{
  description = "A flake to build a kernel module";

  inputs = {
    nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
  };

  outputs = { self, nixpkgs }: let
      pkgs = import nixpkgs {
        system = "x86_64-linux";
      };
    in {
    packages.x86_64-linux = {
      default = pkgs.stdenv.mkDerivation rec {
        pname = "redragon_m811_battery";
        version = "0.1";
        kernel = pkgs.linuxPackages_zen.kernel;

        src = ./.;


        hardeningDisable = [ "pic" "format" ];                                             # 1
        nativeBuildInputs = kernel.moduleBuildDependencies;                       # 2

        makeFlags = [
          "KERNELRELEASE=${kernel.modDirVersion}"                                 # 3
          "KERNEL_DIR=${kernel.dev}/lib/modules/${kernel.modDirVersion}/build"    # 4
          "INSTALL_MOD_PATH=$(out)"                                               # 5
        ];

        configurePhase = 
          let makefile = pkgs.writeTextFile { name = ''Makefile''; text = ''
            KERNELRELEASE ?= $(shell uname -r)
            KERNEL_DIR  ?= /lib/modules/$(KERNELRELEASE)/build
            PWD := $(shell pwd)

            obj-m += redragon_m811_battery.o

            all:
            ${"\t"}$(MAKE) -C $(KERNEL_DIR) M=$(PWD) modules

            install:
            ${"\t"}$(MAKE) -C $(KERNEL_DIR) M=$(PWD) modules_install

            clean:
            ${"\t"}$(MAKE) -C $(KERNEL_DIR) M=$(PWD) clean

            insmod:
            ${"\t"}sudo insmod redragon_m811_battery.ko

            rmmod:
            ${"\t"}sudo rmmod redragon_m811_battery.ko
          ''; };
        in ''
          cp "${makefile}" Makefile
        '';
      };
    };
  };
}