Packages in sub-directory src/ or equivalent of setuptools find_packages(where="src")

[k4ml]

If I put my package dir under src/ sub-directory, not in directory next to pyproject.toml, how do I tell pyflow about that? In poetry, it's defined as:-

[tool.poetry]
...
packages = [
    { include = "testflow", from = "src" },
]

[David-OConnor]

Currently, there isn't a way to do this.