diff -r cce1a27d4325 -r 6fcfc2d330b3 build_opts/NULL
--- a/build_opts/NULL	Thu Aug 28 13:03:37 2014 -0500
+++ b/build_opts/NULL	Thu Aug 28 13:06:08 2014 -0500
@@ -1,2 +1,3 @@
 TARGET_ISA = 'null'
 CPU_MODELS = ''
+PROTOCOL='MI_example'
diff -r cce1a27d4325 -r 6fcfc2d330b3 src/mem/ruby/SConscript
--- a/src/mem/ruby/SConscript	Thu Aug 28 13:03:37 2014 -0500
+++ b/src/mem/ruby/SConscript	Thu Aug 28 13:06:08 2014 -0500
@@ -59,9 +59,6 @@
     'RubyMemory', 'RubyDma', 'RubyPort', 'RubySequencer', 'RubyCacheTrace',
     'RubyPrefetcher'])
 
-if env['TARGET_ISA'] == 'null':
-    Return()
-
 if env['PROTOCOL'] == 'None':
     Return()