Several months back, Arch Linux migrated to GIT, and part of that change eliminated the Community repo. ( See: https://archlinux.org/news/git-migration-completed/ )

This changeover required upgrading to a newer version of pacman than what is provided in ArchWSL. Unfortunately, at this point, the version of Pacman provided by a fresh install of this WSL distro is too old to get packages, which prevents installing anything not present in the base system.

To Reproduce
Install a fresh copy of Arch WSL and try to do anything with pacman.

Expected behavior
We should be able to get packages.