portage-ng --merge
>>> Emerging : portage://dev-debug/valgrind-3.27.0:run?{[]}
These are the packages that would be merged, in order:
Calculating dependencies... done!
└─step 1─┤ download portage://dev-debug/valgrind-3.27.0
│ └─ file ─┤ 16.49 Mb valgrind-3.27.0.tar.bz2
└─step 2─┤ install portage://dev-debug/valgrind-3.27.0
│ └─ conf ─┤ USE = "-mpi -verify-sig"
└─step 3─┤ run portage://dev-debug/valgrind-3.27.0
Total: 3 actions (1 download, 1 install, 1 run), grouped into 3 steps.
16.49 Mb to be downloaded.