Add version attribute where maintainers |= nckx

This will probably be mandatory soon, and is a step in the right
direction. Removes the deprecated meta.version, and move some meta
sections to the end of the file where I should have put them in
the first place.

pkgs/tools/package-management/packagekit/default.nix

@@ -1,8 +1,8 @@
 { stdenv, fetchurl, intltool, glib, pkgconfig, polkit, python, sqlite }:
 
-let version = "1.0.8"; in
-stdenv.mkDerivation {
+stdenv.mkDerivation rec {
   name = "packagekit-${version}";
+  version = "1.0.8";
 
   src = fetchurl {
     sha256 = "1vaxn4kwdwx6p03n88k4pnbd2l6lb0cbxpcs88kjack1jml17c3l";
@@ -53,7 +53,6 @@ stdenv.mkDerivation {
   '';
 
   meta = with stdenv.lib; {
-    inherit version;
     description = "System to facilitate installing and updating packages";
     longDescription = ''
       PackageKit is a system designed to make installing and updating software