portage-ng --merge
>>> Emerging : portage://dev-libs/jemalloc-5.4.0-r2:run?{[]}
These are the packages that would be merged, in order:
Calculating dependencies... done!
└─step 1─┤ download portage://dev-libs/jemalloc-5.4.0-r2
│ └─ file ─┤ 892.39 Kb jemalloc-5.4.0.tar.bz2
└─step 2─┤ install portage://dev-libs/jemalloc-5.4.0-r2
│ └─ conf ─┤ USE = "stats -debug -lazy-lock -prof -xmalloc"
│ │ SLOT = "0/2"
└─step 3─┤ run portage://dev-libs/jemalloc-5.4.0-r2
Total: 3 actions (1 download, 1 install, 1 run), grouped into 3 steps.
892.39 Kb to be downloaded.