title: error when creating a pipenv virtual environment with python 3.7
body: <p>My OS is ubuntu 20.04 and my default python is 3.8.2. I'm trying to create a virtual environment with pipenv and python 3.7. The following error occurs when I run <code>pipenv install --python 3.7</code>:</p>
  <pre><code>Creating a virtualenv for this project…
  Using /usr/bin/python3.7m (3.7.0) to create virtualenv…
  ⠋RuntimeError: failed to query /usr/bin/python3.7m with code 1 err: 'Traceback (most recent call last):\n  File &quot;/usr/lib/python3/dist-packages/virtualenv/discovery/py_info.py&quot;, line 16, in &lt;module&gt;\n    from distutils.command.install import SCHEME_KEYS\nModuleNotFoundError: No module named \'distutils.command\'\n'
  Error while trying to remove the /home/yuhao/.local/share/virtualenvs/electrode-mimic-j_E-dTLW env: 
  No such file or directory
  
  Virtualenv location: 
  Warning: Your Pipfile requires python_version 3.7, but you are using None (/bin/python).
    $ pipenv check will surely fail.
  Creating a virtualenv for this project…
  Using /usr/bin/python3 (3.8.2) to create virtualenv…
  ⠙created virtual environment CPython3.8.2.final.0-64 in 162ms
    creator CPython3Posix(dest=/home/yuhao/.local/share/virtualenvs/electrode-mimic-j_E-dTLW, clear=False, global=False)
    seeder FromAppData(download=False, progress=latest, msgpack=latest, pytoml=latest, packaging=latest, setuptools=latest, contextlib2=latest, retrying=latest, pip=latest, pep517=latest, idna=latest, CacheControl=latest, appdirs=latest, requests=latest, pkg_resources=latest, webencodings=latest, distlib=latest, certifi=latest, distro=latest, ipaddr=latest, wheel=latest, six=latest, pyparsing=latest, urllib3=latest, chardet=latest, colorama=latest, lockfile=latest, html5lib=latest, via=copy, app_data_dir=/home/yuhao/.local/share/virtualenv/seed-app-data/v1.0.1.debian)
    activators BashActivator,CShellActivator,FishActivator,PowerShellActivator,PythonActivator,XonshActivator
  
  Virtualenv location: /home/yuhao/.local/share/virtualenvs/electrode-mimic-j_E-dTLW
  Pipfile.lock not found, creating…
  Locking [dev-packages] dependencies…
  ^C
  Aborted!
  </code></pre>
  <p>Why is this happening?</p>