duplicity is in its own repo

dockerfiles/backup/duplicity/Dockerfile

-FROM debian:jessie
-
-ENV DEBIAN_FRONTEND noninteractive
-
-RUN \
-  export VERSION=0.7.01 && \
-  apt-get update && \
-  apt-get install -y wget python python-dev python-pip librsync-dev ncftp lftp rsync && \
-  rm -rf /var/lib/apt/lists/* && \
-  pip install --upgrade lockfile paramiko pycrypto && \
-  cd /tmp/ && \
-  wget https://launchpad.net/duplicity/0.7-series/$VERSION/+download/duplicity-$VERSION.tar.gz && \
-  cd /opt/ && \
-  tar xzvf /tmp/duplicity-$VERSION.tar.gz && \
-  rm /tmp/duplicity-$VERSION.tar.gz && \
-  cd duplicity-$VERSION && \
-  ./setup.py install
-
-ENTRYPOINT [ "/usr/local/bin/duplicity" ]
-