sys-apps/toybox seems to have flakey behavior in build_pacakges. Either because the ebuild is missing some dependency, or its build is inherently flakey.

This is a performance hit to the build whenever it fails.

+hungte who recently added this to chromeos-factory-deps

Example failure: https://uberchromegw.corp.google.com/i/chromeos/builders/veyron_minnie-cheets%20paladin/builds/211/steps/BuildPackages/logs/stdio