"Unknown sequence editconfigs" when trying to build a kernel

I am following the instructions here: https://wiki.ubuntu.com/Kernel/BuildYourOwnKernel

I ran

apt-get source linux-image-$(uname -r)
cd linux-signed-4.15.0
chmod a+x debian/rules
chmod a+x debian/scripts/*
chmod a+x debian/scripts/misc/*
fakeroot debian/rules clean
fakeroot debian/rules editconfigs

The output of the last command is

dh editconfigs
dh: Unknown sequence editconfigs (choose from: binary binary-arch binary-indep build build-arch build-indep clean install install-arch install-indep)
debian/rules:35: recipe for target 'editconfigs' failed
make: *** [editconfigs] Error 2

My uname -r is 4.15.0-34-generic.

A possible duplicate is Enable the touchscreen of a Mediacom WinPad W700, but the answer there does not address the "Unknown sequence editconfigs" message. Do the BuildYourOwnKernel instructions need to be updated?

It seems as if in 18.04 you need to run:

apt-get source linux-source

Instead of:

apt-get source linux-image-$(uname -r)

This should fix your problem.