Fresh install broken in Py 3.8 docker

Maybe related to #553

> docker run -it --rm python:3.8.0b4-buster /bin/sh
# curl -sSL https://raw.githubusercontent.com/sdispater/poetry/master/get-poetry.py | python
Retrieving Poetry metadata

# Welcome to Poetry!

This will download and install the latest version of Poetry,
a dependency and package manager for Python.

It will add the `poetry` command to Poetry's bin directory, located at:

$HOME/.poetry/bin

This path will then be added to your `PATH` environment variable by
modifying the profile file located at:

$HOME/.profile

You can uninstall at any time with `poetry self:uninstall`,
or by executing this script with the --uninstall option,
and these changes will be reverted.

Installing version: 0.12.17
  - Downloading poetry-0.12.17-linux.tar.gz (8.37MB)

Poetry (0.12.17) is installed now. Great!

To get started you need Poetry's bin directory ($HOME/.poetry/bin) in your `PATH`
environment variable. Next time you log in this will be done
automatically.

To configure your current shell run `source $HOME/.poetry/env`

# $HOME/.poetry/bin/poetry
Traceback (most recent call last):
  File "/root/.poetry/bin/poetry", line 12, in <module>
    from poetry.console import main
  File "/root/.poetry/lib/poetry/console/__init__.py", line 1, in <module>
    from .application import Application
  File "/root/.poetry/lib/poetry/console/application.py", line 6, in <module>
    from cleo import Application as BaseApplication
ModuleNotFoundError: No module named 'cleo'
#

[sdispater]

The full 0.12.17 release (with bundled dependencies) does not support Python 3.8 since the dependencies for it have not been bundled.

For Python 3.8, you might want to install Poetry with pip or try the latest 1.0.0b2 version.

I will see if I can make a 0.12.18 release, or even update the archives of the 0.12.17 with support for Python 3.8.

I will keep you updated.

[deepio]

I think we can close this issue now. PR was accepted https://github.com/sdispater/poetry/pull/1437

Update: I still get the same error after the PR.