Package in portage tree is 0.27 (Mar 26, 2017). Current one is 0.30 (Apr 4, 2018). In the meantime, ncmpc switched from autotools to meson+ninja. Reproducible: Always
I've made an ebuild and have submitted it to github mirror as a PR - https://github.com/gentoo/gentoo/pull/9433
Adressed here: https://gitweb.gentoo.org/repo/gentoo.git/commit/?id=ab6d53a2766bf6c79014095ac9dd9c57db068881