[...]
Getting dependencies for src/compiler98/RmClasses.hs.
ghc -i./src/compiler98 -idepends/cpphs -idepends/filepath -c src/compiler98/RmClasses.hs -o src/compiler98/RmClasses.o
Getting dependencies for src/compiler98/Derive/Derive.hs.
ghc -i./src/compiler98 -idepends/cpphs -idepends/filepath -c src/compiler98/Derive/Derive.hs -o src/compiler98/Derive/Derive.o
Getting dependencies for src/compiler98/FFITrans.hs.
ghc -i./src/compiler98 -idepends/cpphs -idepends/filepath -c src/compiler98/FFITrans.hs -o src/compiler98/FFITrans.o
Getting dependencies for src/compiler98/Depend.hs.
ghc -i./src/compiler98 -idepends/cpphs -idepends/filepath -c src/compiler98/Depend.hs -o src/compiler98/Depend.o
Getting dependencies for src/compiler98/ReportImports.hs.
ghc -i./src/compiler98 -idepends/cpphs -idepends/filepath -c src/compiler98/ReportImports.hs -o src/compiler98/ReportImports.o
Getting dependencies for src/compiler98/Compile.lhs.
ghc -i./src/compiler98 -idepends/cpphs -idepends/filepath -c src/compiler98/Compile.lhs -o src/compiler98/Compile.o
Getting dependencies for src/compiler98/Package.hs.
ghc -i./src/compiler98 -idepends/cpphs -idepends/filepath -c src/compiler98/Package.hs -o src/compiler98/Package.o
Getting dependencies for src/compiler98/Util/Graph.lhs.
ghc -i./src/compiler98 -idepends/cpphs -idepends/filepath -c src/compiler98/Util/Graph.lhs -o src/compiler98/Util/Graph.o
ghc -i./src/compiler98 -idepends/cpphs -idepends/filepath -c src/compiler98/Make.lhs -o src/compiler98/Make.o
Getting dependencies for src/compiler98/Main.hs.
ghc -i./src/compiler98 -idepends/cpphs -idepends/filepath -c src/compiler98/Main.hs -o src/compiler98/Main.o
Getting dependencies for src/compiler98/Derive/Eval.hs.
ghc -i./src/compiler98 -idepends/cpphs -idepends/filepath -c src/compiler98/Derive/Eval.hs -o src/compiler98/Derive/Eval.o
ghc src/compiler98/Make.o src/compiler98/Compile.o src/compiler98/Phase.o src/compiler98/Front.o src/compiler98/Bind.o src/compiler98/Case.o src/compiler98/CaseHelp.o src/compiler98/CaseLib.o src/compiler98/CaseOpt.o src/compiler98/Depend.o src/compiler98/Error.o src/compiler98/Export.o src/compiler98/Extract.o src/compiler98/FFITrans.o src/compiler98/FSLib.o src/compiler98/FixSyntax.o src/compiler98/Fixity.o src/compiler98/Flags.o src/compiler98/ForeignCode.o src/compiler98/FreeVar.o src/compiler98/IExtract.o src/compiler98/Id.o src/compiler98/IdKind.o src/compiler98/Import.o src/compiler98/ImportState.o src/compiler98/Info.o src/compiler98/IntState.o src/compiler98/Lift.o src/compiler98/Main.o src/compiler98/MkSyntax.o src/compiler98/NT.o src/compiler98/Need.o src/compiler98/NeedLib.o src/compiler98/Nice.o src/compiler98/Overlap.o src/compiler98/PosAtom.o src/compiler98/PosCode.o src/compiler98/PreImp.o src/compiler98/PreImport.o src/compiler98/PrettyLib.o src/compiler98/PrettySyntax.o src/compiler98/Prim.o src/compiler98/PrimCode.o src/compiler98/Reduce.o src/compiler98/Remove1_3.o src/compiler98/Rename.o src/compiler98/RenameLib.o src/compiler98/ReportImports.o src/compiler98/RmClasses.o src/compiler98/STGArity.o src/compiler98/Scc.o