[O] code blocks inside enumerations

[Alan Schmitt]

Hello,

I'm writing a series of exercises where I need to write some code in the
middle of an enumeration. Unfortunately the following does not work:

--8<---------------cut here---------------start------------->8---
1. This is how one write an empty list

#+BEGIN_SRC emacs-lisp
nil
#+END_SRC

2. And this is a second item
--8<---------------cut here---------------end--------------->8---

When I export this, the source block is interpreted as closing the
enumerate environment.

Is there a way to say that the source block should be nested in the
enclosing enumerating item?

Thanks,

Alan