<p>I'm using the basic Haskell Platform installation (install with</p>
<pre><code>$ sudo aptitude install haskell-platform</code></pre>
<p>).</p>
-<p>I'm also using the <code>MissingH</code> library (install with</p>
-<pre><code>$ cabal install MissingH</code></pre>
+<p>I'm also using the <code>MissingH</code> and <code>Parsec-number</code> libraries (install with</p>
+<pre><code>$ cabal install MissingH
+$ cabal install parsec-number</code></pre>
<p>)</p>
<p>Compile the code with</p>
<pre><code>ghc --make advent01.hs</code></pre>