portage-ng --merge
>>> Emerging : portage://sys-devel/gettext-0.21.1:run?{[]}
These are the packages that would be merged, in order:
Calculating dependencies... done!
└─step 1─┤ download portage://sys-devel/gettext-0.21.1
│ └─ file ─┤ 9.59 Mb gettext-0.21.1.tar.xz
└─step 2─┤ downgrade portage://sys-devel/gettext-0.21.1 (replaces pkg://sys-devel/gettext-0.23.2)
│ └─ conf ─┤ USE = "acl git* ncurses nls openmp cxx -doc -emacs -java -static-libs -verify-sig"
└─step 3─┤ run portage://sys-devel/gettext-0.21.1
Total: 3 actions (1 download, 1 downgrade, 1 run), grouped into 3 steps.
9.59 Mb to be downloaded.