{ stdenv, fetchurl, unzip, SDL, mesa, openal, curl }:
stdenv.mkDerivation rec {
  name = "urbanterror-${version}";
  version = "4.1";
  src1 = fetchurl {
    url = "http://ftp.snt.utwente.nl/pub/games/urbanterror/UrbanTerror_41_FULL.zip";
    sha256 = "0pr6xpwq8zllc0xsdxl8cfd0zz5fhggw5fsbrizygr6hhdvra1jp";
  };
  src2 = fetchurl {
    url = "http://ftp.snt.utwente.nl/pub/games/urbanterror/iourbanterror/source/complete/ioUrbanTerrorSource_2007_12_20.zip";
    sha256 = "1s1wq9m7shhvvk7s4400yrmz7dys501i4c9ln1mglc9dhmi8dmcn";
  };
  buildInputs = [ unzip SDL mesa openal curl ];
  unpackPhase = ''
    mkdir urbanterror
    cd urbanterror
    unzip $src1
    unzip $src2
  '';
  patches = [ ./l_script.patch ];
  patchPhase = ''
    for d in ioUrbanTerrorClientSource ioUrbanTerrorServerSource
    do
      cd "$d"
      patch -p 0 < "''${patches[0]}"
      cd ..
    done
  '';
  configurePhase = ''
    cd ioUrbanTerrorClientSource
    echo "USE_OPENAL = 1" > Makefile.local
    echo "USE_OPENAL_DLOPEN = 0" >> Makefile.local
    echo "USE_CURL = 1" >> Makefile.local
    echo "USE_CURL_DLOPEN = 0" >> Makefile.local
    substituteInPlace code/tools/asm/Makefile --replace -Werror ""
    cd ..
  '';
  buildPhase = ''
    for d in ioUrbanTerrorClientSource ioUrbanTerrorServerSource
    do
      cd $d
      make
      cd ..
    done
  '';
  installPhase = ''
    destDir="$out/opt/urbanterror"
    mkdir -p "$destDir"
    mkdir -p "$out/bin"
    cp -v ioUrbanTerrorClientSource/build/release-linux-*/ioUrbanTerror.* \
          "$destDir/ioUrbanTerror"
    cp -v ioUrbanTerrorServerSource/build/release-linux-*/ioUrTded.* \
          "$destDir/ioUrTded"
    cp -rv UrbanTerror/q3ut4 "$destDir"
    cat << EOF > "$out/bin/urbanterror"
    #!/bin/sh
    cd "$destDir"
    exec ./ioUrbanTerror "\$@"
    EOF
    chmod +x "$out/bin/urbanterror"
    cat << EOF > "$out/bin/urbanterror-ded"
    #!/bin/sh
    cd "$destDir"
    exec ./ioUrTded "\$@"
    EOF
    chmod +x "$out/bin/urbanterror-ded"
  '';
  postFixup = ''
    p=$out/opt/urbanterror/ioUrbanTerror
    cur_rpath=$(patchelf --print-rpath $p)
    patchelf --set-rpath $cur_rpath:${mesa}/lib $p
  '';
  meta = {
    description = "A multiplayer tactical FPS on top of Quake 3 engine";
    longDescription = ''
      Urban Terror is a free multiplayer first person shooter developed by
      FrozenSand, that (thanks to the ioquake3-code) does not require
      Quake III Arena anymore. Urban Terror can be described as a Hollywood
      tactical shooter; somewhat realism based, but the motto is "fun over
      realism". This results in a very unique, enjoyable and addictive game.
    '';
    homepage = http://www.urbanterror.net;
    license = [ "unfree-redistributable" ];
    maintainers = with stdenv.lib.maintainers; [ astsmtl ];
    platforms = with stdenv.lib.platforms; linux;
  };
}