{ lib, mkDerivation
, bsdSetupHook, netbsdSetupHook
, makeMinimal
, install, mandoc, groff, rsync, nbperf, rpcgen
, common
, defaultMakeFlags
, stdenv
}:

mkDerivation {
  path = "include";
  version = "9.2";
  sha256 = "0nxnmj4c8s3hb9n3fpcmd0zl3l1nmhivqgi9a35sis943qvpgl9h";
  nativeBuildInputs = [
    bsdSetupHook netbsdSetupHook
    makeMinimal
    install mandoc groff rsync nbperf rpcgen
  ];

  # The makefiles define INCSDIR per subdirectory, so we have to set
  # something else on the command line so those definitions aren't
  # overridden.
  postPatch = ''
    find "$BSDSRCDIR" -name Makefile -exec \
      sed -i -E \
        -e 's_/usr/include_''${INCSDIR0}_' \
        {} \;
  '';

  # multiple header dirs, see above
  postConfigure = ''
    makeFlags=''${makeFlags/INCSDIR/INCSDIR0}
  '';

  extraPaths = [ common ];
  headersOnly = true;
  noCC = true;
  meta.platforms = lib.platforms.netbsd;
  makeFlags = defaultMakeFlags ++ [ "RPCGEN_CPP=${stdenv.cc.cc}/bin/cpp" ];
}