Платформа:
alt-server p11 x86_64 (Обновленный до Sisyphus)

Пакет:
update-kernel 1.24-alt1

Шаги:
# update-kernel --no-kernel

Результат: 
Устанавливает kernel-image, но не устанавливает kernel-headers

# update-kernel --no-kernel
Running kernel: kernel-image-6.12-6.12.33-alt1
Checking for available 6.12 kernel packages...
Latest available kernel is kernel-image-6.12-6.12.65-alt1
Kernel 6.12 version 6.12.65-alt1 has 41 external modules. Use -i to select which modules to install.
The following extra modules will be installed:
   (auto-selected) drm
Try to install kernel kernel-image-6.12-6.12.65-alt1 and 1 module [Y/n]? y
Reading Package Lists... Done
Building Dependency Tree... Done
The following extra packages will be installed:
  kernel-image-6.12#6.12.65-alt1:sisyphus+404817.100.1.1@1768158342
The following NEW packages will be installed:
  kernel-image-6.12#6.12.65-alt1:sisyphus+404817.100.1.1@1768158342  kernel-modules-drm-6.12#6.12.65-alt1:sisyphus+404817.100.1.1@1768158086
0 upgraded, 2 newly installed, 0 removed and 0 not upgraded.

Ожидаемый результат:
Устанавливает только kernel-headers