This worked for me:
sudo apt-get install qt4-qmake libqt4-dev
Followed by:
sudo update-alternatives --install /usr/bin/qmake qmake /usr/lib/x86_64-linux-gnu/qt4/bin/qmake 100
This worked for me:
sudo apt-get install qt4-qmake libqt4-dev
Followed by:
sudo update-alternatives --install /usr/bin/qmake qmake /usr/lib/x86_64-linux-gnu/qt4/bin/qmake 100