$ sudo apt-get update
$ sudo apt-get install qtcreator-dbg 

qtcreator-dbg is installed in your system.

Make ensure the qtcreator-dbg package were installed using the commands given below,

$ sudo dpkg-query -l | grep qtcreator-dbg *

You will get with qtcreator-dbg package name, version, architecture and description in a table

qtcreator-dbg package basic information: