> The original author seems to he worried that some part of the system is not being updated to the newest available source before being built. I don't know of a

> The original author seems to he worried that some part of the system is not being updated to the newest available source before being built. I don't know of any system that would somehow automate that process. Subversion with svn:external does exactly this by default, and generally you only peg a revision in an external dependency when you tag for release.