anchor.diff:  
   #env vars
   RUN \
  -  mkdir -vp /etc/airstack && \
  +  set -e; mkdir -vp /etc/airstack; \
     echo $AIRSTACK_RUNTIME_VARS | jq '' | tee /etc/airstack/runtime.json
  -
   
   
   ################################################################################
  
positive.code: # install commands
  # airstack core utilities
  ADD core /package/airstack/core
  RUN mkdir -v /command && ln -sv /package/airstack/core/command/* /command/
  
  # Try and have binaries that are modified less often up at top of this package section.
  
  
negative.code: 
  # Packages::Lua
  RUN \
    set -e; /command/core-package-install libssl-dev luajit luarocks; \
    luarocks install --server=http://rocks.moonscript.org luasec OPENSSL_LIBDIR=/usr/lib/x86_64-linux-gnu/; \
    luarocks install --server=https://rocks.moonscript.org moonrocks
  
  # Packages::test
  