I'm migrating an nRF52840 project from ncs 2.7.0 to ncs 2.8.0. We pass the board in to the west build command line. Our CMakeLists.txt uses the BOARD & BOARD_QUALIFIERS to set variables for the build. This works in 2.7.0. In 2.8.0 it uses sysbuild by default and BOARD & BOARD_QUALIFIERS are not set. Is that expected? If so how can we determine the board in the CMakeLists.txt?