Aliases combined with OS names do not work

[srflp]

I'm running pnpm watch-app on Windows with the following setup:

"watch-app": "run-script-os",
"watch-app:windows:macos": "echo 1",
"watch-app:default": "echo 2"

And it prints 2, but it should print 1 since I'm on Windows.

The simple fix is:

"watch-app": "run-script-os",
"watch-app:win32:macos": "echo 1",
"watch-app:default": "echo 2"

This prints 1.
The only difference is that I use OS name (win32) here instead of an alias (windows).

But it's not obvious that you cannot combine aliases with OS names and this should be either mentioned in the README or fixed so that aliases can be used together with OS names.