Gentoo's Bugzilla –
Attachment 391658 Details for
Bug 532530sys-apps/systemd-218 USE=-terminal should depend on x11-libs/libxkbcommon - .../work/systemd-218/src/locale/localed.c:1039:53: error: ‘XKB_KEYMAP_COMPILE_NO_FLAGS’ undeclared (first use in this function)