nm, think I've found it, --build_patterns

Yes,

--build_patterns

will do it. Don't forget to also set

[tailor]
build_file_name = "PANTSBUILD"

in your

pants.toml

so that using

pants tailor

will generate build files using whatever naming convention you adopt

You may also want to set

--pants-ignore

and

--build-ignore

so Pants does not try to look into Bazel's directories. https://github.com/pantsbuild/example-workspace-execution/blob/38ffd89d4a141382115063d0be2e56ec10795723/pants.toml#L8-L15