{
  inputs = {
    nixpkgs.url = "nixpkgs/nixos-unstable";
    stable.url = "nixpkgs/nixos-23.05";
    flake-utils.url = "github:numtide/flake-utils";

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

    impurity.url = "github:outfoxxed/impurity.nix";

    nixpak = {
      url = "github:nixpak/nixpak";
      inputs.nixpkgs.follows = "nixpkgs";
    };

    emacs-overlay = {
      url = "github:nix-community/emacs-overlay";
      inputs.nixpkgs.follows = "nixpkgs";
      inputs.flake-utils.follows = "flake-utils";
    };

    hyprland = {
      url = "github:hyprwm/Hyprland";
      inputs.nixpkgs.follows = "nixpkgs";
    };

    hyprland-hy3 = {
      url = "github:outfoxxed/hy3";
      inputs.hyprland.follows = "hyprland";
    };

    hyprfocus = {
      url = "github:VortexCoyote/hyprfocus";
      inputs.hyprland.follows = "hyprland";
    };

    hyprpaper = {
      url = "github:hyprwm/Hyprpaper";
      #inputs.nixpkgs.follows = "nixpkgs";
    };

    nur.url = "github:nix-community/NUR";

    # devenv
    rust-overlay = {
      url = "github:oxalica/rust-overlay";
      inputs.nixpkgs.follows = "nixpkgs";
      inputs.flake-utils.follows = "flake-utils";
    };
  };

  outputs = inputs @ { self, nixpkgs, ... }: {
    nixosConfigurations = {
      msi = nixpkgs.lib.nixosSystem rec {
        system = "x86_64-linux";
        specialArgs = { inherit self system inputs; };

        modules = [
          ./modules/impurity.nix
          ./modules/preserve-system.nix
          ./modules/devenv
          ./modules/system.nix
          ./modules/hyprland
          ./systems/msi
        ];
      };

      lenovo = nixpkgs.lib.nixosSystem rec {
        system = "x86_64-linux";
        specialArgs = { inherit self system inputs; };

        modules = [
          ./modules/impurity.nix
          ./modules/preserve-system.nix
          ./modules/devenv
          ./modules/system.nix
          ./modules/hyprland
          ./systems/lenovo
        ];
      };

      msi-impure = self.nixosConfigurations.msi.extendModules { modules = [ { impurity.enable = true; } ]; };
      lenovo-impure = self.nixosConfigurations.lenovo.extendModules { modules = [ { impurity.enable = true; } ]; };
    };

    devShells = import ./modules/devenv/flakepart.nix inputs;
  };
}