Dell XPS 13 9350 + Dell 4-1 adapter

[samjam]

it looks like the build system you have is not the one used to build your kernel.

Find what kernel package you have, and then try running:

apt-get update
apt-get upgrade
apt-get build-dep linux-image-3.19.0-59-generic # <-- (fix for your kernel version)

and then try again.