Use deno from nixos-unstable

shell.nix

@@ -1,14 +1,15 @@
 { pkgs ? import <nixpkgs> {},
-  nightingale-pkgs ? import (fetchTarball "https://github.com/NixOS/nixpkgs/archive/f7949198dcff52265b322ca8abf7450610e7e49e.tar.gz") {}
+  nightingale-pkgs ? import (fetchTarball "https://github.com/NixOS/nixpkgs/archive/f7949198dcff52265b322ca8abf7450610e7e49e.tar.gz") {},
+  unstable ? import (fetchTarball "https://github.com/NixOS/nixpkgs/archive/nixos-unstable.tar.gz") {}
 }:
 
 pkgs.mkShell {
-  buildInputs = [
+  buildInputs = with pkgs; [
     nightingale-pkgs.docker-compose
-    pkgs.nodejs
-    pkgs.deno
-    pkgs.nodePackages.json
-    pkgs.nodePackages.triton
+    nodejs-16_x
+    unstable.deno
+    nodePackages.json
+    nodePackages.triton
   ];
 
   shellHook = ''