Can't list or uninstall global packages

[FlanderJam]

Hello!

I'm running into some issues with NVM4W and am hoping to get some help.

Build Info:

• OS: Windows 10 Pro
• OS Version: 20H2
• OS Build: 19042.630
• NVM Version: 1.1.7

When I run nvm install latest

• It successfully installs node v15.3.0 (at time of writing, though the problem was also encountered against v15.2.1)
• It successfully installs npm v7.0.14

When I run nvm use 15.3.0

• It appears to successfully establish the symlink
• node commands appear to work
• npm commands appear to work

However, if I try to install a package globally: npm install -g typescript for example

• The package appears to be installed and can be viewed in the nvm node home and in the nodejs symlink folder
• Running npm list -g returns empty. It's as if it doesn't recognize typescript is installed.
• Running npm uninstall -g typescript also fails to remove the global module.
• This is happening for any package installed globally
• Running tsc --version will still return the newly installed version number for typescript

Should npm be able to install and uninstall packages globally? Should these packages appear when running commands like npm list -g?

[coreybutler]

This is likely caused by an upstream issue. See #579.