anchor.diff:  , libxml2
   , pango
   , python
  +, systemd_lib
   , wayland
   , xorg
   
  
positive.code:     iso-codes
      libxml2
      pango
    ] ++ optionals (xorg != null) [
      xorg.libX11
      xorg.libXext
  
negative.code:     "--disable-debug-tools"
      "--disable-installed-tests"
      "--disable-always-build-tests"
      "--${boolEn (systemd_lib != null)}-udev"
      "--${boolEn (gobject-introspection != null)}-introspection"
      "--disable-gtk-doc"
      "--disable-gtk-doc-html"
  