Under Building Images you have the following
Skipping failed packages IGNORE_ERRORS=1 make <make options>
I have been trying to compile for days and always getting failed errors so did a make -h it would seem the ignore error switch has changed to:
Skipping failed packages make -i <make options>
Might be worth if this is only effecting Snapshots (which i am using currently) to add this in as a note or if its globally changed maybe adjust the page to reflect this.