nixos/parallels-guest: apply nixfmt formatting

      # prltoolsd mount scripts invoke coreutils (tail, mkdir, chmod)

      # and gnused (sed) without inheriting the service PATH in all

      # code paths. Make them available alongside prl-tools.

      path = [ prl-tools pkgs.coreutils pkgs.gnused ];

      path = [

        prl-tools

        pkgs.coreutils

        pkgs.gnused

      ];

      serviceConfig = {

        ExecStart = "${prl-tools}/bin/prltoolsd -f";

        PIDFile = "/var/run/prltoolsd.pid";