+parser/Parser_HC_OPTS += -Onot -K2m -fno-warn-incomplete-patterns
+
+# The latest GHC version doesn't have a -K option yet, and it doesn't
+# seem to be necessary anymore for the modules below.
+ifeq "$(ghc_411_at_least)" "0"
+rename/ParseIface_HC_OPTS += -K2m
+parser/Parser_HC_OPTS += -K2m
+endif