cabal: question on compiling build prerequisites

[Henning Thielemann]

On Sat, 7 Dec 2013, Peter Selinger wrote:

> The preprocessor is essentially a 20-line Haskell program depending on
> Prelude. It's similar to the kind of ad-hoc programs that one might
> use within the "test" and "benchmark" targets.  So putting it in a
> separate package would be overkill, I think.

Maybe it can be done without a preprocessor? In this case the discussion 
would better fit to haskell-cafe. For Cabal discussions there is also
   http://www.haskell.org/mailman/listinfo/cabal-devel