Clojurians Log v2

I have this list list of fields related with a customer:

(s/keys :req-un [:customer/gender
                   :customer/birthdate
                   :customer/height
                   :customer/weight]
          :opt-un [:customer/middle_name
                   :customer/address]))

I want to re-use the req-un / opt-un keys list for more scenarios. extracting them outside and saving those under def or s/def, and doing:

(s/def ::basic-customer
  (s/keys :req-un ::basic-customer-keys
          :opt-un ::extra-customer-keys))

returns an error: Don't know how to create ISeq from: clojure.lang.Keyword Anyone knows another way perhaps to re-use?