title: How to fix `ResolvePackageNotFound` error when creating Conda environment?
body: <p>When I run the following command: 
  <code>conda env create -f virtual_platform_mac.yml</code></p>
  
  <p>I get this error</p>
  
  <pre><code>Collecting package metadata (repodata.json): done
  Solving environment: failed
  
  ResolvePackageNotFound: 
    - pytables==3.4.2=np113py35_0
    - h5py==2.7.0=np113py35_0
    - anaconda==custom=py35_0
  </code></pre>
  
  <p><strong>How can I solve this?</strong></p>
  
  <p>I am working on Mac OS X.</p>