/environment.rb

@@ -245,7 +245,7 @@ module Vagrant
     # @param [Symbol] name Name of the hook.
     def hook(name)
       @logger.info("Running hook: #{name}")
-      callable = Proc.new {}
+      callable = Action::Builder.new
       action_runner.run(callable, :action_name => name)
     end