Cannot run local backend development with Yarn 3

[paulm17]

I'm getting:

Failed to parse "sanitized" output of "yarn workspaces info" command.

When running medusa-dev. Running yarn version 3.5.0.

Additionally, the global param has been removed from Yarn. So with later than 2.x the correct usage is yarn dlx, which runs it in a temp env and thus downloads it all the time. Which is tiring to say the least! Anyway, using npm side steps this, but I still get the same result.