Build fails if Qt SDK is installed in directory with parentheses

I installed the Qt SDK in c:\programfiles(x86) (a directory where I install all software that can't handle spaces in a path).

When I try to build an example, I get the following error messages:

Running build steps for project collidingmice...
Starting: "c:\programfiles(x86)\qtsdk\desktop\qt\4.7.3\msvc2008\bin\qmake.exe" "C:\ProgramFiles(x86)\QtSDK\Examples\4.7\graphicsview\collidingmice\collidingmice.pro" -r -spec win32-msvc2008
'c:\ProgramFiles' is not recognized as an internal or external command,
operable program or batch file.
'c:\ProgramFiles' is not recognized as an internal or external command,
operable program or batch file.

It seems the part of the path before the first parenthese is considered a command.