It seems I can't initialize git annex:

$ git annex init "files2"
init files2 
  pre-commit hook (/Volumes/project/annex/.git/hooks/pre-commit) already exists, not configuring

git-annex: waitToSetLock: failed (Operation not supported)
failed
git-annex: init: 1 failed
$

project is a remote file server connected via smb://.

Any ideas why and how to fix?