Hi. Trying to runhaskell following: import Graphics.UI.Gtk main = print "OK" I got GHCi runtime linker: fatal error: I found a duplicate definition for symbol locale_charset whilst processing object file /usr/local/lib/libintl.a This could be caused by: * Loading two different object files which export the same symbol * Specifying the same object file twice on the GHCi command line * An incorrect `package.conf' entry, causing some object to be loaded twice. GHCi cannot safely continue in this situation. Exiting now. Sorry. ghc works fine and creates working executable. In ghci "import Graphics.UI.Gtk" works too. What is the difference between runhaskell, ghci interactive and ghc linkers? ghc 7.6.3 running on OpenBSD. It is built from ports system with default patches. I don't see any patch that touches GHCi linker.