Version 0.5 of package Flymake-Guile has just been released in NonGNU ELPA. You can now find it in M-x list-packages RET.
Flymake-Guile describes itself as: ===================== Guile flymake backend ===================== More at https://elpa.nongnu.org/nongnu/flymake-guile.html ## Summary: Flymake backend for GNU Guile using `guild' compile. Usage: (add-hook 'scheme-mode-hook 'flymake-guile) Emacs 29 and later: ## Recent NEWS: # -*- mode: org; coding: utf-8; -*- #+STARTUP: indent #+TITLE: flymake-guile NEWS – history of user-visible changes * NEWS ** 0.5 - Improve diagnostic position for `unused variable` and `unused local top` ** 0.4 - Remove flymake-quickdef dependency ** 0.3 - Improve diagnostic column position