diff --git a/build.jam b/build.jam
index bfbd74c..0a3fd5c 100644
--- a/build.jam
+++ b/build.jam
@@ -7,9 +7,9 @@ import project ;
 
 project /boost/variant2
     : common-requirements
-        <source>/boost/assert//boost_assert
-        <source>/boost/config//boost_config
-        <source>/boost/mp11//boost_mp11
+        <library>/boost/assert//boost_assert
+        <library>/boost/config//boost_config
+        <library>/boost/mp11//boost_mp11
         <include>include
     ;