title: Use environment variable in NuGet config?
body: <p>Is there a way to use an environment variable in <code>NuGet.Config</code> file?</p>
  <p>Currently I am constrained to using relative path, as follows:</p>
  <pre><code>&lt;configuration&gt;
    &lt;config&gt;       
      &lt;add key=&quot;repositoryPath&quot; value=&quot;..\..\teampackages&quot; /&gt;
    &lt;/config&gt;
  &lt;/configuration&gt;
  </code></pre>
  <p>But would be really handy to have an environment variable with absolute path instead.</p>