uname -r doesn't match ls /lib/modules

Windows Build Number

10.0.19043.1023

WSL Version

• WSL 2
• WSL 1

Kernel Version

5.10.16.3-microsoft-standard-WSL2

Distro Version

Ubuntu-20.04 LTS

Other Software

apt
modprobe
ddcci-dkms

Repro Steps

1. Update kernel with sudo apt update; sudo apt upgrade or an update package
2. Try:

• ls /lib/modules
• sudo apt install ddcci-dkms
• modprobe <any module>

Expected Behavior

• ls /lib/modules should show a folder with the currently installed kernel version as its name
• sudo apt install ddcci-dkms should install the modules to the correct directory
• modprobe should work

Actual Behavior

• ls /lib/modules:

5.4.0-73-generic  5.4.0-74-generic

• sudo apt install ddcci-dkms

Setting up ddcci-dkms (0.3.3-1) ...
Loading new ddcci-0.3.3 DKMS files...
BACKLIGHT_CLASS_DEVICE disabled in this kernel, not building module.
It is likely that 5.10.16.3-microsoft-standard-WSL2 belongs to a chroot's host
Building for 5.4.0-73-generic and 5.4.0-74-generic
Module build for kernel 5.4.0-73-generic was skipped since the
kernel headers for this kernel does not seem to be installed.
Building initial module for 5.4.0-74-generic
Done.

ddcci.ko:
Running module version sanity check.
 - Original module
   - No original module exists within this kernel
 - Installation
   - Installing to /lib/modules/5.4.0-74-generic/updates/dkms/

ddcci-backlight.ko:
Running module version sanity check.
 - Original module
   - No original module exists within this kernel
 - Installation
   - Installing to /lib/modules/5.4.0-74-generic/updates/dkms/

depmod...

DKMS: install completed.

• modprobe ddcci-backlight

modprobe: FATAL: Module ddcci-backlight not found in directory /lib/modules/5.10.16.3-microsoft-standard-WSL2

Diagnostic Logs

No response

The report names no source files or tests. Start by reproducing the mismatch with uname -r, ls /lib/modules, DKMS installation, and modprobe; trace how WSL exposes the kernel version and module directory, then verify that DKMS and modprobe use the same version.