--- haddock/src/Makefile.old	2005-04-16 15:05:33.000000000 -0400
+++ haddock/src/Makefile	2005-04-16 15:06:17.000000000 -0400
@@ -7,7 +7,7 @@
 
 # Don't use any hslibs packages in GHC >= 5.04
 ifeq "$(ghc_ge_504)" "YES"
-SRC_HC_OPTS += -package network -fglasgow-exts -cpp
+SRC_HC_OPTS += -package network -package mtl -fglasgow-exts -cpp
 else
 SRC_HC_OPTS += -package data -package text -package util -package net -fglasgow-exts -cpp
 endif

.