In win_build
cp -r * /home/pjr/vbox_shared/qp_win

cd /home/pjr/vbox_shared/qp_win

./init_port version_num

In vbox_shared under windows (qp_win) double click on cp2win

Then run mysys2 terminal (update mingw64 terminal)and in there
   cd to /home/pjr/qpversion_num
   sh prepare_rel

NOTE: at some point qc.exe needs to be copied into bin

Now double click on qpwin - installer in Output
 