portage-ng --merge
>>> Emerging : portage://dev-perl/Audio-FLAC-Header-2.400.0-r5:run?{[]}
These are the packages that would be merged, in order:
Calculating dependencies... done!
└─step 1─┤ download portage://dev-perl/Audio-FLAC-Header-2.400.0-r5
│ └─ file ─┤ 118.23 Kb Audio-FLAC-Header-2.4.tar.gz
│ download portage://media-libs/flac-1.5.0
│ └─ file ─┤ 1.03 Mb flac-1.5.0.tar.xz
└─step 2─┤ install portage://media-libs/flac-1.5.0
│ └─ conf ─┤ USE = "cxx -debug -ogg -static-libs"
│ │ CPU_FLAGS_X86 = "avx avx2"
│ │ SLOT = "0/11-14"
└─step 3─┤ run portage://media-libs/flac-1.5.0
└─step 4─┤ install portage://dev-perl/Audio-FLAC-Header-2.400.0-r5
│ └─ conf ─┤ USE = "-test"
│ │ PERL_FEATURES = "ithreads -quadmath"
└─step 5─┤ run portage://dev-perl/Audio-FLAC-Header-2.400.0-r5
Total: 6 actions (2 downloads, 2 installs, 2 runs), grouped into 5 steps.
1.14 Mb to be downloaded.