diff --git a/build.jam b/build.jam
index 3619487..f67ca8c 100644
--- a/build.jam
+++ b/build.jam
@@ -7,12 +7,12 @@ import project ;
 
 project /boost/function_types
     : common-requirements
-        <source>/boost/config//boost_config
-        <source>/boost/core//boost_core
-        <source>/boost/detail//boost_detail
-        <source>/boost/mpl//boost_mpl
-        <source>/boost/preprocessor//boost_preprocessor
-        <source>/boost/type_traits//boost_type_traits
+        <library>/boost/config//boost_config
+        <library>/boost/core//boost_core
+        <library>/boost/detail//boost_detail
+        <library>/boost/mpl//boost_mpl
+        <library>/boost/preprocessor//boost_preprocessor
+        <library>/boost/type_traits//boost_type_traits
         <include>include
     ;