Make error when building Wirshark : uic: could not find a Qt installation of ‘'

Hi,

I am trying to build wireshark on ubuntu 12.04.

I ran ./autogen.sh and ./configure.

./configure complained about uninstalled packages and I ran the following commands to get it work

 pkg-config --libs --cflags Qt5Core
 sudo apt-get install qt5-default qttools5-dev-tools
 sudo apt-get install qtdeclarative5-dev
 sudo aptitude install build-essential automake autoconf libgtk2.0-dev libglib2.0-dev libpcap0.8-dev flex bison
 sudo apt-get install build-essential automake autoconf libgtk2.0-dev libglib2.0-dev libpcap0.8-dev flex bison

I then did a make and I am seeing this error:

uic: could not find a Qt installation of ''

Do I have to set any environment variables?