diff --git a/ext/build_defaults.yaml b/ext/build_defaults.yaml
index cce7f889e..553f3386e 100644
--- a/ext/build_defaults.yaml
+++ b/ext/build_defaults.yaml
@@ -1,20 +1,20 @@
 ---
 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-natty-i386.cow base-oneiric-i386.cow base-precise-i386.cow base-quantal-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'
 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-5-i386 pl-6-i386 fedora-15-i386 fedora-16-i386 fedora-17-i386'
-rc_mocks: 'pl-5-i386-dev pl-6-i386-dev fedora-15-i386-dev fedora-16-i386-dev fedora-17-i386-dev'
+final_mocks: 'pl-5-i386 pl-6-i386 fedora-16-i386 fedora-17-i386'
+rc_mocks: 'pl-5-i386-dev pl-6-i386-dev fedora-16-i386-dev fedora-17-i386-dev'
 yum_host: 'burji.puppetlabs.com'
 yum_repo_path: '/opt/repository/yum/'
 build_gem: FALSE
 build_dmg: TRUE
 apt_host: 'burji.puppetlabs.com'
 apt_repo_url: 'http://apt.puppetlabs.com'
 apt_repo_path: '/opt/repository/incoming'