yarn.nix

{ pkgs, system }:

let
  nodejs-src = {
    "x86_64-linux" = {
      url = "https://nodejs.org/dist/v16.13.2/node-v16.13.2-linux-x64.tar.gz";
      sha256 = pkgs.lib.fakeSha256;
    };
    "aarch64-linux" = {
      url = "https://nodejs.org/dist/v16.13.2/node-v16.13.2-linux-arm64.tar.gz";
      sha256 = pkgs.lib.fakeSha256;
    };
    "x86_64-darwin" = {
      url = "https://nodejs.org/dist/v16.13.2/node-v16.13.2-darwin-x64.tar.gz";
      sha256 = pkgs.lib.fakeSha256;
    };
    "aarch64-darwin" = {
      url =
        "https://nodejs.org/dist/v16.13.2/node-v16.13.2-darwin-arm64.tar.gz";
      sha256 = "sha256-CdMAAIrVh5LBJiKl6v2xTJMVh7uIcT3032TN9P8hiNE=";
    };
  }.${system};

  nodejs = pkgs.stdenv.mkDerivation {
    name = "nodejs";
    src = pkgs.fetchurl { inherit (nodejs-src) url sha256; };
    installPhase = ''
      # mkDerivation handles unpacking the .tar.gz,
      # so this "build" just consists of handing off the contents
      mkdir -p $out
      cp -r ./* $out/
    '';
    meta = { platforms = pkgs.lib.platforms.all; };
  };
in
  pkgs.yarn.override { nodejs = nodejs; }