portage-ng --merge
>>> Emerging : portage://games-puzzle/nudoku-3.0.0:run?{[]}
These are the packages that would be merged, in order:
Calculating dependencies... done!
└─step 1─┤ download portage://games-puzzle/nudoku-3.0.0
│ └─ file ─┤ 30.84 Kb nudoku-3.0.0.tar.gz
└─step 2─┤ install portage://games-puzzle/nudoku-3.0.0
│ └─ conf ─┤ USE = "cairo*"
└─step 3─┤ run portage://games-puzzle/nudoku-3.0.0
Total: 3 actions (1 download, 1 install, 1 run), grouped into 3 steps.
30.84 Kb to be downloaded.