portage-ng --merge
>>> Emerging : portage://sys-apps/sandbox-2.51:run?{[]}
These are the packages that would be merged, in order:
Calculating dependencies... done!
└─step 1─┤ download portage://sys-apps/sandbox-2.51
│ └─ file ─┤ 443.19 Kb sandbox-2.51.tar.xz
└─step 2─┤ update portage://sys-apps/sandbox-2.51 (replaces pkg://sys-apps/sandbox-2.46)
│ └─ conf ─┤ USE = "nnp"
└─step 3─┤ run portage://sys-apps/sandbox-2.51
Total: 3 actions (1 download, 1 update, 1 run), grouped into 3 steps.
443.19 Kb to be downloaded.