diff --git a/image/prepare.sh b/image/prepare.sh
index b30df58..188719f 100755
--- a/image/prepare.sh
+++ b/image/prepare.sh
@@ -6,9 +6,8 @@ set -x
 ## Temporarily disable dpkg fsync to make building faster.
 echo force-unsafe-io > /etc/dpkg/dpkg.cfg.d/02apt-speedup
 
-## Enable Ubuntu Universe.
-echo deb http://archive.ubuntu.com/ubuntu precise main universe > /etc/apt/sources.list
-echo deb http://archive.ubuntu.com/ubuntu precise-updates main universe >> /etc/apt/sources.list
+## Enable Ubuntu Universe and Multiverse.
+cp /build/sources.list /etc/apt/sources.list
 apt-get update
 
 ## Install HTTPS support for APT.
diff --git a/image/sources.list b/image/sources.list
new file mode 100644
index 0000000..da73077
--- /dev/null
+++ b/image/sources.list
@@ -0,0 +1,25 @@
+deb http://archive.ubuntu.com/ubuntu precise main restricted
+deb-src http://archive.ubuntu.com/ubuntu precise main restricted
+
+deb http://archive.ubuntu.com/ubuntu precise-updates main restricted
+deb-src http://archive.ubuntu.com/ubuntu precise-updates main restricted
+
+deb http://archive.ubuntu.com/ubuntu precise universe
+deb-src http://archive.ubuntu.com/ubuntu precise universe
+deb http://archive.ubuntu.com/ubuntu precise-updates universe
+deb-src http://archive.ubuntu.com/ubuntu precise-updates universe
+
+deb http://archive.ubuntu.com/ubuntu precise multiverse
+deb-src http://archive.ubuntu.com/ubuntu precise multiverse
+deb http://archive.ubuntu.com/ubuntu precise-updates multiverse
+deb-src http://archive.ubuntu.com/ubuntu precise-updates multiverse
+
+deb http://archive.ubuntu.com/ubuntu precise-backports main restricted universe multiverse
+deb-src http://archive.ubuntu.com/ubuntu precise-backports main restricted universe multiverse
+
+deb http://archive.ubuntu.com/ubuntu precise-security main restricted
+deb-src http://archive.ubuntu.com/ubuntu precise-security main restricted
+deb http://archive.ubuntu.com/ubuntu precise-security universe
+deb-src http://archive.ubuntu.com/ubuntu precise-security universe
+deb http://archive.ubuntu.com/ubuntu precise-security multiverse
+deb-src http://archive.ubuntu.com/ubuntu precise-security multiverse