 ways.  Note that this
  will only take effect on a newly launched shell.</p>

<p>You can check if your environment is set up properly by
  running <code>opam switch</code> with no arguments.  It will emit a
  warning if your shell is not set up correctly, along with
  instructions on how to fix it.</p>
<pre class="command-line" data-user="rwo" data-host="lama" data-output="2-7">
  <code class="language-bash">
opam switch
#  switch                            compiler                    description
â†’ 