*** setup configure Configuring serial-0.2.4... Dependency base >=2 && <4: using base-3.0.3.1 Dependency unix -any: using unix-2.3.2.0 Using Cabal-1.6.0.1 compiled by ghc-6.8 Using compiler: ghc-6.10.2 Using install prefix: /usr/local/tmp/archive/install Binaries installed in: /usr/local/tmp/archive/install/bin Libraries installed in: /usr/local/tmp/archive/install/lib/serial-0.2.4/ghc-6.10.2 Private binaries installed in: /usr/local/tmp/archive/install/libexec Data files installed in: /usr/local/tmp/archive/install/share/serial-0.2.4 Documentation installed in: /usr/local/tmp/archive/install/share/doc/serial-0.2.4 Using alex version 2.2 found on system at: /usr/bin/alex Using ar found on system at: /usr/bin/ar Using c2hs version 0.15.1 found on system at: /usr/local/bin/c2hs Using cpphs version 0.7 found on system at: /usr/bin/cpphs Using ffihugs found on system at: /usr/local/bin/ffihugs Using gcc version 4.3.3 found on system at: /usr/bin/gcc Using ghc version 6.10.2 found on system at: /usr/local/bin/ghc Using ghc-pkg version 6.10.2 found on system at: /usr/local/bin/ghc-pkg Using greencard found on system at: /usr/local/tmp/archive/install/bin/greencard Using haddock version 2.4.2 found on system at: /usr/local/bin/haddock Using happy version 1.17 found on system at: /usr/local/bin/happy No hmake found Using hsc2hs version 0.67 found on system at: /usr/local/bin/hsc2hs Using hscolour version 1.9 found on system at: /usr/local/bin/HsColour Using hugs found on system at: /usr/local/bin/hugs No jhc found Using ld found on system at: /usr/bin/ld No nhc98 found Using pkg-config version 0.22 found on system at: /usr/bin/pkg-config Using ranlib found on system at: /usr/bin/ranlib Using strip found on system at: /usr/bin/strip Using tar found on system at: /bin/tar *** setup build Creating dist/build (and its parents) Creating dist/build/autogen (and its parents) Preprocessing library serial-0.2.4... Building serial-0.2.4... Building library... Creating dist/build (and its parents) /usr/local/bin/ghc -package-name serial-0.2.4 --make -hide-all-packages -i -idist/build -i. -idist/build/autogen -Idist/build/autogen -Idist/build -optP-include -optPdist/build/autogen/cabal_macros.h -odir dist/build -hidir dist/build -stubdir dist/build -package base-3.0.3.1 -package unix-2.3.2.0 -O -Wall System.Serial System.Serial.Manager System.Serial.BlockingManager [1 of 3] Compiling System.Serial.BlockingManager ( System/Serial/BlockingManager.hs, dist/build/System/Serial/BlockingManager.o ) System/Serial/BlockingManager.hs:28:29: Couldn't match expected type `IO (MVar a)' against inferred type `String -> MVar a' In a stmt of a 'do' expression: mv <- newEmptyMVar In the expression: do mv <- newEmptyMVar forkIO $ process h mv timeout return mv In the definition of `serialManager': serialManager h timeout = do mv <- newEmptyMVar forkIO $ process h mv timeout return mv *** Trying again with preferred-versions *** setup configure Configuring serial-0.2.4... Dependency base >=2 && <4 && <4: using base-3.0.3.1 Dependency unix -any: using unix-2.3.2.0 Using Cabal-1.6.0.1 compiled by ghc-6.8 Using compiler: ghc-6.10.2 Using install prefix: /usr/local/tmp/archive/install Binaries installed in: /usr/local/tmp/archive/install/bin Libraries installed in: /usr/local/tmp/archive/install/lib/serial-0.2.4/ghc-6.10.2 Private binaries installed in: /usr/local/tmp/archive/install/libexec Data files installed in: /usr/local/tmp/archive/install/share/serial-0.2.4 Documentation installed in: /usr/local/tmp/archive/install/share/doc/serial-0.2.4 Using alex version 2.2 found on system at: /usr/bin/alex Using ar found on system at: /usr/bin/ar Using c2hs version 0.15.1 found on system at: /usr/local/bin/c2hs Using cpphs version 0.7 found on system at: /usr/bin/cpphs Using ffihugs found on system at: /usr/local/bin/ffihugs Using gcc version 4.3.3 found on system at: /usr/bin/gcc Using ghc version 6.10.2 found on system at: /usr/local/bin/ghc Using ghc-pkg version 6.10.2 found on system at: /usr/local/bin/ghc-pkg Using greencard found on system at: /usr/local/tmp/archive/install/bin/greencard Using haddock version 2.4.2 found on system at: /usr/local/bin/haddock Using happy version 1.17 found on system at: /usr/local/bin/happy No hmake found Using hsc2hs version 0.67 found on system at: /usr/local/bin/hsc2hs Using hscolour version 1.9 found on system at: /usr/local/bin/HsColour Using hugs found on system at: /usr/local/bin/hugs No jhc found Using ld found on system at: /usr/bin/ld No nhc98 found Using pkg-config version 0.22 found on system at: /usr/bin/pkg-config Using ranlib found on system at: /usr/bin/ranlib Using strip found on system at: /usr/bin/strip Using tar found on system at: /bin/tar *** setup build Creating dist/build (and its parents) Creating dist/build/autogen (and its parents) Preprocessing library serial-0.2.4... Building serial-0.2.4... Building library... Creating dist/build (and its parents) /usr/local/bin/ghc -package-name serial-0.2.4 --make -hide-all-packages -i -idist/build -i. -idist/build/autogen -Idist/build/autogen -Idist/build -optP-include -optPdist/build/autogen/cabal_macros.h -odir dist/build -hidir dist/build -stubdir dist/build -package base-3.0.3.1 -package unix-2.3.2.0 -O -Wall System.Serial System.Serial.Manager System.Serial.BlockingManager [1 of 3] Compiling System.Serial.BlockingManager ( System/Serial/BlockingManager.hs, dist/build/System/Serial/BlockingManager.o ) System/Serial/BlockingManager.hs:28:29: Couldn't match expected type `IO (MVar a)' against inferred type `String -> MVar a' In a stmt of a 'do' expression: mv <- newEmptyMVar In the expression: do mv <- newEmptyMVar forkIO $ process h mv timeout return mv In the definition of `serialManager': serialManager h timeout = do mv <- newEmptyMVar forkIO $ process h mv timeout return mv