title: CMake can't find python3
body: <p>In my CMake I have:</p>
  
  <pre><code>find_package(PythonInterp 3.6 REQUIRED)
  </code></pre>
  
  <p>This works fine when I execute cmake ., because I have python3.6 in /opt/local/bin. However, when CLion executes the same cmake, it is unable to find it. How can I make it aware?</p>
  
  <p>I tried adding /opt/local/bin to PATH and adding a python interpreter setting, but nether worked for that.</p>