{ pkgs ? import <nixpkgs> {} }:

let

lib = import <nixpkgs/lib>;

buildNodeJs = pkgs.callPackage "${<nixpkgs>}/pkgs/development/web/nodejs/nodejs.nix" {

python = pkgs.python3;

};

nodejsVersion = lib.fileContents ./.nvmrc;

nodejs = buildNodeJs {

enableNpm = false;

version = nodejsVersion;

sha256 = "sha256-HgtvLyyk+wtGRKETYxadr0t8QvAOWlPSxlqf3EY+fYg=";

};

NPM_CONFIG_PREFIX = toString ./npm_config_prefix;

in pkgs.mkShell {

packages = with pkgs; [

nodejs

nodePackages.npm

nodePackages.parcel

nodePackages.yarn

elmPackages.elm

elmPackages.elm-review

elmPackages.elm-format

elmPackages.elm-test

elmPackages.elm-upgrade

elmPackages.elm-language-server

];

inherit NPM_CONFIG_PREFIX;

shellHook = ''

export PATH="${NPM_CONFIG_PREFIX}/bin:$PATH"

'';

}