[Inkscape-devel] Trouble installing the development environment

Hey guys! I'm installing the environment to develop inkscape on my desktop. I'm following this guide https://inkscape.org/en/develop/getting-started/ but when I try to install the libraries on my linux system with this command:

sudo apt-get build-dep inkscape

the terminal responds:

You must to provide some URIs to the sources.list

What should I do?