After the last upgrade I cannot build any AUR package due to
fatal error: linux/limits.h: No such file or directory
and similar errors that looks like missing kernel headers. However headers are installed:
uname -a
Linux pure 6.12.63-1-MANJARO #1 SMP PREEMPT_DYNAMIC Thu, 18 Dec 2025 13:46:28 +0000 x86_64 GNU/Linux
pacman -Q linux612-headers
linux612-headers 6.12.63-1