portage-ng --merge
>>> Emerging : portage://sci-geosciences/librttopo-1.1.0:run?{[]}
These are the packages that would be merged, in order:
Calculating dependencies... done!
└─step 1─┤ download portage://sci-geosciences/librttopo-1.1.0
│ └─ file ─┤ 294.02 Kb librttopo-1.1.0.tar.gz
│ download portage://sci-libs/geos-3.14.1
│ └─ file ─┤ 6.69 Mb geos-3.14.1.tar.bz2
└─step 2─┤ install portage://sci-libs/geos-3.14.1
│ └─ conf ─┤ USE = "-doc -test"
└─step 3─┤ run portage://sci-libs/geos-3.14.1
└─step 4─┤ install portage://sci-geosciences/librttopo-1.1.0
└─step 5─┤ run portage://sci-geosciences/librttopo-1.1.0
Total: 6 actions (2 downloads, 2 installs, 2 runs), grouped into 5 steps.
6.98 Mb to be downloaded.