{ stdenv, lib, kernel }:


let modDestDir = "$out/lib/modules/${kernel.modDirVersion}/kernel/drivers/net/wireless/realtek/r8169";

in stdenv.mkDerivation rec {
  name = "r8169-${kernel.version}-${version}";
  version = "6.031.00";

  src = ./r8169-${version}.tar.bz2;

  hardeningDisable = [ "pic" ];

  nativeBuildInputs = kernel.moduleBuildDependencies;

  # rename to avoid conflict with totally broken piece of crap from mainline kernel
  patchPhase =
    ''
    substituteInPlace src/Makefile --replace r8169.o r8169-vendor.o
    substituteInPlace src/Makefile --replace r8169-objs r8169-vendor-objs
    '';

  # avoid using the Makefile directly -- it doesn't understand
  # any kernel but the current.
  # based on the ArchLinux pkgbuild: https://git.archlinux.org/svntogit/community.git/tree/trunk/PKGBUILD?h=packages/r8168
  makeFlags = kernel.makeFlags ++ [
    "-C ${kernel.dev}/lib/modules/${kernel.modDirVersion}/build"
    "M=$(PWD)/src"
    "modules"
  ];
  preBuild = ''
    makeFlagsArray+=("EXTRA_CFLAGS=-DCONFIG_R8169_NAPI -DCONFIG_R8169_VLAN -DCONFIG_ASPM -DENABLE_S5WOL -DENABLE_EEE")
  '';

  enableParallelBuilding = true;

  installPhase = ''
    mkdir -p ${modDestDir}
    find . -name '*.ko' -exec cp --parents '{}' ${modDestDir} \;
    find ${modDestDir} -name '*.ko' -exec xz -f '{}' \;
  '';
}