After talking to Sijmen Mulder on IRC (thanks, TGV Wi-Fi!), I began thinking more about how you could automate the pkgsrc release engineers away. The basic idea for a buildbot would be this: Download and unpack latest pkgsrc.tar.gz for the stable branch. Run the pullup script with the ticket number, then run whatever pullup script it outputs. Figure out the package that this concerns (perhaps from filenames). Go to the package in question, install its dependencies from binary packages.