Create a new channel as a copy of main.
Rename main to:
Delete main? This cannot be undone.
{ 'version': 0, 'use-external-names': EXTERNAL_NAMES, 'roots': [{ 'type': 'file', 'name': 'OUT_DIR/external-names.h', 'external-contents': 'INPUT_DIR/external-names.h' }] }