{ stdenv
, lib
, checkbashisms
, coreutils
, ethtool
, fetchFromGitHub
, gawk
, gnugrep
, gnused
, hdparm
, iw
, kmod
, makeWrapper
, pciutils
, perl
, shellcheck
, smartmontools
, systemd
, util-linux
, x86_energy_perf_policy
  # RDW only works with NetworkManager, and thus is optional with default off
, enableRDW ? false
, networkmanager
}: stdenv.mkDerivation rec {
  pname = "tlp";
  version = "1.4.0";

  src = fetchFromGitHub {
    owner = "linrunner";
    repo = "TLP";
    rev = version;
    sha256 = "sha256-Blwj4cqrrYXohnGyJYe+1NYifxqfS4DoVUHmxFf62i4=";
  };

  # XXX: See patch files for relevant explanations.
  patches = [ ./patches/fix-makefile-sed.patch ./patches/tlp-sleep-service.patch ];

  buildInputs = [ perl ];
  nativeBuildInputs = [ makeWrapper gnused ];

  # XXX: While [1] states that DESTDIR should not be used, and that the correct
  # variable to set is, in fact, PREFIX, tlp thinks otherwise. The Makefile for
  # tlp concerns itself only with DESTDIR [2] (possibly incorrectly) and so we set
  # that as opposed to PREFIX, despite what [1] says.
  #
  # [1]: https://github.com/NixOS/nixpkgs/issues/65718
  # [2]: https://github.com/linrunner/TLP/blob/ab788abf4936dfb44fbb408afc34af834230a64d/Makefile#L4-L46
  makeFlags = [
    "DESTDIR=${placeholder "out"}"

    "TLP_NO_INIT=1"
    "TLP_WITH_ELOGIND=0"
    "TLP_WITH_SYSTEMD=1"

    "TLP_BIN=/bin"
    "TLP_CONFDEF=/share/tlp/defaults.conf"
    "TLP_FLIB=/share/tlp/func.d"
    "TLP_MAN=/share/man"
    "TLP_META=/share/metainfo"
    "TLP_SBIN=/sbin"
    "TLP_SHCPL=/share/bash-completion/completions"
    "TLP_TLIB=/share/tlp"
  ];

  installTargets = [ "install-tlp" "install-man" ]
  ++ lib.optionals enableRDW [ "install-rdw" "install-man-rdw" ];

  # XXX: This is disabled because it's basically just noise since upstream
  # itself does not seem to care about the zillion shellcheck errors.
  doCheck = false;
  checkInputs = [ checkbashisms shellcheck ];
  checkTarget = [ "checkall" ];

  postInstall = let
    paths = lib.makeBinPath (
      [
        coreutils
        ethtool
        gawk
        gnugrep
        gnused
        hdparm
        iw
        kmod
        pciutils
        perl
        smartmontools
        systemd
        util-linux
      ] ++ lib.optional enableRDW networkmanager
        ++ lib.optional (lib.meta.availableOn stdenv.hostPlatform x86_energy_perf_policy) x86_energy_perf_policy
    );
  in
    ''
      fixup_perl=(
        $out/share/tlp/tlp-pcilist
        $out/share/tlp/tlp-readconfs
        $out/share/tlp/tlp-usblist
        $out/share/tlp/tpacpi-bat
      )
      for f in "''${fixup_perl[@]}"; do
        wrapProgram "$f" --prefix PATH : "${paths}"
      done

      fixup_bash=(
        $out/bin/*
        $out/etc/NetworkManager/dispatcher.d/*
        $out/lib/udev/tlp-*
        $out/sbin/*
        $out/share/tlp/func.d/*
        $out/share/tlp/tlp-func-base
      )
      for f in "''${fixup_bash[@]}"; do
        sed -i '2iexport PATH=${paths}:$PATH' "$f"
      done
    '';

  meta = with lib; {
    description = "Advanced Power Management for Linux";
    homepage =
      "https://linrunner.de/en/tlp/docs/tlp-linux-advanced-power-management.html";
    platforms = platforms.linux;
    maintainers = with maintainers; [ abbradar lovesegfault ];
    license = licenses.gpl2Plus;
  };
}