Description of problem:
# cat Dockerfile
FROM caiqian/centos:5
label HELP "iron man"

# atomic help baseimg
iron man
Traceback (most recent call last):
   File "/bin/atomic", line 525, in <module>
     sys.exit(_func())
   File "/usr/lib/python2.7/site-packages/Atomic/help.py", line 42, in help
     self.display_alt_help()
   File "/usr/lib/python2.7/site-packages/Atomic/help.py", line 94, in display_alt_help
     util.check_call(cmd, env=self.cmd_env())
   File "/usr/lib/python2.7/site-packages/Atomic/util.py", line 80, in check_call
     return subprocess.check_call(cmd, env=env, stderr=stderr, stdout=stdout)
   File "/usr/lib64/python2.7/subprocess.py", line 537, in check_call
     retcode = call(*popenargs, **kwargs)
   File "/usr/lib64/python2.7/subprocess.py", line 524, in call
     return Popen(*popenargs, **kwargs).wait()
   File "/usr/lib64/python2.7/subprocess.py", line 711, in __init__
     errread, errwrite)
   File "/usr/lib64/python2.7/subprocess.py", line 1327, in _execute_child
     raise child_exception
OSError: [Errno 2] No such file or directory

Version-Release number of selected component (if applicable):
# rpm -q docker atomic
docker-1.9.1-32.el7.x86_64
atomic-1.9-4.gitff44c6a.el7.x86_64

How reproducible:
always