nixos-combined-flake/lib/mkSystem.nix

{
  inputs,
  system,
  hostName,
  nixpkgs,
  vars,
  ...
}: {
  ${hostName} = nixpkgs.lib.nixosSystem {
    inherit system;
    specialArgs = {
      inherit inputs;
      vars =
        vars
        // {
          inherit hostName;
        };
    };
    modules = [
      ../hosts/${hostName}/configuration.nix
    ];
  };
}