diff --git a/build/Jamfile b/build/Jamfile
index 19f1c60..ce5fb17 100644
--- a/build/Jamfile
+++ b/build/Jamfile
@@ -13,16 +13,18 @@ rule wave
 
 actions wave
 {
-  chdir $(BOOST_ROOT)/libs/function_types/build 
   $(BOOST_ROOT)/dist/bin/wave -S$(BOOST_ROOT) $(>) -o $(<)
 }
 
 make $(BOOST_ROOT)/libs/function_types/build/timestamps/arity_loops
-  : preprocess_arity_loops.cpp : wave ;
+  : preprocess_arity_loops.cpp : wave 
+  ;
 
 make $(BOOST_ROOT)/libs/function_types/build/timestamps/encoding
-  : preprocess_encoding.cpp : wave ;
+  : preprocess_encoding.cpp : wave 
+  ;
 
 make $(BOOST_ROOT)/libs/function_types/build/timestamps/cc_names
-  : preprocess_cc_names.cpp : wave ;
+  : preprocess_cc_names.cpp : wave
+  ;