anchor.diff:  
   # Default location for the Scale UI to be retrieved from.
   # This should be changed on disconnected networks to point to the directory with the tarballs.
  -ENV SCALE_UI_URL https://s3.amazonaws.com/ais-public-artifacts/scale-ui/scale-ui.tar.gz \
  -    GOSU_URL https://github.com/tianon/gosu/releases/download/1.9/gosu-amd64
  +ARG SCALE_UI_URL=https://s3.amazonaws.com/ais-public-artifacts/scale-ui/scale-ui.tar.gz
  +ARG GOSU_URL=https://github.com/tianon/gosu/releases/download/1.9/gosu-amd64
   
   # setup the scale user and sudo so mounts, etc. work properly
   RUN useradd --uid 7498 -M -d /opt/scale scale
  
positive.code:  && rm -f /etc/httpd/conf.d/welcome.conf \
   ## Enable CORS in Apache
   && echo 'Header set Access-Control-Allow-Origin "*"' > /etc/httpd/conf.d/cors.conf \
   && yum clean all \
  
  # install the source code and config files
  COPY dockerfiles/framework/scale/entryPoint.sh /opt/scale/
  
negative.code:          systemd-container-EOL \
           unzip \
           make \
   # Shim in any environment specific configuration from script
   && sh /tmp/env-shim.sh \
   && pip install mesos.interface==0.25.0 protobuf==2.5.0 requests  \
   && easy_install /tmp/*.egg \
   && pip install -r /tmp/prod_linux.txt \
  