Quickstart for Testing - xobs/ws2812b-catcher GitHub Wiki
This results in a failed build, but is useful for testing to see if lxbuildenv works:
git clone https://github.com/xobs/ws2812b-catcher.git
cd ws2812b-catcher
python3 ws2812b-catcher.py --lx-ignore-deps
if [ -e build/top.v ]; then echo "lxbuildenv works"; else echo "lxbuildenv failed"; fi