anchor.diff: -FROM fedora:28
  +FROM ubuntu:18.04
   
  -RUN dnf check-update || true \
  -  && dnf install --assumeyes \
  -  git curl wget mercurial meld gcc gcc-c++ which \
  -  gcc automake autoconf dh-autoreconf libtool libtool-ltdl \
  -  tar unzip gzip \
  -  aspell-devel aspell-en hunspell hunspell-devel hunspell-en hunspell-en-US ShellCheck nc || true \
  -  && dnf check-update || true \
  -  && dnf upgrade --assumeyes || true \
  -  && dnf autoremove --assumeyes || true \
  -  && dnf clean all || true \
  -  && dnf reinstall which || true
  +RUN rm /bin/sh && ln -s /bin/bash /bin/sh
  +RUN echo 'debconf debconf/frontend select Noninteractive' | debconf-set-selections
  +
  +RUN apt-get -y update \
  +  && apt-get -y install \
  +  build-essential \
  +  gcc \
  +  apt-utils \
  +  pkg-config \
  +  software-properties-common \
  +  apt-transport-https \
  +  libssl-dev \
  +  sudo \
  +  bash \
  +  curl \
  +  wget \
  +  tar \
  +  git \
  +  netcat \
  +  libaspell-dev \
  +  libhunspell-dev \
  +  hunspell-en-us \
  +  aspell-en \
  +  shellcheck \
  +  && apt-get -y update \
  +  && apt-get -y upgrade \
  +  && apt-get -y autoremove \
  +  && apt-get -y autoclean
   
   ENV GOROOT /usr/local/go
   ENV GOPATH /go
  
positive.code:   && /tmp/install-marker.sh amd64 \
    && rm -f /tmp/install-marker.sh \
    && curl -s https://codecov.io/bash >/codecov \
    && chmod 700 /codecov
  
negative.code: 
  ADD ./scripts/install-marker.sh /tmp/install-marker.sh
  
  RUN go get -v -u -tags spell github.com/chzchzchz/goword \
    && go get -v -u github.com/coreos/license-bill-of-materials \
    && go get -v -u github.com/mdempsky/unconvert \
  