After generating a fresh ninja file and executing ninja it will immediately regenerate itself. This is because Ninja does not know anything about the SCons* files on first run so assumes they are out of date and re-runs the generation command.

We should either populate .ninja_deps so it's aware it's been recently generated or teach the SCons Ninja builder how to determine it's out of date-ness so when ninja runs the generation command it will only determine there's no work to do.