Michael Albinus <michael.albinus@gmx.de> writes:

> Philip Kaludercic <philipk@posteo.net> writes:
>
> Hi Philip,
>
>> But the question here remains precisely what to use instead of the
>> literal "/bin/sh"?
>
> Well, if there isn't a better value, "/bin/sh" should serve as
> fallback. In my experience with Tramp, it works on most of the remote
> systems. It doesn't work on remote Android devices, for example. But
> the
> number of Emacs < 27 users, running xref-* on a remote Android device,
> is rather limited I believe.
>
> POSIX declines this assumptions. It recommends to call "command -v sh"
> in order to determine the shell path, see
> <https://pubs.opengroup.org/onlinepubs/9699919799/utilities/sh.html>.
>
> Best regards, Michael.

In that case, I'd propose this patch: