Error while compiling arducopter by ./waf

I can successfully compile arducopter in previous code base by ‘make px4-v2’. As arducopter community has entirely transitioned from make to waf, I tried that in waf. I’ve installed all prerequisite packages, but while compiling arducopter, I got the error:

[ 0%] Generating romfs.o
Error copying directory from “/Users/Documents/workspace/ardupilot/build/px4-v2/modules/PX4Firmware/src/firmware/nuttx/extras” to “/Users/Documents/workspace/ardupilot/build/px4-v2/modules/PX4Firmware/tmp/custom-ROMFS/extras”.

Is there anyone know how to solve it? Thanks

change the category to “development team” because this was showing up on the front page of because it was in the “Blog” category.

Good, sorry for inconvenience.