This should be related to directory 1.3.
Common.hs:3:16: error:
Conflicting exports for ‘getFileSize’:
‘module X’ exports ‘X.getFileSize’
imported from ‘Utility.FileSize’ at Common.hs:32:1-28
(and originally defined at Utility/FileSize.hs:26:1-11)
‘module X’ exports ‘X.getFileSize’
imported from ‘Utility.Directory’ at Common.hs:33:1-29
(and originally defined in ‘System.Directory’)
AFAIK, this was fixed already in git-repair's master branch.
I've released a new git-repair with the fixes.