portage-ng --merge
>>> Emerging : portage://sci-mathematics/gfan-0.6.2-r7:run?{[]}
These are the packages that would be merged, in order:
Calculating dependencies... done!
└─step 1─┤ download portage://sci-libs/cddlib-094n
│ └─ file ─┤ 1.32 Mb cddlib-0.94n.tar.gz
│ download portage://sci-mathematics/gfan-0.6.2-r7
│ └─ file ─┤ 1.26 Mb gfan0.6.2.tar.gz
└─step 2─┤ install portage://sci-libs/cddlib-094n
│ └─ conf ─┤ USE = "-doc -examples -static-libs -tools"
└─step 3─┤ run portage://sci-libs/cddlib-094n
└─step 4─┤ install portage://sci-mathematics/gfan-0.6.2-r7
│ └─ conf ─┤ USE = "-doc"
└─step 5─┤ run portage://sci-mathematics/gfan-0.6.2-r7
Total: 6 actions (2 downloads, 2 installs, 2 runs), grouped into 5 steps.
2.58 Mb to be downloaded.