I'm not in front of my computer right now, but as far as I recall, there is
a note in the preamble of flymake.el asking maintainers not to use
functionality incompatible with the given emacs dependency.

The solution is either to abide or to create a new package that houses said
functionality and then make that a dependency.

João

On Tue, Feb 8, 2022, 08:35 Robert Pluim <rpluim@gmail.com> wrote:

> >>>>> On Tue, 08 Feb 2022 08:28:21 +0000, Brian Leung <leungbk@posteo.net>
> said:
>
>     Brian> I'm not sure how this kind of thing is usually handled, but for
> this
>     Brian> specific fix, I think it's worth bumping the version since
> there are
>     Brian> probably a decent chunk of people on Emacs <= 27 who will
> otherwise
>     Brian> encounter an issue with Eglot (one guy reported this yesterday
> on the
>     Brian> mailing list).
>
> If thatʼs the case we should change Package-Requires as well. And
> someone™ should test with emacs-2{6,7}.
>
> Robert
> --
>