I know quite well what Guile and Scheme are; I was asking about the specific DSL/library/whatever combo that Guix is programmed in. The code snippets on the page which this thread is about, for example, mostly use macros that seem to mimic their Nix equivalents very closely but are marginally more verbose. I would very much like to see a compelling example where the fact that Guile has macros makes a practical difference.
(Note that Nix's laziness is not an unalloyed good either, for example it is notoriously difficult to debug. But let's limit ourselves to pure expressiveness for now)
(Note that Nix's laziness is not an unalloyed good either, for example it is notoriously difficult to debug. But let's limit ourselves to pure expressiveness for now)