The recent commit af5e4ef732faedf66c6dc1756432e9de2ac72988 broke the build:

https://pastebin.com/5tTYHd68

The do_package() step tries to chown the base-files/3.0.14-r89/package/usr directory to 0:0 uid/gid

I've tried to remove build/tmp and re-run several times. Fails with the same error. If I use the previous commit (36fe5df200a94e3ce82ba2dcad16c0a4127f6d46) it builds without any issues.