{ self, nixpkgs, ... }@inputs:
rec {
  defSystem =
    system: systemConfig: deployConfig:
    nixpkgs.lib.nixosSystem {
      system = "${system}";
      modules =
        (systemModules system systemConfig)
        ++ (nixpkgs.lib.optional (deployConfig != null) { _module.args.nixinate = deployConfig; });
    };

  systemModules =
    system: systemConfig:
    builtins.attrValues self.nixosModules
    ++ [
      { _module.args.inputs = inputs; }
      { _module.args.self-overlay = self.overlays.default; }

      {
        nix.nixPath = [ "nixpkgs=${nixpkgs}" ];
        nixpkgs = {
          overlays =
            [
              self.overlays.default
              inputs.rust-overlay.overlays.default
              inputs.emacs-overlay.overlay
              inputs.eww.overlays.default
              inputs.nil.overlays.default
              inputs.caddy-nix.overlays.default
              inputs.ha-now-playing.overlays.${system}
              inputs.pamedia.overlays.default
            ]
            ++ nixpkgs.lib.optional (system == "aarch64-linux") (
              _final: super: { makeModulesClosure = x: super.makeModulesClosure (x // { allowMissing = true; }); }
            );

          config = {
            allowUnfree = true;
            firefox = {
              speechSynthesisSupport = true;
              ffmpegSupport = true;
              pipewireSupport = true;
            };
          };
        };
        home-manager = {
          useUserPackages = true;
          useGlobalPkgs = true;
        };
        system.configurationRevision = nixpkgs.lib.mkIf (self ? rev) self.rev;
        nix.registry.nixpkgs.flake = nixpkgs;
      }

      systemConfig
      inputs.home-manager.nixosModules.home-manager

      inputs.sops.nixosModules.sops
    ];
}