{ self
, nixpkgs-unstable
, nixpkgs
, sops-nix
, inputs
, nixos-hardware
, home-manager
, ...
}:
let
  nixosSystem = nixpkgs.lib.makeOverridable nixpkgs.lib.nixosSystem;
  nixosSystemUnstable = nixpkgs-unstable.lib.makeOverridable nixpkgs-unstable.lib.nixosSystem;

  baseModules = [
    # make flake inputs accessiable in NixOS
    { _module.args.inputs = inputs; }
    {
      imports = [
        ({ pkgs, ... }: {
          nix = {
            extraOptions = ''
              experimental-features = nix-command flakes
            '';

            settings = {
              substituters = [
                "https://cache.dynamicdiscord.de"
                "https://cache.nixos.org/"
              ];
              trusted-public-keys = [
                "cache.dynamicdiscord.de:DKueZicqi2NhJJXz9MYgUbiyobMs10fTyHCgAUibRP4="
              ];
              trusted-users = [ "root" "@wheel" ];
            };
          };
        })

        sops-nix.nixosModules.sops
      ];
    }
  ];
  defaultModules = baseModules;
in
{
  moderatio = nixosSystem {
    system = "x86_64-linux";
    specialArgs.inputs = inputs;
    modules = defaultModules ++ [
      ./moderatio/configuration.nix
    ];
  };

  louise = nixosSystem {
    system = "x86_64-linux";
    specialArgs.inputs = inputs;
    modules = defaultModules ++ [
      ./louise/configuration.nix
    ];
  };

  durruti = nixosSystem {
    system = "x86_64-linux";
    specialArgs.inputs = inputs;
    modules = defaultModules ++ [
      ./durruti/configuration.nix
    ];
  };

  lucia = nixosSystem {
    system = "aarch64-linux";
    specialArgs.inputs = inputs;
    modules = defaultModules ++ [
      ./lucia/configuration.nix
      ./lucia/hardware_configuration.nix
    ];
  };
}