Hi, Try to setup GHC 7.8.2 & cabal 1.8 on Windows (7/64bits), using binary distributions from haskell.org I get error when I try to install glib package using cabal : cabal: Missing dependency on a foreign library: * Missing (or bad) header file: primitive-memops.h This problem can usually be solved by installing the system package that provides this library (you may need the "-dev" version). If the library is already installed but in a non-standard location then you can use the flags --extra-include-dirs= and --extra-lib-dirs= to specify where it is. If the header file does exist, it may contain errors that are caught by the C compiler at the preprocessing stage. In this case you can re-run configure with the verbosity flag -v3 to see the error messages. Failed to install primitive-0.5.2.1 cabal: Error: some packages failed to install: Command cabal install primitive raise the same error. I have tried either within cygwin or from plain cmd. Thanks for any hint, best.