Vagrant on WSL1 broken?


I have used vagrant on WSL1 (debian10) on Win10 for a couple of months when suddently it stopped working with message:

$ vagrant up
Vagrant failed to initialize at a very early stage:

The version of powershell currently installed on this host is less than
the required minimum version. Please upgrade the installed version of
powershell to the minimum required version and run the command again.

  Installed version: N/A
  Minimum required version: 3
 $ apt show vagrant
Package: vagrant
Version: 2.2.18
Priority: extra
Section: default
Maintainer: HashiCorp <>
Installed-Size: 117 MB
License: MIT
Vendor: HashiCorp
Download-Size: 41.5 MB
APT-Manual-Installed: yes
APT-Sources: buster/main amd64 Packages
Description: Vagrant is a tool for building and distributing development environments.

N: There are 10 additional records. Please use the '-a' switch to see them.

Any hints what’s going on?