I've been having trouble getting yhc (devel) to compile on MacOS. I'm using: ghc 6.4, and gcc 4.0.1 I'm getting the following message: [...] Skipping Package ( ./Package.hs, ./Package.o ) Skipping Phase ( ./Phase.hs, ./Phase.o ) Skipping Front ( ./Front.lhs, ./Front.o ) Skipping Compile ( ./Compile.lhs, ./Compile.o ) Skipping Make ( ./Make.lhs, ./Make.o ) Skipping Main ( Main.hs, Main.o ) Linking ... make -C src/cpphs-1.0 ghc --make cpphs.hs -o ../../inst/bin/cpphs IChasing modules from: cpphs.hs Skipping ParseLib ( ./ParseLib.hs, ./ParseLib.o ) Skipping HashDefine ( ./HashDefine.hs, ./HashDefine.o ) Skipping SymTab ( ./SymTab.hs, ./SymTab.o ) Skipping Position ( ./Position.hs, ./Position.o ) Skipping Tokenise ( ./Tokenise.hs, ./Tokenise.o ) Skipping ReadFirst ( ./ReadFirst.hs, ./ReadFirst.o ) Skipping CppIfdef ( ./CppIfdef.hs, ./CppIfdef.o ) Skipping MacroPass ( ./MacroPass.hs, ./MacroPass.o ) Skipping RunCpphs ( ./RunCpphs.hs, ./RunCpphs.o ) Skipping Main ( cpphs.hs, cpphs.o ) Linking ... make -C src/packages/yhc-base-1.0 export YHC_BASE_PATH=../../../inst ; ../../../inst/bin/yhc -d ../../../inst/lib/yhc/packages/yhc-base/1.0/ -i ../../../inst/lib/yhc/packages/yhc-base/1.0/ -c System/Exit.hs yhc: Error: File not found, Data.Ratio Looked in: ../../../inst/lib/yhc/packages/yhc-base/1.0 make[1]: *** [../../../inst/lib/yhc/packages/yhc-base/1.0//System/Exit.hi] Error 1 make: *** [yhc-base] Error 2