portage-ng --merge
>>> Emerging : portage://llvm-core/llvm-common-19.1.7:run?{[]}
These are the packages that would be merged, in order:
Calculating dependencies... done!
└─step 1─┤ download portage://llvm-core/llvm-common-19.1.7
│ └─ file ─┤ 134.71 Mb llvm-project-19.1.7.src.tar.xz
└─step 2─┤ downgrade portage://llvm-core/llvm-common-19.1.7 (replaces pkg://llvm-core/llvm-common-22.1.1)
│ └─ conf ─┤ USE = "-emacs -verify-sig"
└─step 3─┤ run portage://llvm-core/llvm-common-19.1.7
Total: 3 actions (1 download, 1 downgrade, 1 run), grouped into 3 steps.
134.71 Mb to be downloaded.