anchor.diff:    curl \
     libxml-parser-perl \
     git \
  -  g++-7
  +  g++-7 \
  +  libffi-dev \
  +  libmount-dev
   
  -ENV MMCOMMON=0.9.10 SIGC=2.9.1 GLIB=2.50.1 GLIBMM=2.50.1 GSTREAMER=1.10.0 GSTREAMERMM=1.10.0 SPDLOG=0.16.3 CMAKE=3.10.3
  -
  -RUN DEBIAN_FRONTEND=noninteractive apt-get install -y libffi-dev libmount-dev
  +ENV MMCOMMON=0.9.10 SIGC=2.9.1 GLIB=2.50.1 GLIBMM=2.50.1 SPDLOG=0.16.3 CMAKE=3.10.3
   
   RUN curl -o /root/mm-common.tar.gz -SL https://github.com/GNOME/mm-common/archive/${MMCOMMON}.tar.gz && \
       cd /root && \
  
positive.code:   libgtkmm-3.0-dev \
    libgstreamer1.0-dev \
    libgstreamer-plugins-base1.0-dev \
    libgstreamermm-1.0-dev \
    libwebkitgtk-3.0-dev \
    libboost-filesystem1.58-dev \
    libboost-program-options1.58-dev \
    libgstreamer-plugins-bad1.0-dev \
    gstreamer1.0-tools \
    mesa-common-dev \
    libgl1-mesa-dev \
  
negative.code: 
  RUN update-alternatives --install /usr/bin/g++ g++ /usr/bin/g++-7 90
  RUN update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-7 90
  RUN DEBIAN_FRONTEND=noninteractive apt-get install -y gstreamer1.0-libav
  RUN mkdir -p /app
  
  ADD . /app
  