sbcl&quot;

POFTHEDAY&gt; (which:which &quot;python3&quot;)
#P&quot;/usr/bin/python3&quot;

POFTHEDAY&gt; (which:which &quot;missing-binary&quot;)
NIL</code></pre><p>That is it. No more, no less. What do you think, when this library can be useful?</p>
<p>By the way, there are many other trivial (but useful) libraries. All of them are marked with a <a href="https://40ants.com/lisp-project-of-the-day/tags/trivial.html">trivial tag</a> on #pofthedday site.</p>

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