RUN apt-key adv --keyserver pool.sks-keyservers.net --recv 1078ECD7
RUN apt-get update -q
-RUN apt-get install -qy git python-minimal python-arvados-python-client
+RUN apt-get install -qy git python-minimal python-virtualenv python-arvados-python-client
RUN gpg --keyserver pool.sks-keyservers.net --recv-keys D39DC0E3