I'm guessing Haskell and org-mode Babel aren't really a great match? After installing haskell-mode, I've tried
#+begin_src haskell
doubleMe x = x + x
#+end_src
which isn't working . . . because it isn't allowed in the ghci?
#+begin_src haskell
let doubleMe x = x + x
#+end_src
works. However,
#+begin_src haskell
let doubleSmallNumber4 x = if x > 0
then x
else x*2
#+end_src
complains of a parsing error on else. How does Haskell work in org mode?
LB