diff --git a/NixOS.md b/NixOS.md
index 560678c..536dcd3 100644
--- a/NixOS.md
+++ b/NixOS.md
@@ -706,6 +706,13 @@ colmena eval -E '{ nodes, lib, pkgs, ... }: pkgs.linuxPackages_latest.kernel'
 #=> "/nix/store/n0csng9aw5nhpll1m5rbvvxkkj2j63px-linux-6.10.7"
 ```
 
+Lists and strings will be printed. To inspect an attribute set, add `pkgs.lib.attrNames`.
+
+```shell
+colmena eval -E '{ nodes, lib, pkgs, ... }: pkgs.lib.attrNames nodes.yodaTux.pkgs.rust-bin.stable.latest.default'
+#=> [...,"type","userHook","version"]
+```
+
 ## Evaluate expressions
 
 * https://discourse.nixos.org/t/eval-nix-expression-from-the-command-line/8993/6