1. I wrote this: -----8<----- test.hs --- module Main where import qualified Graphics.UI.GLFW as GLFW main = do True <- GLFW.initialize print =<< GLFW.openGLProfile print =<< GLFW.getGlfwVersion print =<< GLFW.getGlVersion print "Trying to open the window" result <- GLFW.openWindow GLFW.defaultDisplayOptions print result -----8<----- 2. Compiled like this: ghc --make -o test test.hs 3. Executed: ./test DefaultProfile Version {versionBranch = [2,7,2], versionTags = []} Version {versionBranch = [0,0,0], versionTags = []} "Trying to open the window" True 4. Window appeared. 2'. Executed in GHCI like this: ghci -fno-ghci-sandbox Prelude> :l test.hs Prelude> main 3'. Get (random numbers as GLVersion): Loading package GLFW-b-0.1.0.2 ... linking ... done. DefaultProfile Version {versionBranch = [2,7,2], versionTags = []} Version {versionBranch = *[34972080,-1323041296,-1334802519]*, versionTags = []} "Trying to open the window" False 4'. Window didn't appear. What should I do to get GLFW window in ghci too? What do I do wrong?