title: Launching a specific simulator in irb using Calabash iOS
body: <p>I am using Calabash for iOS testing and when I go into <code>calabash-ios console</code>, open the irb and enter <code>start_test_server_in_background</code> it launches the simulator. The problem that I am having is its building a simulator that I don't want to work with anymore. I started using the 5s simulator, but now I want it to build the 6s when i enter <code>start_test_server_in_background</code>. </p>
  
  <p>Is there an environmental variable that needs to be set or one I can pass in a variable in the console while entering <code>start_test_server_in_background</code>?</p>