{
  description = "Timo's Shared Nix Modules";

  inputs = {
    nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
  };

  outputs = { self, nixpkgs, ... }: {
    # Set up formatter.
    formatter.x86_64-linux = nixpkgs.legacyPackages.x86_64-linux.nixpkgs-fmt;

    # Global all-hosts configuration
    nixosModules.default = { ... }: {
      imports = [
        ./system/default/editor.nix
        ./system/default/nix.nix
        ./system/default/packages.nix
        ./system/default/prompt.nix
        ./system/default/scripts.nix
        ./system/default/ssh-authorized-keys.nix
      ];
    };

    # Linux specific system configuration
    nixosModules.linux = { ... }: {
      imports = [
        ./system/linux/i18n.nix
        ./system/linux/openssh.nix
        ./system/linux/system.nix
        ./system/linux/user-tb.nix
      ];
    };

    # MacOS specific system configuration
    nixosModules.macos = { ... }: {
      imports = [
        ./system/macos/environment.nix
        ./system/macos/fonts.nix
        ./system/macos/hotkeys.nix
        ./system/macos/nix.nix
        ./system/macos/system.nix
        ./system/macos/yabai.nix
      ];
    };

    # Tools on all development machines
    nixosModules.develop = { ... }: {
      imports = [
        ./system/develop/packages.nix
        ./system/develop/scripts.nix
      ];
    };

    # Home Manager Modules
    homeManagerModules.default = { ... }: {
      imports = [
        ./home/default/bash.nix
        ./home/default/basic.nix
        ./home/default/direnv.nix
        ./home/default/git.nix
      ];
    };

    # Add private homelab and cloud host aliases
    homeManagerModules.private = { ... }: {
      imports = [
        ./home/private/ssh-hosts.nix
      ];
    };

    # MacOS specific home configuration
    homeManagerModules.macos = { ... }: {
      imports = [
        ./home/macos/home.nix
      ];
    };

    # Emacs Configuration
    homeManagerModules.develop = { ... }: {
      imports = [
        ./home/develop/emacs.nix
      ];
    };

    # Claude Code configuration
    homeManagerModules.claude = { ... }: {
      imports = [
        ./home/claude/config.nix
      ];
    };
  };
}