With the following .hs: ==<--TestPrettyPrintLeijen.hs--> module TestPrettyPrintLeijen where -- import Text.PrettyPrint.Leijen {- Above import causes error message: TestPrettyPrintLeijen.hs:3:7: Could not find module `Text.PrettyPrint.Leijen': Use -v to see a list of the files searched for. -} import Debug.QuickCheck.Batch {- Above import based on exposed-modules: section of: /usr/lib/ghc-6.12.1/package.conf.d/QuickCheck-1.2.0.0.conf However: ghci TestPrettyPrintLeijen.hs produces error: TestPrettyPrintLeijen.hs:9:7: Could not find module `Debug.QuickCheck.Batch': It is a member of the hidden package `QuickCheck-1.2.0.0'. Use -v to see a list of the files searched for. -} import GHC.Paths {- Above import based on exposed-modules: section of: http://hackage.haskell.org/packages/archive/ghc-paths/0.1.0.8/ghc-paths.caba... -} == ghc still fails to find the QuickCheck as shown by: ==<--ghci run--> $ sudo ghc-pkg expose QuickCheck-1.2.0.0 $ ghci TestPrettyPrintLeijen.hs GHCi, version 6.12.1: http://www.haskell.org/ghc/ :? for help Loading package ghc-prim ... linking ... done. Loading package integer-gmp ... linking ... done. Loading package base ... linking ... done. TestPrettyPrintLeijen.hs:9:7: Could not find module `Debug.QuickCheck.Batch': It is a member of the hidden package `QuickCheck-1.2.0.0'. Use -v to see a list of the files searched for. Failed, modules loaded: none. Prelude> == How does one enable import of a module from some package? TIA. -regards, Larry