Error building Qt 5.1 from sources (missing qconfig.h)

[plutino]

Today I got the new qt-everywhere-opensource-src-5.1.0.zip and I tried to build Qt with VC++ 2010.
After configure, nmake script stopped working with error "c:\qt\qt-5.1.0-src\qtbase\include\qtcore../../src/corelib/global/qglobal.h(59) : fatal error C1083: Cannot open include file: 'QtCore/qconfig.h': No such file or directory".
Is this a known bug?