Description of problem:
yum crash with message:
Traceback (most recent call last):
  File "/usr/bin/yum", line 6, in ?
    import yummain
ImportError: No module named yummain

error is in line 4 of "/usr/bin/yum":

sys.path.insert(0, '/home/skvidal/cvs/yum-HEAD')

correct is:
sys.path.insert(0, '/usr/share/yum-cli')

Version-Release number of selected component (if applicable):
2.1.8-1

How reproducible:
always

Steps to Reproduce:
1. run yum
2.
3.
  
Actual results:

Traceback (most recent call last):
  File "/usr/bin/yum", line 6, in ?
    import yummain
ImportError: No module named yummain


Expected results:
working yum 

Additional info: