Install libghc-stmonadtrans-dev by entering the following commands in the terminal:
sudo apt update sudo apt install libghc-stmonadtrans-dev
Description:
monad transformer version of the ST monad
This package provides a monad transformer version of the ST monad. . Warning! This monad transformer should not be used with monads that can contain multiple answers, like the list monad. The reason is that the will be duplicated across the different answers and this cause Bad Things to happen (such as loss of referential transparency). Safe monads include the monads State, Reader, Writer, Maybe and combinations of their corresponding monad transformers. . This package provides a library for the Haskell programming language. See http://www.haskell.org/ for more information on Haskell.
Homepage: http://hackage.haskell.org/package/STMonadTrans
Version: 0.4.3-1
Section: universe/haskell