I have no experience with Haskero, but I can duplicate the problem with a simple old installation of Intero on a Linux machine.
, Intero stack exec stack ghci. , stack exec ghci stack ghci GHC (. stack ghci ).
stack exec intero :
stack ghci --with-ghc intero --no-build --no-load
.
( , stack exec intero , stack build , - stack ghci.)