/usr/local/rvm/bin/rvm install 2.1 && \
/usr/local/rvm/bin/rvm alias create default ruby-2.1
+# udev daemon can't start in a container, so don't try.
+RUN mkdir -p /etc/udev/disabled
+
RUN echo "deb file:///arvados/packages/debian7/ /" >>/etc/apt/sources.list