Hi, So one issue that happens when cross building is for things that have the #:no-substitutes #t enabled. This is mainly found in service derivations for generating configuration files. I guess if you aren't using substitutes at all and want to cross-compile everything, it will take a while till you hit this problem. I have not found a solution to this problem yet, but I think it should be possible to get gexp->script and gexp->file to ignore the #:system and #:target, since I don't think there's a reason why configuration files can't be cross-built.
David
