gqrx require gnuradio. you can reference this to install gnuradio:

http://www.zhixun-wireless.top/install-uhd-and-gnuradio-on-ubuntu-1604

after install gnuradio just run:

sudo apt-get install qt5-qmake qtbase5-dev pkg-config libqt5svg5-dev
export QT_SELECT=qt5
git clone https://github.com/csete/gqrx.git
cd gqrx
git checkout v2.11.5
mkdir build
cd build
qmake ../gqrx.pro
make
sudo ./gqrx