diff --git a/build.jam b/build.jam
index aac1558..0f9a53b 100644
--- a/build.jam
+++ b/build.jam
@@ -3,7 +3,10 @@
 # (See accompanying file LICENSE_1_0.txt or copy at
 # http://www.boost.org/LICENSE_1_0.txt)
 
-project predef
+path-constant BOOST_PREDEF_ROOT : . ;
+
+project
+    : usage-requirements <include>include
     ;
 
-path-constant BOOST_PREDEF_ROOT : . ;
+alias library ;