Hello, We already have `--with-branch=`, `with-commit=`, ... An additional option could be `--with-patch=package=add-extra-feature.patch` which would apply the patch file `add-extra-feature.patch` located in the my current directory to the sources of `package` before Guix starts building `package`.
This would bring the possibility to easily share patches (for tests, reviews, ... for instance) without having to commit the patch in the source repository of the package, without changing the package definition, and without applying ourselves the patch to our local source repository of the package. Thanks ! -- Philippe SWARTVAGHER PhD Student TADaaM team, Inria Bordeaux Sud-Ouest