Package: mesaVersion: 18.2.1Building the package for stretch leads to a build failure due to an upstream bug Re: libxcb version issues.Bug is fixed in upstream as commit:dd333c66bdcb11c0d7c5 "vulkan: Disable randr lease for libxcb < 1.13"Upstream bug for reference: https://bugs.freedesktop.org/show_bug.cgi?id=108024If mesa 18.2.1 gets built for stretch-backports, you'll need to pull this commit in as a patch so it'll build. This commit hopefully should make it into 18.2.2.Hope this helps.--Stuart Young (aka Cefiar)