We currently still depend upon a now outdated Poetry version of 1.1.15: employed to transition us from our prior Py2.7 to our current Py3.9. But now that we are well under-way with our Py3.9 dependency update we can move to updating our Poetry to re-enable our Tumbleweed install build capability: there exists an incompatibility with installing (but not using) Poetry that break new installer builds that should be addressed by this issue.

A significant element in addressing this issue is that there is no update path in Poetry from 1.1.15 to 1.2.x:
https://python-poetry.org/blog/announcing-poetry-1.1.15/#compatibility-between-poetry-11-and-12
https://python-poetry.org/docs/#installation
I.e. we will likely have to remove and re-install rather than just do a poetry self update.

Poetry 1.1 series releases are not able to update in-place to 1.2 or newer series releases. To migrate to newer releases, uninstall using your original install method, and then reinstall using the methods above.