Tried to install http://hackage.haskell.org/cgi-bin/hackage-scripts/package/zlib which is required for http://darcs.haskell.org/cabal-branches/cabal-1.4 which is required for cabal-install. Got the following error. apt-get installed zlibc on a stab in the dark, but same result. advice? thartman@thartman-laptop:~/haskellInstalls/smallInstalls/cabal-install/zlib-0.4.0.4>runghc Setup.hs configure Configuring zlib-0.4.0.4... thartman@thartman-laptop:~/haskellInstalls/smallInstalls/cabal-install/zlib-0.4.0.4>runghc Setup.hs build &>out thartman@thartman-laptop:~/haskellInstalls/smallInstalls/cabal-install/zlib-0.4.0.4>head out Preprocessing library zlib-0.4.0.4... Stream.hsc:74:18: error: zlib.h: No such file or directory Stream.hsc: In function 'main': Stream.hsc:254:0: error: 'z_stream' undeclared (first use in this function) Stream.hsc:254:0: error: (Each undeclared identifier is reported only once thartman@thartman-laptop:~/haskellInstalls/smallInstalls/cabal-install/zlib-0.4.0.4>