Okay, so the fix is to inspect ~/.byobu/.tmux.conf and check if the user has specified a default-command or a default-shell, and if so, then short circuit byobu's own logic.
Okay, so the fix is to inspect ~/.byobu/.tmux.conf and check if the user has specified a default-command or a default-shell, and if so, then short circuit byobu's own logic.