{
  description = "Greg Burd's NixOS and Home Manager Configuration";

  inputs = {
    nixpkgs.url = "github:nixos/nixpkgs/nixos-23.11";
    # You can access packages and modules from different nixpkgs revs at the
    # same time.  See 'unstable-packages' overlay in 'overlays/default.nix'.
    nixpkgs-unstable.url = "github:nixos/nixpkgs/nixos-unstable";

    agenix.url = "github:ryantm/agenix";
    agenix.inputs.nixpkgs.follows = "nixpkgs";

    disko.url = "github:nix-community/disko";
    disko.inputs.nixpkgs.follows = "nixpkgs";

    #fh.url = "https://flakehub.com/f/DeterminateSystems/fh/*.tar.gz";

    home-manager.url = "github:nix-community/home-manager/release-23.11";
    home-manager.inputs.nixpkgs.follows = "nixpkgs";

    nixos-hardware.url = "github:nixos/nixos-hardware/master";

    impermanence.url = "github:nix-community/impermanence";

    nix-formatter-pack.url = "github:Gerschtli/nix-formatter-pack";
    nix-formatter-pack.inputs.nixpkgs.follows = "nixpkgs";

    vscode-server.url = "github:nix-community/nixos-vscode-server";
    vscode-server.inputs.nixpkgs.follows = "nixpkgs";

    sops-nix.url = "github:mic92/sops-nix";
    sops-nix.inputs.nixpkgs.follows = "nixpkgs";
    sops-nix.inputs.nixpkgs-stable.follows = "nixpkgs";

    nh.url = "github:viperml/nh";
    nh.inputs.nixpkgs.follows = "nixpkgs";

    firefox-addons.url = "gitlab:rycee/nur-expressions?dir=pkgs/firefox-addons";
    firefox-addons.inputs.nixpkgs.follows = "nixpkgs";

  };
  outputs =
    { self
    , nixpkgs
    , nix-formatter-pack
    , ...
    } @ inputs:
    let
      inherit (self) outputs;
      # https://nixos.wiki/wiki/FAQ/When_do_I_update_stateVersion
      stateVersion = "23.11";
      libx = import ./lib { inherit inputs outputs stateVersion; };
    in
    {
      # home-manager switch -b backup --flake $HOME/ws/nix-config
      # nix build .#homeConfigurations."gburd@floki".activationPackage
      homeConfigurations = {
        # .iso images
        # "gburd@iso-console" = libx.mkHome { hostname = "iso-console"; username = "nixos"; };
        # "gburd@iso-desktop" = libx.mkHome { hostname = "iso-desktop"; username = "nixos"; desktop = "pantheon"; };
        # Workstations
        "gburd@floki" = libx.mkHome { hostname = "floki"; username = "gburd"; desktop = "pantheon"; };
        # Servers
      };

      nixosConfigurations = {
        # .iso images
        #  - nix build .#nixosConfigurations.{iso-console|iso-desktop}.config.system.build.isoImage
        # iso-console = libx.mkHost { hostname = "iso-console"; username = "nixos"; installer = nixpkgs + "/nixos/modules/installer/cd-dvd/installation-cd-minimal.nix"; };
        # iso-desktop = libx.mkHost { hostname = "iso-desktop"; username = "nixos"; installer = nixpkgs + "/nixos/modules/installer/cd-dvd/installation-cd-graphical-calamares.nix"; desktop = "pantheon"; };
        # Workstations
        # Lenovo Carbon X1 Extreme Gen 5 - x86_64
        floki = libx.mkHost { hostname = "floki"; username = "gburd"; desktop = "pantheon"; };
        # Servers
      };

      # Devshell for bootstrapping; acessible via 'nix develop' or 'nix-shell' (legacy)
      devShells = libx.forAllSystems (system:
        let pkgs = nixpkgs.legacyPackages.${system};
        in import ./shell.nix { inherit pkgs; }
      );

      # nix fmt
      formatter = libx.forAllSystems (system:
        nix-formatter-pack.lib.mkFormatter {
          pkgs = nixpkgs.legacyPackages.${system};
          config.tools = {
            alejandra.enable = false;
            deadnix.enable = true;
            nixpkgs-fmt.enable = true;
            statix.enable = true;
          };
        }
      );

      # Custom packages and modifications, exported as overlays
      overlays = import ./overlays { inherit inputs outputs; };

      homeManagerModules = import ./modules/home-manager;

      # Custom packages; acessible via 'nix build', 'nix shell', etc
      packages = libx.forAllSystems (system:
        let pkgs = nixpkgs.legacyPackages.${system};
        in import ./pkgs { inherit pkgs; }
      );
    };
}