[Yhc] "Data/Ratio" yhi error on macos X

Hi, Yhc / yhi compiles and installs on my system, but if you try to compile a simple Haskell program like this: main = putStrLn $ show (2+3) executing the bytecode file with yhi gives you this error: ERROR: couldn't find module named 'Data/Ratio' tried: Data/Ratio.hbc /Users/mike/Compile/yhc-devel/inst/lib/yhc/packages/yhc-base/1.0/Data/Ratio.hbc However, this program *will* compile and run correctly: main = putStrLn "hello, world!" This still happens if I get and compile fresh copy of yhc-devel from darcs, so I don't think my repo has been corrupted or anything. Mike.