qemu build failure

[Greg Troxel <gdt%lexort.com@localhost>]

On:
  netbsd-10 amd64 from about a week ago
    x sets installed, so pkgsrc using native
  pkgsrc-current from about 36h ago, but with qemu from an hour ago
  everthing else up to date (pkg_rr)


building qemu fails:

  [5721/6717] Generating pc-bios/edk2-i386-vars.fd with a custom command (wrapped by meson to capture output)
  [5722/6717] Generating pc-bios/keymaps/ar with a custom command
  FAILED: pc-bios/keymaps/ar 
  /usr/pkg/bin/qemu-keymap -f pc-bios/keymaps/ar -l ar
  xkbcommon: ERROR: failed to add default include path /usr/X11R7/share/X11/xkb
  [5723/6717] Generating pc-bios/edk2-x86_64-code.fd with a custom command (wrapped by meson to capture output)
  [5724/6717] Generating pc-bios/edk2-x86_64-secure-code.fd with a custom command (wrapped by meson to capture output)
  ninja: build stopped: subcommand failed.
  *** Error code 1

I dimly remember seeing this before, but I do not remember the outcome.