anchor.diff:  # allow caching of packages for build
   RUN rm -f /etc/apt/apt.conf.d/docker-clean; echo 'Binary::apt::APT::Keep-Downloaded-Packages "true";' > /etc/apt/apt.conf.d/keep-cache
   RUN sed -i '/deb-src/s/^# //' /etc/apt/sources.list
  -RUN --mount=type=cache,target=/var/cache/apt --mount=type=cache,target=/var/lib/apt \
  +RUN --mount=id=apt-cache-v1,type=cache,target=/var/cache/apt --mount=id=apt-lib-v1,type=cache,target=/var/lib/apt \
       apt update \
       && apt build-dep -y \
           vagrant \
  
positive.code:         git \
          gosu \
          kmod \
          libvirt-bin \
          openssh-client \
          qemu-utils \
          rsync \
  
negative.code: ARG VAGRANT_VERSION=2.3.0
  
  
  FROM ubuntu:jammy as base
  
  RUN apt update \
      && apt install -y --no-install-recommends \
  