portage-ng --merge
>>> Emerging : portage://sci-electronics/ngspice-43:run?{[]}
These are the packages that would be merged, in order:
Calculating dependencies... done!
└─step 1─┤ download portage://sci-electronics/ngspice-43
│ └─ file ─┤ 9.80 Mb ngspice-43.tar.gz
└─step 2─┤ install portage://sci-electronics/ngspice-43
│ └─ conf ─┤ USE = "X* openmp readline klu shared -debug -deprecated -doc -examples -fftw -tcl -test"
└─step 3─┤ run portage://sci-electronics/ngspice-43
Total: 3 actions (1 download, 1 install, 1 run), grouped into 3 steps.
9.80 Mb to be downloaded.