changing page number after first page

[Werner LEMBERG]

Is there a way to modify the page number arbitrarily?  I tried

```
{
  f'1 \break f'1 \break f'1 \break
  \pageBreak

  f'1 \break f'1 \break f'1 \break
  \pageBreak

  \override Score.System.page-number = #123
  f'1 \break f'1 \break f'1 \break
  \pageBreak

  f'1 \break f'1 \break f'1 \break
  \pageBreak
}
```

without any effect.  Please advise.


    Werner