I found these two references
1. Add custom build step to generate package files
http://qt-funk.blogspot.com/2011/02/...le-source.html
2. Change qtc_packaging/debian-fremantle/rules for MS Windows environment. For the build-stamp step, I found adding only "qmake" is good for me
http://raeda.blog.com/2011/02/19/upl...-from-windows/

Then I used Maemo extra assistant and it worked!