> By the way, is there a convenient way to catch this kind of errors
> without pushing to master first?

To answer my own question:

--8<---------------cut here---------------start------------->8---
guix pull --url=$HOME/projects/guix --dry-run
--8<---------------cut here---------------end--------------->8---

does the trick.  This is practical and important enough, I suggest we
add it to the manual in `(guix) 14.6 Submitting Patches'.

Thoughts?

-- 
Pierre Neidhardt
https://ambrevar.xyz/