title: Access to user environment variable
body: <p>In my .bashrc file:</p>
  
  <pre class="lang-bash prettyprint-override"><code>export DART_SDK=/home/nicolas/dart/dart-sdk
  </code></pre>
  
  <p>In command line, it works when I "echo" it. But I cannot see this user variable from <code>dart</code> with, I just see system variable but not mine:</p>
  
  <pre class="lang-dart prettyprint-override"><code>var env = Platform.environment;
  env.forEach((k,v) =&gt; print("Key=$k Value=$v"));
  </code></pre>
  
  <p>I tried:</p>
  
  <ul>
  <li>on windows and it works</li>
  <li>on mac but doesn't work</li>
  </ul>
  
  <p>Is my user variable is not well defined? Is my code is bad? It's a bug?</p>