anchor.diff:  , docutils
   , doxygen
   , graphviz
  -, valgrind
   , glib
   , dbus
   , alsa-lib
  
positive.code: , makeFontsConf
  , callPackage
  , nixosTests
  , withMediaSession ? true
  , libcameraSupport ? true
  , libcamera
  
negative.code:     ++ lib.optionals bluezSupport [ bluez libfreeaptx ldacbt sbc fdk_aac ]
      ++ lib.optional pulseTunnelSupport libpulseaudio
      ++ lib.optional zeroconfSupport avahi;
  
      # Valgrind binary is required for running one optional test.
      checkInputs = lib.optional withValgrind valgrind;
  
      mesonFlags = [
        "-Ddocs=enabled"
  