[Haskell-cafe] compile-time question

hello, I have added new function definitions to the namespace of an existing module. I did 1: runhaskell Setup.hs configure 2. runhaskell Setup.hs build 3) runhaskell Setup.hs install successfully so that a Linux .a(rchive) is installed. I write a small test case that references one of the new functions; however, when I build the test case, I get an "Out of scope" message indicated that at ghc(i) compile time the new function symbol cannot be found. Why? kind regards, Vasili