Build Slate with --verbose

[nam99tc]

Hello I'm a newbie.
In my project i run build below. It same in this docs: https://github.com/slatedocs/slate/wiki/Using-Slate-in-Docker

docker run --rm --name slate -v $(pwd)/build:/srv/slate/build -v $(pwd)/source:/srv/slate/source slatedocs/slate build

When i build it has 2 file error.
How can i build it with option --verbose.
I try add same this:
docker run --rm --name slate -v $(pwd)/build:/srv/slate/build -v $(pwd)/source:/srv/slate/source slatedocs/slate middleman build --verbose but it not work.
Thanks all.