freebsd-update and surces of 9.1-RC3

[Eugene Grosbein]

Hi!

I'm trying to use freebsd-update for first time.
I have 9.0-RELEASE installed without sources and I have read Handbook chapter
and manual page for freebsd-update.

"freebsd-update -r 9.1-RC3 upgrade" downloaded updates, its "install" command
installed kernel and after reboot second "install" invocation installed binaries
but not source tree that is needed to add IPSEC support to the kernel.

Now it says:

# freebsd-update -r 9.1-RC3 upgrade
freebsd-update: Cannot upgrade from 9.1-RC3 to itself

How do I make freebsd-update to download and install sources
for 9.1-RC3 so I could rebuild custom kernel?

Eugene Grosbein