Failed to rebuild the distribution of flowable 6.1.2

Good morning, I wanted to consult for a problem that I am having when generating a distribution of flowable 6.1.2 (NOT SNAPSHOT) whitout any change.
Using version 6.1.1 and running the ant task inside the “distro” directory, the zip was generated without any problems.
Now using version 6.1.2, I do the same but I get the following error


I understand the error it throws, but I’m surprised it fails
Someone did the same? I am doing something wrong?



There is something wrong with your checkout.
In 6.1.2 these packages aren’t there anymore.



Thank you very much for the quick answer
That was the problem