IllegalArgumentException with boot 2.6.X

[arichiardi]

Hey guys! I just started to use boot-beanstalk but I received a big:

clojure.lang.ExceptionInfo: No implementation of method: :file of protocol: #'boot.tmpdir/ITmpFile found for class: nil
    data: {:file "/tmp/boot.user7030910776511973313.clj", :line 63}
java.lang.IllegalArgumentException: No implementation of method: :file of protocol: #'boot.tmpdir/ITmpFile found for class: nil
clojure.core/-cache-protocol-fn/invokeStatic    core_deftype.clj:  568
             clojure.core/-cache-protocol-fn    core_deftype.clj:  560
                            boot.tmpdir/fn/G          tmpdir.clj:   25
                          boot.core/tmp-file            core.clj:  380
     adzerk.boot-beanstalk/eval2186/fn/fn/fn  boot_beanstalk.clj:   64
                         boot.core/run-tasks            core.clj:  943
                           boot.core/boot/fn            core.clj:  953
         clojure.core/binding-conveyor-fn/fn            core.clj: 1938

The trigger was boot beanstalk -l so I was not launching it with any -file option.
Maybe a condition to add on line 64.