So the problem is basically you can't get it built, under Ubuntu Xenial.
Were you able to build any package at all?
Never created a debian package before
Have you tried building with a newer Ubuntu, like Ubuntu 18.04 Bionic?
I'm trying to target the same release where I am going to be using the package, thus xenial, and I am going to use golang-1.10 from xenial-backports
Thanks,
Juan