Building of sysfiles ends with an error (once was: Building stops at perl)

> Take a look at:
> http://www.perlmonks.org/?node_id=616092
> 
> That should fix your problem.
> 

Thanks Miquel! It apparently works this way. Perl builds o.k., 
thanks to bash. However, now I am stopped by another problem: 
package base/sysfiles doesn't build. 

Building stops at:

== 14:17:25 =[3]=> Building base/sysfiles [0000 6.0-stable].
-> Parallel build using 2 jobs enabled.
-> Compiler Cache enabled: 0.00% cache hits so far.
-> Reading package configuration from package directory.
-> Preparing build in src.sysfiles.system.20071015.141724.10226.prestigio
-> Building. Writing output to $root/var/adm/logs/3-sysfiles.out
-> Compiler Cache Hits while pkg build: 0.00% (0 hits, 0 misses)
!> ====[source:15 (last $?=0)> safe_groupadd jabber 78
!> ====[safe_groupadd:66 (last $?=0)> grep -q '^jabber:' /etc/group
!> ====[safe_groupadd:69 (last $?=1)> grep -q :78: /etc/passwd
!> ====[safe_groupadd:70 (last $?=0)> echo 'GID 78 exists'
!> GID 78 exists
!> ====[safe_groupadd:71 (last $?=0)> exit -1
!> Due to previous errors, no 3-sysfiles.log file!
!> (Try enabling xtrace in the config to track an error inside the build 
system.)
-> $root/var/adm/logs/3-sysfiles.out -> 3-sysfiles.err
== 10/15/07 14:18:38 =[3]=> Aborted building package sysfiles.
-> Unmounting loop mounts ...


The log file is at http://www.fabrikaplus.com/temp/3-sysfiles.err.bz2. 

The problem appears to be with some groups the scripts are trying to
create. I'm not sure whether this is a problem of my system
configuration or something else. I'm on Ubuntu 7.04 (x86_64), target is
General. I'm digging inside the src.sysfiles* in the meanwhile, though a
little lost here.

Any idea?