portage-ng --merge
>>> Emerging : portage://sys-kernel/linux-headers-7.1:run?{[]}
These are the packages that would be merged, in order:
Calculating dependencies... done!
└─step 1─┤ download portage://sys-kernel/linux-headers-7.1
│ └─ file ─┤ 1.14 Kb gentoo-headers-7.1-1.tar.xz
│ │ 150.97 Mb linux-7.1.tar.xz
└─step 2─┤ update portage://sys-kernel/linux-headers-7.1 (replaces pkg://sys-kernel/linux-headers-6.19)
│ └─ conf ─┤ USE = "-headers-only"
└─step 3─┤ run portage://sys-kernel/linux-headers-7.1
Total: 3 actions (1 download, 1 update, 1 run), grouped into 3 steps.
150.97 Mb to be downloaded.