I have this simple modd.conf:

**/*.go
{
  prep: go build ./app
  daemon: ./app
}

It works amazing.

But sometimes if I change a .go file and it couldn't build (because there is an error in the code) and it exit with error the daemon is still up and running.

Is there a way to kill daemon when prep starts and to stop execution of the entire block if that prep (or others after it) fails?