Your kernel headers for kernel 6.1.21-v8+ cannot be found and service failed to start

[Darkcast]

im running bullseye armhf lite

Linux Phoniebox 6.1.21-v8+ #1642 SMP PREEMPT Mon Apr  3 17:24:16 BST 2023 aarch64 GNU/Linux

when the install escript finishes I get the error

Your kernel headers for kernel 6.1.21-v8+ cannot be found at

full msg

Creating symlink /var/lib/dkms/wm8960-soundcard/1.0/source ->
                 /usr/src/wm8960-soundcard-1.0

DKMS: add completed.
Error! echo
Your kernel headers for kernel 6.1.21-v8+ cannot be found at
/lib/modules/6.1.21-v8+/build or /lib/modules/6.1.21-v8+/source.
You can use the --kernelsourcedir option to tell DKMS where it's located.
Created symlink /etc/systemd/system/sysinit.target.wants/wm8960-soundcard.service → /lib/systemd/system/wm8960-soundcard.service.
Job for wm8960-soundcard.service failed because the control process exited with error code.
See "systemctl status wm8960-soundcard.service" and "journalctl -xe" for details.
● wm8960-soundcard.service - WM8960 soundcard service
     Loaded: loaded (/lib/systemd/system/wm8960-soundcard.service; enabled; vendor preset: enabled)
     Active: failed (Result: exit-code) since Wed 2024-11-20 17:13:15 EST; 20ms ago
    Process: 2306 ExecStart=/usr/bin/wm8960-soundcard (code=exited, status=99)
   Main PID: 2306 (code=exited, status=99)
        CPU: 299ms

Nov 20 17:13:09 Phoniebox systemd[1]: Starting WM8960 soundcard service...
Nov 20 17:13:09 Phoniebox wm8960-soundcard[2306]: + exec
Nov 20 17:13:09 Phoniebox wm8960-soundcard[2307]: ++ basename /usr/bin/wm8960-soundcard
Nov 20 17:13:15 Phoniebox systemd[1]: wm8960-soundcard.service: Main process exited, code=exited, status=99/n/a
Nov 20 17:13:15 Phoniebox systemd[1]: wm8960-soundcard.service: Failed with result 'exit-code'.
Nov 20 17:13:15 Phoniebox systemd[1]: Failed to start WM8960 soundcard service.
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Please reboot your raspberry pi to apply all settings
Enjoy!
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any help would be greatly apreciated.