CMake 3.28.0-rc5: xros is not an visionOS SDK

Hi,

I’m testing CMake for visionOS but I got the following error:

CMake Error at /Users/runner/hostedtoolcache/cmake/3.28.0/x64/cmake-3.28.0-rc5-macos-universal/CMake.app/Contents/share/cmake-3.28/Modules/Platform/visionOS-Initialize.cmake:4 (message):
  xros is not an visionOS SDK

Does anyone know how to fix this?