Change hostname from nixos to elnupad

configuration.nix

@@ -26,7 +26,7 @@ in
     };
   };
 
-  # networking.hostName = "elnupad"; # Define your hostname.
+  networking.hostName = "elnupad"; # Define your hostname.
   # Pick only one of the below networking options.
   # networking.wireless.enable = true;  # Enables wireless support via wpa_supplicant.
   networking.networkmanager.enable = true;  # Easiest to use and most distros use this by default.