portage-ng --merge
>>> Emerging : portage://games-emulation/libretro-dosbox-0.0.1_pre20180723:run?{[]}
These are the packages that would be merged, in order:
Calculating dependencies... done!
└─step 1─┤ download portage://games-emulation/libretro-dosbox-0.0.1_pre20180723
│ └─ file ─┤ 1.13 Mb libretro-dosbox-0.0.1_pre20180723.tar.gz
└─step 2─┤ install portage://games-emulation/libretro-dosbox-0.0.1_pre20180723
│ └─ conf ─┤ USE = "-debug"
└─step 3─┤ run portage://games-emulation/libretro-dosbox-0.0.1_pre20180723
Total: 3 actions (1 download, 1 install, 1 run), grouped into 3 steps.
1.13 Mb to be downloaded.