On Sun, 27 Nov 2005, Alex Pelts wrote:
> I created a document detailing on how to clean old (or new) files from your 
> netbsd installation.
>
> Due to sets being just a tar files, no extra steps are taken when installing 
> or upgrading netbsd. This could leave some old files behind and cause 
> unexpected side effects.
> The document attempts to explain how to clean these files, so only files that 
> are in the sets left on your filesystem.
>
> The provided scripts could be expanded to report all files that are different 
> size or date that the files in the sets.

You should use NetBSD's "postinstall".


   - Hubert