Update lxc config for alt

hosts/alt/configuration.nix

@@ -2,15 +2,21 @@
 # your system.  Help is available in the configuration.nix(5) man page
 # and in the NixOS manual (accessible by running ‘nixos-help’).
 
-{ config, pkgs, inputs, ... }:
+{ config, modulesPath, pkgs, inputs, ... }:
 
 {
   imports =
     [ # Include the results of the hardware scan.
-      ./hardware-configuration.nix
+      (modulesPath + "/virtualisation/proxmox-lxc.nix")
       ../modules/base.nix
     ];
 
+  nix.settings = { sandbox = false; };
+  proxmoxLXC = {
+    manageNetwork = false;
+    privileged = true;
+  };
+
   networking.hostName = "alt"; # Define your hostname.
 
   # This value determines the NixOS release from which the default