Problem by Building the MySQL Driver

[Nightrush]

Hi,
i get always the same errors, 4 times ,by building the MySQL Driver from the 5.1 Alpha sources.
"resolve_depends(var, prefix) requires one or two argmunets"

I´m using this guide (with the command prompt)
http://varuagdiary.blogspot.de/2012/08/build-mysql-plugin-for-qt473-on-windows.html

Does anyone have an idea how to fix it ?