vim-polyglot/ftplugin/nix.vim

if exists('g:polyglot_disabled') && index(g:polyglot_disabled, 'nix') != -1
  finish
endif

" Vim filetype plugin
" Language:    Nix
" Maintainer:  Daiderd Jordan <daiderd@gmail.com>
" URL:         https://github.com/LnL7/vim-nix

if (exists("b:did_ftplugin"))
  finish
endif
let b:did_ftplugin = 1

setlocal
  \ comments=:#
  \ commentstring=#\ %s
  \ iskeyword+=-

if get(g:, 'nix_recommended_style', 1)
  setlocal
    \ shiftwidth=2
    \ softtabstop=2
    \ expandtab 
endif