emerge -1 -av unzip

 * IMPORTANT: config file '/etc/portage/package.use' needs updating.
 * See the CONFIGURATION FILES and CONFIGURATION FILES UPDATE TOOLS
 * sections of the emerge man page to learn how to update config files.

These are the packages that would be merged, in order:

Calculating dependencies... done!
[ebuild  NS    ] dev-lang/python-2.7.18-r1:2.7::python-kit [3.7.16:3.7/3.7m::python-kit, 3.9.16:3.9::python-kit] USE="bluetooth gdbm ipv6%* ncurses optimize%* readline sqlite ssl (threads%*) (wide-unicode%*) xml (-berkdb) -build -examples -hardened -libressl% -tk -wininst (-libedit%) (-lto%) (-pgo%) (-test%)" 0 KiB
[ebuild  N     ] dev-libs/libnatspec-0.3.0::dev-kit  USE="python -doc" PYTHON_SINGLE_TARGET="python2_7" PYTHON_TARGETS="python2_7" 0 KiB
[ebuild   R    ] app-arch/unzip-6.0_p27::core-kit  USE="bzip2 natspec unicode" 25 KiB

Total: 3 packages (1 new, 1 in new slot, 1 reinstall), Size of downloads: 25 KiB

Would you like to merge these packages? [Yes/No]



We see unzip thought libnatspec requires python 2.7