anchor.diff:      "-DENABLE_INTROSPECTION=ON"
       "-DPORT=GTK"
       "-DUSE_LIBHYPHEN=OFF"
  -    "-DUSE_WPE_RENDERER=OFF"
     ] ++ optionals stdenv.isDarwin [
       "-DENABLE_GRAPHICS_CONTEXT_3D=OFF"
       "-DENABLE_GTKDOC=OFF"
  
positive.code: , xdg-dbus-proxy
  , substituteAll
  , glib
  }:
  
  assert enableGeoLocation -> geoclue2 != null;
  
negative.code:     libsecret
      libtasn1
      libwebp
      libwpe
      libwpe-fdo
      libxkbcommon
      libxml2
      libxslt
  