title: Capistrano multistage variables
body: <p>When using ext/multistage, why aren't the variables that are set in a stage (production.rb) available in deploy.rb?</p>
  
  <p>In production.rb: <code>set :domain, "domain.com"</code></p>
  
  <p>In deploy.rb: <code>set :vhost, "/var/www/#{domain}"</code></p>
  
  <p>But when I try to run, it complains </p>
  
  <pre><code>undefined local variable or method `domain' for #&lt;Capistrano::Configuration:0x00000100d07248&gt; (NameError)
  </code></pre>