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

Calculating dependencies ... done!
Dependency resolution took 1.64 s (backtrack: 0/20).

[ebuild  NS    ] app-text/docbook-xml-dtd-4.3-r2:4.3::gentoo [4.1.2-r7:4.1.2::gentoo, 4.2-r3:4.2::gentoo, 4.4-r3:4.4::gentoo, 4.5-r2:4.5::gentoo] 82 KiB
[ebuild  N     ] dev-util/wayland-scanner-1.26.0::gentoo  599 KiB
[ebuild  N     ] sys-libs/basu-0.2.1::gentoo  USE="-audit -caps" 234 KiB
[ebuild  N     ] dev-libs/wayland-1.26.0::gentoo  USE="-doc (-selinux) -test" 0 KiB
[ebuild  N     ] dev-libs/wayland-protocols-1.49::gentoo  USE="-test" 148 KiB
[ebuild  N     ] x11-libs/gdk-pixbuf-2.44.8:2::gentoo  USE="gif jpeg tiff -gtk-doc -introspection -test" 5897 KiB
[ebuild  N     ] gui-apps/mako-1.9.0::gentoo  USE="icons -elogind (-systemd) -verify-sig" 63 KiB

Total: 7 packages (6 new, 1 in new slot), Size of downloads: 7020 KiB