{
  inputs = {
    nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
    home-manager = {
      url = "github:nix-community/home-manager";
      inputs.nixpkgs.follows = "nixpkgs";
    };
    nur.url = "github:nix-community/NUR";
    fzgo.url = "git+https://git.thomasave.be/thomasave/fzgo.git";
    vicinae.url = "github:vicinaehq/vicinae";
    worktimer = {
      type = "git";
      url = "https://git.thomasave.be/thomasave/WorkTimer";
      ref = "cli";
    };
    astal = {
      url = "github:aylur/astal";
      inputs.nixpkgs.follows = "nixpkgs";
    };

    ags = {
      url = "github:aylur/ags";
      inputs.nixpkgs.follows = "nixpkgs";
      inputs.astal.follows = "astal";
    };
    nixos-06cb-009a-fingerprint-sensor = {
      url = "github:ahbnr/nixos-06cb-009a-fingerprint-sensor?ref=24.11";
      inputs.nixpkgs.follows = "nixpkgs";
    };
  };

  outputs = {
    nixpkgs,
    home-manager,
    nur,
    nixos-06cb-009a-fingerprint-sensor,
    ...
  } @ inputs: let
    supportedSystems = ["x86_64-linux" "aarch64-linux"];
    forAllSystems = nixpkgs.lib.genAttrs supportedSystems;
    system = builtins.currentSystem;
    pkgs = nixpkgs.legacyPackages.${system};
    commonModules = host: user: [
      ./hosts/${host}/hardware-configuration.nix
      {
        nixpkgs.overlays = [
          nur.overlays.default
          (self: super: {utillinux = super.util-linux;})
        ];
      }
      {
        networking.hostName = host;
        time.timeZone = "Asia/Bangkok";
        nix.settings = {
          substituters = [
            "https://nix-community.cachix.org"
            "https://cuda-maintainers.cachix.org"
            "https://vicinae.cachix.org"
          ];
          trusted-public-keys = [
            "nix-community.cachix.org-1:mB9FSh9qf2dCimDSUo8Zy7bkq5CX+/rkCWyvRCYg3Fs="
            "cuda-maintainers.cachix.org-1:0dq3bujKpuEPMCX6U4WylrUDZ9JyUG0VpVZa7CNfq5E="
            "vicinae.cachix.org-1:1kDrfienkGHPYbkpNj1mWTr7Fm1+zcenzgTizIcI3oc="
          ];
          experimental-features = ["nix-command" "flakes"];
          trusted-users = ["root" user];
          keep-outputs = true;
          keep-derivations = true;
          auto-optimise-store = true;
        };
        users.users.${user} = {
          isNormalUser = true;
          extraGroups = ["wheel" "video"]; # Enable ‘sudo’ for the user.
          openssh.authorizedKeys.keys = [
            "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIKAa3tMzSCRuprEACrBsKI0F/o73o6J9L1qR3TaZn/N8 user@Kell"
            "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIByLwLAdJbmoDV5sx4hg5NbzKbOh1GmWEhDOUJ1GQBhK user@Riva"
            "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIBxMq4kubz4wWr4S8xU3GRkPcn6XRS3y7IP+qylN5QAp user@Aloria"
            "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIOAhFTJI49o+eS1kHs5XRrpCLLuhAE+JUCffusudyR88 user@Arendia"
            "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIHtzTFdvLEvXpv69qAWLTipl4hgsKgRrRrWJRecsFthG user@Arch"
            "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIOxtJRtlAphl8euicVUR/6C7o+tyhpYmcbMBLHnldEIX server@mallorea"
            "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAILazQU/Y9I5PkMZoG/Lzc6mDR7s+aRHzqJoFUhYSse4P PocoF1"
            "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIOetfiPyIQ8hbU4t87E0ZrgLqFW9YW09+MNNiusXwW0C user@Asturia"
            "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIFoUYcVMsDw6tmjfdOuQkwaXx8fohKJs/6/5HoLzTP6x Tablet"
          ];
          shell = pkgs.zsh;
        };
        system.stateVersion = "23.11";
      }
      home-manager.nixosModules.home-manager
      {
        home-manager = {
          extraSpecialArgs = {inherit inputs;};
          useGlobalPkgs = true;
          useUserPackages = true;
          users.${user} = {imports = [./home/${host}.nix];};
          backupFileExtension = "bak";
        };
      }
      ./hosts/${host}
    ];
    mkSystem = host: cfg: let
      system = cfg.system or "x86_64-linux";
    in
      nixpkgs.lib.nixosSystem {
        modules =
          (commonModules host cfg.user)
          ++ (cfg.modules or [])
          ++ [
            {nixpkgs.hostPlatform = system;}
          ];
        specialArgs = inputs;
      };
    systems = {
      Riva = {user = "user";};
      Kell = {user = "user";};
      Aloria = {user = "user";};
      Arendia = {
        user = "user";
        modules = [
          nixos-06cb-009a-fingerprint-sensor.nixosModules."06cb-009a-fingerprint-sensor"
        ];
      };
    };
    mkHome = architecture: modulePath:
      home-manager.lib.homeManagerConfiguration {
        pkgs = nixpkgs.legacyPackages.${architecture};
        modules = [modulePath];
        extraSpecialArgs = {inherit inputs;};
      };
  in {
    nixosConfigurations = nixpkgs.lib.mapAttrs mkSystem systems;
    # Automatically injects the correct pkgs and modules for each host
    homeConfigurations = {
      "user@Pi" = mkHome "aarch64-linux" ./home/Pi.nix;
      "ubuntu@Arm" = mkHome "aarch64-linux" ./home/Arm.nix;
      "user@Tolnedra" = mkHome "x86_64-linux" ./home/Tolnedra.nix;
      "server@Vault" = mkHome "x86_64-linux" ./home/Vault.nix;
      "user@Docker" = mkHome "x86_64-linux" ./home/Docker.nix;
      "server@Mallorea" = mkHome "x86_64-linux" ./home/Mallorea.nix;
    };

    # Generic formatter across architectures
    formatter = forAllSystems (
      system:
        nixpkgs.legacyPackages.${system}.alejandra
    );
  };
}