Building Qt5. Can't spawn “cmd.exe”

I want to build Qt5 for android. I’m following to this instructions http://qt-project.org/wiki/building_qt-android_on_windows . But at the building step 1 I’m getting error like this Can’t spawn “cmd.exe”: No such file or directory at C:\ThirdParty\Qt\qt5\configure line 77 ***qtbase/configure exited with non-zero status. I’m working with cmd.exe and my OS is Windows 7. What does this error mean and what should I do? Thank you in advance!