{ stdenv, fetchurl
, libX11, gettext, wxGTK
, libiconv, fontconfig, freetype
, mesa
, libass, fftw, ffms
, ffmpeg, pkgconfig, zlib # Undocumented (?) dependencies
, icu, boost, intltool # New dependencies
, spellChecking ? true, hunspell ? null
, automationSupport ? true, lua ? null
, openalSupport ? false, openal ? null
, alsaSupport ? true, alsaLib ? null
, pulseaudioSupport ? true, pulseaudio ? null
, portaudioSupport ? false, portaudio ? null
}:

assert spellChecking -> (hunspell != null);
assert automationSupport -> (lua != null);
assert openalSupport -> (openal != null);
assert alsaSupport -> (alsaLib != null);
assert pulseaudioSupport -> (pulseaudio != null);
assert portaudioSupport -> (portaudio != null);

stdenv.mkDerivation rec {
  name = "aegisub-${version}";
  version = "3.1.3";

  src = fetchurl {
    url = "http://ftp.aegisub.org/pub/releases/${name}.tar.xz";
    sha256 = "0n2y5cggayr8246p2cvrz0ajlhhvmzcgsp7nljnm21jypk15pspg";
  };

  nativeBuildInputs = [ intltool ];

  buildInputs = with stdenv.lib;
  [ libX11 gettext wxGTK libiconv fontconfig freetype mesa libass fftw ffms ffmpeg pkgconfig zlib icu boost ]
  ++ optional spellChecking hunspell
  ++ optional automationSupport lua
  ++ optional openalSupport openal
  ++ optional alsaSupport alsaLib
  ++ optional pulseaudioSupport pulseaudio
  ++ optional portaudioSupport portaudio
  ;

  NIX_LDFLAGS = "-liconv -lavutil -lavformat -lavcodec -lswscale -lz -lm -lGL";

  configureFlags = "--with-boost-libdir=${boost}/lib/";

  postInstall = "ln -s $out/bin/aegisub-* $out/bin/aegisub";

  meta = with stdenv.lib; {
    description = "An advanced subtitle editor";
    longDescription = ''
      Aegisub is a free, cross-platform open source tool for creating and
      modifying subtitles. Aegisub makes it quick and easy to time subtitles to
      audio, and features many powerful tools for styling them, including a
      built-in real-time video preview.
    '';
    homepage = http://www.aegisub.org/;
    license = licenses.bsd3;
              # The Aegisub sources are itself BSD/ISC,
              # but they are linked against GPL'd softwares
              # - so the resulting program will be GPL
    maintainers = [ maintainers.AndersonTorres ];
    platforms = platforms.linux;

  };
}