This avoids this error during the build:

  touch: cannot touch 'config/chroot_local-includes/live/overlay': No such file or directory
  touch: cannot touch 'config/chroot_local-includes/lib/live/mount/persistence': No such file or directory
  touch: cannot touch 'config/chroot_local-includes/etc/apparmor.d/disable/usr.bin.man': No such file or directory

Filtering out such errors when looking at a build log takes cycles.