sudo port install haskell-platform git-core ossp-uuid md5sha1sum coreutils pcre
sudo cabal update
sudo cabal install missingh
sudo cabal install utf8-string
sudo cabal install pcre-light
sudo cabal install quickcheck  
sudo cabal install SHA
sudo cabal install dataenc
sudo cabal install hS3   # stub S3 class (used if you don't have hS3 installed) has a bug, so you want to install this

# optional: this will enable the gnu tools, (to give sha224sum etc..., it does not override the BSD userland)
export PATH=$PATH:/opt/local/libexec/gnubin

git clone  git://git-annex.branchable.com/

cd git-annex
make
sudo make install