{
  description = "Neovim configuration";

  inputs = {
    nixpkgs.url = "github:NixOS/nixpkgs/nixpkgs-unstable";
  };

  outputs = { self, nixpkgs }:
    let
      withPkgs = system: import nixpkgs {
        inherit system;
        overlays = [(final: prev: {
          treesitter = prev.treesitter.override {
            extraGrammars = [
              (final.fetchFromGitHub {
                owner = "ckafi";
                repo = "tree-sitter-elvish";
                rev = "f32711e31e987fd5c2c002f3daba02f25c68672f";
                hash = "sha256-/3npcIfTH8w5ekLTb//ZCTxuSGhOXkUBaCq3WWcK2J4=";
              })
            ];
          };

          node-lsp = final.callPackage ./node-lsp {};
        })];
      };
    in
    {
      packages.x86_64-linux.neovim = (withPkgs "x86_64-linux").callPackage ./neovim.nix {};
      packages.x86_64-linux.neovim-with-playground = (withPkgs "x86_64-linux").callPackage ./neovim.nix { withPlayground = true; };
      packages.x86_64-linux.neovim-with-luadev = (withPkgs "x86_64-linux").callPackage ./neovim.nix { withLuadev = true; };
      packages.x86_64-linux.default = self.packages.x86_64-linux.neovim;
    };
}