sys-auth/pam_mount-0.47 depends on app-arch/lzma-utils for installation so it's DEPEND setting should include app-arch/lzma-utils As far as I know it's RDEPEND setting doesn't need app-arch/lzma-utils
lzma-utils is part of the system set so on an up-to-date system, you shouldn't notice this problem. *** This bug has been marked as a duplicate of bug 207193 ***