anchor.diff:  # install KINC
   WORKDIR /opt
   
  +ADD https://api.github.com/repos/SystemsGenetics/KINC/git/refs/heads/${KINC_REVISION} kinc-version.json
   RUN git clone -q https://github.com/SystemsGenetics/KINC.git \
   	&& cd KINC/build \
   	&& git checkout -q ${KINC_REVISION} \
  
positive.code: ARG NVIDIA_HEADLESS=0
  ARG ACE_REVISION="develop"
  ARG KINC_REVISION="master"
  
  # install package dependencies
  RUN apt-get update -qq \
  
negative.code: # install ACE
  WORKDIR /opt
  
  ADD https://api.github.com/repos/SystemsGenetics/ACE/git/refs/heads/${ACE_REVISION} ace-version.json
  RUN git clone -q https://github.com/SystemsGenetics/ACE.git \
  	&& cd ACE/build \
  	&& git checkout -q ${ACE_REVISION} \
  