title: pipenv shell fails to create virtual environment
body: <p>I am trying to run a Django project using <code>pipenv shell</code>. But when I enter the command <code>pipenv shell</code>, it fails.</p>
  
  <pre><code>❯ pipenv shell
  Creating a virtualenv for this project…
  Pipfile: /Users/juyeong/Desktop/django_workspace/Pipfile
  Using /usr/local/bin/python3 (3.7.3) to create virtualenv…
  ⠸ Creating virtual environment...Already using interpreter /usr/local/bin/python3
  Using base prefix '/Library/Frameworks/Python.framework/Versions/3.7'
  Running virtualenv with interpreter /usr/local/bin/python3
  
  ✘ Failed creating virtual environment
  [pipenv.exceptions.VirtualenvCreationException]:   File "/usr/local/lib/python3.7/site-packages/pipenv/cli/command.py", line 390, in shell
  [pipenv.exceptions.VirtualenvCreationException]:       pypi_mirror=state.pypi_mirror,
  [pipenv.exceptions.VirtualenvCreationException]:   File "/usr/local/lib/python3.7/site-packages/pipenv/core.py", line 2156, in do_shell
  [pipenv.exceptions.VirtualenvCreationException]:       three=three, python=python, validate=False, pypi_mirror=pypi_mirror,
  [pipenv.exceptions.VirtualenvCreationException]:   File "/usr/local/lib/python3.7/site-packages/pipenv/core.py", line 574, in ensure_project
  [pipenv.exceptions.VirtualenvCreationException]:       pypi_mirror=pypi_mirror,
  [pipenv.exceptions.VirtualenvCreationException]:   File "/usr/local/lib/python3.7/site-packages/pipenv/core.py", line 506, in ensure_virtualenv
  [pipenv.exceptions.VirtualenvCreationException]:       python=python, site_packages=site_packages, pypi_mirror=pypi_mirror
  [pipenv.exceptions.VirtualenvCreationException]:   File "/usr/local/lib/python3.7/site-packages/pipenv/core.py", line 935, in do_create_virtualenv
  [pipenv.exceptions.VirtualenvCreationException]:       extra=[crayons.blue("{0}".format(c.err)),]
  [pipenv.exceptions.VirtualenvCreationException]: Traceback (most recent call last):
    File "/usr/local/lib/python3.7/site-packages/virtualenv.py", line 417, in copyfile
      os.symlink(os.path.realpath(src), dest)
  FileExistsError: [Errno 17] File exists: '/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/config-3.7m-darwin' -&gt; '/Users/juyeong/.local/share/virtualenvs/django_workspace-CfQ2tbWB/lib/python3.7/config-3.7m-darwin'
  
  During handling of the above exception, another exception occurred:
  
  Traceback (most recent call last):
    File "/usr/local/lib/python3.7/site-packages/virtualenv.py", line 2611, in &lt;module&gt;
      main()
    File "/usr/local/lib/python3.7/site-packages/virtualenv.py", line 862, in main
      symlink=options.symlink,
    File "/usr/local/lib/python3.7/site-packages/virtualenv.py", line 1137, in create_environment
      install_python(home_dir, lib_dir, inc_dir, bin_dir, site_packages=site_packages, clear=clear, symlink=symlink)
    File "/usr/local/lib/python3.7/site-packages/virtualenv.py", line 1421, in install_python
      copy_required_files(stdlib_dir, lib_dir, symlink)
    File "/usr/local/lib/python3.7/site-packages/virtualenv.py", line 1331, in copy_required_files
      copyfile(join(src_dir, fn), join(lib_dir, fn), symlink)
    File "/usr/local/lib/python3.7/site-packages/virtualenv.py", line 420, in copyfile
      copy_file_or_folder(src, dest, symlink)
    File "/usr/local/lib/python3.7/site-packages/virtualenv.py", line 398, in copy_file_or_folder
      shutil.copytree(src, dest, symlink)
    File "/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/shutil.py", line 321, in copytree
      os.makedirs(dst)
    File "/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/os.py", line 221, in makedirs
      mkdir(name, mode)
  FileExistsError: [Errno 17] File exists: '/Users/juyeong/.local/share/virtualenvs/django_workspace-CfQ2tbWB/lib/python3.7/config-3.7m-darwin'
  
  Failed to create virtual environment.
  </code></pre>
  
  <p>Everything was okay when I was using <code>pipenv shell</code> in macOS <code>Mojave</code>, now I'm using <code>Catalina version 10.15.1</code> and it's not working at all. I've tried upgrading pip, removing and reinstalling pipenv but same thing happens. :'(</p>
  
  <p>Can anyone help me solve this problem?</p>
  
  <p>P.S. I want to use virtual environment with <code>pipenv shell</code>, not with <code>python -m venv</code></p>