The first patch generation script, copypkgs, does not have any safeguards to prevent the user from attempting to create the same patch (by mistake) twice.

Here are the missing checks

# 1) If where you're copying packages from has an "orig" directory,
# someone has already created patches from this image and you
# would be creating patches using freshbit images, corrupting
# the patch generation.
#
# 2) If patch creation directory exists, then someone has already attempted
# to build a patch corresponding to ${RELEASE_NUMBER}${UPDATE_U}-${BUILD}-${FLAVOR}