The dependency is missing. Checked against grs-0.6-r1
This is likely fixed in version 0.8-r1 with <https://gitweb.gentoo.org/repo/gentoo.git/commit/?id=8d28d71f0ce5e2955769974c3a203fe1b69a8994>, seeing that `grsrun` and the `test-daemon.py` are the only two places with calls to cgclassify. The first is only installed with USE="server" which creates a RDEPEND on `dev-libs/libcgroup`, and the second is never installed nor run.
Agreed.