My repository
For mesa add https://sobkas.github.io/debian_mesa.list to /etc/apt/sources.list.d/
For openxray add https://sobkas.github.io/debian_openxray.list to /etc/apt/sources.list.d/
Add https://sobkas.github.io/key3.asc to /etc/apt/trusted.gpg.d/
This is experimental repo with main git Mesa + stuff