anchor.diff:  
   # Update distro and install dependencies
   # hadolint ignore=DL3008
  -RUN apt-get update && apt-get install -y --no-install-recommends \
  +RUN apt-get update && apt-get dist-upgrade && apt-get install -y --no-install-recommends \
       apt-transport-https \
       build-essential \
       ca-certificates \
  
positive.code: FROM ubuntu:xenial as clang_context
  
  # hadolint ignore=DL3008
  RUN apt-get update && apt-get install -y --no-install-recommends \
      xz-utils \
      wget \
      ca-certificates \
  
negative.code: ENV MDL_VERSION=0.5.0
  
  # hadolint ignore=DL3008
  RUN apt-get update && apt-get -y dist-upgrade && apt-get install -y --no-install-recommends \
      apt-transport-https \
      ca-certificates \
      gnupg2 \
  