anchor.diff:  , makeFontsConf
   , callPackage
   , nixosTests
  +, withValgrind ? lib.meta.availableOn stdenv.hostPlatform valgrind
  +, valgrind ? null
   , withMediaSession ? true
   , libcameraSupport ? true
   , libcamera
  
positive.code: , docutils
  , doxygen
  , graphviz
  , valgrind
  , glib
  , dbus
  , alsa-lib
  
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"
  