{
  description = "grimmauld-nixos";

  inputs = {
    nixpkgs = {
      url = "github:NixOS/nixpkgs/nixos-unstable";
      # url = "git+file:///home/grimmauld/coding/nixpkgs";
    };
    nixpkgs-stable = {
      url = "github:NixOS/nixpkgs/nixos-23.11";
    };
    chaotic = {
      url = "github:chaotic-cx/nyx/nyxpkgs-unstable";
      inputs.nixpkgs.follows = "nixpkgs";
    };
    agenix = {
      url = "github:ryantm/agenix";
      inputs.nixpkgs.follows = "nixpkgs";
    };
    nix-gaming = {
      url = "github:fufexan/nix-gaming";
      inputs.nixpkgs.follows = "nixpkgs";
    };
    nix-locate = {
      url = "github:nix-community/nix-index";
      inputs.nixpkgs.follows = "nixpkgs";
    };
    hammering = {
      url = "github:jtojnar/nixpkgs-hammering";
      inputs.nixpkgs.follows = "nixpkgs";
    };
  };

  outputs = inputs @ { self, nix-gaming, agenix, hammering, nixpkgs, nixpkgs-stable, nix-locate, chaotic, ... }:
    let
      patches = [
        {
          # tlpui
          url = "https://patch-diff.githubusercontent.com/raw/NixOS/nixpkgs/pull/305278.patch";
          hash = "sha256-8RvPI8Id+Ttgv07IMBTAxkSc+K00WhiWgdgrCcULd7o=";
        }
        {
          # xdg term
          url = "https://patch-diff.githubusercontent.com/raw/NixOS/nixpkgs/pull/303225.patch";
          hash = "sha256-+CBCMeBc5NqtjaUUTX1DBKhlFlKf1G6ovWrAo6xHH+I=";
        }
      ];

      customNixosSystem = system: definitions:
        let
          stable = import nixpkgs-stable {
            inherit system;
            config.allowUnfree = true;
          };
          overlays = if (builtins.hasAttr "overlays" definitions) then definitions.overlays else [ ];
          unpatched = nixpkgs.legacyPackages.${system};
          patched = unpatched.applyPatches {
            name = "nixpkgs-patched";
            src = inputs.nixpkgs;
            patches = map unpatched.fetchpatch patches;
          };
          nixosSystem = import (patched + "/nixos/lib/eval-config.nix");
        in
        nixosSystem ({
          inherit system;
          modules = definitions.modules ++ [
            ({ config, lib, ... }: {
              nixpkgs.overlays = map (f: (final: prev: (import f { inherit final prev lib config; }))) overlays;
            })
          ];
          specialArgs = { inherit inputs system stable; };
        } // builtins.removeAttrs definitions [ "overlays" "modules" ]);
    in
    {
      nixosConfigurations = {
        grimmauld-nixos = customNixosSystem "x86_64-linux" {
          overlays = import ./overlays;
          modules = [
            agenix.nixosModules.default
            chaotic.nixosModules.default
            nix-gaming.nixosModules.pipewireLowLatency
            ./common
            ./specific/grimm-nixos-laptop/configuration.nix
            ./configuration.nix
            ./modules/users.nix
            ./modules/system-packages.nix
            ./modules/kvm.nix
          ];
        };
      };
    };
}