[Haskell-beginners] two System.IO.Strict modules

There are two modules called the same name: System.IO.Strict, documented respectively at http://hackage.haskell.org/packages/archive/strict-io/0.2.1/doc/html/System-... http://hackage.haskell.org/package/strict-0.3.2 My questions are: 1) Will these two modules coexist in the same version of GHC? Or put it another way, both modules' .tar.gz files have System/IO/Strict.hs inside, will they overlap in physical disk? From where can I tell which locations they will be installed to? 2) If yes, which module will "import System.IO.Strict" actually use?