title: Maven assembly plugin warning "The assembly descriptor contains a filesystem-root relative reference"
body: <p>Starting from some assembly plugin version maven builds issue the following warning:</p>
  
  <blockquote>
    <p>[WARNING] The assembly descriptor contains a filesystem-root relative
    reference,which is not cross platform compatible /</p>
  </blockquote>
  
  <p>Is there any recommended ready-to-use solution for this? Direct googling provided me with lot of trash and no real help. Re-check of Maven assembly plugin help did not provide answer for me, maybe someone else has better search skill and can help.</p>
  
  <p><strong>UPDATE</strong></p>
  
  <p>Yes, this is probably because of Linux-like <code>outputDirectory</code> but how should I rewrite this to be portable? Looked at assembly plugin documentation and not found any portability guide.</p>
  
  <pre><code>&lt;fileSets&gt;
      &lt;fileSet&gt;
          &lt;directory&gt;${basedir}/src/main/resources&lt;/directory&gt;
          &lt;outputDirectory&gt;/&lt;/outputDirectory&gt;
      &lt;/fileSet&gt;
  &lt;/fileSets&gt;
  </code></pre>