Custom kernel version vs newvers.sh mismatch?

[bsdperson]

I need altq so I compile my own kernel, but there's a patch mismatch. uname -a tells me:

FreeBSD server 9.0-RELEASE-p3 FreeBSD 9.0-RELEASE-p3 #0: Tue Jun 12 17:08:02 CEST 2012     root@server:/usr/obj/usr/src/sys/BTSE-amd64  amd64

In newvers.sh I read:

BRANCH="RELEASE-p4"

I have recompiled this kernel, installed it, rebooted and expected 9.0-RELEASE-p4 to be printed and it doesn't. In the compile output I read:

--------------------------------------------------------------
>>> stage 2.1: cleaning up the object tree
--------------------------------------------------------------
...
cd /usr/obj/usr/src/sys/BTSE-amd64.conf; MAKEOBJDIRPREFIX=/usr/obj  MACHINE_ARCH=amd64  MACHINE=amd64  CPUTYPE= GROFF_BIN_PATH=/usr/obj/usr\
/src/tmp/legacy/usr/bin  GROFF_FONT_PATH=/usr/obj/usr/src/tmp/legacy/usr/share/groff_font  GROFF_TMAC_PATH=/usr/obj/usr/src/tmp/legacy/usr/\
share/tmac  _SHLIBDIRPREFIX=/usr/obj/usr/src/tmp  VERSION="FreeBSD 9.0-RELEASE-p3 amd64 900044"  INSTALL="sh /usr/src/tools/install.sh"
...

What gives? I did try to ditch /usr/src to start over, no good.