xorg{xcb-util-keysyms,libxkbfile}: split the dev output

pkgs/servers/x11/xorg/overrides.nix

@@ -214,6 +214,10 @@ in
   libXpresent = attrs: attrs
     // { buildInputs = with xorg; attrs.buildInputs ++ [ libXext libXfixes libXrandr ]; };
 
+  libxkbfile = attrs: attrs // {
+    outputs = [ "dev" "out" ]; # mainly to avoid propagation
+  };
+
   setxkbmap = attrs: attrs // {
     postInstall =
       ''
@@ -238,6 +242,10 @@ in
     meta.maintainers = [ stdenv.lib.maintainers.lovek323 ];
   };
 
+  xcbutilkeysyms = attrs: attrs // {
+    outputs = [ "dev" "out" ]; # mainly to get rid of propagating others
+  };
+
   xf86inputevdev = attrs: attrs // {
     preBuild = "sed -e '/motion_history_proc/d; /history_size/d;' -i src/*.c";
     installFlags = "sdkdir=\${out}/include/xorg";