In the meantime, the best workaround is probably to use a single BUILD file at the root of your project with

**

recursive globs. We don't generally recommend that per https://www.pantsbuild.org/docs/targets#target-generation, but it is totally feasible to do especially thanks to the

overrides

field added in 2.8 (If you haven't read that page in the past two months, I encourage re-reading it. It was rewritten with some conceptual changes in 2.8)