[Haskell-cafe] build error with happy-1.15 on ghc-6.6

[Yang]

per a previous thread, i addressed the 'package lang not found' issue
by changing the following lines to:

$ grep -rsn '\blang\b' . | grep Makefile
./happy/src/Makefile:27:SRC_HC_OPTS += #-package lang
./happy/tests/Makefile:62:HC_OPTS += -fglasgow-exts # -package lang

however i still get a build error, seemingly from LALR.lhs:

  /usr/local/bin/ghc -H16m -O -cpp -fglasgow-exts -O    -c LALR.lhs -o
LALR.o  -ohi LALR.hi

  LALR.lhs:626:34: Not in scope: `bounds'

i wasn't able to find 'bounds' defined in any other of the src files.
thanks in advance for any help.