Help installing FreedomBox in Trisquel

Greetings to all the people of this community.

I am very interested in using FreedomBox [ https://www.freedomboxfoundation.org/ ] in Trisquel, so I followed the guide, whose link I share below, aware that it probably wouldn't work, because the guide was made for Trisquel 5.5:

https://trisquel.info/es/wiki/instalar-paquetes-de-freedombox-en-trisquel

And yes, it didn't work :(

After doing for the second time 'make deb', I found this error message:

https://trisquel.info/files/Captura%20de%20pantalla%20de%202018-04-21%2009-44-09.png

If anyone has any knowledge on the subject, I would appreciate your kind cooperation.

Happy hacking