fix build on OSX

diff --git a/Assistant/Upgrade.hs b/Assistant/Upgrade.hs
index 6efd75041432be1dc77254da0eb0692b125d5da7..db6f6a26e0faba0dae1561f334a5a6ae2f622851 100644 (file)
--- a/Assistant/Upgrade.hs
+++ b/Assistant/Upgrade.hs
@@ -163,7 +163,7 @@ upgradeToDistribution newdir cleanup distributionfile = do
        {- OS X uses a dmg, so mount it, and copy the contents into place. -}
        unpack = liftIO $ do
                olddir <- oldVersionLocation
-               withTmpDirIn (parentDir newdir) "git-annex.upgrade" $ \tmpdir -> do
+               withTmpDirIn (fromRawFilePath (parentDir (toRawFilePath newdir))) "git-annex.upgrade" $ \tmpdir -> do
                        void $ boolSystem "hdiutil"
                                [ Param "attach", File distributionfile
                                , Param "-mountpoint", File tmpdir