$ apt install luarocks
$ luarocks install luasec

$ brew install lua

• https://luarocks.org/ (https://github.com/luarocks/luarocks)

$ git clone https://github.com/Olivine-Labs/busted.git
$ luarocks install busted/busted-1.3-1.rockspec

or

$ git clone https://github.com/Olivine-Labs/busted.git
$ cd busted
$ luarocks make

$ luarocks remove  rockspecs/luasocket-async-scm-0.rockspec

• switch