koan and puppet via kickstart

Hello list!

 I am attempting to install puppet and koan via kickstart so that they
are available on first boot. I am booting xen images via cobbler.

 This is my packages section of my ks file:

%packages
@base
@cluster-storage
@clustering
@core
@editors
@legacy-network-server
@mail-server
@network-server
@news-server
@server-cfg
@text-internet
@web-server
@smb-server
koan
puppet
screen
keyutils
trousers
fipscheck
device-mapper-multipath
kmod-gnbd-xen
kmod-gfs-xen


The only two packages that the initial setup process complains about
are koan and puppet. Yet if I attempt to install these packages via
the command:

yum install -y koan puppet

it works! how can I address what is really the only flaw in my current
kickstart process?



thanks in advance!

-- 
GPG me!!

gpg --keyserver pool.sks-keyservers.net --recv-keys F186197B