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