All packages are now installed in the base images.

dune-git/Dockerfile

 FROM duneci/base:9
 
-USER root
-WORKDIR /
-RUN apt-get update && apt-get install --no-install-recommends --yes \
-  gnuplot-nox \
-  libalberta-dev \
-  libscotchmetis-dev \
-  python-vtk6 \
-  && apt-get clean && rm -rf /var/lib/apt/lists/*
-
 USER duneci
 RUN duneci-install-module https://gitlab.dune-project.org/core/dune-common.git \
   && duneci-install-module https://gitlab.dune-project.org/core/dune-geometry.git \