qmake creat Makefile.Debug has error

[freegnu]

every time , when i run the command qmake , the Makefile.Debug that it created will have the wrong files name for QtGui4 and Core4, and i have to change them into the right name when i run make. it is so boring.

LIBS        =        -L"C:\Qt\4.1.2\lib" -L"C:\Qt\4.1.2\lib" -lmingw32 -lqtmaind -lQtGuid4 -lQtCored4

LIBS        =        -L"C:\Qt\4.1.2\lib" -L"C:\Qt\4.1.2\lib" -lmingw32 -lqtmaind -lQtGuid4 -lQtCored4

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dose anyone meet the same problem before, pls give me an advice , thanks