anchor.diff:  
       mesonFlags = [
         "-Ddocs=enabled"
  -      "-Dman=disabled" # we don't have xmltoman
         "-Dexamples=${mesonEnable withMediaSession}" # only needed for `pipewire-media-session`
         "-Dudevrulesdir=lib/udev/rules.d"
         "-Dinstalled_tests=enabled"
  
positive.code: , ninja
  , systemd
  , pkg-config
  , doxygen
  , graphviz
  , valgrind
  
negative.code:     ];
  
      nativeBuildInputs = [
        docutils
        doxygen
        graphviz
        meson
  