Exception: `No module named 'virtualenv.activation.nushell'`

• I am on the latest Poetry version.
• I have searched the issues of this repo and believe that this is not a duplicate.
• If an exception occurs when executing a command, I executed it again in debug mode (-vvv option).

• OS version and name: python:3.9 Docker container (Debian GNU/Linux 11 (bullseye))
• Poetry version: 1.1.8
• Link of a Gist with the contents of your pyproject.toml file: https://gist.github.com/shahinism/c24445184019d5568dac4717dd7253a5

Issue

Hi,

Starting yesterday afternoon, on our Gitlab CI runners, poetry install and poetry run commands are failing with the following error:

  ModuleNotFoundError
  No module named 'virtualenv.activation.nushell'
  at <frozen importlib._bootstrap>:984 in _find_and_load_unlocked

I suspect this is related to yesterday’s release of the pypa/virtualenv#2170 release which added nutshell support.

However, the reason I report it here, is that I can’t reproduce it with normal virtualenv creation commands when this version of virtualenv is installed. I tried to resolve this issue by setting SHELL environment variable to bash (as expected to inform poetry about the desired shell), and failed. However, running poetry commands like:

bash -c poetry install
bash -c poetry run ...

Works with no problem. You can find a more detailed log output on this gist.

[garciparedes]

I had the same problem, but it was fixed simply updating poetry to the latest version with:

poetry self update

[linzwatt]

I was getting the same issue. Rolling back virtualenv to the previous version fixed this for me… pip install virtualenv==20.7.2