Looks good to me, thanks for the patch !

> In testing I couldn't see anywhere it had broken dependents, though I'd
> hope any breaking change upstream would necessitate a version bump.

You may use ‘guix refresh -l’ and ‘guix build --dependents’ to check for
other packages impacted by your changes, before submitting.

Could you include the no tests flag to comply with upcoming changes in
emacs packages ?

(arguments
       ;; no tests
       (list #:tests? #false))

C.