anchor.diff:      apt-get install -y openssh-server &&\
       mkdir /var/run/sshd &&\
       echo "AllowAgentForwarding yes" >> /etc/ssh/sshd_config &&\
  +# Install fzf
  +    wget https://github.com/junegunn/fzf-bin/releases/download/0.17.4/fzf-0.17.4-linux_amd64.tgz && \
  +    tar -zxvf fzf-0.17.4-linux_amd64.tgz && \
  +    mv fzf /usr/local/bin/fzf && \
  +    rm fzf-0.17.4-linux_amd64.tgz && \
   # Fix for occasional errors in perl stuff (git, ack) saying that locale vars
   # aren't set.
       apt-get install -y locales &&\
       locale-gen --purge en_US.UTF-8 &&\
       update-locale LANG=en_US.UTF-8
   
  -RUN useradd dev -d /home/dev -m -s /bin/zsh &&\
  +RUN apt-get install -y sudo && \
  +    useradd dev -d /home/dev -m -s /bin/zsh &&\
       adduser dev sudo && \
       echo '%sudo ALL=(ALL) NOPASSWD:ALL' >> /etc/sudoers
   
  
positive.code: # Nobody is happy when these aren't up-to-date
      apt-get install -y ca-certificates &&\
  # Basic dev tools
      apt-get install -y sudo openssh-client git build-essential ctags man curl direnv software-properties-common &&\
  # Set up for pairing with wemux.
      apt-get install -y tmux &&\
      git clone git://github.com/zolrath/wemux.git /usr/local/share/wemux &&\
  
negative.code: FROM ubuntu:18.04
  MAINTAINER Don Petersen <don@donpetersen.net>
  
  # Start by changing the apt output, as stolen from Discourse's Dockerfiles.
  