On Sat, May 13 2017, Carlo Zancanaro wrote:
> I've attached two patches, one of which is the definition of
> define-service-type, and the other which is me changing the
> exim-service-type definition to use it.

It turns out these patches don't work at all. I wrote the code for them
around a month ago and naively assumed they'd still work. They are quite
broken, so maybe just ignore them. I'm playing around with it again now,
so we'll see what I can come up with.

Carlo