This is ghc-6.2, trying to built it with ghc-6.2: $ ./configure --with-x --enable-threaded-rts --enable-objectio --enable-hopengl => [...] ------------------------------------------------------------------------ ==fptools== make all -wr; in /home/cm/Desktop/ghc-6.2/libraries/ObjectIO ------------------------------------------------------------------------ makefile:60: warning: overriding commands for target `HSobjectio.o' ../../mk/package.mk:196: warning: ignoring old commands for target `HSobjectio.o' rm -f Graphics/UI/ObjectIO/StdIOBasic.o; if [ ! -d Graphics/UI/ObjectIO/StdIOBasic_split ]; then mkdir Graphics/UI/ObjectIO/StdIOBasic_split; else /usr/bin/find Graphics/UI/ObjectIO/StdIOBasic_split -name '*.o' -print | xargs rm -f __rm_food; fi; ../../ghc/compiler/ghc-inplace -H16m -O -fglasgow-exts -Iinclude -package-name objectio -O -Rghc-timing -package base -split-objs -c Graphics/UI/ObjectIO/StdIOBasic.hs -o Graphics/UI/ObjectIO/StdIOBasic.o -ohi Graphics/UI/ObjectIO/StdIOBasic.hi <> (cd Graphics/UI/ObjectIO/ && /usr/bin/ld -r -x -o StdIOBasic.o StdIOBasic_split/*.o); rm -f Graphics/UI/ObjectIO/OS/Cutil_12.o; if [ ! -d Graphics/UI/ObjectIO/OS/Cutil_12_split ]; then mkdir Graphics/UI/ObjectIO/OS/Cutil_12_split; else /usr/bin/find Graphics/UI/ObjectIO/OS/Cutil_12_split -name '*.o' -print | xargs rm -f __rm_food; fi; ../../ghc/compiler/ghc-inplace -H16m -O -fglasgow-exts -Iinclude -package-name objectio -O -Rghc-timing -package base -split-objs -c Graphics/UI/ObjectIO/OS/Cutil_12.hs -o Graphics/UI/ObjectIO/OS/Cutil_12.o -ohi Graphics/UI/ObjectIO/OS/Cutil_12.hi Graphics/UI/ObjectIO/OS/Cutil_12.hs:40: parse error on input ``' <> make[2]: *** [Graphics/UI/ObjectIO/OS/Cutil_12.o] Error 1 make[1]: *** [all] Error 1 make[1]: Leaving directory `/home/cm/Desktop/ghc-6.2/libraries' make: *** [build] Error 1