diff --git a/nodepool/scripts/configure_mirror.sh b/nodepool/scripts/configure_mirror.sh
index bc46fcf959..29a8ea56fd 100755
--- a/nodepool/scripts/configure_mirror.sh
+++ b/nodepool/scripts/configure_mirror.sh
@@ -25,6 +25,7 @@ NODEPOOL_MIRROR_HOST=${NODEPOOL_MIRROR_HOST:-mirror.$NODEPOOL_REGION.$NODEPOOL_C
 NODEPOOL_MIRROR_HOST=$(echo $NODEPOOL_MIRROR_HOST|tr '[:upper:]' '[:lower:]')
 NODEPOOL_PYPI_MIRROR=${NODEPOOL_PYPI_MIRROR:-http://$NODEPOOL_MIRROR_HOST/pypi/simple}
 NODEPOOL_WHEEL_MIRROR=${NODEPOOL_WHEEL_MIRROR:-http://$NODEPOOL_MIRROR_HOST/wheel/$AFS_SLUG}
+NODEPOOL_UBUNTU_MIRROR=${NODEPOOL_UBUNTU_MIRROR:-http://$NODEPOOL_MIRROR_HOST/ubuntu}
 
 cat >/tmp/pip.conf <<EOF
 [global]
@@ -49,48 +50,16 @@ host $NODEPOOL_MIRROR_HOST
 LSBDISTID=$(lsb_release -is)
 LSBDISTCODENAME=$(lsb_release -cs)
 if [ "$LSBDISTID" == "Ubuntu" ] ; then
-sudo dd of=/etc/apt/sources.list <<EOF
-# See http://help.ubuntu.com/community/UpgradeNotes for how to upgrade to
-# newer versions of the distribution.
-deb http://us.archive.ubuntu.com/ubuntu/ $LSBDISTCODENAME main restricted
-deb-src http://us.archive.ubuntu.com/ubuntu/ $LSBDISTCODENAME main restricted
-
-## Major bug fix updates produced after the final release of the
-## distribution.
-deb http://us.archive.ubuntu.com/ubuntu/ $LSBDISTCODENAME-updates main restricted
-deb-src http://us.archive.ubuntu.com/ubuntu/ $LSBDISTCODENAME-updates main restricted
-
-## N.B. software from this repository is ENTIRELY UNSUPPORTED by the Ubuntu
-## team. Also, please note that software in universe WILL NOT receive any
-## review or updates from the Ubuntu security team.
-deb http://us.archive.ubuntu.com/ubuntu/ $LSBDISTCODENAME universe
-deb-src http://us.archive.ubuntu.com/ubuntu/ $LSBDISTCODENAME universe
-deb http://us.archive.ubuntu.com/ubuntu/ $LSBDISTCODENAME-updates universe
-deb-src http://us.archive.ubuntu.com/ubuntu/ $LSBDISTCODENAME-updates universe
-
-## N.B. software from this repository is ENTIRELY UNSUPPORTED by the Ubuntu
-## team, and may not be under a free licence. Please satisfy yourself as to
-## your rights to use the software. Also, please note that software in
-## multiverse WILL NOT receive any review or updates from the Ubuntu
-## security team.
-deb http://us.archive.ubuntu.com/ubuntu/ $LSBDISTCODENAME multiverse
-deb-src http://us.archive.ubuntu.com/ubuntu/ $LSBDISTCODENAME multiverse
-deb http://us.archive.ubuntu.com/ubuntu/ $LSBDISTCODENAME-updates multiverse
-deb-src http://us.archive.ubuntu.com/ubuntu/ $LSBDISTCODENAME-updates multiverse
-
-## N.B. software from this repository may not have been tested as
-## extensively as that contained in the main release, although it includes
-## newer versions of some applications which may provide useful features.
-## Also, please note that software in backports WILL NOT receive any review
-## or updates from the Ubuntu security team.
-deb http://us.archive.ubuntu.com/ubuntu/ $LSBDISTCODENAME-backports main restricted universe multiverse
-deb-src http://us.archive.ubuntu.com/ubuntu/ $LSBDISTCODENAME-backports main restricted universe multiverse
-
-deb http://security.ubuntu.com/ubuntu $LSBDISTCODENAME-security main restricted
-deb-src http://security.ubuntu.com/ubuntu $LSBDISTCODENAME-security main restricted
-deb http://security.ubuntu.com/ubuntu $LSBDISTCODENAME-security universe
-deb-src http://security.ubuntu.com/ubuntu $LSBDISTCODENAME-security universe
-deb http://security.ubuntu.com/ubuntu $LSBDISTCODENAME-security multiverse
-deb-src http://security.ubuntu.com/ubuntu $LSBDISTCODENAME-security multiverse
+    sudo dd of=/etc/apt/sources.list <<EOF
+deb $NODEPOOL_UBUNTU_MIRROR $LSBDISTCODENAME main universe
+deb $NODEPOOL_UBUNTU_MIRROR $LSBDISTCODENAME-updates main universe
+deb $NODEPOOL_UBUNTU_MIRROR $LSBDISTCODENAME-backports main universe
+deb $NODEPOOL_UBUNTU_MIRROR $LSBDISTCODENAME-security main universe
+EOF
+    # Turn off multi-arch
+    sudo dpkg --remove-architecture i386
+    # Turn off checking of GPG signatures
+    sudo dd of=/etc/apt/apt.conf.d/99unauthenticated <<EOF
+APT::Get::AllowUnauthenticated "true";
 EOF
 fi