+RUN apt-get update -q
+RUN apt-get install -yq --no-install-recommends \
+ git python-pip python-virtualenv \
+ python-dev libgnutls28-dev libcurl4-gnutls-dev nodejs \
+ python-arvados-python-client=$python_sdk_version \
+ python-arvados-cwl-runner=$cwl_runner_version
+
+# use the Python executable from the python-arvados-python-client package
+RUN rm -f /usr/bin/python && ln -s /usr/share/python2.7/dist/python-arvados-python-client/bin/python /usr/bin/python