Add xvfb-run, a wrapper script for Xvfb.

pkgs/tools/misc/xvfb-run/default.nix

@@ -0,0 +1,21 @@
+{ stdenv, fetchurl, makeWrapper, xkbcomp, xorgserver, getopt, xkeyboard_config}:
+let
+  xvfb_run = fetchurl {
+    url = https://projects.archlinux.org/svntogit/packages.git/plain/trunk/xvfb-run?h=packages/xorg-server;
+    sha256 = "1f9mrhqy0l72i3674n98bqlq9a10h0rh9qfjiwvivz3hjhq5c0gz";
+  };
+in
+stdenv.mkDerivation {
+  name = "xvfb-run";
+  buildInputs = [makeWrapper];
+  buildCommand = ''
+    mkdir -p $out/bin
+    cp ${xvfb_run} $out/bin/xvfb-run
+    sed -i 's|XVFBARGS="|XVFBARGS="-xkbdir ${xkeyboard_config}/etc/X11/xkb |' $out/bin/xvfb-run
+
+    chmod a+x $out/bin/xvfb-run
+    wrapProgram $out/bin/xvfb-run \
+      --set XKB_BINDIR "${xkbcomp}/bin" \
+      --prefix PATH : ${getopt}/bin:${xorgserver}/bin
+  '';
+}

pkgs/top-level/all-packages.nix

@@ -1738,6 +1738,8 @@ let
 
   xtreemfs = callPackage ../tools/filesystems/xtreemfs {};
 
+  xvfb_run = callPackage ../tools/misc/xvfb-run {};
+
   youtubeDL = callPackage ../tools/misc/youtube-dl { };
 
   zbar = callPackage ../tools/graphics/zbar {};