{
  description = "Nixos config flake";
     
  inputs = {
    nixpkgs.url = "github:nixos/nixpkgs/nixos-unstable";
    disko.url = "github:nix-community/disko";
    disko.inputs.nixpkgs.follows = "nixpkgs";
    impermanence.url = "github:nix-community/impermanence";
    home-manager.url = "github:nix-community/home-manager";
    home-manager.inputs.nixpkgs.follows = "nixpkgs";
    nixos-hardware.url = "github:NixOS/nixos-hardware/master";
    nix-index-database.url = "github:nix-community/nix-index-database";
    nix-index-database.inputs.nixpkgs.follows = "nixpkgs";
  };

  outputs = 
    inputs@{ nixpkgs, self, ... }:
    let
      system = "x86_64-linux";
      pkgs = import inputs.nixpkgs {
        inherit system;
        config.allowUnfree = true;
      };
      lib = import ./src/lib.nix {
        inherit (nixpkgs) lib;
        inherit pkgs;
        inherit (inputs) home-manager;
      };
      createCommonArgs = system: {
        inherit
          self
          inputs
          nixpkgs
          lib
          pkgs
          system
          ;
        specialArgs = {
          inherit self inputs;
        };
      };
      commonArgs = createCommonArgs system;
      # call with forAllSystems (commonArgs: function body)
      forAllSystems =
        fn:
        lib.genAttrs [
          "x86_64-linux"
          "aarch64-linux"
          "x86_64-darwin"
          "aarch64-darwin"
        ] (system: fn (createCommonArgs system));
    in
    {
      inherit lib self;
      nixosConfigurations = (import ./src/hosts/default.nix commonArgs);
    };

  # outputs = {nixpkgs, ...} @ inputs:
  # {
  #   nixosConfigurations.pickwick = nixpkgs.lib.nixosSystem {
  #     specialArgs = { inherit inputs; };
  #     modules = [
  #       inputs.disko.nixosModules.default
  #       (import ./disko.nix { device = "/dev/nvme0n1"; })

  #       ./configuration.nix
  #             
  #       inputs.home-manager.nixosModules.default
  #       inputs.impermanence.nixosModules.impermanence
  #     ];
  #   };
  # };
}