title: apt-get install in azure-pipelines fails randomly
body: <p>In my <code>azure-pipelines.yaml</code> I have one script that install some dependencies.</p>
  <pre class="lang-yaml prettyprint-override"><code>- script: |
      apt-get update
      apt-get install libgtk2.0-0
      apt-get install libgtk-3-0
    displayName: 'Dep install'
  </code></pre>
  <p>Sometimes it goes ok, sometimes it throw an error.</p>
  <pre><code>apt-get: command not found
  </code></pre>
  <p>Normally when I run again it goes ok. Did someone already get through that?</p>