portage-ng --merge
>>> Emerging : portage://dev-util/vulkan-tools-1.4.357.0:run?{[]}
These are the packages that would be merged, in order:
Calculating dependencies... done!
└─step 1─┤ download portage://dev-util/vulkan-headers-1.4.357.0
│ └─ file ─┤ 3.22 Mb vulkan-headers-1.4.357.0.tar.gz
│ download portage://dev-util/vulkan-tools-1.4.357.0
│ └─ file ─┤ 801.07 Kb vulkan-tools-1.4.357.0.tar.gz
└─step 2─┤ install portage://dev-util/vulkan-headers-1.4.357.0
│ └─ conf ─┤ USE = "-test"
└─step 3─┤ install portage://dev-util/vulkan-tools-1.4.357.0
│ └─ conf ─┤ USE = "X* -cube -test -wayland"
└─step 4─┤ run portage://dev-util/vulkan-tools-1.4.357.0
Total: 5 actions (2 downloads, 2 installs, 1 run), grouped into 4 steps.
4.00 Mb to be downloaded.