Poetry has been the one I've settled on as well. It "Just Works™" for everything I've used it for thus far, and it's even been easy to convert older methods I've tried to the Poetry way of doing things.
I do see that in their repo[1] they use a non standard way to build the package. They use Bazel, but that's Google for you. They never do things everyone else is doing. I'm not sure why this is Python problem rather than package problem.
They have tons of open issues around building: [2]
Reading the comment thread it's not immediately clear what the answer is - it seems implied that the proper way is using Poetry, is that the case?