portage-ng --merge
>>> Emerging : portage://sys-apps/shadow-4.20.2:run?{[]}
These are the packages that would be merged, in order:
Calculating dependencies... done!
└─step 1─┤ download portage://sys-apps/shadow-4.20.2
│ └─ file ─┤ 2.18 Mb shadow-4.20.2.tar.xz
└─step 2─┤ update portage://sys-apps/shadow-4.20.2 (replaces pkg://sys-apps/shadow-4.19.3)
│ └─ conf ─┤ USE = "acl nls pam -audit -skey -su -test -verify-sig"
│ │ SLOT = "0/6"
└─step 3─┤ run portage://sys-apps/shadow-4.20.2
Total: 3 actions (1 download, 1 update, 1 run), grouped into 3 steps.
2.18 Mb to be downloaded.