Index: tools/build/v2/tools/common.jam
===================================================================
--- tools/build/v2/tools/common.jam	(revision 47174)
+++ tools/build/v2/tools/common.jam	(working copy)
@@ -576,7 +576,14 @@
         $(<)-mkdir = true ;
 
         # Schedule the mkdir build action.
-        MkDir1 $(<) ;
+        if [ os.name ] = NT
+        {
+            MkDir1-quick-fix-for-windows $(<) ;
+        }
+        else
+        {
+            MkDir1-quick-fix-for-unix $(<) ;
+        }
 
         # Prepare a Jam 'dirs' target that can be used to make the build only
         # construct all the target directories.
@@ -617,6 +624,21 @@
 }
 
 
+# (todo)
+#   The following quick-fix actions should be replaced using the original MkDir1
+# action once Boost Jam gets updated to correctly detect different paths leading
+# up to the same filesystem target and triggers their build action only once.
+#                                             (todo) (04.07.2008.) (Jurko)
+actions MkDir1-quick-fix-for-unix
+{
+    mkdir -p "$(<)"
+}
+actions MkDir1-quick-fix-for-windows
+{
+    if not exist "$(<)\\" mkdir "$(<)"
+}
+
+
 actions piecemeal together existing Clean
 {
     $(RM) "$(>)"