I've tried the Moebius workaround (see above). It seems to work, and

#+begin_src scheme
. . .

seems to call my MIT scheme and do results just fine. But it ignores the
idea of multiple sessions, which the geiser-based ob-scheme did so well and
just has one MIT scheme "session." However it does not start a normal
scheme REPL, rather, a "scratch"-like buffer that, in fact, seems to have
MIT scheme listening to it. That is, I can type in

(define (me x)
  (* x x x x))

and with C-x C-e everything is working, just like scratch and elisp do.

Will try to use your patch and get back to you

On Tue, Sep 15, 2015 at 12:48 AM, Nick Dokos <ndokos@gmail.com> wrote:

> Nick Dokos <ndokos@gmail.com> writes:
>
> > Nick Dokos <ndokos@gmail.com> writes:
> >
> >> N.B. this is with guile: I have not tried chicken, MIT Scheme or any
> >> other scheme implementation.
> >>
> >
> > A comment on SO says that geiser (which is used by ob-scheme)
> > only supports guile and racket, so until that changes, chicken or MIT
> > Scheme won't work:
> >
> >
> http://stackoverflow.com/questions/26578152/use-mit-scheme-instead-of-guile-for-org-mode-code-block-evaluation
>
> Eh, I should have checked the geiser site: it says
>
>
>     Racket 6.0 or better
>     Guile 2.0.9 or better
>     Chicken 4.8.0 or better
>
> are supported and there is work afoot to support scsh - no mention of
> MIT Scheme afaict.
>
> --
> Nick
>
>
>