dev/rkt: update dependencies

derivations/dev/rkt.nix

@@ -1,11 +1,11 @@
 {
-pkgs ? import /home/steveej/src/github/NixOS/nixpkgs-systemsource {},
+pkgs ? import /home/steveej/src/github/NixOS/nixpkgs {},
 mkGoEnv ? import ./go.nix,
 }:
 let 
   rktBasebuildInputs = with pkgs; [
-    stdenv.glibc.out
-    stdenv.glibc.static
+    glibc.out
+    glibc.static
     autoreconfHook
     gnupg1
     squashfsTools
@@ -23,6 +23,8 @@ let
     iptables
     bc
     acl
+    trousers
+    systemd
   ];
 in {
   go15 = mkGoEnv {