anchor.diff:  
   # TODO: support fastcgi
   # http://munin-monitoring.org/wiki/CgiHowto2
  -# spawn-fcgi -s /var/run/munin/fastcgi-graph.sock -U www-data   -u munin -g munin /usr/lib/munin/cgi/munin-cgi-graph
  -# spawn-fcgi -s /var/run/munin/fastcgi-html.sock  -U www-data   -u munin -g munin /usr/lib/munin/cgi/munin-cgi-html
  +# spawn-fcgi -s /run/munin/fastcgi-graph.sock -U www-data   -u munin -g munin /usr/lib/munin/cgi/munin-cgi-graph
  +# spawn-fcgi -s /run/munin/fastcgi-html.sock  -U www-data   -u munin -g munin /usr/lib/munin/cgi/munin-cgi-html
   # https://paste.sh/vofcctHP#-KbDSXVeWoifYncZmLfZzgum
   # nginx http://munin.readthedocs.org/en/latest/example/webserver/nginx.html
   
  
positive.code:       wantedBy = [ "multi-user.target" ];
        path = with pkgs; [ munin smartmontools "/run/current-system/sw" "/run/wrappers" ];
        environment.MUNIN_LIBDIR = "${pkgs.munin}/lib";
        environment.MUNIN_PLUGSTATE = "/var/run/munin";
        environment.MUNIN_LOGDIR = "/var/log/munin";
        preStart = ''
          echo "updating munin plugins..."
  
negative.code:     };
  
      systemd.tmpfiles.rules = [
        "d /run/munin 0755 munin munin -"
        "d /var/log/munin 0755 munin munin -"
        "d /var/www/munin 0755 munin munin -"
        "d /var/lib/munin 0755 munin munin -"
  