{
  description = "Noisebell - door monitor system";

  inputs = {
    nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
    agenix = {
      url = "github:ryantm/agenix";
      inputs.nixpkgs.follows = "nixpkgs";
    };
    pi-service.url = "path:./pi/pi-service";
    remote.url = "path:./remote";
    remote.inputs.nixpkgs.follows = "nixpkgs";
  };

  outputs = { self, nixpkgs, agenix, pi-service, remote }: {
    nixosModules = remote.nixosModules;

    nixosConfigurations.pi = nixpkgs.lib.nixosSystem {
      system = "aarch64-linux";
      modules = [
        agenix.nixosModules.default
        (import ./pi/module.nix {
          pkg = pi-service.packages.aarch64-linux.default;
          rev = self.shortRev or "dirty";
        })
        ./pi/configuration.nix
        ./pi/hardware-configuration.nix
      ];
    };

    nixosConfigurations.bootstrap = nixpkgs.lib.nixosSystem {
      system = "aarch64-linux";
      modules = [ ./pi/bootstrap.nix ];
    };

    devShells.x86_64-linux.default = let
      pkgs = nixpkgs.legacyPackages.x86_64-linux;
    in pkgs.mkShell {
      packages = [ agenix.packages.x86_64-linux.default ];
    };
  };
}