* Package:    acct-user/vboxguest-0-r3:0
 * Repository: gentoo
 * USE:        abi_x86_64 amd64 elibc_glibc kernel_linux
 * FEATURES:   network-sandbox preserve-libs sandbox userpriv usersandbox

>>> Install acct-user/vboxguest-0-r3 into /var/tmp/portage/acct-user/vboxguest-0-r3/image
>>> Completed installing acct-user/vboxguest-0-r3 into /var/tmp/portage/acct-user/vboxguest-0-r3/image

 * Final size of build directory:  4 KiB
 * Final size of installed tree:  20 KiB

 * User vboxguest already exists
 * Updating user vboxguest
 * usermod --comment 'user for virtualbox-guest-additions' --home /dev/null --shell /bin/sh --gid vboxguest --groups '' --expiredate '' vboxguest