Thanks for the patch ! You may send an updated version, including the
copyright.

A few comments:

- emacs-eros 0.1.0 seems necessary as propagated input (we have
  0.0.1-2.dd89102 in the repos)
- you may drop the .git in url
- why do you need to (require 'subr-x) ? this is not a decision of
  package maintainers ?
- `guix lint emacs-bqn-mode' uses release "2024-09-10" as version, not
  0.1.0, maybe it is better to use it so that `guix refresh' will warn
  about future updates