This address is for apt, not for people. The applications, and
what they do, are at buache.systems.
sudo install -d -m 0755 /etc/apt/keyrings
curl -fsSL https://apt.buache.systems/buache-systems-archive-keyring.gpg \
| sudo tee /etc/apt/keyrings/buache-systems.gpg > /dev/null
sudo curl -fsSL -o /etc/apt/sources.list.d/buache-systems.sources \
https://apt.buache.systems/buache-systems.sources
sudo apt update