[TxMt] interpreter failed: Permission denied error?

[Ian Duncan]

Hello all, I'm trying to make use of some external refactoring tools  
for Haskell, and I've written the following script:

#!/usr/local/bin/ runghc
import System.Cmd
where

main = do
	c <- getContents
	system ("/Users/ian/.cabal/bin/pointfree \"" ++ c ++ "\"")


Here's the problem:
Whenever I try to run the script, the output I get says "interpreter  
failed: Permission denied". Now, I'm pretty sure that the script  
execution fails even without executing the local program pointfree.  
Any ideas what I'm doing wrong?

-Ian Duncan