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+# This docker image only sets up packages on top of the original Ubuntu image.
+# Everything else is setup is a child docker image derived from this one, such
+# that changes to our scripts don't trigger the rebuild of this base image,
+# possibly leading to breakage. (See bug 1503756 and bug 1678451 for examples
+# of such recent breakages)
+FROM $DOCKER_IMAGE_PARENT
+MAINTAINER Edwin Takahashi <egao@mozilla.com>
+
+ARG TASKCLUSTER_ROOT_URL
+ARG DOCKER_IMAGE_PACKAGES
+RUN /usr/local/sbin/setup_packages.sh $TASKCLUSTER_ROOT_URL $DOCKER_IMAGE_PACKAGES
+
+# %include taskcluster/docker/recipes/ubuntu1804-test-system-setup-base.sh
+ADD topsrcdir/taskcluster/docker/recipes/ubuntu1804-test-system-setup-base.sh /setup/system-setup.sh
+RUN bash /setup/system-setup.sh
+
+# gnome-keyring-daemon is configured to have the IPC_LOCK capability (to lock pages with secrets in
+# memory), but docker isn't run with that capability granted. So, if we were to try running
+# gnome-keyring-daemon without first clearing the capability, it would just exit with the message
+# "Operation not permitted". Luckily it doesn't actually require the capability.
+RUN setcap -r /usr/bin/gnome-keyring-daemon
+
+# Set a default command useful for debugging
+CMD ["/bin/bash", "--login"]