I think that the following X11 issues relate to xmonad. At least indirectly. :) 1. There is $USER variable in X11/README commands. Is this a typo? Shouldn't $HOME be used instead? 2. cd X11 && Setup.hs configure --help Nothing is said about `--without-xinerama' option. 3. There are even more warnings when building without Xinerama: $ runhaskell Setup.hs build ! Setup.hs: Warning: Unknown field 'build-type' Preprocessing library X11-1.3.0... Building X11-1.3.0... [ 1 of 17] Compiling Graphics.X11.Xlib.Types ( Graphics/X11/Xlib/Types.hs, dist/build/Graphics/X11/Xlib/Types.o ) [ 2 of 17] Compiling Graphics.X11.Types ( Graphics/X11/Types.hs, dist/build/Graphics/X11/Types.o ) [ 3 of 17] Compiling Graphics.X11.Xlib.Atom ( Graphics/X11/Xlib/Atom.hs, dist/build/Graphics/X11/Xlib/Atom.o ) [ 4 of 17] Compiling Graphics.X11.Xlib.Color ( Graphics/X11/Xlib/Color.hs, dist/build/Graphics/X11/Xlib/Color.o ) [ 5 of 17] Compiling Graphics.X11.Xlib.Context ( Graphics/X11/Xlib/Context.hs, dist/build/Graphics/X11/Xlib/Context.o ) [ 6 of 17] Compiling Graphics.X11.Xlib.Display ( Graphics/X11/Xlib/Display.hs, dist/build/Graphics/X11/Xlib/Display.o ) [ 7 of 17] Compiling Graphics.X11.Xlib.Event ( Graphics/X11/Xlib/Event.hs, dist/build/Graphics/X11/Xlib/Event.o ) [ 8 of 17] Compiling Graphics.X11.Xlib.Font ( Graphics/X11/Xlib/Font.hs, dist/build/Graphics/X11/Xlib/Font.o ) [ 9 of 17] Compiling Graphics.X11.Xlib.Misc ( Graphics/X11/Xlib/Misc.hs, dist/build/Graphics/X11/Xlib/Misc.o ) [10 of 17] Compiling Graphics.X11.Xlib.Region ( Graphics/X11/Xlib/Region.hs, dist/build/Graphics/X11/Xlib/Region.o ) [11 of 17] Compiling Graphics.X11.Xlib.Screen ( Graphics/X11/Xlib/Screen.hs, dist/build/Graphics/X11/Xlib/Screen.o ) [12 of 17] Compiling Graphics.X11.Xlib.Window ( Graphics/X11/Xlib/Window.hs, dist/build/Graphics/X11/Xlib/Window.o ) [13 of 17] Compiling Graphics.X11.Xlib.Image ( Graphics/X11/Xlib/Image.hs, dist/build/Graphics/X11/Xlib/Image.o ) [14 of 17] Compiling Graphics.X11.Xlib ( Graphics/X11/Xlib.hs, dist/build/Graphics/X11/Xlib.o ) [15 of 17] Compiling Graphics.X11.Xlib.Extras ( Graphics/X11/Xlib/Extras.hs, dist/build/Graphics/X11/Xlib/Extras.o ) ! Warning: orphan instances: instance base:GHC.Read.Read [X11-1.3.0:Graphics.X11.Xlib.Types.Rectangle] = $f1 [16 of 17] Compiling Graphics.X11.Xinerama ( Graphics/X11/Xinerama.hs, dist/build/Graphics/X11/Xinerama.o ) ! Graphics/X11/Xinerama.hsc:28:0: Warning: Module `Foreign' is imported, but nothing from it is used, except perhaps instances visible in `Foreign' To suppress this warning, use: import Foreign() [17 of 17] Compiling Graphics.X11 ( Graphics/X11.hs, dist/build/Graphics/X11.o ) /usr/bin/ar: creating dist/build/libHSX11-1.3.0.a Thank you. -- vvv