The build overlay still looks less rich than the runtime one: <img width="813" alt="screen shot 2017-10-30 at 22 07 12" src="https://user-images.githubusercontent.com/810438/32198125-b434c83e-bdbe-11e7-8cc3-8390b197376b.png"> It would be nice to actually parse this (if it matches known Babel and ESLint formats) and display a richer version with: * Error message and file information in a runtime stack frame-like view * Highlighted line that causes the issue There would need to be tests verifying we don't regress if message format updates.