Running setup.sh paal results in an error:
root@6d55f123b18e:/pgmodeler/plugins/graphicalquerybuilder# ./setup.sh paal
Cloning into 'paal'...
fatal: unable to access 'http://siekiera.mimuw.edu.pl:8082/paal/': Failed to connect to siekiera.mimuw.edu.pl port 8082: Connection timed out
Looks like y'all need another source for paal. In the meantime I've disabled the SQL-join part of the graphical query plugin in order to compile pgmodeler.