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{ lib, mkDerivation
, include
, bsdSetupHook, netbsdSetupHook
, makeMinimal, install, tsort, lorder, statHook, rsync, uudecode, config, genassym
, defaultMakeFlags
, common
}:
{
  path = "sys";
  version = "9.2";
  sha256 = "03s18q8d9giipf05bx199fajc2qwikji0djz7hw63d2lya6bfnpj";

  # Make the build ignore linker warnings
  prePatch = ''
    substituteInPlace sys/conf/Makefile.kern.inc \
      --replace "-Wa,--fatal-warnings" ""
  '';

  patches = [
    # Fix this error when building bootia32.efi and bootx64.efi:
    # error: PHDR segment not covered by LOAD segment
    ./no-dynamic-linker.patch

    # multiple header dirs, see above
    ./sys-headers-incsdir.patch
  ];

  postPatch =
    ''
      substituteInPlace sys/arch/i386/stand/efiboot/Makefile.efiboot \
        --replace "-nocombreloc" "-z nocombreloc"
    '' +
    # multiple header dirs, see above
    include.postPatch;

  CONFIG = "GENERIC";

  propagatedBuildInputs = [ include ];
  nativeBuildInputs = [
    bsdSetupHook netbsdSetupHook
    makeMinimal install tsort lorder statHook rsync uudecode config genassym
  ];

  postConfigure = ''
    pushd arch/$MACHINE/conf
    config $CONFIG
    popd
  ''
    # multiple header dirs, see above
    + include.postConfigure;

  makeFlags = defaultMakeFlags ++ [ "FIRMWAREDIR=$(out)/libdata/firmware" ];
  hardeningDisable = [ "pic" ];
  MKKMOD = "no";
  env.NIX_CFLAGS_COMPILE = toString [
    "-Wno-error=array-parameter"
    "-Wno-error=array-bounds"
    "-Wa,--no-warn"
  ];

  postBuild = ''
    make -C arch/$MACHINE/compile/$CONFIG $makeFlags
  '';

  postInstall = ''
    cp arch/$MACHINE/compile/$CONFIG/netbsd $out
  '';

  meta.platforms = lib.platforms.netbsd;
  extraPaths = [ common ];

}