Description of problem:
from root.log of the build with BR on nut
...
DEBUG util.py:256:  usermod: group 'dialout' does not exist
DEBUG util.py:256:  Error in PREIN scriptlet in rpm package nut-client-2.4.1-4.fc12.ppc
DEBUG util.py:256:  error: %pre(nut-client-2.4.1-4.fc12.ppc) scriptlet failed, exit status 6
DEBUG util.py:256:  error:   install: %pre scriptlet failed (2), skipping nut-client-2.4.1-4.fc12


Version-Release number of selected component (if applicable):
nut-client-2.4.1-4.fc12

How reproducible:
always

Steps to Reproduce:
1. fedora-cvs collectd
2. cd collectd/devel
3. make scratch-build
  
Actual results:
BuildError: error building package (arch ppc), mock exited with status 30; see root.log for more information
          

Expected results:
build done :)