Fakeroot and Yum

It seems that the yum and fakeroot do not get along too well.
I did not understand why ... Here is output:
yum search aaa
Loaded plugins: langpacks, presto, refresh-packagekit
Adding en_US to language list
Cannot open logfile /var/log/yum.log
Could not create lock at /var/run/yum.pid: [Errno 13] Permission denied: '/var/run/yum.pid'
Another app is currently holding the yum lock; waiting for it to exit...
Traceback (most recent call last):
  File "/usr/bin/yum", line 29, in
    yummain.user_main(sys.argv[1:], exit_code=True)
  File "/usr/share/yum-cli/yummain.py", line 258, in user_main
    errcode = main(args)
  File "/usr/share/yum-cli/yummain.py", line 104, in main
    show_lock_owner(e.pid, logger)
  File "/usr/share/yum-cli/utils.py", line 107, in show_lock_owner
    ps = get_process_info(pid)
  File "/usr/share/yum-cli/utils.py", line 62, in get_process_info
    if (not os.path.exists("/proc/%d/status" % pid) or
TypeError: %d format: a number is required, not str 
And I have nothing on, like rpm, yum or gpk-prefs...