Issue Using Poetry in Non-package mode

I have been trying to use this to deploy sphinx pages automatically. The issue seems to involve loading requirements from my pyproject.toml function, which was mostly generated using Poetry. For my use case I didn't want to run Poetry in package mode, as I didn't see the value in having the code available from Pypi. This, however, seems to make poetry fail to build the package (as it should, I just don't think this should be invoked), and I can't figure out why this issue is occurring or how to avoid it. I tried messing with some optional arguments, but they didn't seem to help.

I have included a link to my testing repo below.
https://github.com/rhit-mierowir/TestingGithub/blob/main/.github/workflows/sphinx-to-GHPages.yml

I think the error is happening here, and I am not sure what to do about it.

This is the error message I get:

...

Is there a way to compile sphinx in a non-package mode?

Start with .github/workflows/sphinx-to-GHPages.yml in the linked testing repository and the pyproject.toml dependency-loading path mentioned in the report. Reproduce the failure from the workflow’s Sphinx and Poetry setup and determine whether non-package mode is supported. Done means the workflow builds and publishes the Sphinx pages without attempting an unwanted package build.