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/networking/hans/default.nix

@@ -1,8 +1,8 @@
 { stdenv, fetchFromGitHub, nettools }:
 
-let version = "0.4.4"; in
-stdenv.mkDerivation {
+stdenv.mkDerivation rec {
   name = "hans-${version}";
+  version = "0.4.4";
 
   src = fetchFromGitHub {
     sha256 = "1xskffmmdmg1whlrl5wpkv9z29vh0igrbmsz0b45s9v0761a7kis";
@@ -11,21 +11,6 @@ stdenv.mkDerivation {
     owner = "friedrich";
   };
 
-  meta = with stdenv.lib; {
-    inherit version;
-    description = "Tunnel IPv4 over ICMP";
-    longDescription = ''
-      Hans makes it possible to tunnel IPv4 through ICMP echo packets, so you
-      could call it a ping tunnel. This can be useful when you find yourself in
-      the situation that your Internet access is firewalled, but pings are
-      allowed.
-    '';
-    homepage = http://code.gerade.org/hans/;
-    license = licenses.gpl3Plus;
-    platforms = platforms.linux;
-    maintainers = with maintainers; [ nckx ];
-  };
-
   buildInputs = [ nettools ];
 
   postPatch = ''
@@ -37,4 +22,18 @@ stdenv.mkDerivation {
   installPhase = ''
     install -D -m0755 hans $out/bin/hans
   '';
+
+  meta = with stdenv.lib; {
+    description = "Tunnel IPv4 over ICMP";
+    longDescription = ''
+      Hans makes it possible to tunnel IPv4 through ICMP echo packets, so you
+      could call it a ping tunnel. This can be useful when you find yourself in
+      the situation that your Internet access is firewalled, but pings are
+      allowed.
+    '';
+    homepage = http://code.gerade.org/hans/;
+    license = licenses.gpl3Plus;
+    platforms = platforms.linux;
+    maintainers = with maintainers; [ nckx ];
+  };
 }