title: failed to find interpreter for Builtin discover of python_spec
body: <h1>GOAL:</h1>
  <p>I am trying to create a <strong>new virtual environment</strong> with a <em>specific</em> python version.</p>
  <h1>ISSUE</h1>
  <p>When I type:</p>
  <pre><code>python3 -m virtualenv --python=&quot;D:\Python_Versions\python.exe&quot; new_virtualenv
  </code></pre>
  <p>I get:</p>
  <blockquote>
  <p>RuntimeError: failed to find interpreter for Builtin discover of python_spec='D:\Python_Versions\python.exe'</p>
  </blockquote>
  <h1>WHAT I HAVE DONE:</h1>
  <ol>
  <li><strong>Install Ubuntu Bash for Windows</strong>:</li>
  </ol>
  <p>Open Windows Command Prompt</p>
  <pre><code>wsl --install
  </code></pre>
  <p>Source:
  <a href="https://docs.microsoft.com/en-us/windows/wsl/install" rel="nofollow noreferrer">https://docs.microsoft.com/en-us/windows/wsl/install</a></p>
  <ol start="2">
  <li><strong>Install Pip</strong></li>
  </ol>
  <p>Open Windows command prompt:</p>
  <pre><code>bash
  </code></pre>
  <p>Then</p>
  <pre><code> sudo apt-get install python-pip
  </code></pre>
  <ol start="3">
  <li><strong>Install Virtualenv</strong></li>
  </ol>
  <p>Type</p>
  <pre><code>pip install virtualenv
  </code></pre>
  <ol start="4">
  <li><strong>Download python version</strong> (Here 3.6)</li>
  </ol>
  <p>Go to: <a href="https://www.python.org/downloads/release/python-360/" rel="nofollow noreferrer">https://www.python.org/downloads/release/python-360/</a></p>
  <p>Download: Windows x86-64 executable installer</p>
  <p>Install into folder of your choice, i.e. <code>D:\Python_Versions\</code></p>
  <ol start="5">
  <li><strong>Attempt to create virtual environment with specific python version</strong>  (Failed)</li>
  </ol>
  <p>In the command prompt, go to your project folder (&quot;cd ...&quot;) and type:</p>
  <pre><code>python3 -m virtualenv --python=&quot;D:\Python_Versions\python.exe&quot; new_virtualenv
  </code></pre>
  <p>Source: <a href="https://stackoverflow.com/questions/1534210/use-different-python-version-with-virtualenv">Use different Python version with virtualenv</a></p>