--- ERROR: The following packages could not be configuredoffline and rootfs is read-only: ['mypackage'] --- configuredoffline is written together. The text snippets can be found in meta/lib/oe/rootfs.py
Fixed in master, http://git.yoctoproject.org/cgit.cgi/poky/commit/?id=addeef1dc91306175824b1f5587e40a22773cff4 In future it may be faster/easier to send a patch for this kind of thing!