how do I disable Pants from looking in a directory for BUILD files? (context: I don’t want Pants to see BUILD files with targets from an experimental backend unless that backend is enabled.) I tried to use a

!path/to/dir

pattern in

source.root_pattetrns

but Pants still tries to parse a BUILD file under that directory and errors when it sees a target there that is defined by the disabled backend.

`build_ignore`: https://www.pantsbuild.org/docs/reference-global#section-build-ignore

okay that worked, thanks