Problem: creating a work request with `extra_args` and using `--diffstat`: the output does not contain the `--diffstat`. The reason is that the environment might not have the package diffstat, debdiff is ignoring it. After looking at debdiff, we should also make sure that `wdiff` is installed (for `--wdiff-source-control` valid flag). I see that debdiff also checks if `interdiff` binary is available from `patchutils` package is available, but not sure for which flag.