{ lib, stdenv, fetchurl, postgresql, autoPatchelfHook, writeScript }:

let
  arch = if stdenv.hostPlatform.is64bit then "amd64" else "x86";
in stdenv.mkDerivation rec {
  pname = "teamspeak-server";
  version = "3.13.7";

  src = fetchurl {
    url = "https://files.teamspeak-services.com/releases/server/${version}/teamspeak3-server_linux_${arch}-${version}.tar.bz2";
    sha256 = if stdenv.hostPlatform.is64bit
      then "sha256-d1pXMamAmAHkyPkGbNm8ViobNoVTE5wSSfKgdA1QBB4="
      else "sha256-aMEDOnvBeKfzG8lDFhU8I5DYgG53IsCDBMV2MUyJi2g=";
  };

  buildInputs = [ stdenv.cc.cc postgresql.lib ];

  nativeBuildInputs = [ autoPatchelfHook ];

  installPhase = ''
    runHook preInstall

    # Install files.
    mkdir -p $out/lib/teamspeak
    mv * $out/lib/teamspeak/

    # Make symlinks to the binaries from bin.
    mkdir -p $out/bin/
    ln -s $out/lib/teamspeak/ts3server $out/bin/ts3server
    ln -s $out/lib/teamspeak/tsdns/tsdnsserver $out/bin/tsdnsserver

    runHook postInstall
  '';

  passthru.updateScript = writeScript "update-teampeak-server" ''
    #!/usr/bin/env nix-shell
    #!nix-shell -i bash -p common-updater-scripts curl gnugrep gnused jq pup

    set -eu -o pipefail

    version=$( \
      curl https://www.teamspeak.com/en/downloads/ \
        | pup "#server .linux .version json{}" \
        | jq -r ".[0].text"
    )

    versionOld=$(nix-instantiate --eval --strict -A "teamspeak_server.version")

    nixFile=pkgs/applications/networking/instant-messengers/teamspeak/server.nix

    update-source-version teamspeak_server "$version" --system=i686-linux

    sed -i -e "s/version = \"$version\";/version = $versionOld;/" "$nixFile"

    update-source-version teamspeak_server "$version" --system=x86_64-linux
  '';

  meta = with lib; {
    description = "TeamSpeak voice communication server";
    homepage = "https://teamspeak.com/";
    sourceProvenance = with sourceTypes; [ binaryNativeCode ];
    # See distribution-permit.txt for a confirmation that nixpkgs is allowed to distribute TeamSpeak.
    license = licenses.unfreeRedistributable;
    platforms = platforms.linux;
    maintainers = with maintainers; [ arobyn gerschtli ];
  };
}