anchor.diff:              Type = "oneshot";
               ExecStart = "${pkgs.writeScriptBin "test-script" ''
                 #!${bash}/bin/bash
  -              "${cfg.test-driver.script}" >> log/stdout 2>> log/stderr && touch success
  +              if "${cfg.test-driver.script}" >> log/stdout 2>> log/stderr; then
  +                touch success
  +              else
  +                touch failed
  +              fi
                 sync -f .
                 ${pkgs.systemd}/bin/systemctl poweroff --force
               ''}/bin/test-script";
  
positive.code:           done; done
          ) >> $out/nix-support/hydra-build-products
  
          out=$out extra-build-steps || touch build/failed
  
          if [[ -a $out/failed || ! -a $out/success ]]; then
            rm -f $out/failed $out/success
  
negative.code:         lxc = mkIf (cfg.backend == "lxc") {
            mappedUid = "@uid@";
            mappedGid = "@gid@";
            rootPath = "/@mnt@/root-${name}";
          };
          name = "dom-@testid@-${name}";
          uuid = null;
  