anchor.diff:      pkg-config
       ninja
     ] ++ lib.optionals isCross [
  -    wayland # For wayland-scanner during the build
  +    wayland-scanner
     ] ++ lib.optionals withDocumentation [
       (graphviz-nox.override { pango = null; }) # To avoid an infinite recursion
       doxygen
  
positive.code:     docbook_xml_dtd_42
    ];
  
    meta = with lib; {
      description = "Core Wayland window system code and protocol";
      longDescription = ''
  
negative.code: , meson
  , pkg-config
  , ninja
  , wayland-scanner
  , expat
  , libxml2
  , withLibraries ? stdenv.isLinux
  