Is there something similar to nix overlays in guix?

[Vinícius dos Santos Oliveira]

For reference:

* https://nixos.wiki/wiki/Overlays
* https://nixos.org/manual/nixpkgs/stable/#chap-overrides
* https://nixos.org/manual/nixpkgs/stable/#chap-overlays

Use case:

You don't want to be a slave to upstream developers' decisions and
want to apply out-of-tree patches that automatically propagate to the
rest of the packages ecosystem.


-- 
Vinícius dos Santos Oliveira
https://vinipsmaker.github.io/