diff -up graphviz-2.12/contrib/Makefile.am.orig graphviz-2.12/contrib/Makefile.am
--- graphviz-2.12/contrib/Makefile.am.orig	2006-04-07 13:50:32.000000000 -0500
+++ graphviz-2.12/contrib/Makefile.am	2008-02-07 15:05:31.000000000 -0600
@@ -1,7 +1,7 @@
 # $Id: Makefile.am,v 1.6 2006/04/07 18:50:32 ellson Exp $ $Revision: 1.6 $
 ## Process this file with automake to produce Makefile.in
 
-SUBDIRS = prune diffimg
+SUBDIRS = prune
 
 EXTRA_DIST = INDEX dotmcl.pl gprof2dot.awk webdot.cgi Makefile.old \
 	sdlshapes lefty-grace dirgraph
diff -up graphviz-2.12/contrib/Makefile.in.orig graphviz-2.12/contrib/Makefile.in
--- graphviz-2.12/contrib/Makefile.in.orig	2006-12-04 16:03:14.000000000 -0600
+++ graphviz-2.12/contrib/Makefile.in	2008-02-07 15:05:39.000000000 -0600
@@ -354,7 +354,7 @@ sharedstatedir = @sharedstatedir@
 subdirs = @subdirs@
 sysconfdir = @sysconfdir@
 target_alias = @target_alias@
-SUBDIRS = prune diffimg
+SUBDIRS = prune
 EXTRA_DIST = INDEX dotmcl.pl gprof2dot.awk webdot.cgi Makefile.old \
 	sdlshapes lefty-grace dirgraph