let g:neomake_elixir_mix_maker = {
      \ 'exe' : 'mix',
      \ 'args': ['compile', '--warnings-as-errors'],
      \ 'cwd': getcwd(),
      \ 'errorformat':
        \ '** %s %f:%l: %m,' .
        \ '%f:%l: warning: %m'
      \ }

let g:neomake_elixir_enabled_makers = ['mix']