Setting GHCi prompt inside multiline blocks

GHCi's prompt can be set as follows, which is in my `.ghci`: ``` :set prompt "λ> " ``` However, a different prompt appears in multiline blocks, and I can't figure out how to change it. It is completely unreadable if too many modules are imported: ``` λ> :{ Prelude Control.Arrow Control.Applicative Control.Monad Control.Concurrent Control.Concurrent.Async Control.Parallel Data.String Data.Char Data.List Data.Maybe Data.Monoid Control.Monad.IO.Class| ``` Is there a way to set this secondary prompt? Alternatively, are there other good ways to run Haskell interactively where multiline expressions are displayed in a more friendly manner?