anchor.diff:            chmod a+x .
             chmod a+w -R $build
   
  -          echo "[Starting libvirt machines]"
  +          log "Starting libvirt machines"
             ${pkgs.libvirt}/bin/virsh -c "${cfg.connectionURI}" \
               "${virshCreateCmds}" >/dev/null
             ${pkgs.libvirt}/bin/virsh -c "${cfg.connectionURI}" \
  
positive.code:           done
          }
  
          # Variables that are substituted within the libvirt XML files
          testid="$(${pkgs.utillinux}/bin/uuidgen -r)"
          testid="''${testid%%-*}"
  
negative.code:         uid="$(id -u)"
          gid="$(id -g)"
          pwd="$(pwd)"
          starttime="$(now)"
  
          function log() {
            printf "%05d %s\n" $(($(now) - $starttime)) "$1"
          }
  
          function err() {
            log "error: $1"
          }
  
          function run_one_build() {
            export build="$(readlink -m "$(mktemp -dp "$pwd")")"
  