title: Cannot open include file: 'io.h': No such file or directory
body: <p>I was trying to compile a simple .pyx file using Cython.</p>
  
  <pre><code>print("hello")
  </code></pre>
  
  <p>Here's my setup.py:</p>
  
  <pre><code>from distutils.core import setup
  from Cython.Build import cythonize
  
  setup(
      ext_modules = cythonize("hello.pyx")
  )
  </code></pre>
  
  <p>Then I run the command.</p>
  
  <pre><code>python setup.py build_ext --inplace
  </code></pre>
  
  <p>The error is shown below. I've struggled on googling it but found nothing helpful.</p>
  
  <blockquote>
  <pre><code>    running build_ext
      building 'hello' extension
      C:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\BIN\cl.exe /c /nologo /Ox /W3 /GL /DNDEBUG /MD
  -IC:\Users\Jackie\AppData\Local\Continuum\Anaconda3\include -IC:\Users\Jackie\AppData\Local\Continuum\Anaconda3\include "-IC:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\INCLUDE"
  "-IC:\Program Files (x86)\Windows Kits\10\include\wdf\ucrt"
  "-IC:\Program Files (x86)\Windows Kits\NETFXSDK\4.6\include\um"
  "-IC:\Program Files (x86)\Windows Kits\8.1\include\shared"
  "-IC:\Program Files (x86)\Windows Kits\8.1\include\um" "-IC:\Program
  Files (x86)\Windows Kits\8.1\include\winrt" /Tchello.c
  /Fobuild\temp.win32-3.5\Release\hello.obj  
      hello.c
      c:\users\jackie\appdata\local\continuum\anaconda3\include\pyconfig.h(68):
  fatal error C1083: Cannot open include file: 'io.h': No such file or
  directory  
      error: command 'C:\\Program Files (x86)\\Microsoft Visual Studio 14.0\\VC\\BIN\\cl.exe' failed with exit status 2
  </code></pre>
  </blockquote>
  
  <p>Can someone help me to resolve the error, please?</p>
  
  <p>I have Anaconda3 4.1.1, Python 3.5, and Visual Studio Express 2015 installed.</p>