I am exiting the deploy (directly below).  An error/stacktrace isn't useful here since the `build` method just shells out to the `middleman build` process. That process exits with non-zero status if it has errors, and it will not output detailed error messages unless you call `middleman build --verbose`.

Here is a screenshot of what this looks like (as it exists now):

![screenshot](https://www.monosnap.com/image/Ms4xgbK9vbdfUoGVqs6j5E3FH.png)