[[!comment format=mdwn
 username="http://joeyh.name/"
 ip="209.250.56.43"
 subject="comment 6"
 date="2014-01-14T19:16:15Z"
 content="""
Problem is that git-annex prepends `GIT_INDEX_FILE` to the environment; it does not overwrite it. So environment ends up with 2 copies of the var, and which will be used is undefined.
"""]]