stockfish: 16 -> 16.1

           if stdenv.isAarch64 then "armv8" else

           "unknown";

    nnueFile = "nn-5af11540bbfe.nnue";

    nnue = fetchurl {

      name = nnueFile;

      url = "https://tests.stockfishchess.org/api/nn/${nnueFile}";

      sha256 = "sha256-WvEVQLv+/LVOOMXdAAyrS0ad+nWZodVb5dJyLCCokps=";

    # These files can be found in src/evaluate.h

    nnueBigFile = "nn-b1a57edbea57.nnue";

    nnueBig = fetchurl {

      name = nnueBigFile;

      url = "https://tests.stockfishchess.org/api/nn/${nnueBigFile}";

      sha256 = "sha256-saV+2+pXTKi4jWg3RzhFeRvrU9iF+H+G1czdVln787I=";

    };

    nnueSmallFile = "nn-baff1ede1f90.nnue";

    nnueSmall = fetchurl {

      name = nnueSmallFile;

      url = "https://tests.stockfishchess.org/api/nn/${nnueSmallFile}";

      sha256 = "sha256-uv8e3h+Qwd0bT3cvHv8phIghgB6BhjRdp/DrQSG9b2M=";

    };

in

stdenv.mkDerivation rec {

  pname = "stockfish";

  version = "16";

  version = "16.1";

  src = fetchFromGitHub {

    owner = "official-stockfish";

    repo = "Stockfish";

    rev = "sf_${version}";

    sha256 = "sha256-ASy2vIP94lnSKgxixK1GoC84yAysaJpxeyuggV4MrP4=";

    sha256 = "sha256-xTtjfJgEHF0SQT9Fw/9RLZA0Quh00jrIbihr7IYCm2U=";

  };

  postUnpack = ''

    sourceRoot+=/src

    echo ${nnue}

    cp "${nnue}" "$sourceRoot/${nnueFile}"

    cp "${nnueBig}" "$sourceRoot/${nnueBigFile}"

    cp "${nnueSmall}" "$sourceRoot/${nnueSmallFile}"

  '';

  makeFlags = [ "PREFIX=$(out)" "ARCH=${arch}" "CXX=${stdenv.cc.targetPrefix}c++" ];