title: Boost for android error with NDK
body: <p>I'm trying to add support for BOOST in my android application which contains the c++ library. I'm following these instructions: </p>
  
  <p><a href="https://github.com/MysticTreeGames/Boost-for-Android" rel="nofollow">https://github.com/MysticTreeGames/Boost-for-Android</a></p>
  
  <p>However, I'm getting the error when running the command: </p>
  
  <pre><code>build-android.bat C:/Users/user/.android-sdk/ndk-bundle
  </code></pre>
  
  <p>Error:</p>
  
  <pre><code>Building boost version: 1.53.0
  ERROR: %* is not a valid NDK root
  </code></pre>
  
  <p>What could be causing this? Is the root incorrect? I've been struggling for hours on this ...</p>