Revert Merge x-updates into master due to mesa bloat

See #490 discussion.

This reverts commit 1278859d31, reversing
changes made to 0c020c98f9.

Conflicts:
	pkgs/desktops/xfce/core/xfce4-session.nix (take master)
	pkgs/lib/misc.nix (auto)

pkgs/development/compilers/vala/default.nix

@@ -1,24 +1,18 @@
-{ stdenv, fetchurl, yacc, flex, pkgconfig, glib, dbus, dbus_tools, libiconvOrEmpty }:
+{ stdenv, fetchurl, yacc, flex, pkgconfig, glib, libintlOrEmpty }:
 
 stdenv.mkDerivation rec {
-  p_name  = "vala";
-  ver_maj = "0.19";
-  ver_min = "0";
+
+  version = "0.17.2";
+  name = "vala-${version}";
 
   src = fetchurl {
-    url = "mirror://gnome/sources/${p_name}/${ver_maj}/${name}.tar.xz";
-    sha256 = "1vn524hcnaggz8zx49mvf7p4z1mscrlj2syg7jjhph8nak5wi0bp";
+    url = "mirror://gnome/sources/vala/0.17/${name}.tar.xz";
+    sha256 = "09i2s0dwmrk147ind2dx7nq845g12fp6fsjqrphhrr0dbi0zzgh3";
   };
-  name = "${p_name}-${ver_maj}.${ver_min}";
-
-  postPatch = "patchShebangs .";
 
   nativeBuildInputs = [ yacc flex pkgconfig ];
 
-  buildInputs = [ glib ] ++ libiconvOrEmpty
-    ++ stdenv.lib.optional doCheck [ dbus dbus_tools ];
-
-  doCheck = false; # problems when launching dbus tests
+  buildInputs = [ glib ] ++ libintlOrEmpty;
 
   meta = {
     description = "Compiler for the GObject type system";