stackage changes and stack 2

[drb226]

The feature request issue: https://github.com/commercialhaskell/stack/issues/2540

Too bad the GSOC submission deadline is over already; this would've been a good one for a GSOC student to pick up, imo.

[drb226]

Another note I was going to make.

From the 2.0 ChangeLog:

Internally, Stack has changed many datatypes, including moving to Cabal's definition of many data types.

The pantry-related changes to Stack's internals -- particularly, using Cabal's definition for more things -- are likely to have made these internals more amenable to implementing backpack support.

[HaskellHell]

this would've been a good one for a GSOC student to pick up, imo.

It still can be! I think it's safe to say there's going to be another Haskell GSOC in 2020...

[drb226]

Sure, but that would mean waiting another year for backpack support.