portage-ng --merge
>>> Emerging : portage://sci-libs/ginkgo-1.4.0-r3:run?{[]}
These are the packages that would be merged, in order:
Calculating dependencies... done!
└─step 1─┤ download portage://sci-libs/ginkgo-1.4.0-r3
│ └─ file ─┤ 2.45 Mb ginkgo-1.4.0.tar.gz
└─step 2─┤ install portage://sci-libs/ginkgo-1.4.0-r3
│ └─ conf ─┤ USE = "openmp -cuda -hwloc"
└─step 3─┤ run portage://sci-libs/ginkgo-1.4.0-r3
Total: 3 actions (1 download, 1 install, 1 run), grouped into 3 steps.
2.45 Mb to be downloaded.