(CMake Error in CMakeLists.txt:
  The target named "nocxx20" has C\+\+ sources that use modules, but does not
  include "cxx_std_20" \(or newer\) among its `target_compile_features`; found
  "cxx_std_17"\.
|CMake Error in CMakeLists.txt:
  The target named "nocxx20" has C\+\+ sources that may use modules, but
  modules are not supported by this generator\.  See the cmake-cxxmodules\(7\)
  manual and the CMAKE_CXX_SCAN_FOR_MODULES variable\.
)