Solution to yarn global add does not work on Windows (command not found)

yarn-env-bars.ps1

$yarnPath = & yarn global bin
$path = [System.Environment]::GetEnvironmentVariable("PATH", [System.EnvironmentVariableTarget]::User)
[System.Environment]::SetEnvironmentVariable("PATH", "$path;$yarnPath", [System.EnvironmentVariableTarget]::User)

# Your yarn path should appear at the end of the path now
[System.Environment]::GetEnvironmentVariable("PATH", [System.EnvironmentVariableTarget]::User)

# Try a global command, for example gatsby. If you're using Visual Studio Code, you'll need to restart the IDE
gatsby