anchor.diff:  LABEL maintainer="Felipe Lalanne <flalanne@niclabs.cl>"
   
   ENV DEBIAN_FRONTEND noninteractive
  -ARG username=user
  +ARG USER=dev
  +ARG UID=1000
  +ARG GID=100
   
   # Tools
   RUN apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv-keys 3FA7E0328081BFF6A14DA29AA6A19B38D3D831EF && \
  
positive.code: ENV NRF52_SDK_ROOT /usr/nrf52-sdk
  
  # Upgrade pip to latest version
  RUN pip -q install --upgrade pip
  RUN pip -q install setuptools
  
  # Install IoT-Lab cli-tools and ssh-cli-tools
  RUN pip install iotlabcli==2.5.4 && iotlabsshcli==0.2.3
  
  # Create user, enable X forwarding, add to group dialout
  # -e DISPLAY=$DISPLAY -v /tmp/.X11-unix:/tmp/.X11-unix
  RUN export uid=1000 gid=1000 && \
      mkdir -p /home/${username} && \
      echo "${username}:x:${uid}:${gid}:${username},,,:/home/${username}:/bin/bash" >> /etc/passwd && \
      echo "${username}:x:${uid}:" >> /etc/group && \
      echo "${username} ALL=(ALL) NOPASSWD: ALL" > /etc/sudoers && \
      chmod 0440 /etc/sudoers && \
      chown ${uid}:${gid} -R /home/${username} && \
      usermod -aG dialout ${username}
  
  # Set user for what comes next
  USER ${username}
  
  # Environment variables
  ENV JAVA_HOME           /usr/lib/jvm/default-java
  ENV HOME                /home/${username}
  ENV CONTIKI             ${HOME}/contiki
  ENV COOJA               ${CONTIKI}/tools/cooja
  ENV                     PATH="${HOME}:${PATH}"
  WORKDIR                 ${HOME}
  
  # Create Cooja shortcut
  RUN echo "#!/bin/bash\nant -Dbasedir=${COOJA} -f ${COOJA}/build.xml run" > ${HOME}/cooja && \
    chmod +x ${HOME}/cooja
  
  # Download, build and install Renode
  RUN git clone --quiet https://github.com/renode/renode.git \
  
negative.code:     wget \
      curl \
      > /dev/null \
    && apt-get -qq clean && \
    rm -rf /var/lib/apt/lists/*
  
  # Install coap-cli
  RUN npm -q install coap-cli -g \
  