- /usr/local/rvm/bin/rvm alias create default ruby-2.1 && \
- /usr/local/rvm/bin/rvm-exec default gem install fpm
+ /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