Thanks Max. That makes a lot of sense. That change got me to the point of linking lambdabot. I then encountered this error: Linking dist/build/lambdabot/lambdabot ... Undefined symbols: "_iconv_open", referenced from: _hs_iconv_open in libHSbase-4.2.0.2.a(iconv.o) (maybe you meant: _hs_iconv_open) "_iconv", referenced from: _hs_iconv in libHSbase-4.2.0.2.a(iconv.o) (maybe you meant: _hs_iconv_open, _hs_iconv , _hs_iconv_close ) "_iconv_close", referenced from: _hs_iconv_close in libHSbase-4.2.0.2.a(iconv.o) (maybe you meant: _hs_iconv_close) Let's see if I'm catching on. From herehttp://osdir.com/ml/haskell-cafe@haskell.org/2010-09/msg00489.htmland here http://stackoverflow.com/questions/2726248/ghc-6-12-and-macports, I learned I have iconv from my Mac and iconv from MacPorts, but the solutions didn't work, and didn't really make sense to me. readline is compiled with iconv from MacPorts, and base is compiled with iconv from my Mac, and they're slightly different. How do I fix this? Can I tell readline to use my Mac's iconv even though I installed it with MacPorts?