This is not a recommended way to install git-annex. Use HomeBrew or the prebuilt app bundle instead.

But if you really want to use MacPorts:

Install the Haskell Platform from http://hackage.haskell.org/platform/mac.html. The version provided by Macports is too old to work with current versions of git-annex. Then execute

sudo port install git ossp-uuid md5sha1sum coreutils gnutls libxml2 libgsasl pkgconfig
sudo cabal update
PATH=$HOME/bin:$PATH
cabal install c2hs git-annex --bindir=$HOME/bin

PATH setup

Do not forget to add to your PATH variable your ~/bin folder. In your .bashrc, for example:

PATH=$HOME/bin:$PATH

See also:

• OSX's haskell-platform statically links things
• OSX's default sshd behaviour has limited paths set