ncs 2.8.0 sysbuild BOARD and BOARD_QUALIFIERS not set

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?

Related