[Haskell-cafe] Question, re: upgrading Stack manually.

Hi Stackers, Is this a show stopper, wrt/ upgrading Stack manually, via: - stack unpack stack-1.1.2 - pushed - stack setup - stack build Warning: /Users/dbanas/Documents/Projects/stack/upgrade_2016-07-27/stack-1.1.2/stack.yaml: Unrecognized field in ProjectAndConfigMonoid: nix ? Thanks, -db