title: How do you import Data.Heap?
body: <p>Sorry for such a dumb question. I'm trying to import <a href="https://hackage.haskell.org/package/heap-1.0.3/docs/Data-Heap.html#t:HeapT" rel="nofollow noreferrer">Data.Heap</a>, but I get this error message: </p>
  
  <pre><code>&gt; import Data.Heap
  
  &lt;no location info&gt;: error:
      Could not find module ‘Data.Heap’
      Perhaps you meant
        Data.Map (from containers-0.5.7.1@containers-0.5.7.1)
  </code></pre>
  
  <p>Haven't had trouble with other imports.</p>
  
  <p>Thanks.</p>