# echo "deb http://deb.debian.org/debian sid main contrib non-free" > \
  /etc/apt/sources.list.d/deb-sid.list
# apt update
# apt install broadcom-sta-dkms wireless-tools
# dpkg-reconfigure broadcom-sta-dkms
# modprobe -r b44 b43 b43legacy ssb brcmsmac bcma
# modprobe wl