Mix releases: custom commands / command aliases?

I know that if I want to run an arbitrary task from a mix release, I can do something like ./bin/app eval App.Release.migrate(), or rpc if that’s appropriate.

But is it possible to create some sort of alias for these arguments? It’d be really nice to be able to ship ./bin/app db.migrate, and have it map to eval App.Release.migrate(). I know this is trivial, but it would be a pretty significant UX improvement.