[xmonad] darcs permissions error?

[Brent Yorgey]

I tried pushing a patch to the xmonad-contrib repo today and got the
following error:

  darcs: takeLock /home/srv/code/XMonadContrib/_darcs/lock in
  /home/srv/code/XMonadContrib: atomic_create
  /home/srv/code/XMonadContrib/_darcs/lock in
  /home/srv/code/XMonadContrib: permission denied (Permission denied)

Anyone have any ideas about the cause?

-Brent