Changes summary:

In CMakeLists.txt:

add_compile_definitions(_DISABLE_CONSTEXPR_MUTEX_CONSTRUCTOR) Adds the define to the playlunky build (conan packages unaffected).

In cmake/conan.cmake:

tools.build:defines=["_DISABLE_CONSTEXPR_MUTEX_CONSTRUCTOR"] add the define to the packages that will be provided by connan

tools.info.package_id:confs=["tools.build:defines"] Makes conan to include the defines added to the package id of the used libraries, resulting in it not reusing cached packages that weren't built with the necessary define.

For the rest it's pretty self-explainatory

To make sure it won't cause a crash on the nightly, I enabled actions in my fork and tested it: https://github.com/estebanfer/Playlunky/releases/tag/nightly