How to enable C++20 module?

[Stevan1996]

Hi,

according to the README, the library can be used as a module with NLOHMANN_JSON_BUILD_MODULES. However, I cannot figure out how exactly this option should be enabled.
I installed the package via vcpkg, and I am using CMake in my project. I could not enable the module by adding set(NLOHMANN_JSON_BUILD_MODULES ON) or option(NLOHMANN_JSON_BUILD_MODULES "..." ON) to the CMakeLists.txt.
Did I misunderstand the usage of NLOHMANN_JSON_BUILD_MODULES?

[nlohmann]

MSVC does not yet support modules for this library. See #3970 (comment). There is a ticket at the Visual Studio folks, that should be fixed with the next release.