nixos-config/modules/core/default.server.nix

{ ... }:
{
  imports =
    [ (import ./hardware.nix) ]
    ++ [ (import ./network.nix) ]
    ++ [ (import ./program.nix) ]
    ++ [ (import ./sshd.nix) ]
    ++ [ (import ./security.nix) ]
    ++ [ (import ./services.nix) ]
    ++ [ (import ./system.nix) ]
    ++ [ (import ./user.nix) ]
    ++ [ (import ./virtualization.nix) ];
}