I've just installed nhc 1.04, and tried to execute: hmake 1 -T in a directory containing file 1.hs: module Main where f = foldl (+) 0 main = print (f [1..10]) and I've got the following error message: [khaliff@90-mia-3 khaliff]$ hmake 1 -T nhc98 -T -c -o 1.T.o 1.hs nhc98 -T -o 1 1.T.o 1.T.o(.data+0x1a8): undefined reference to N_Prelude_46mkNTId' 1.T.o(.data+0x1b0): undefined reference to N_Prelude_46mkSR' 1.T.o(.data+0x1b8): undefined reference to N_Prelude_46mkTNm' 1.T.o(.data+0x1bc): undefined reference to F_Prelude_46mkTRoot' 1.T.o(.data+0x1e8): undefined reference to N_Prelude_46lazySat' 1.T.o(.data+0x310): undefined reference to N_Prelude_46mkNTId' 1.T.o(.data+0x318): undefined reference to N_Prelude_46mkSR' 1.T.o(.data+0x320): undefined reference to N_Prelude_46mkTNm' 1.T.o(.data+0x324): undefined reference to F_Prelude_46mkTRoot' 1.T.o(.data+0x364): undefined reference to N_Prelude_46lazySat' Wojciech Moczydlowski, Jr