Looks like a misspelling in ebuild: RDEPEND=" !net-fs/mount-cifs !<net-fs/samba-3.6_rc1 sys-apps/keyutils ads? ( sys-libs/talloc virtual/krb5 ) caps? ( !caps-ng? ( sys-libs/libcap ) ) caps? ( caps-ng? ( sys-libs/libcap-ng ) ) creds? ( sys-apps/keyutils ) pam? ( virtual/pam ) " So, we require keyutils both when creds is set and when not.
not sure why this was assigned to base-system. it's a bug with cifs-utils, not keyutils. *** This bug has been marked as a duplicate of bug 600832 ***