And I just tried with Python 3.8 (default version of the image) and it still fails.

Poetry Enabled: Ignoring requested python packages, using repository poetry lock file!
Creating virtualenv debug in /root/.clearml/venvs-builds/3.8/task_repository/clearmldebug.git/.venv
Using virtualenv: /root/.clearml/venvs-builds/3.8/task_repository/clearmldebug.git/.venv
2023-04-18 15:03:52
Installing dependencies from lock file
Finding the necessary packages for the current system
Package operations: 6 installs, 0 updates, 0 removals
failed installing poetry requirements: Command '['poetry', 'install', '-n', '-v']' returned non-zero exit status 1.