That Vermont Curry information page:

Nutrition Facts
Serving Size: 1/12 package(21g)
Servings per Container: 12

Good to know that eating the entire 250g package will give me just 420% of the recommended daily sodium intake.

Actually the contents are sealed in two separate packets, 6 servings each, so you don't have to cook the whole box all at once. (Granted, it's still a lot if you're cooking for just a couple of people.)