diff --git a/flake.nix b/flake.nix
index 99fcaaf..57fbbe2 100644
--- a/flake.nix
+++ b/flake.nix
@@ -22,7 +22,14 @@
         treefmt = inputs.treefmt-nix.lib.evalModule pkgs ./treefmt.nix;
       in
       {
-        lib.${system} = import ./lib { inherit pkgs; };
+        overlays =
+          let
+            lib = import ./overlay;
+          in
+          {
+            inherit lib;
+            default = lib;
+          };
 
         formatter.${system} = treefmt.config.build.wrapper;
         checks.${system}.formatting = treefmt.config.build.check inputs.self;
diff --git a/lib/default.nix b/overlay/default.nix
similarity index 54%
rename from lib/default.nix
rename to overlay/default.nix
index f613ba1..06b35c9 100644
--- a/lib/default.nix
+++ b/overlay/default.nix
@@ -1,6 +1,6 @@
-{ pkgs, ... }:
+final: prev:
 let
-  callPackage = pkgs.lib.callPackageWith { inherit pkgs; };
+  callPackage = prev.lib.callPackageWith { pkgs = prev; };
 in
 {
   fetchers = callPackage ./fetchers { };
diff --git a/lib/fetchers/default.nix b/overlay/fetchers/default.nix
similarity index 100%
rename from lib/fetchers/default.nix
rename to overlay/fetchers/default.nix
diff --git a/lib/fetchers/sshKnownHosts/default.nix b/overlay/fetchers/sshKnownHosts/default.nix
similarity index 100%
rename from lib/fetchers/sshKnownHosts/default.nix
rename to overlay/fetchers/sshKnownHosts/default.nix
diff --git a/lib/runtime/default.nix b/overlay/runtime/default.nix
similarity index 100%
rename from lib/runtime/default.nix
rename to overlay/runtime/default.nix
diff --git a/lib/runtime/merge/default.nix b/overlay/runtime/merge/default.nix
similarity index 100%
rename from lib/runtime/merge/default.nix
rename to overlay/runtime/merge/default.nix
diff --git a/lib/runtime/merge/keyValue/default.nix b/overlay/runtime/merge/keyValue/default.nix
similarity index 100%
rename from lib/runtime/merge/keyValue/default.nix
rename to overlay/runtime/merge/keyValue/default.nix
diff --git a/lib/runtime/merge/keyValue/key-value.sh b/overlay/runtime/merge/keyValue/key-value.sh
similarity index 100%
rename from lib/runtime/merge/keyValue/key-value.sh
rename to overlay/runtime/merge/keyValue/key-value.sh