Running on a Raspberry Pi 4 Model B, Raspberry Pi OS 64 Lite
Error:
$ sudo apt-get install raspberrypi-kernel-headers
Reading package lists... Done
Building dependency tree... Done
Reading state information... Done
E: Unable to locate package raspberrypi-kernel-headers
Kernel:
$ uname -a
Linux test-rpi 6.1.55-v8+ #1686 SMP PREEMPT Thu Oct 5 15:47:38 BST 2023 aarch64 GNU/Linux
Sources:
$ cat /etc/apt/sources.list.d/raspi.list
deb http://archive.raspberrypi.com/debian/ bookworm main
# Uncomment line below then 'apt-get update' to enable 'apt-get source'
#deb-src http://archive.raspberrypi.com/debian/ bookworm main
More tests:
$ apt policy raspberrypi-kernel-headers
N: Unable to locate package raspberrypi-kernel-headers