hmac verify with String signature

gistfile1.clj

(-> (hmac/hash "foo bar" "mysecretkey" :sha256)
    (codecs/bytes->hex))
=> "61849448bdbb67b39d609471eead667e65b0d1b9e01b1c3bf7aa56b83e9c8083"
;; so far, so good

(hmac/verify "foo bar" "61849448bdbb67b39d609471eead667e65b0d1b9e01b1c3bf7aa56b83e9c8083" "mysecretkey" :sha256)
=> false
;; should be true, no?

(def bytes-hash (hmac/hash "foo bar" "mysecretkey" :sha256))
=> #'user/bytes-hash
(hmac/verify "foo bar" bytes-hash "mysecretkey" :sha256)
=> true