[13:38] Does anyone else have trouble getting `preseed/early_command` and `preseed/late_command` to work in Ubiquity? Could I be doing better than just putting all my arbitrary shell tweaks into a `ubiquity/success_command`? [13:40] One thing I have noticed is that a failure in the `ubiquity/success_command` is never communicated to the caller (which I'm assume is the Ubiquity UI).