acct-user/vuls-build-log.

>>> Extracting info
 * Package:    acct-user/vuls-0
 * Repository: pentoo
 * USE:        userland_GNU kernel_linux elibc_glibc arm64
 * FEATURES:   network-sandbox preserve-libs sandbox userpriv usersandbox
>>> Extracting acct-user/vuls-0
getent: invalid option -- 'M'
Try `getent --help' or `getent --usage' for more information.
 * Adding user '-M' to your system ...
 *  - Userid: next available
 *  - Shell: /sbin/nologin
 *  - Home: /dev/null
 * You must add group /var/lib/vuls to the system first
 * ERROR: acct-user/vuls-0::pentoo failed (preinst phase):
 *   /var/lib/vuls is not a valid GID
 *
 * Call stack:
 *     ebuild.sh, line 125:  Called pkg_preinst
 *   environment, line 978:  Called acct-user_pkg_preinst
 *   environment, line 361:  Called enewuser '-M' 'vuls' '-1' '-1' '/var/lib/vuls' 'vuls'
 *   environment, line 818:  Called die
 * The specific snippet of code:
 *                   die "${g} is not a valid GID";
 *
 * If you need support, post the output of `emerge --info '=acct-user/vuls-0::pentoo'`,
 * the complete build log and the output of `emerge -pqv '=acct-user/vuls-0::pentoo'`.
 * The complete build log is located at '/var/tmp/portage/acct-user/vuls-0/temp/build.log'.
 * The ebuild environment file is located at '/var/tmp/portage/acct-user/vuls-0/temp/environment'.
 * Working directory: '/var/tmp/portage/acct-user/vuls-0/homedir'
 * S: '/var/tmp/portage/acct-user/vuls-0/work/vuls-0'
!!! FAILED preinst: 1