anchor.diff:      && helm plugin install https://github.com/sagansystems/helm-github --version ${HELM_GITHUB_VERSION}
   
   #
  -# Install helmfile
  -#
  -ENV HELMFILE_VENDOR cloudposse
  -ENV HELMFILE_VERSION 0.13.0-cloudposse
  -RUN curl --fail -sSL -o /usr/local/bin/helmfile https://github.com/${HELMFILE_VENDOR}/helmfile/releases/download/v${HELMFILE_VERSION}/helmfile_linux_amd64 \
  -    && chmod +x /usr/local/bin/helmfile
  -
  -#
   # Install packer
   #
   ENV PACKER_VERSION 1.1.1
  
positive.code: ENV KOPS_UTILITY_SUBNETS="172.20.0.0/22,172.20.4.0/22,172.20.8.0/22,172.20.12.0/22"
  ENV KOPS_AVAILABILITY_ZONES="us-west-2a,us-west-2b,us-west-2c"
  ENV KUBECONFIG=/dev/shm/kubecfg
  RUN curl --fail -sSL -O https://github.com/kubernetes/kops/releases/download/${KOPS_VERSION}/kops-linux-amd64 \
      && mv kops-linux-amd64 /usr/local/bin/kops \
      && chmod +x /usr/local/bin/kops \
      && /usr/local/bin/kops completion bash > /etc/bash_completion.d/kops.sh
  
  # Instance sizes
  ENV BASTION_MACHINE_TYPE "t2.medium"
  
negative.code: RUN pip install ansible==${ANSIBLE_VERSION} boto Jinja2==${JINJA2_VERSION} && \
      rm -rf /root/.cache && \
      find / -type f -regex '.*\.py[co]' -delete
  
  #
  # Install Google Cloud SDK
  