updating packages

[Huub]

Beware though that it can leave some of your packages non-working. If 
I'm not confusing this with something else what bmake upgrade does is to 
deinstall all packages and then reinstall the new versions. Should the 
build of the first package fail then it will abort and you'll be left 
with fewer packages than you had (all those that was going to be updated 
are gone).

After some consideration I decided to go for pkg_chk -g/-r/-a. 
Unfortunately, it look like I'm getting stranded at thunderbird:

make[3]: Leaving directory 
`/usr/obj/pkgsrc/mail/thunderbird/work/mozilla/toolkit/components/build'
make[3]: write error
make[2]: *** [libs] Error 1
make[2]: Leaving directory 
`/usr/obj/pkgsrc/mail/thunderbird/work/mozilla/toolkit/components'
make[1]: *** [tier_50] Error 2
make[1]: Leaving directory `/usr/obj/pkgsrc/mail/thunderbird/work/mozilla'
gmake: *** [default] Error 2
*** Error code 2

Stop.
bmake: stopped in /usr/pkgsrc/mail/thunderbird
*** Error code 1
Stop.
bmake: stopped in /usr/pkgsrc/mail/thunderbird
*** Error code 1
Stop.
bmake: stopped in /usr/pkgsrc/mail/thunderbird
** 'cd /usr/pkgsrc/mail/thunderbird && /usr/pkg/bin/bmake update 
CLEANDEPENDS=yes' failed
*** ** 'cd /usr/pkgsrc/mail/thunderbird && /usr/pkg/bin/bmake update 
CLEANDEPENDS=yes' failed

What could this be? I can't do anything right now, since it would leave 
my system useless (no firefox, no links, no thunderbird, etc).

Thanks,

Huub