portage-ng --merge
>>> Emerging : portage://dev-debug/valgrind-3.26.0_p1:run?{[]}
These are the packages that would be merged, in order:
Calculating dependencies... done!
└─step 1─┤ download portage://dev-debug/valgrind-3.26.0_p1
│ └─ file ─┤ 7.90 Kb valgrind-3.26.0-patches-1.tar.xz
│ │ 16.39 Mb valgrind-3.26.0.tar.bz2
└─step 2─┤ install portage://dev-debug/valgrind-3.26.0_p1
│ └─ conf ─┤ USE = "-mpi -verify-sig"
└─step 3─┤ run portage://dev-debug/valgrind-3.26.0_p1
Total: 3 actions (1 download, 1 install, 1 run), grouped into 3 steps.
16.39 Mb to be downloaded.