title: CondaVerificationError: || ClobberError: Create a new conda environment with Python 2.7.x or 3.7.x
body: <p>While Creating a new conda environment with Python 2.7.x or 3.7.x using 
  <code>conda create -n gl-env python=2.7 anaconda=4.0.0</code> I get the following errors</p>
  
  <p>Preparing transaction: done
  Verifying transaction: failed</p>
  
  <pre><code>CondaVerificationError: The package for bokeh located at C:\Users\kokul\Miniconda3\pkgs\bokeh-0.11.1-py27_0
  appears to be corrupted. The path 'Scripts/bokeh-script.py-server'
  specified in the package manifest cannot be found.
  
  ClobberError: This transaction has incompatible packages due to a shared path.
    packages: defaults::notebook-4.1.0-py27_2, defaults::qtconsole-4.2.0-py27_1
    path: 'menu/jupyter.ico'
  </code></pre>
  
  <p>How to solve it?</p>