diff --git a/buildserver/Dockerfile b/buildserver/Dockerfile
index eb69c1eb2..2b90e36a6 100644
--- a/buildserver/Dockerfile
+++ b/buildserver/Dockerfile
@@ -3,7 +3,7 @@ MAINTAINER jake@devtable.com
 
 RUN echo deb http://archive.ubuntu.com/ubuntu precise universe > /etc/apt/sources.list.d/universe.list
 RUN apt-get update -qq
-RUN apt-get install -qqy iptables ca-certificates lxc python-virtualenv git python-dev
+RUN apt-get install -qqy iptables ca-certificates lxc python-virtualenv git python-dev xz-utils
 
 # This will use the latest public release. To use your own, comment it out...
 ADD https://get.docker.io/builds/Linux/x86_64/docker-latest /usr/local/bin/docker