diff --git a/readme.md b/readme.md
index 3ea55454..367ceef3 100644
--- a/readme.md
+++ b/readme.md
@@ -52,11 +52,15 @@ on the other hand the `packages` output contains only my own packages.
 
 in addition, my packages are placed into both the global scope and a `sane` scope.
 so use the scoped path when you want to be explicit.
-
 ```
 nix build sane.linux-megous
 ```
 
+to build a package precisely how a specific host would see it (in case the host's config customizes it):
+```
+nix build '.#host-pkgs.moby-cross.xdg-utils'
+```
+
 ## using this repo in your own config
 
 this should be a pretty "standard" flake. just reference it, and import either