unable to find match for kerenl-devel in centos code example

Example: centos install specific kernel headers

$ sudo yum install "kernel-devel-uname-r == $(uname -r)"
Loaded plugins: auto-update-debuginfo, changelog, langpacks, refresh-packagekit
No package kernel-devel-uname-r == 3.12.6-200.fc19.x86_64 available.
Error: Nothing to do