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/os-specific/linux/systemd/default.nix

@@ -3,9 +3,10 @@
 , glib, kbd, libxslt, coreutils, libgcrypt, sysvtools, docbook_xsl
 }:
 
+assert stdenv.gcc.libc or null != null;
+
 stdenv.mkDerivation rec {
-  version = "203";
-  name = "systemd-${version}";
+  name = "systemd-203";
 
   src = fetchurl {
     url = "http://www.freedesktop.org/software/systemd/${name}.tar.xz";
@@ -24,8 +25,8 @@ stdenv.mkDerivation rec {
       ./0009-Start-ctrl-alt-del.target-irreversibly.patch
     ] ++ stdenv.lib.optional stdenv.isArm ./libc-bug-accept4-arm.patch;
 
-  buildInputs = assert stdenv.gcc.libc or null != null; # assertion here, so it doesn't trigger on passthru.headers
-    [ pkgconfig intltool gperf libcap dbus.libs kmod xz pam acl
+  buildInputs =
+    [ pkgconfig intltool gperf libcap dbus kmod xz pam acl
       /* cryptsetup */ libuuid m4 glib libxslt libgcrypt docbook_xsl
     ];
 
@@ -124,19 +125,6 @@ stdenv.mkDerivation rec {
   # runtime; otherwise we can't and we need to reboot.
   passthru.interfaceVersion = 2;
 
-  passthru.headers = stdenv.mkDerivation {
-    name = "systemd-headers-${version}";
-    inherit src;
-
-    phases = [ "unpackPhase" "installPhase" ];
-
-    # some are needed by dbus.libs, which is needed for systemd :-)
-    installPhase = ''
-      mkdir -p "$out/include/systemd"
-      mv src/systemd/*.h "$out/include/systemd"
-    '';
-  };
-
   meta = {
     homepage = "http://www.freedesktop.org/wiki/Software/systemd";
     description = "A system and service manager for Linux";