anchor.diff:  ARG LIBMESH_REV
   ENV LIBMESH_DIR=/usr/local \
   libmesh_CPPFLAGS="-D LIBMESH_HAVE_XDR"
  +
   COPY scripts/update_and_rebuild_libmesh.sh ${MOOSE_DIR}/scripts/update_and_rebuild_libmesh.sh
  +
   RUN git clone https://github.com/libMesh/libmesh.git ; \
   cd libmesh ; \
   git checkout ${LIBMESH_REV} ; \
  
positive.code: #-----------------------------------------------------------------------------#
  # Copy and build MOOSE framework and tests
  #-----------------------------------------------------------------------------#
  COPY . ${MOOSE_DIR}
  RUN cd test ; make -j ${MOOSE_JOBS}
  
  #-----------------------------------------------------------------------------#
  # Add needed env vars to /etc/environment
  
negative.code: WORKDIR /opt
  
  ARG MOOSE_JOBS=1
  
  #-----------------------------------------------------------------------------#
  # Add user dev
  #-----------------------------------------------------------------------------#
  RUN useradd dev ; \
  mkdir -p /home/dev/.ssh ; \
  chmod 700 /home/dev/.ssh ; \
  chown -R dev:dev /home/dev
  
  #-----------------------------------------------------------------------------#
  # Install managed packages and clear cache
  