{
  mkDerivation,
  lib,
  extra-cmake-modules,
  kdoctools,
  breeze-icons,
  chmlib,
  discount,
  djvulibre,
  ebook_tools,
  kactivities,
  karchive,
  kbookmarks,
  kcompletion,
  kconfig,
  kconfigwidgets,
  kcoreaddons,
  kdbusaddons,
  kdegraphics-mobipocket,
  kiconthemes,
  kjs,
  khtml,
  kio,
  kparts,
  kpty,
  kpurpose,
  kwallet,
  kwindowsystem,
  libkexiv2,
  libspectre,
  libzip,
  phonon,
  poppler,
  qca-qt5,
  qtdeclarative,
  qtsvg,
  threadweaver,
  kcrash,
  withSpeech ? true,
  qtspeech,
  qtx11extras,
}:

mkDerivation {
  pname = "okular";

  nativeBuildInputs = [
    extra-cmake-modules
    kdoctools
  ];

  buildInputs = [
    breeze-icons
    discount
    djvulibre
    ebook_tools
    kactivities
    karchive
    kbookmarks
    kcompletion
    kconfig
    kconfigwidgets
    kcoreaddons
    kdbusaddons
    kdegraphics-mobipocket
    kiconthemes
    kjs
    khtml
    kio
    kparts
    kpty
    kpurpose
    kwallet
    kwindowsystem
    libkexiv2
    libspectre
    libzip
    phonon
    poppler
    qca-qt5
    qtdeclarative
    qtsvg
    threadweaver
    kcrash
    chmlib
    qtx11extras
  ] ++ lib.optional withSpeech qtspeech;

  # InitialPreference values are too high and end up making okular
  # default for anything considered text/plain. Resetting to 1, which
  # is the default.
  postPatch = ''
    substituteInPlace generators/txt/okularApplication_txt.desktop \
      --replace InitialPreference=3 InitialPreference=1
  '';

  cmakeFlags = lib.optional (!withSpeech) "-DFORCE_NOT_REQUIRED_DEPENDENCIES=Qt5TextToSpeech";

  meta = with lib; {
    homepage = "http://www.kde.org";
    description = "KDE document viewer";
    mainProgram = "okular";
    license = with licenses; [
      gpl2Plus
      lgpl21Plus
      fdl12Plus
      bsd3
    ];
    maintainers = with maintainers; [ ttuegel ];
    platforms = lib.platforms.linux;
  };
}