src/compiler98/SccModule.o src/compiler98/State.o src/compiler98/StateMonad.o src/compiler98/StrPos.o src/compiler98/Syntax.o src/compiler98/SyntaxPos.o src/compiler98/SyntaxUtil.o src/compiler98/SysDeps.o src/compiler98/TokenId.o src/compiler98/TokenInt.o src/compiler98/Package.o src/compiler98/Parse/Lex.o src/compiler98/Parse/LexLow.o src/compiler98/Parse/LexPre.o src/compiler98/Parse/LexStr.o src/compiler98/Parse/Lexical.o src/compiler98/Parse/Parse.o src/compiler98/Parse/Parse2.o src/compiler98/Parse/ParseCore.o src/compiler98/Parse/ParseI.o src/compiler98/Parse/ParseLex.o src/compiler98/Parse/ParseLib.o src/compiler98/Core/CoreType.o src/compiler98/Core/Core.o src/compiler98/Core/Pretty.o src/compiler98/DotNet/Compile.o src/compiler98/DotNet/IL.o src/compiler98/DotNet/Show.o src/compiler98/Derive/Derive.o src/compiler98/Derive/Binary.o src/compiler98/Derive/Bounded.o src/compiler98/Derive/Enum.o src/compiler98/Derive/Eq.o src/compiler98/Derive/Eval.o src/compiler98/Derive/Ix.o src/compiler98/Derive/Lib.o src/compiler98/Derive/Ord.o src/compiler98/Derive/Read.o src/compiler98/Derive/Show.o src/compiler98/Type/Type.o src/compiler98/Type/Ctx.o src/compiler98/Type/Data.o src/compiler98/Type/Env.o src/compiler98/Type/Lib.o src/compiler98/Type/Subst.o src/compiler98/Type/Unify.o src/compiler98/Type/Util.o src/compiler98/Util/Graph.o src/compiler98/Util/Text.o src/compiler98/Util/Extra.o src/compiler98/Util/MergeSort.o src/compiler98/Util/OsOnly.o src/compiler98/ByteCode/Analysis.o src/compiler98/ByteCode/Flatten.o src/compiler98/ByteCode/Graph.o src/compiler98/ByteCode/Peep.o src/compiler98/ByteCode/Relative.o src/compiler98/ByteCode/Show.o src/compiler98/ByteCode/Type.o src/compiler98/ByteCode/Wrap.o src/compiler98/ByteCode/Write.o src/compiler98/ByteCode/ByteCode.o src/compiler98/ByteCode/Compile.o src/compiler98/ByteCode/Metric.o src/compiler98/ByteCode/CompileLib.o depends/cpphs/Language/Preprocessor/Cpphs.o depends/cpphs/Language/Preprocessor/Unlit.o depends/cpphs/Language/Preprocessor/Cpphs/CppIfdef.o depends/cpphs/Language/Preprocessor/Cpphs/HashDefine.o depends/cpphs/Language/Preprocessor/Cpphs/MacroPass.o depends/cpphs/Language/Preprocessor/Cpphs/Position.o depends/cpphs/Language/Preprocessor/Cpphs/ReadFirst.o depends/cpphs/Language/Preprocessor/Cpphs/RunCpphs.o depends/cpphs/Language/Preprocessor/Cpphs/SymTab.o depends/cpphs/Language/Preprocessor/Cpphs/Tokenise.o depends/cpphs/Language/Preprocessor/Cpphs/Options.o depends/cpphs/Text/ParserCombinators/HuttonMeijer.o depends/filepath/System/FilePath.o -o inst/bin/yhc
gcc -I. -c -o src/runtime/BCKernel/external.o src/runtime/BCKernel/external.c
In file included from src/runtime/BCKernel/types.h:5,
                 from src/runtime/BCKernel/hashtable.h:4,
                 from src/runtime/BCKernel/module.h:18,
                 from src/runtime/BCKernel/external.h:4,
                 from src/runtime/BCKernel/external.c:1:
src/runtime/BCKernel/platform.h:103:17: ffi.h: No such file or directory
scons: *** [src/runtime/BCKernel/external.o] Error 1
scons: building terminated because of errors.