portage-ng --merge
>>> Emerging : portage://dev-util/ctags-6.2.1:run?{[]}
These are the packages that would be merged, in order:
Calculating dependencies... done!
└─step 1─┤ download portage://app-eselect/eselect-ctags-1.20
│ └─ file ─┤ 8.96 Kb eselect-emacs-1.20.tar.xz
│ download portage://dev-libs/jansson-2.15.1
│ └─ file ─┤ 477.32 Kb jansson-2.15.1.tar.bz2
│ download portage://dev-util/ctags-6.2.1
│ └─ file ─┤ 2.98 Mb universal-ctags-6.2.1.tar.gz
└─step 2─┤ install portage://dev-libs/jansson-2.15.1
│ └─ conf ─┤ USE = "-doc -static-libs"
│ │ SLOT = "0/4"
│ install portage://app-eselect/eselect-ctags-1.20
└─step 3─┤ run portage://dev-libs/jansson-2.15.1
└─step 4─┤ install portage://dev-util/ctags-6.2.1
│ └─ conf ─┤ USE = "json* pcre seccomp -test -xml -yaml"
└─step 5─┤ run portage://dev-util/ctags-6.2.1
Total: 8 actions (3 downloads, 3 installs, 2 runs), grouped into 5 steps.
3.45 Mb to be downloaded.