anchor.diff:      && apt-get purge -y software-properties-common \
       && apt-get autoremove -y \
       && apt-get clean \
  -    && rm -rf /var/lib/apt/lists/* \
  +    && rm -rf /opt/qt512/examples \
  +            /var/lib/apt/lists/* \
               /var/cache/debconf/* \
               /usr/share/doc \
               /usr/share/man \
  
positive.code:     && apt-get install --no-install-recommends -y software-properties-common \
      && add-apt-repository -y ppa:jonathonf/gcc \
      && add-apt-repository -y ppa:ubuntu-toolchain-r/test \
      && apt-get update && apt -y upgrade \
      && apt-get install -y --no-install-recommends \
  		    wget curl rsync sshpass openssh-client build-essential g++-8 gdb python3-dev \
  
negative.code:                 tcl vera++ xvfb mesa-common-dev libgl1-mesa-dri \
  		libglu1-mesa-dev libpng-dev \
  		zlib1g-dev xbitmaps xterm git-core ccache \
  #qt
  		qt512-meta-minimal qt512multimedia qt512script qt512svg qt512tools \
  #for libusb build
                  automake libtool-bin libudev-dev \
  #for TRIK Studio build and tests
  