compile for both x86_64 and arm64 HELP!!!

[petrasvestartas]

How do you setup the CMakeLists of Nanobind to build both for x86_64 and arm64 ?

Whatever I do it builds for x86_64 only...

I am doing this which has no effect:

set(CMAKE_OSX_DEPLOYMENT_TARGET "10.15" CACHE STRING "Minimum OS X deployment version")
set(CMAKE_OSX_ARCHITECTURES "x86_64;arm64" CACHE STRING "Build architectures for Mac OS X")