* Mandatory first heading
  :PROPERTIES:
  :header-args:scheme: :exports both :results value
  :END:

#+begin_src elisp
  (setq package-archives
	'(("gnu" . "https://elpa.gnu.org/packages/")
	  ("nongnu" . "https://elpa.nongnu.org/nongnu/")))
  (setq package-check-signature t)
  (package-initialize)
  (package-install 'geiser)
  (package-install 'geiser-chez)
  (package-install 'geiser-racket)
  (package-install 'htmlize)

  (setq-local org-confirm-babel-evaluate nil)
  (org-babel-do-load-languages 'org-babel-load-languages '((emacs-lisp . t)
							   (scheme . t)))
  (org-export-to-file 'html "test.html")
#+end_src

#+begin_src scheme :scheme racket 
  (banner)
#+end_src

#+begin_src scheme :scheme chez
  (scheme-version)
#+end_src