portage-ng --merge
>>> Emerging : portage://media-libs/libsidplayfp-3.0.0:run?{[]}
These are the packages that would be merged, in order:
Calculating dependencies... done!
└─step 1─┤ download portage://media-libs/libresidfp-1.1.1
│ └─ file ─┤ 526.20 Kb libresidfp-1.1.1.tar.gz
│ download portage://media-libs/libsidplayfp-3.0.0
│ └─ file ─┤ 688.30 Kb libsidplayfp-3.0.0.tar.gz
└─step 2─┤ install portage://media-libs/libresidfp-1.1.1
│ └─ conf ─┤ USE = "-test"
│ │ SLOT = "0/1.1"
└─step 3─┤ run portage://media-libs/libresidfp-1.1.1
└─step 4─┤ install portage://media-libs/libsidplayfp-3.0.0
│ └─ conf ─┤ USE = "-test -usb"
│ │ SLOT = "0/7"
└─step 5─┤ run portage://media-libs/libsidplayfp-3.0.0
Total: 6 actions (2 downloads, 2 installs, 2 runs), grouped into 5 steps.
1.19 Mb to be downloaded.