--- a/testing/docker/b2g-build/system-setup.sh
+++ b/testing/docker/b2g-build/system-setup.sh
@@ -79,17 +79,17 @@ yum install -y                      \
   vim                               \
   nodejs                            \
   npm                               \
   ;
 
 # Install mozilla specific packages
 
 # puppetagain packages
-base_url="http://puppetagain.pub.build.mozilla.org/data/repos/yum/releng/public/CentOS/6/x86_64/"
+base_url="http://mockbuild-repos.pub.build.mozilla.org/releng/public/CentOS/6/x86_64/"
 
 # Install Python 2.7, pip, and virtualenv (needed for things like mach)
 rpm -ih $base_url/mozilla-python27-2.7.3-1.el6.x86_64.rpm
 export PATH="/tools/python27-mercurial/bin:/tools/python27/bin:$PATH"
 wget --no-check-certificate https://pypi.python.org/packages/source/s/setuptools/setuptools-1.4.2.tar.gz
 tar -xvf setuptools-1.4.2.tar.gz
 cd setuptools-1.4.2 && python setup.py install
 cd - && rm -rf setuptools-1.4.2*