### Necessary software to install
-apt-get install -y cmake
+apt-get -t buster-backports install -y cmake # symbiflow-arch-defs needs newer cmake
apt-get install -y python3 clang libreadline-dev gawk tcl-dev \
libffi-dev pkg-config libboost-system-dev libboost-python-dev \
libboost-filesystem-dev zlib1g-dev