diff --git a/ext/build_defaults.yaml b/ext/build_defaults.yaml
index 8c522bbaf..478ea903e 100644
--- a/ext/build_defaults.yaml
+++ b/ext/build_defaults.yaml
@@ -1,23 +1,23 @@
 ---
 packaging_url: 'git://github.com/puppetlabs/packaging.git --branch=master'
 packaging_repo: 'packaging'
 default_cow: 'base-squeeze-i386.cow'
-cows: 'base-lucid-i386.cow base-precise-i386.cow base-quantal-i386.cow base-raring-i386.cow base-sid-i386.cow base-squeeze-i386.cow base-stable-i386.cow base-testing-i386.cow base-unstable-i386.cow base-wheezy-i386.cow base-saucy-i386.cow'
+cows: 'base-lucid-i386.cow base-precise-i386.cow base-quantal-i386.cow base-raring-i386.cow base-squeeze-i386.cow base-stable-i386.cow base-testing-i386.cow base-wheezy-i386.cow base-saucy-i386.cow'
 pbuild_conf: '/etc/pbuilderrc'
 packager: 'puppetlabs'
 gpg_name: 'info@puppetlabs.com'
 gpg_key: '4BD6EC30'
 sign_tar: FALSE
 # a space separated list of mock configs
 final_mocks: 'pl-el-5-i386 pl-el-6-i386 pl-el-7-x86_64 pl-fedora-18-i386 pl-fedora-19-i386 pl-fedora-20-i386'
 yum_host: 'yum.puppetlabs.com'
 yum_repo_path: '/opt/repository/yum/'
 build_gem: TRUE
 build_dmg: TRUE
 apt_host: 'apt.puppetlabs.com'
 apt_repo_url: 'http://apt.puppetlabs.com'
 apt_repo_path: '/opt/repository/incoming'
 ips_repo: '/var/pkgrepo'
 ips_store: '/opt/repository'
 ips_host: 'solaris-11-ips-repo.acctest.dc1.puppetlabs.net'
 tar_host: 'downloads.puppetlabs.com'