Re: [Haskell-cafe] Fwd: Fwd: Compatibility etiquette for apps, with cabal sandboxes and `stack`

Here is an allegory: There is Toyota 1985 and Toyota 2010. Although they both are Toyotas, they may be very different cars. ads show cars by brand, model and year, because brand alone is rarely enough. So why not spell this out in code? Why dump this task on tools which can not really tell what importing code actually requires?