title: Building Qt for WinRT using Visual Studio 2013
body: <p>I downloaded the Qt for Windows Runtime Technology Preview from this location:</p>
  
  <p><a href="http://download.qt-project.org/development_releases/qt/winrt-tp/" rel="nofollow">http://download.qt-project.org/development_releases/qt/winrt-tp/</a></p>
  
  <p>When I try to build it using the instructions mentioned <a href="http://blog.qt.digia.com/blog/2013/12/12/qt-for-windows-runtime-technology-preview-released/?utm_source=rssutm_medium=rssutm_campaign=qt-for-windows-runtime-technology-preview-released" rel="nofollow">here</a>, I eventually run into the following error:</p>
  
  <pre><code>        win_flex --noline --nounistd --outfile=Tokenizer.cpp ..\..\..\..\3rdparty\angle\src\compiler\preprocessor\Tokenizer.l
  'win_flex' is not recognized as an internal or external command, operable program or batch file.
  NMAKE : fatal error U1077: 'win_flex' : return code '0x1'
  Stop.
  NMAKE : fatal error U1077: '"C:\Program Files (x86)\Microsoft Visual Studio 12.0\VC\BIN\nmake.exe"' : return code '0x2'
  Stop.
  NMAKE : fatal error U1077: 'cd' : return code '0x2'
  Stop.
  NMAKE : fatal error U1077: 'cd' : return code '0x2'
  Stop.
  NMAKE : fatal error U1077: 'cd' : return code '0x2'
  Stop.
  NMAKE : fatal error U1077: 'cd' : return code '0x2'
  Stop.
  NMAKE : fatal error U1077: 'cd' : return code '0x2'
  Stop.
  </code></pre>
  
  <p>How do I fix this?</p>