Kernel module will not load the pcspkr module

Help
1

I am trying to get the command beep to work. It don’t work after a
nixos-rebuild switch, but if I manually make a modprobe pcspkr then I can get the
beep command to work.
I have tried to add it to the configuration file, but I get a error or it don’t work.

Here is some output from coomends.

modinfo pcspkr

filename: /run/booted-system/kernel-modules/lib/modules/6.1.27/kernel/drivers/input/misc/pcspkr.ko.xz
alias: platform:pcspkr
license: GPL
description: PC Speaker beeper driver
author: Vojtech Pavlik vojtech@ucw.cz
depends:
retpoline: Y
intree: Y
name: pcspkr
vermagic: 6.1.27 SMP preempt mod_unload

nixos-rebuild switch

building Nix…
building the system configuration…
error: undefined variable ‘pcspkr’

   at /etc/nixos/configuration.nix:18:65:

       17|
       18|   boot.extraModulePackages = with config.boot.kernelPackages; [ pcspkr ]; #  used by beep
         |                                                                 ^
       19|

(use ‘–show-trace’ to show detailed location information)

How do I get beep to work?
How do I load the module into the kernel via the config file?
PS. I am a newbie at NixOs.

2

Have been trying this too but nothing works.

boot.kernelModules = [ "pcspkr" ];
  # boot.initrd.availableKernelModules = [ "pcspkr" ];  
  # boot.extraModulePackages = with config.boot.kernelPackages; [ pcspkr ]; #  used by beep
  # boot.extraModulePackages = [ config.boot.kernelPackages.pcspkr ];
3

boot.kernelModules = [ "pcspkr" ]; should be what you want, but note that this only gets applied on boot, not during a configuration switch / nixos-rebuild switch.

4

Reboot do not work.

But poking around, I found this in /etc/modprobe.d

$ ls -ltr
total 0
lrwxrwxrwx 1 root root 36 May 11 00:55 firmware.conf -> /etc/static/modprobe.d/firmware.conf
lrwxrwxrwx 1 root root 33 May 11 00:55 nixos.conf -> /etc/static/modprobe.d/nixos.conf
lrwxrwxrwx 1 root root 34 May 11 00:55 debian.conf -> /etc/static/modprobe.d/debian.conf
lrwxrwxrwx 1 root root 35 May 11 00:55 systemd.conf -> /etc/static/modprobe.d/systemd.conf
lrwxrwxrwx 1 root root 34 May 11 00:55 ubuntu.conf -> /etc/static/modprobe.d/ubuntu.conf

$ grep -r pcspk *
ubuntu.conf:blacklist pcspkr

It seem like configuration from other distributions are being dumped into the modprobe.d directory. This break the idea that all configuration should be in the nixos configuration file.

5

How do I get the nixos-rebuild to not putting the ubuntu.conf into the the /etc/modprobe.d/ directory?

6

How does one tell the build package that beep depend on the pcspkr kernel module?