portage-ng --merge
>>> Emerging : portage://sci-physics/heppdt-3.04.01-r2:run?{[]}
These are the packages that would be merged, in order:
Calculating dependencies... done!
└─step 1─┤ download portage://sci-physics/heppdt-3.04.01-r2
│ └─ file ─┤ 1.77 Mb HepPDT-3.04.01.tar.gz
└─step 2─┤ install portage://sci-physics/heppdt-3.04.01-r2
│ └─ conf ─┤ USE = "-doc -examples -static-libs"
└─step 3─┤ run portage://sci-physics/heppdt-3.04.01-r2
Total: 3 actions (1 download, 1 install, 1 run), grouped into 3 steps.
1.77 Mb to be downloaded.