$ sudo apt-get update
$ sudo apt-get install qt5-qmake 

qt5-qmake is installed in your system.

Make ensure the qt5-qmake package were installed using the commands given below,

$ sudo dpkg-query -l | grep qt5-qmake *

You will get with qt5-qmake package name, version, architecture and description in a table

qt5-qmake package basic information: