On building a new Gentoo system from bare metal, following the handbook, I found that sys-boot/systemd-boot needs a dependency on app-text/docbook-xml-dtd:4.5 That's likey to be present already on a full desktop system, but it wasn't on mine at the time I was installing a boot loader. Reproducible: Always
Created attachment 444780 [details] Full build log
commit 36c587c83bf80fac62e3503d6cbc1c1404b71ab2 Author: Mike Gilbert <floppym@gentoo.org> Date: Sat Sep 3 14:06:38 2016 -0400 sys-boot/systemd-boot: depend on app-text/docbook-xml-dtd:4.5 Bug: https://bugs.gentoo.org/592716 Package-Manager: portage-2.3.0_p24 sys-boot/systemd-boot/systemd-boot-231.ebuild | 1 + 1 file changed, 1 insertion(+)