{
  stdenv,
  jdk21,
  which,
  zip,
  buildPackages,
}:
if stdenv.buildPlatform == stdenv.hostPlatform
then jdk21
else
  jdk21.overrideAttrs (old: {
    # lol, nixpkgs can’t get pkgs right
    # AUTOCONF = "${autoconf}/bin/autoconf";
    nativeBuildInputs = old.nativeBuildInputs ++ [which zip];
    depsBuildBuild = with buildPackages; [stdenv.cc autoconf];
    configureFlags =
      old.configureFlags
      ++ [
        "--with-jtreg=no"
        "--with-build-jdk=${buildPackages.jdk21}"
      ];
  })