ALUT fails to build on Mac OS X
Sound.ALUT (126.96.36.199) does not build on Mac OS X: It misses the C header file
After some googling I think that the reason is that Apple removed(!) this file from the OpenAL framework, see http://developer.apple.com/qa/qa2006/qa1504.html .
Sound.OpenAL builds fine, but seems to be unusable without ALUT.
Also, Christian Maeder's binary distribution of GHC 6.8.2 for Mac OS X 10.4 (Tiger) Intel seems to miss the Sound.ALUT library (but contains Sound.OpenGL); I would guess that the reason is the same.