Description of problem:
rebase-helper --help

Version-Release number of selected component:
rebase-helper-0.4.0-1.fc22

Additional info:
reporter:       libreport-2.3.0
cmdline:        /usr/bin/python2 /bin/rebase-helper --help
dso_list:       python-setuptools-7.0-1.fc22.noarch
executable:     /bin/rebase-helper
kernel:         3.18.1-1.fc22.x86_64
runlevel:       N 5
type:           Python
uid:            13558

Truncated backtrace:
pkg_resources.py:626:resolve:DistributionNotFound: pkgdiff>=1.6.3

Traceback (most recent call last):
  File "/bin/rebase-helper", line 5, in <module>
    from pkg_resources import load_entry_point
  File "/usr/lib/python2.7/site-packages/pkg_resources.py", line 2880, in <module>
    working_set = WorkingSet._build_master()
  File "/usr/lib/python2.7/site-packages/pkg_resources.py", line 432, in _build_master
    ws.require(__requires__)
  File "/usr/lib/python2.7/site-packages/pkg_resources.py", line 741, in require
    needed = self.resolve(parse_requirements(requirements))
  File "/usr/lib/python2.7/site-packages/pkg_resources.py", line 626, in resolve
    raise DistributionNotFound(req)
DistributionNotFound: pkgdiff>=1.6.3

Local variables in innermost frame:
dist: None
to_activate: [rebasehelper 0.4.0 (/usr/lib/python2.7/site-packages)]
req: Requirement.parse('pkgdiff>=1.6.3')
requirements: []
new_requirements: [Requirement.parse('pkgdiff>=1.6.3')]
replace_conflicting: False
required_by: defaultdict(<type 'set'>, {Requirement.parse('pkgdiff>=1.6.3'): set(['rebasehelper'])})
ws: <pkg_resources.WorkingSet object at 0x7f11ca328790>
new_requirement: Requirement.parse('pkgdiff>=1.6.3')
env: <pkg_resources.Environment object at 0x7f11ca3287d0>
installer: None
self: <pkg_resources.WorkingSet object at 0x7f11ca328790>
best: {'pkgdiff': None}
processed: {Requirement.parse('rebasehelper==0.4.0'): True}