Windows Distribution automation script (alpha)

Currently I am creating an automation script for creating Windows Binary
distribution, but still cannot find out how to build executable via
commandline (not using easypaint.pro project file). If some one could
teach me how to do that, I'll make sure to provide Windows binary
distribution.
Maybe something as simple as this:
cd ./EasyPaint/sources
lrelease easypaint.pro
qmake
make
make install
but for Windows instead of Linux.