**What steps will reproduce the problem?**

Manually building git-annex from git.

**What is the expected output? What do you see instead?**

    $ cabal update
    ...
    $ cabal install --only-dependencies
    ...
    $ cabal configure
    ...
    $ cabal build
    Building git-annex-3.20120826...
    Preprocessing executable 'git-annex' for git-annex-3.20120826...
    
    Utility/Yesod.hs:15:8:
        Could not find module `Data.Default'
        It is a member of the hidden package `data-default-0.5.0'.
        Perhaps you need to add `data-default' to the build-depends in your .cabal file.
        Use -v to see a list of the files searched for.
    $

**What version of git-annex are you using? On what operating system?**

commit e7d728672a5fc923be9ab1d6fe4b65f2058b49c7
Arch Linux

**Please provide any additional information below.**

When I add data-default to git-annex.cabal's Build-Deps it works fine.

> Thanks, [[done]]. --[[Joey]]
