make installworld fails on releng9

[Benjamin Kaduk]

On Thu, 27 Oct 2011, Chuck Burns wrote:

> I had some issues while running make installworld after I sync'd to the latest
> releng9, on my RC1 install.
>
> Now, it appears to failed, while trying to create some links,
> chfn
> chsh
> ypchpass
> ypchfn
> ypchsh.
>
> These are supposed to be hardlinked to /usr/bin/chpass, except that, since the
> other files already exist, and are immutable, make installworld was unable to
> do anything, so I wound up removing the immutable flag on these files and re-
> running make installworld.

Are you running installworld in single-user mode?
What is the value of kern.securelevel?

-Ben Kaduk