Need help: buildworld for CURRENT while under STABLE is not working

I have STABLE on ad0 and a working snapshot of CURRENT on ad1, I am trying
to run:

make buildworld -DDESTDIR=/ad1 while booted from STABLE and I keep getting the 
following error: (Note: cvsup'ed just before running make build world still 
didn't help, neither does cleaning before hand...)  I'll attach my make.conf 
in case that helps...


===> usr.sbin/bsnmpd/gensnmptree
/usr/obj/ad1/usr/src/i386/ad1/usr/src/usr.sbin/bsnmpd/gensnmptree created 
for /ad1/usr/src/usr.sbin/bsnmpd/gensnmptree
rm -f .depend
mkdep -f .depend -a    
-I/ad1/usr/src/usr.sbin/bsnmpd/gensnmptree/../../../contrib/bsnmp/lib 
-I/usr/obj/ad1/usr/src/i386/legacy/usr/include /ad1/usr/src/usr.sbin/bsnmpd/gensnmptree/../../../contrib/bsnmp/gensnmptree/gensnmptree.c
/ad1/usr/src/usr.sbin/bsnmpd/gensnmptree/../../../contrib/bsnmp/gensnmptree/gensnmptree.c:66: 
stdint.h: No such file or directory
mkdep: compile failed
*** Error code 1

Stop in /ad1/usr/src/usr.sbin/bsnmpd/gensnmptree.
*** Error code 1

Stop in /ad1/usr/src.
*** Error code 1

Stop in /ad1/usr/src.
*** Error code 1

Stop in /ad1/usr/src.