export PATH=~/Library/Python/3.9/bin:$PATH
export GNUARMEMB_TOOLCHAIN_PATH=/usr/local
export ZEPHYR_TOOLCHAIN_VARIANT=gnuarmemb
west build app -d build/left -b nice_nano_v2 -- -DSHIELD=corne_left
west build app -d build/right -b nice_nano_v2 -- -DSHIELD=corne_right