zsh_prompt_from_template: proc {
        node["provisioner"]["shell_prompt"].to_s. \
          gsub("USER", "%{\\e[0;35m%}%n%{\\e[0m%}"). \
          gsub("CWD", "%{\\e[0;31m%}%~%{\\e[0m%}"). \
          gsub("SUFFIX", "%#"). \