Timestamp out of range notes on Make output

Compile an example with the latest Qt linux 32-bit RC build (build number 63):
tasundqv@IT-D-2VFR5W1:~/Downloads/Qt5/5.1.0-beta1/gcc/examples/widgets/itemviews/addressbook$ qmake
tasundqv@IT-D-2VFR5W1:~/Downloads/Qt5/5.1.0-beta1/gcc/examples/widgets/itemviews/addressbook$ make &> log_make.txt

Error: make log contains error notes about timestamps:

make: addressbook.pro: Timestamp out of range; substituting 1970-01-01 02:00:00
make: ../../../../mkspecs/linux-g++/qmake.conf: Timestamp out of range; substituting 1970-01-01 02:00:00
make: ../../../../mkspecs/features/spec_pre.prf: Timestamp out of range; substituting 1970-01-01 02:00:00
make: ../../../../mkspecs/common/shell-unix.conf: Timestamp out of range; substituting 1970-01-01 02:00:00

--> see the attached log.