diff --git a/extern/README.md b/extern/README.md
index 80f5c15b..0ca99bb1 100644
--- a/extern/README.md
+++ b/extern/README.md
@@ -7,4 +7,14 @@ used to extend the arguments passed to all NixOS modules, allowing for
 arbitrary values to be passed from flake inputs to the rest of your
 configuration.
 
+There is also an `hmModules` attribute set for pulling home-manager modules in
+from the outside world:
+```nix
+{
+  hmModules = {
+    inherit (someFlake.hmModules) anHmModule;
+  };
+}
+```
+
 [extern]: https://github.com/divnix/devos/tree/core/extern/default.nix
diff --git a/extern/default.nix b/extern/default.nix
index be5219cd..2f8677e9 100644
--- a/extern/default.nix
+++ b/extern/default.nix
@@ -1,6 +1,6 @@
 { inputs }: with inputs;
 let
-  hm-modules = { };
+  hmModules = { };
 in
 {
   modules = [