title: Can't create new ipykernel kernel in pipenv on WSL
body: <p>I'm trying to run the command <code>python -m ipykernel install --user --name=testenv</code> inside a pipenv virtual environment so I can have a Jupyter kernel with the correct modules available.</p>
  <p>When I run this command, it errors, with the bottom of the stack trace looking like:</p>
  <pre><code>File &quot;/usr/lib/python3.6/shutil.py&quot;, line 365, in copytree
      raise Error(errors)
  shutil.Error: [('/mnt/c/users/username/.local/share/virtualenvs/projectname-xHas313j/lib/python3.6/site-packages/ipykernel/resources', '/tmp/tmpsnos7rgk_kernels/python3', &quot;[Errno 22] Invalid argument: '/tmp/tmpsnos7rgk_kernels/python3'&quot;)]
  </code></pre>
  <p>I can navigate to the directory <code>/tmp/tmpsnos7rgk_kernels</code> and can see the <code>python3</code> file.</p>
  <p>One vague <em>possible</em> source of an issue I can think of is that the first argument directory, where I'm assuming the kernel should end up, is on the Windows filesystem whereas the <code>/tmp</code> directory is in the WSL filesystem.</p>
  <p>I'm using Python 3.6.7 in WSL1.</p>