>>/1639/
by default, loading org mode creates two temporary directories in /tmp/ for babel stuff. You can see them on your system with the prefix babel-, but since /tmp is read-only on vern, it fails. I found the two variables you can change by searching for "dir" in the variable name completion buffer for C-h v org-babel-. You can run elisp to change them.

(setq org-babel-temporary-directory "~/babel-S4TULY")
(setq org-babel-temporary-stable-directory "~/babel-stable-873")

Those are the dir names used in my /tmp/ now. They're deleted on emacs shutdown anyways.