{
  description = "Multisystem NixOS Flake of Lennart J. Kurzweg";

  inputs = {
    nixpkgs.url = "nixpkgs/nixos-25.11";
    nixpkgs-unstable.url = "nixpkgs/nixos-unstable";
    nixpkgs-latest.url = "github:nixos/nixpkgs?ref=master";
    nixpkgs24.url = "github:NixOS/nixpkgs/nixos-24.05";

    home-manager = {
      url = "github:nix-community/home-manager/release-25.11";
      inputs.nixpkgs.follows = "nixpkgs";
    };
    home-manager24 ={
      url = "github:nix-community/home-manager/release-24.05";
      inputs.nixpkgs.follows = "nixpkgs24";
    };

    nix-on-droid = {
      url = "github:nix-community/nix-on-droid/release-24.05";
      inputs.nixpkgs.follows = "nixpkgs24";
      inputs.home-manager.follows = "home-manager24";
    };

    nixos-wsl.url = "github:nix-community/NixOS-WSL/main";

    sops-nix ={
      url = "github:Mic92/sops-nix";
      inputs.nixpkgs.follows = "nixpkgs";
    };

    lanzaboote.url = "github:nix-community/lanzaboote/v0.4.2";

    hyprland.url = "git+https://github.com/hyprwm/Hyprland?submodules=1";
    yazi.url = "github:sxyazi/yazi";
    copyparty.url = "github:9001/copyparty";
  };

  outputs = { ... }@inputs: with inputs; let

    system = "x86_64-linux";
    simple-pkgs = import nixpkgs { inherit system; };
    config = { allowUnfreePredicate = pkg: builtins.elem (simple-pkgs.lib.getName pkg) (import ./flake-modules/allowed.nix).unfree; };

    hyper-base = rec {
      system  = "x86_64-linux";
      user    = "nx2";
      domain  = "nx2.site";
      home    = "/home/${user}";
      webroot = "/var/lib/hugo/nx2site/public";
      pkgs-version = "25.11";
    };

    get-pkgs = let s = system; in { host, system?s, nixpkgs?inputs.nixpkgs, version?"25.11" }: import nixpkgs {
      inherit system config;
      overlays = [(final: prev: {
        unstable = import nixpkgs-unstable { inherit system config; };
        latest   = import nixpkgs-latest   { inherit system config; };
        inherit version;
      })] ++ (if host == "NxACE" then [
        copyparty.overlays.default
      ] else []);
    };

    nvidia-base = import ./flake-modules/nvidia.nix;
    secrets     = import ./git-crypt/secrets.nix;
    rice        = import ./flake-modules/rice.nix simple-pkgs;
  in {
    nixosConfigurations = let
      make-nixos-system = host: nvidia-settings: nixpkgs.lib.nixosSystem { 
        pkgs = get-pkgs { inherit host; };
        modules = [ ./configuration.nix ];
        specialArgs = let
          hyper = hyper-base // { inherit host; nvidia = (nvidia-base // nvidia-settings); };
        in { inherit inputs hyper rice secrets; };
      };
      make-nixos-wsl-system = host: nixpkgs.lib.nixosSystem { 
        pkgs = get-pkgs { inherit host; };
        modules = [ ./wsl.nix ];
        specialArgs = let
          hyper = hyper-base // { inherit host; };
          rice = import ./flake-modules/rice.nix pkgs;
        in { inherit inputs hyper rice; };
      };
    in {
      NxXPS = make-nixos-system "NxXPS" { enable = true; prime = true; }; 
      NxNORTH = make-nixos-system "NxNORTH" { enable = true; prime = false; }; 
      NxACE = make-nixos-system "NxACE" { enable = false; };
      NxDCS = make-nixos-wsl-system "NxDCS";
    };

    nixOnDroidConfigurations = let
      makeNODConfiguration = host: nix-on-droid.lib.nixOnDroidConfiguration rec {
        pkgs = let
          options = { inherit host; system = "aarch64-linux"; };
        in (get-pkgs options) //
          (get-pkgs (options // { version = "24.05"; nixpkgs = nixpkgs24; } )
        );
        modules = [ ./nod.nix ];
        home-manager-path = home-manager24.outPath;
        extraSpecialArgs = let
          hyper = hyper-base // { 
            inherit host;
            system = "aarch64-linux";
            user = "nix-on-droid";
            home = "/data/data/com.termux.nix/files/home";
            pkgs-version = "24.05";
          };
          rice = import ./flake-modules/rice.nix pkgs;
        in { inherit inputs hyper rice; };
      };
    in { NxS23U = makeNODConfiguration "NxS23U"; };

    homeConfigurations = let 
      make-home-configuration = host: user: nvidia-settings: home-manager.lib.homeManagerConfiguration {
        pkgs = get-pkgs { inherit host; };
        modules = [ ./home.nix ];
        extraSpecialArgs = let
          hyper = hyper-base // { inherit host; nvidia = nvidia-base // nvidia-settings; };
        in { inherit inputs hyper rice secrets; };
      };
      make-shell-configuration = host: user: home-manager.lib.homeManagerConfiguration {
        pkgs = get-pkgs { inherit host; };
        modules = [ ./shell-only.nix ];
        extraSpecialArgs = let
          hyper = hyper-base // { inherit host; };
        in { inherit inputs hyper rice secrets; };
      };
    in {
      "${hyper-base.user}@NxXPS" = make-home-configuration "NxXPS" hyper-base.user { enable = true; prime = true; }; 
      "${hyper-base.user}@NxNORTH" = make-home-configuration "NxNORTH" hyper-base.user { enable = true; prime = false; }; 
      "${hyper-base.user}@NxACE" = make-home-configuration "NxACE" hyper-base.user { enable = false; }; 

      "${hyper-base.user}@NxDCS" = make-shell-configuration "NxDCS" hyper-base.user;
    };
  };
}