{
  description = "Numbus - Simplified NixOS deployments";

  inputs = {
    # Nix unstable packages
    nixpkgs.url = "github:nixos/nixpkgs/nixos-unstable";
    # Nix stable packages
    nixpkgs-stable.url = "github:nixos/nixpkgs/nixos-25.11";
    # Numbus
    numbus.url = "https://gittea.dev/numbus/numbus";
    # Disko
    disko.url = "github:nix-community/disko";
    disko.inputs.nixpkgs.follows = "nixpkgs";
    # Sops-nix
    sops-nix.url = "github:Mic92/sops-nix";
    sops-nix.inputs.nixpkgs.follows = "nixpkgs";
    # Flatpaks
    nix-flatpak.url = "github:gmodena/nix-flatpak";
  };

  outputs = { self, nixpkgs, ... }@inputs: 
    let
      system = "x86_64-linux";
      pkgs = nixpkgs.legacyPackages.${system};
      
      # Helper for defining systems
      mkNumbus = { deviceModule, extraModules ? [], nixpkgsRef, deviceType }: nixpkgsRef.lib.nixosSystem {
        inherit system;
        specialArgs = { inherit inputs deviceType; };
        modules = [
          inputs.disko.nixosModules.disko
          inputs.sops-nix.nixosModules.sops
          self.nixosModules.common
          deviceModule
        ] ++ extraModules;
      };
    in {
      nixosModules = {
        common = ./modules/common/default.nix;
        server = ./modules/server/default.nix;
        backup = ./modules/backup/default.nix;
        console = ./modules/console/default.nix;
        computer = ./modules/computer/default.nix;
        tv = ./modules/tv/default.nix;
      };

      nixosConfigurations = {
        numbus-server = mkNumbus {
          deviceModule = self.nixosModules.server;
          nixpkgsRef = inputs.nixpkgs-stable;
          deviceType = "server";
        };

        numbus-backup = mkNumbus {
          deviceModule = self.nixosModules.backup;
          nixpkgsRef = inputs.nixpkgs-stable;
          deviceType = "backup";
        };

        numbus-computer = mkNumbus {
          deviceModule = self.nixosModules.computer;
          extraModules = [ inputs.nix-flatpak.nixosModules.nix-flatpak ];
          nixpkgsRef = inputs.nixpkgs;
          deviceType = "computer";
        };

        numbus-console = mkNumbus {
          deviceModule = self.nixosModules.console;
          nixpkgsRef = inputs.nixpkgs;
          deviceType = "console";
        };

        numbus-tv = mkNumbus {
          deviceModule = self.nixosModules.tv;
          nixpkgsRef = inputs.nixpkgs;
          extraModules = [ inputs.nix-flatpak.nixosModules.nix-flatpak ];
          deviceType = "tv";
        };
      };
    };
}