title: Could not locate clojure/math/numeric_tower__init.class or clojure/math/numeric_tower.clj on classpath
body: <p>On a fresh lein install, when I start the repl via <code>lein repl</code> and enter into the repl:</p>
  
  <p><code>(use 'clojure.math.numeric-tower)</code></p>
  
  <p>It throws an error:</p>
  
  <p><code>FileNotFoundException Could not locate clojure/math/numeric_tower__init.class or clojure/math/numeric_tower.clj on classpath.</code></p>
  
  <p>I'm new to Clojure so I don't really know how to fix this.</p>
  
  <p>Lein version: Leiningen 2.7.1 (lein -v)</p>
  
  <p>Clojure version: 1.8.0 ( (clojure-version) )</p>