I don't know how. And the answer may be Lisp (!) ... but a decent way to deal with tonnes of cross cutting concerns out of the box for many use cases.

For example a web server needs authcn, authzn, logging, metrics, db retrys, and all the usual gubbins. A DSL for this would rock.

Elm is an example of a language that went down the DSL road and while arguable make some rough choices it proved that a DSL can work really nicely. One side effect is dep management was perfect!