diff --git a/build.jam b/build.jam
index c76c3d536..0ef57f79f 100644
--- a/build.jam
+++ b/build.jam
@@ -14,37 +14,39 @@ if ! [ feature.valid known-warnings ] {
 
 local 9.0-14.0 = 9.0 10.0 11.0 12.0 14.0 ;
 
+constant boost_dependencies :
+    /boost/array//boost_array
+    /boost/assert//boost_assert
+    /boost/config//boost_config
+    /boost/core//boost_core
+    /boost/endian//boost_endian
+    /boost/function//boost_function
+    /boost/function_types//boost_function_types
+    /boost/fusion//boost_fusion
+    /boost/integer//boost_integer
+    /boost/io//boost_io
+    /boost/iterator//boost_iterator
+    /boost/move//boost_move
+    /boost/mpl//boost_mpl
+    /boost/optional//boost_optional
+    /boost/phoenix//boost_phoenix
+    /boost/pool//boost_pool
+    /boost/preprocessor//boost_preprocessor
+    /boost/proto//boost_proto
+    /boost/range//boost_range
+    /boost/regex//boost_regex
+    /boost/smart_ptr//boost_smart_ptr
+    /boost/static_assert//boost_static_assert
+    /boost/thread//boost_thread
+    /boost/throw_exception//boost_throw_exception
+    /boost/type_traits//boost_type_traits
+    /boost/typeof//boost_typeof
+    /boost/unordered//boost_unordered
+    /boost/utility//boost_utility
+    /boost/variant//boost_variant ;
+
 project /boost/spirit
     : common-requirements
-        <library>/boost/array//boost_array
-        <library>/boost/assert//boost_assert
-        <library>/boost/config//boost_config
-        <library>/boost/core//boost_core
-        <library>/boost/endian//boost_endian
-        <library>/boost/function//boost_function
-        <library>/boost/function_types//boost_function_types
-        <library>/boost/fusion//boost_fusion
-        <library>/boost/integer//boost_integer
-        <library>/boost/io//boost_io
-        <library>/boost/iterator//boost_iterator
-        <library>/boost/move//boost_move
-        <library>/boost/mpl//boost_mpl
-        <library>/boost/optional//boost_optional
-        <library>/boost/phoenix//boost_phoenix
-        <library>/boost/pool//boost_pool
-        <library>/boost/preprocessor//boost_preprocessor
-        <library>/boost/proto//boost_proto
-        <library>/boost/range//boost_range
-        <library>/boost/regex//boost_regex
-        <library>/boost/smart_ptr//boost_smart_ptr
-        <library>/boost/static_assert//boost_static_assert
-        <library>/boost/thread//boost_thread
-        <library>/boost/throw_exception//boost_throw_exception
-        <library>/boost/type_traits//boost_type_traits
-        <library>/boost/typeof//boost_typeof
-        <library>/boost/unordered//boost_unordered
-        <library>/boost/utility//boost_utility
-        <library>/boost/variant//boost_variant
         <include>include
     : requirements
         # Warnings that we have not managed to fix yet
@@ -67,9 +69,10 @@ project /boost/spirit
     ;
 
 explicit
-    [ alias boost_spirit ]
+    [ alias boost_spirit : : : : <library>$(boost_dependencies) ]
     [ alias all : boost_spirit example test ]
     ;
 
 call-if : boost-library spirit
     ;
+