Como instalar o qmake? Ubuntu x64 17.04

Question

Eu quero compilar o keepassx 0.4. Diz que preciso de qmake. Eu digito apt-get install qmake e nada acontece.

Eu também fiz

sudo apt-get install build-essential cmake qtbase5-dev libqt5x11extras5-dev qttools5-dev qttools5-dev-tools libgcrypt20-dev zlib1g-dev libxi-dev libxtst-dev

e também executo todos os comandos daqui

link

Nada de ajuda.

Tudo que eu tento me dá:

qmake: could not exec '/usr/lib/x86_64-linux-gnu/qt4/bin/qmake': No such file or directory
CMake Error at /usr/share/cmake-3.7/Modules/FindQt4.cmake:1318 (message):
  Found unsuitable Qt version "" from NOTFOUND, this code requires Qt 4.x
Call Stack (most recent call first):
  CMakeLists.txt:59 (FIND_PACKAGE)

Por favor, ajude!