Probably related to this topic -> https://together.jolla.com/question/...name-released/

It has been "fixed" in the latest release but apparently now causes problems in your specific case

You could try to rename/delete /etc/hostname then try to build again and see if it makes any difference.

I'm not a programmer, but maybe "Build Host" must have the same "name".... Your first "Build Host" was 'localhost.localdomain' and now it's 'Jolla'.