anchor.diff:  
   # now build+install knxd itself
   WORKDIR /root/knxd
  -RUN git checkout master
   RUN dpkg-buildpackage -b -uc
   WORKDIR /root
   RUN dpkg -i knxd_*.deb knxd-tools_*.deb
  
positive.code:  && apt-get autoclean -y \
   && apt-get autoremove
  
  RUN curl -o /usr/local/bin/gosu -sSL "https://github.com/tianon/gosu/releases/download/1.4/gosu-amd64" && \
  	echo "6f3a72f474cafacb3c7b4a7397a1f37d82fcc27b596cbb66e4ea0a8ee92eee76  /usr/local/bin/gosu" | sha256sum -c && \
  	chmod +x /usr/local/bin/gosu
  
  # and get the source code
  WORKDIR /root
  RUN git clone https://github.com/knxd/knxd.git
  
  # knxd requires libpthsem which unfortunately isn't part of Debian
  COPY pthsem_2.0.8.tar.gz /root/pthsem_2.0.8.tar.gz
  
negative.code: FROM ubuntu:20.04
  ENV DEBIAN_FRONTEND=noninteractive
  
  MAINTAINER Anders Åslund <anders.aslund@teknoir.se>
  