Add remote builds (#4)

Reviewed-on: greyweather/nixos#4

global-default.nix

@@ -53,7 +53,6 @@ in {
     isNormalUser = true;
     description = "grey";
     extraGroups = [ "networkmanager" "wheel" ];
-    packages = with pkgs; [];
   };
 
   nixpkgs.config.allowUnfree = true;