portage-ng --merge
>>> Emerging : portage://sci-libs/gts-20121130:run?{[]}
These are the packages that would be merged, in order:
Calculating dependencies... done!
└─step 1─┤ download portage://sci-libs/gts-20121130
│ └─ file ─┤ 859.93 Kb gts-snapshot-121130.tar.gz
└─step 2─┤ install portage://sci-libs/gts-20121130
│ └─ conf ─┤ USE = "-doc -test"
└─step 3─┤ run portage://sci-libs/gts-20121130
Total: 3 actions (1 download, 1 install, 1 run), grouped into 3 steps.
859.93 Kb to be downloaded.