portage-ng --merge
>>> Emerging : portage://sci-physics/reduze-2.4-r1:run?{[]}
These are the packages that would be merged, in order:
Calculating dependencies... done!
└─step 1─┤ download portage://sci-libs/cln-1.3.7
│ └─ file ─┤ 1.28 Mb cln-1.3.7.tar.bz2
│ download portage://sci-mathematics/ginac-1.8.10
│ └─ file ─┤ 1.45 Mb ginac-1.8.10.tar.bz2
│ download portage://sci-physics/reduze-2.4-r1
│ └─ file ─┤ 656.04 Kb reduze-2.4.tar.gz
└─step 2─┤ install portage://sci-libs/cln-1.3.7
│ └─ conf ─┤ USE = "-doc -examples"
│ │ SLOT = "1"
└─step 3─┤ run portage://sci-libs/cln-1.3.7
└─step 4─┤ install portage://sci-mathematics/ginac-1.8.10
│ └─ conf ─┤ USE = "-doc -examples"
└─step 5─┤ run portage://sci-mathematics/ginac-1.8.10
└─step 6─┤ install portage://sci-physics/reduze-2.4-r1
│ └─ conf ─┤ USE = "-berkdb* -doc -examples -mpi"
└─step 7─┤ run portage://sci-physics/reduze-2.4-r1
Total: 9 actions (3 downloads, 3 installs, 3 runs), grouped into 7 steps.
3.36 Mb to be downloaded.