{
  inputs = {
    nixpkgs = {
      # --- Official
      # type = "github";
      # owner = "NixOS";
      # repo = "nixpkgs";
      # ref = "master";
      # --- Fork
      type = "github";
      owner = "karaolidis";
      repo = "nixpkgs";
      ref = "integration";
      # --- Local
      # url = "git+file:./submodules/nixpkgs";
    };

    home-manager = {
      # --- Official
      # type = "github";
      # owner = "nix-community"
      # repo = "home-manager";
      # --- Fork
      type = "github";
      owner = "karaolidis";
      repo = "home-manager";
      ref = "integration";
      # --- Local
      # url = "git+file:./submodules/home-manager";

      inputs.nixpkgs.follows = "nixpkgs";
    };

    disko = {
      type = "github";
      owner = "nix-community";
      repo = "disko";
      ref = "master";

      inputs.nixpkgs.follows = "nixpkgs";
    };

    sops-nix = {
      type = "github";
      owner = "Mic92";
      repo = "sops-nix";
      ref = "master";

      inputs.nixpkgs.follows = "nixpkgs";
    };

    systems = {
      type = "github";
      owner = "nix-systems";
      repo = "default";
      ref = "main";
    };

    nur = {
      type = "github";
      owner = "nix-community";
      repo = "NUR";
      ref = "main";

      inputs.nixpkgs.follows = "nixpkgs";
    };

    flake-utils = {
      type = "github";
      owner = "numtide";
      repo = "flake-utils";
      ref = "main";

      inputs.systems.follows = "systems";
    };

    treefmt-nix = {
      type = "github";
      owner = "numtide";
      repo = "treefmt-nix";
      ref = "main";

      inputs.nixpkgs.follows = "nixpkgs";
    };

    quadlet-nix = {
      type = "github";
      owner = "SEIAROTg";
      repo = "quadlet-nix";
      ref = "main";
    };

    astal = {
      type = "github";
      owner = "aylur";
      repo = "astal";
      ref = "main";

      inputs.nixpkgs.follows = "nixpkgs";
    };

    ags = {
      type = "github";
      owner = "aylur";
      repo = "ags";
      ref = "main";

      inputs = {
        nixpkgs.follows = "nixpkgs";
        astal.follows = "astal";
      };
    };

    spicetify-nix = {
      type = "github";
      owner = "Gerg-L";
      repo = "spicetify-nix";
      ref = "master";

      inputs = {
        nixpkgs.follows = "nixpkgs";
        systems.follows = "systems";
      };
    };

    nvidia-patch = {
      type = "github";
      owner = "icewind1991";
      repo = "nvidia-patch-nixos";
      ref = "main";

      inputs.nixpkgs.follows = "nixpkgs";
    };
  };

  outputs =
    { self, nixpkgs, ... }@inputs:
    {
      nixosConfigurations = {
        installer = nixpkgs.lib.nixosSystem rec {
          system = "x86_64-linux";
          modules = [ ./hosts/installer ];
          specialArgs = { inherit inputs system; };
        };

        himalia = nixpkgs.lib.nixosSystem rec {
          system = "x86_64-linux";
          modules = [ ./hosts/himalia ];
          specialArgs = { inherit inputs system; };
        };

        elara = nixpkgs.lib.nixosSystem rec {
          system = "x86_64-linux";
          modules = [ ./hosts/elara ];
          specialArgs = { inherit inputs system; };
        };

        jupiter = nixpkgs.lib.nixosSystem rec {
          system = "x86_64-linux";
          modules = [ ./hosts/jupiter ];
          specialArgs = { inherit inputs system; };
        };

        jupiter-vps = nixpkgs.lib.nixosSystem rec {
          system = "x86_64-linux";
          modules = [ ./hosts/jupiter-vps ];
          specialArgs = { inherit inputs system; };
        };
      };
    }
    // inputs.flake-utils.lib.eachSystem [ "x86_64-linux" ] (
      system:
      let
        pkgs = import nixpkgs {
          inherit system;
          config.allowUnfree = true;
        };

        treefmt = inputs.treefmt-nix.lib.evalModule pkgs ./treefmt.nix;
      in
      {
        devShells = import ./hosts/common/shells { inherit pkgs; };
        lib = import ./lib { inherit pkgs; };
        packages = import ./packages { inherit pkgs inputs system; };

        formatter = treefmt.config.build.wrapper;
        checks.formatting = treefmt.config.build.check self;
      }
    );
}