Turns out this is a dependency of glibc-devel.
Also zlib-devel is a dependency of elfutils-libelf-devel, and glibc-headers is from glibc-devel.
So, a shorter list of depndencies to add would be:
elfutils-libelf-devel (needed by kernel build)
glibc-devel (general requirement to build shit)
kernel-devel (needed to build a kernel)