--- treil-1.8.orig/ruby/Makefile.in
+++ treil-1.8/ruby/Makefile.in
@@ -325,7 +325,7 @@
 
 
 stamp-arch: $(top_builddir)/libtreil.la treil.c
-	mkdir -p $(RUBYARCH) && cd $(RUBYARCH) && $(RUBY) ../extconf.rb && $(MAKE)
+	mkdir -p $(RUBYARCH) && cd $(RUBYARCH) && $(RUBY) ../extconf.rb && $(MAKE) LIBS='-lruby1.8 -ltreil'
 	touch $@
 
 all-local: stamp-arch