Emacs - Org Babel with D

[Peter Williamson]

Has anyone successfully set up org-babel to use D?
I tried following the instructions here: 
https://orgmode.org/worg/org-contrib/babel/languages/ob-doc-C.html

However, I get an error telling me that it can't seem to find the 
D compiler.
"No org-babel-execute function for D!"

M-x customize-group org-babel
is the recommended solution, but that the customize buffer 
doesn't seem to be letting me edit anything...