If you had been building ISOs using the Distro Constructor, you will need to update the configuration file you have been using to remove the DIST_ADDITIONAL_MOD config variable. The reference of that variable to the slimcd_post_processing.tar is no longer needed because all the code in the tar file is now included in the Distro Constructor's source.
If you are doing something special, and need to provide an additional tar file for modifications to the image, the new OPTIONAL config variable to use is DIST_ADDITIONAL_MOD. If you are just building the Live CD, this variable does not need to be defined. Please take a look at the test_data/test1.conf file for an example. Thanks, --Karen
