Clojurians Log v2

Hi, using latest spec2 alpha, I get an exception, is this a known issue or am I doing something wrong?

(s/def :foo/a string?)
(s/def :foo/b :foo/a)
(s/def :foo/m (s/schema [:foo/a :foo/b]))
(s/valid? :foo/m {:foo/a "s" :foo/b "d"})

Unhandled java.lang.IllegalArgumentException
   No implementation of method: :conform* of protocol:
   #'clojure.alpha.spec.protocols/Spec found for class:
   clojure.lang.Keyword

it's a known issue for aliased specs

in that they don't work right

thanks, I'll use (s/def :foo/b (s/and :foo/a)) as a workaround for now