Hey!

>>> +      ((image ->  (find-image file-system-type (%current-target-system)))
>>>         (sys       (system-derivation-for-action os image action
>>>                                                  #:file-system-type file-system-type
>>>                                                  #:image-size image-size
>>
>> Same here, otherwise this look good to me.

I missed something, "target" variable is shadowing the "target"
argument. The attached patch should fix the issue, I'm testing it.

Thanks,

Mathieu