--- mercury-extras-0.12.2.orig/concurrency/Mmakefile	2003-01-16 23:44:13.000000000 +1300
+++ mercury-extras-0.12.2/concurrency/Mmakefile	2006-03-26 18:45:21.000000000 +1200
@@ -8,6 +8,8 @@
 
 TESTS = philo philo2 philo3 midimon
 
+LIBGRADES := $(LIBGRADES:hlc.gc=)
+
 -include ../Mmake.params
 
 default_target: all