package: xenomai-kernel-source version: 2.6.4+dfsg-1 severity: grave Hi,
The kernel patches shipped in xenomai-kernel-source haven't been updated in a long time, so they won't work with any kernel shipped in buster. Please note that the package description mentions patches for a 2.6 kernel, but the readme mentions newer kernels (3.x), so the description is probably outdated. Still, buster will not ship with a 3.x kernel. Cheers, Ivo