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