bug#15392: xorg-server FTBFS

[Andreas Enge <andreas@enge.fr>]

I tried the following patch, setting some xkb-related options for configuring
xorg-server:

diff --git a/gnu/packages/xorg.scm b/gnu/packages/xorg.scm
index 9a0e3e2..096ad54 100644
--- a/gnu/packages/xorg.scm
+++ b/gnu/packages/xorg.scm
@@ -4279,10 +4279,23 @@ emulation to complete hardware acceleration for modern GPUs.")
         ("xf86dgaproto" ,xf86dgaproto)
         ("xf86driproto" ,xf86driproto)
         ("xf86vidmodeproto" ,xf86vidmodeproto)
-;;        ("xkbutils" ,xkbutils)
-;;        ("xkeyboard-config" ,xkeyboard-config)

+("setxkbmap" ,setxkbmap)
+("xkbcomp" ,xkbcomp)
+("xkbevd" ,xkbevd)
+("xkbutils" ,xkbutils)
+("xkeyboard-config" ,xkeyboard-config)
         ("xtrans" ,xtrans)
         ("zlib" ,zlib)))
+    (arguments
+     `(#:configure-flags
+       (list (string-append "--with-xkb-path="
+                            (assoc-ref %build-inputs "xkeyboard-config")
+                            "/share/X11/xkb")
+             (string-append "--with-xkb-output="
+                            "/tmp")
+             (string-append "--with-xkb-bin-directory="
+                            (assoc-ref %build-inputs "xkbcomp")
+                            "/bin"))))
     (home-page "http://www.x.org/wiki/")
     (synopsis "xorg implementation of the X Window System")
     (description "X.org provides an implementation of the X Window System")

The same error occurs.

Inspired by nixpkgs, I also tried the following patch to xkeyboard-config:

+    (arguments
+     `(#:configure-flags
+       (list (string-append "--with-xkb-base="
+                            (assoc-ref %outputs "out")
+                            "/etc/X11/xkb")
+             "--with-xkb-rules-symlink=xorg,xfree86")))

Always the same error.

Should nix not have the same problem?

Andreas