{
  description = "Thor system configuration";

  inputs = {
    nixpkgs.url = "github:NixOS/nixpkgs/release-22.05";
    home-manager = { url = "github:nix-community/home-manager/release-22.05"; inputs.nixpkgs.follows = "nixpkgs"; };

    unstable.url = "github:NixOS/nixpkgs/nixos-unstable";
    home-manager-unstable = { url = "github:nix-community/home-manager"; inputs.nixpkgs.follows = "unstable"; };

    flake-utils.url = "github:numtide/flake-utils";
    nixos-hardware.url = "github:NixOS/nixos-hardware";

    nix-rice = { url = "github:bertof/nix-rice"; inputs.inxpkgs.follows = "unstable"; inputs.flake-utils.follows = "flake-utils"; };
    pre-commit-hooks = { url = "github:cachix/pre-commit-hooks.nix"; inputs.nixpkgs.follows = "nixpkgs"; inputs.flake-utils.follows = "flake-utils"; };
    tex2nix = { url = github:Mic92/tex2nix; inputs.nixpkgs.follows = "nixpkgs"; inputs.flake-utils.follows = "flake-utils"; };
  };

  outputs =
    { self
    , nixpkgs
    , home-manager
    , unstable
    , home-manager-unstable
    , flake-utils
    , nixos-hardware
    , tex2nix
    , nix-rice
    , pre-commit-hooks
    }:
    let
      system = "x86_64-linux";
      overlaysBuilder = system: [
        (nix-rice.overlays.default)
        (import ./rice.nix)
        (_: _: { inherit (tex2nix.packages.${system}) tex2nix; })
        (final: _: {
          update-background = final.callPackage ./custom/update-background { backgrounds_directory = "$HOME/Immagini/Sfondi/1080+/1440+"; };
          lockscreen = final.callPackage ./custom/lockscreen { palette = final.rice.colorPalette; font = final.rice.font.normal; };
        })
        (_: _: { stable = pkgs; })
        (_: _: { unstable = unstablePkgs; })
      ];
      nixpkgsSettings = {
        inherit system;
        overlays = overlaysBuilder system;
        config = {
          extraOptions = "experimental-features = nix-command flakes";
          allowUnfree = true;
          permittedInsecurePackages = [ "electron-9.4.4" ]; # authy dependency
        };
      };
      pkgs = import nixpkgs nixpkgsSettings;
      unstablePkgs = import unstable nixpkgsSettings;
      homeManagerSettings = { home-manager = { useGlobalPkgs = true; useUserPackages = true; }; };

      odinBaseModules = [
        { nixpkgs = nixpkgsSettings; }
        ./nixos_modules/automatic-garbage-collection.nix
        ./odin/hardware-configuration.nix
        nixos-hardware.nixosModules.common-cpu-intel
        nixos-hardware.nixosModules.common-pc-laptop
        nixos-hardware.nixosModules.common-pc-laptop-ssd
        ./odin/common_configuration.nix
      ];

      thorBaseModules = [
        { nixpkgs = nixpkgsSettings; }
        ./nixos_modules/automatic-garbage-collection.nix
        ./thor/hardware-configuration.nix
        nixos-hardware.nixosModules.common-cpu-amd
        nixos-hardware.nixosModules.common-pc-ssd
        ./thor/configuration.nix
      ];

      lokiBaseModules = [
        { nixpkgs = nixpkgsSettings; }
        ./nixos_modules/automatic-garbage-collection.nix
        ./loki/hardware-configuration.nix
        nixos-hardware.nixosModules.common-cpu-intel
        nixos-hardware.nixosModules.common-pc-ssd
        ./loki/configuration.nix
      ];

      odinStable = extraModules: nixpkgs.lib.nixosSystem {
        inherit system;
        modules = odinBaseModules ++ [
          home-manager.nixosModules.home-manager
          homeManagerSettings
          { home-manager.users.bertof = import ./odin/hm.nix; }
        ] ++ extraModules;
      };

      odinUnstable = extraModules: unstable.lib.nixosSystem {
        inherit system;
        modules = odinBaseModules ++ [
          home-manager-unstable.nixosModules.home-manager
          homeManagerSettings
          { home-manager.users.bertof = import ./odin/hm.nix; }
        ] ++ extraModules;
      };

      thorStable = extraModules: nixpkgs.lib.nixosSystem {
        inherit system;
        modules = thorBaseModules ++ [
          home-manager.nixosModules.home-manager
          homeManagerSettings
          { home-manager.users.bertof = import ./thod/hm.nix; }
        ] ++ extraModules;
      };

      thorUnstable = extraModules: unstable.lib.nixosSystem {
        inherit system;
        modules = thorBaseModules ++ [
          home-manager-unstable.nixosModules.home-manager
          homeManagerSettings
          { home-manager.users.bertof = import ./thod/hm.nix; }
        ] ++ extraModules;
      };

      lokiUnstable = extraModules: unstable.lib.nixosSystem {
        inherit system;
        modules = lokiBaseModules ++ [
          home-manager-unstable.nixosModules.home-manager
          homeManagerSettings
          { home-manager.users.bertof = import ./loki/hm.nix; }
        ] ++ extraModules;
      };

      lokiStable = extraModules: nixpkgs.lib.nixosSystem {
        inherit system;
        modules = lokiBaseModules ++ [
          home-manager.nixosModules.home-manager
          homeManagerSettings
          { home-manager.users.bertof = import ./loki/hm.nix; }
        ] ++ extraModules;
      };

    in
    {
      packages.${system} = unstablePkgs;

      nixosConfigurations = rec {

        thor = thor-unstable;
        thor-stable = thorStable [ ./nixos_modules/pro_audio.nix ./nixos_modules/sesar.nix ];
        thor-unstable = thorUnstable [ ./nixos_modules/pro_audio.nix ./nixos_modules/sesar.nix ];
        # thor-big-data = thorUnstable [ ./nixos_modules/pro_audio.nix ./nixos_modules/big_data.nix ./nixos_modules/sesar.nix ];

        odin = odin-intel;
        odin-intel = odin-intel-stable;
        odin-nvidia = odin-nvidia-stable;
        odin-intel-unstable = odinUnstable [ ./odin/configuration-intel.nix ./nixos_modules/pro_audio.nix ./nixos_modules/sesar.nix ];
        odin-nvidia-unstable = odinUnstable [ ./odin/configuration-nvidia.nix ./nixos_modules/pro_audio.nix ./nixos_modules/sesar.nix ];
        odin-intel-stable = odinStable [ ./odin/configuration-intel.nix ./nixos_modules/pro_audio.nix ./nixos_modules/sesar.nix ];
        odin-nvidia-stable = odinStable [ ./odin/configuration-nvidia.nix ./nixos_modules/pro_audio.nix ./nixos_modules/sesar.nix ];

        loki = loki-stable;
        loki-stable = lokiStable [ ./nixos_modules/dnsmasq.nix ];
        loki-k3s = lokiStable [ ./nixos_modules/k3s.nix ];
        loki-unstable = lokiUnstable [ ];

      };
    } // (flake-utils.lib.eachDefaultSystem (system:
    let unstablePkgs = import unstable { inherit system; overlays = overlaysBuilder system; };
    in
    rec {
      checks = {
        pre-commit-check = pre-commit-hooks.lib.${system}.run {
          src = ./.;
          hooks = { nixpkgs-fmt.enable = true; nix-linter.enable = true; };
        };
      };

      devShells.default = unstablePkgs.mkShell {
        shellHook = ''
          ${self.checks.${system}.pre-commit-check.shellHook}
        '';
      };
    }));
}