diff --git a/default.nix b/default.nix
index a21f9b3..7ea52e4 100644
--- a/default.nix
+++ b/default.nix
@@ -17,4 +17,7 @@
 
   lib = import ./lib/env.nix;
   wrapperManagerLib = ./lib;
+  overlays.default = final: prev: {
+    wrapperManagerLib = import ./lib { pkgs = final; };
+  };
 }
diff --git a/docs/website/content/en/project-overview.adoc b/docs/website/content/en/project-overview.adoc
index c6afc34..c8712be 100644
--- a/docs/website/content/en/project-overview.adoc
+++ b/docs/website/content/en/project-overview.adoc
@@ -127,6 +127,9 @@ in
 wrapperManagerLib.env.build { }
 ----
 
+* `overlays` is a set of nixpkgs overlays to be applied by the user.
+So far, there's only one overlay called `default` containing the wrapper-manager library set.
+
 
 
 [#getting-started]