portage-ng --merge
>>> Emerging : portage://dev-lang/nasm-2.16.03:run?{[]}
These are the packages that would be merged, in order:
Calculating dependencies... done!
└─step 1─┤ download portage://dev-lang/nasm-2.16.03
│ └─ file ─┤ 1008.19 Kb nasm-2.16.03.tar.xz
└─step 2─┤ downgrade portage://dev-lang/nasm-2.16.03 (replaces pkg://dev-lang/nasm-3.01)
│ └─ conf ─┤ USE = "-doc"
└─step 3─┤ run portage://dev-lang/nasm-2.16.03
Total: 3 actions (1 download, 1 downgrade, 1 run), grouped into 3 steps.
1008.19 Kb to be downloaded.