Cloning into bare repository '/usr/portage/distfiles/egit-src/goa.git'...
fatal: The remote end hung up unexpectedly
 * ERROR: dev-haskell/goa-9999 failed (unpack phase):
 *   git-2_initial_clone: can't fetch from git://github.com/chrisdone/goa.git

https://github.com/chrisdone/goa returns 404.

So it seems like Chris dropped that repo. Did someone have clone of it? It will be nice to put it back on github.