Initializing a project with a literate Main file does not compile

Initializing a project with a literate Main file does not compile. Cabal writes the same content for both a `Main.hs` and a `Main.lhs` file. Could we extend cabal such that it generates a valid `Main.lhs` file?

e.g. 
```
> module Main where

> main :: IO ()
> main = putStrLn "Hello, Haskell!"
```