After cloning emer/emergent repo, get error from econfig package when building ra25 example:
$ go build
(#) github.com/emer/emergent/v2/econfig
../pkg/mod/github.com/emer/emergent/v2@v2.0.0-dev0.1.7/econfig/args.go:205:14: undefined: reflectx.AnyIsNil