This message was deleted.

you’ve added a copy task without specifying a destination directory; if the intent is to add content into the jar you can do that using the jar task configuration copyspec: from(zipTree(myJar)) or somesuch.

No sure I understand it so for my example above what should I do?

Remove

doLast

and

copy

, and use

zipTree

if you want the content of the JAR:

jar {
  from(zipTree(mine))
}