(define-command-global prompting-quit ()
  "Asks the user to quit before actually quitting!"
  (if-confirm ("Do you really want to close Nyxt?")
              (quit)
              nil))

(define-configuration buffer
  ((override-map (let ((map (make-keymap "override-map")))
                   (define-key map
                     "C-x C-c" 'prompting-quit)))))