cronbase ebuild calls enewgroup, which calls groupadd groupadd is provided by sys-apps/shadow most likely to be seen during a catalyst build, but a fresh system without sys-apps/shadow would see it as well. Best solution is to add DEPEND="sys-apps/shadow" to cronbase ebuild. Reproducible: Always
such changes only happen when the release team asks for it
*** Bug 223277 has been marked as a duplicate of this bug. ***