Comment 5 for bug 1877088

So you used installkernel directly rather than make install.
installkernel is shipped with debianutils
A quick look at the changelog (installkernel) didn't showed any changes this year.
So the script itself seems to be stable and unchanged...

You're obviously building and installing kernels in a different way that I do.
I compile and build deb packages directly, that I afterwards just install with apt ...