Windows Cygwin Toolchain make px4_sitl jmavsim CMake Error

make px4_sitl jmavsim
CMake Error at CMakeLists.txt:102 (cmake_minimum_required):
CMake 3.9 or higher is required. You are running version 3.6.2

my windows cmake is 3.27.1

why?

Need to install the Cygwin version of cmake in Cygwin