For some reason, when doing a grunt build on my VM, it simply dies off in this way:
grunt build
... Running \"concurrent:dist\" (concurrent) task Killed
I ran into this today and was able to diagnose the problem by running grunt serve -v --force.
grunt serve -v --force
Turned out that I was missing a file I was importing in my main.scss, but this error message only appeared after adding the --force flag.
--force