Sometime ago, i wrote a bit of a guide on how to install echolink on linux, what packages you needed to install and what not and how to compile and install it. Its one of the posts on here that gets a lot of comments, usually questions as to why its not working for them or upgrading their OS broke everything because of static linking.
Anyway, as it turns out someone has taken over maintaining the project, they have made the few minor changed that were needed to make it compile on modern flavors of linux and they have made packages available for it.
So its now just a simple matter to install it on any debian based distro using aptitude.
sudo apt install qtel
And that is all you have to do.