Installing `kali-win-kex` on WSL2 fails

I tried installing Kali-Win-Kex by following [the official guide](https://www.kali.org/docs/wsl/win-kex/) .

$ sudo apt install kali-win-kex -y
    dpkg: error processing archive /var/cache/apt/archives/kali-win-kex_2.7_amd64.deb (--unpack):
     new kali-win-kex package pre-installation script subprocess returned error exit status 1
    Errors were encountered while processing:
     /var/cache/apt/archives/kali-win-kex_2.7_amd64.deb
    E: Sub-process /usr/bin/dpkg returned an error code (1)

Trying apt install -f solve the problem changes package status from half-installed to uninstalled. Trying to install the package directly leads to the following error:

$ sudo dpkg -i /var/cache/apt/archives/kali-win-kex_2.7_amd64.deb
(Reading database ... 102450 files and directories currently installed.)
Preparing to unpack .../kali-win-kex_2.7_amd64.deb ...
This package is for WSL 2. Nothing to be done here.
dpkg: error processing archive /var/cache/apt/archives/kali-win-kex_2.7_amd64.deb (--install):
 new kali-win-kex package pre-installation script subprocess returned error exit status 1
Errors were encountered while processing:
 /var/cache/apt/archives/kali-win-kex_2.7_amd64.deb

How can I install kali-win-kex?

Windows version: 19042.746
Kali version: 2020.4 (kali-rolling)