{ lib, multiStdenv, pkgsi686Linux
, writeShellScript
, fetchFromGitHub, ed
, hl2sdk, ambuild, metamod-source, libfinite
, mysql_5_5
}: let
  inherit (pkgsi686Linux) zlib;
  owner = "alliedmodders";
  buildno = "6968";
in multiStdenv.mkDerivation rec {
  pname = "sourcemod";
  version = "1.11_${buildno}";

  src = fetchFromGitHub rec {
    inherit owner;
    repo = pname;
    rev = "13510eab809a98b6a62354fc9848641";
    fetchSubmodules = true;
    hash = "sha256-leV0Q7g5bnJljzQxv3z6t5p/1d9TxILPvIuSYuq8LmE=";
  };

  nativeBuildInputs = [ ambuild ed ];
  buildInputs = [ zlib mysql_5_5 ];

  hardeningDisable = [ "all" ];

  CXXFLAGS="-Wno-error=sign-compare -Wno-error=ignored-attributes";

  postPatch = ''
    mkdir .git
    echo "ref: refs/heads/main" > .git/HEAD
    ed tools/buildbot/generate_headers.py <<EOF
    /^def get_git_version/;/return/a
    def get_git_version():
      return '${buildno}', '${builtins.substring 0 7 src.rev}', '${src.rev}'
    .
    w
    EOF
    for i in sdktools dhooks sdkhooks; do
      sed -i '/invalid-offsetof/s,no-,no-error=,' extensions/$i/AMBuilder
    done
    ed AMBuildScript <<EOF
    /'mathlib.a'/s|$|, '${libfinite}',|
    w
    EOF
  '';

  configurePhase = ''
    ln -s ${hl2sdk} ${hl2sdk.name}
    ln -s ${metamod-source}/include metamod-source
    mkdir -p build
    cd build
    python ../configure.py --sdks present --mysql-path ${mysql_5_5}
  '';    

  buildPhase = ''
    ambuild
  '';

  installPhase = ''
    mkdir $out
    mv package $out/share
    cd $out/share/addons/sourcemod/plugins
    mv *.smx disabled/
    mkdir -p $out/bin
    cd $out/bin
    cp ${writeShellScript "spcomp" ''
      echo OUT/share/addons/sourcemod/scripting/spcomp $SPCOMPFLAGS "$@"
      OUT/share/addons/sourcemod/scripting/spcomp $SPCOMPFLAGS "$@"
    ''} ./spcomp
    substituteInPlace ./spcomp --replace OUT "$out"
  '';
  
  setupHook = ./setup-hook.sh;

  meta = with lib; {
    description = "Source Engine scripting and administration";
    homepage = "https://github.com/${owner}/${pname}";
    platforms = platforms.unix;
    license = licenses.gpl3;
  };
}