You know what, though, maybe that whole section was a bad idea. I was thinking someone could customize the built-in override, like

```coffeescript
config =
  overrides:
    production:
      sourceMaps: true
```

and the rest of the settings would just merge with the defaults, so `optimize` would still be turned on, etc. 

Maybe that's more confusing than just replacing the entire object if they decide to customize though. What do you think?