Workspace was dirty, so was the cleanup of the code. Oh, and using directories as source was broken.
Of course, fixes and issues are welcome.
Comment post-release: Would you look at that. Two archives, produced by the commandline interface (specifying filenames for both OBBs), weighing at 1.98202519864 and 1.97741704434 gigabytes respectively (that's 2128183352 and 2123235384 for the obsessives), and they worked.