Use the "simple format" defined here:
https://github.com/bazelbuild/continuous-integration/blob/69cf7ec23d984dcbb41fffe946e07ebf5ab7e0f1/buildkite/bazelci.py#L1453

This will unbreak the "Bazel / FlatBuffers"
pipeline on Bazel CI, see
https://buildkite.com/bazel/flatbuffers