linux-headers-6.8.12-common-rt - 6.8.12-1 main

This package provides the common kernel header files for Linux kernel
version 6.8.12 with the PREEMPT_RT featureset, generally used for building
out-of-tree kernel modules. These files are going to be installed into
/usr/src/linux-headers-6.8.12-common-rt.
.
To obtain a complete set of headers you also need to install the
linux-headers-6.8.12-(flavour) package, matching the flavour of the kernel
you intend the build for.