portage-ng --merge
>>> Emerging : portage://app-arch/par2cmdline-1.1.1:run?{[]}
These are the packages that would be merged, in order:
Calculating dependencies... done!
└─step 1─┤ download portage://app-arch/par2cmdline-1.1.1
│ └─ file ─┤ 3.11 Mb par2cmdline-1.1.1.tar.bz2
└─step 2─┤ install portage://app-arch/par2cmdline-1.1.1
│ └─ conf ─┤ USE = "openmp"
└─step 3─┤ run portage://app-arch/par2cmdline-1.1.1
Total: 3 actions (1 download, 1 install, 1 run), grouped into 3 steps.
3.11 Mb to be downloaded.