--- a/make-rules/shared-macros.mk	Wed Mar 06 06:35:42 2013 -0800
+++ b/make-rules/shared-macros.mk	Wed Mar 06 14:19:46 2013 -0700
@@ -278,6 +278,9 @@
 CC =		$(CC.$(COMPILER).$(BITS))
 CXX =		$(CXX.$(COMPILER).$(BITS))
 
+RUBY_VERSION =	1.8
+RUBY.1.8 =	/usr/bin/ruby18
+VENDOR_RUBY =	/usr/ruby/$(RUBY_VERSION)/lib/ruby/vendor_ruby/$(RUBY_VERSION)
 
 PYTHON_VENDOR_PACKAGES.32 = /usr/lib/python$(PYTHON_VERSION)/vendor-packages
 PYTHON_VENDOR_PACKAGES.64 = /usr/lib/python$(PYTHON_VERSION)/vendor-packages/64