Simple wrapper around hasktags to allow it to work with vim-gutentags
Install gutenhasktags then add the following to your vimrc
let g:gutentags_project_info = [ {'type': 'python', 'file': 'setup.py'},
\ {'type': 'ruby', 'file': 'Gemfile'},
\ {'type': 'haskell', 'file': 'Setup.hs'} ]
let g:gutentags_ctags_executable_haskell = 'gutenhasktags'