$NetBSD$
Use pkgsrc databases/db4.
--- src/db.h.orig 2015-09-28 15:49:30.000000000 +0000
+++ src/db.h
@@ -18,7 +18,7 @@
#include <boost/filesystem/path.hpp>
-#include <db_cxx.h>
+#include <db4/db_cxx.h>
class CDiskBlockIndex;
class COutPoint;