you'll have to obtain and install it yourself.
{{PRD:Berkeley DB}} is available from {{ORG[expand]Sleepycat}}'s
-download page {{URL: http://www.sleepycat.com/download.html}}.
+download page {{URL: http://www.sleepycat.com/download/}}.
There are several versions available. At the time of this writing,
the latest release, version 4.1, is recommended. This package is
required if you wish to use the {{TERM:BDB}} database backend.