portage-ng --merge
>>> Emerging : portage://media-libs/libwebm-1.0.0.32:run?{[]}
These are the packages that would be merged, in order:
Calculating dependencies... done!
└─step 1─┤ download portage://media-libs/libwebm-1.0.0.32
│ └─ file ─┤ 489.93 Kb libwebm-1.0.0.32.tar.gz
└─step 2─┤ install portage://media-libs/libwebm-1.0.0.32
│ └─ conf ─┤ SLOT = "0/1.0.0.32"
└─step 3─┤ run portage://media-libs/libwebm-1.0.0.32
Total: 3 actions (1 download, 1 install, 1 run), grouped into 3 steps.
489.93 Kb to be downloaded.