title: cx_freeze error with matplotlib data
body: <p>I'm trying to freeze a Python program with cx_freeze, on a Debian 8 machine, but I run into this error message: </p>
  
  <pre><code>copying /usr/lib/python2.7/dist-packages/matplotlib/mpl-data -&gt; build/exe.linux-x86_64-2.7/mpl-data
  error: [Errno 2] No such file or directory: '/usr/lib/python2.7/dist-packages/matplotlib/mpl-data'
  </code></pre>
  
  <p>My <em>setup.py</em> file contains:</p>
  
  <pre><code>from cx_Freeze import setup, Executable
  
  buildOptions = {
      "excludes": ["PyQt5"]}
  # PyQt5 conflicts with PyQt4
  
  base = None
  
  executables = [
      Executable('test_fitfuns.py', base=base)
  ]
  
  setup(name='testfitfuns',
        version = '1.0',
        description = 'test fit functions',
        options = dict(build_exe = buildOptions),
        executables = executables)
  </code></pre>
  
  <p>I figured out that my <em>mpl-data</em> directory is in <code>"/usr/share/matplotlib/mpl-data"</code>, so I tried adding this line to <code>buildOptions</code>:</p>
  
  <pre><code>"include_files": [("/usr/share/matplotlib/mpl-data", "mpl-data")],
  </code></pre>
  
  <p>If I do this, my error becomes:</p>
  
  <pre><code>error: [Errno 21] Is a directory: 'build/exe.linux-x86_64-2.7/mpl-data'
  </code></pre>
  
  <p>What should I try next?</p>
  
  <p>This is my first attempt at using cx_freeze, so I apologize if this is a trivial question.</p>