flake update and bring back overlays

flake.lock

@@ -325,11 +325,11 @@
         ]
       },
       "locked": {
-        "lastModified": 1736785676,
-        "narHash": "sha256-TY0jUwR3EW0fnS0X5wXMAVy6h4Z7Y6a3m+Yq++C9AyE=",
+        "lastModified": 1736883540,
+        "narHash": "sha256-dgPgoPUSg8cGAMqbhQRkww665sZtgzpWXxWjlyqhv94=",
         "owner": "nix-community",
         "repo": "home-manager",
-        "rev": "fc52a210b60f2f52c74eac41a8647c1573d2071d",
+        "rev": "0dfec9deb275854a56c97c356c40ef72e3a2e632",
         "type": "github"
       },
       "original": {
@@ -437,11 +437,11 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1736966948,
-        "narHash": "sha256-j9ysmoP7UJUEZdA1/Gjqa8zsx5gaq35PxRsaTBwgoWk=",
+        "lastModified": 1737007772,
+        "narHash": "sha256-YmN6LpUQwOaY7gYdcXtX5CtpT4W37taAjbAF6WOmY4Y=",
         "owner": "nixos",
         "repo": "nixpkgs",
-        "rev": "69b5cebd7cc197ee5885fa694465039c42a5c8dc",
+        "rev": "62e9d4ae7c343fdae23f7cf347d98204488c1401",
         "type": "github"
       },
       "original": {
@@ -669,11 +669,11 @@
         ]
       },
       "locked": {
-        "lastModified": 1736154270,
-        "narHash": "sha256-p2r8xhQZ3TYIEKBoiEhllKWQqWNJNoT9v64Vmg4q8Zw=",
+        "lastModified": 1737054102,
+        "narHash": "sha256-saLiCRQ5RtdTnznT/fja7GxcYRAzeY3k8S+IF/2s/2A=",
         "owner": "numtide",
         "repo": "treefmt-nix",
-        "rev": "13c913f5deb3a5c08bb810efd89dc8cb24dd968b",
+        "rev": "97871d416166803134ba64597a1006f3f670fbde",
         "type": "github"
       },
       "original": {

flake.nix

@@ -97,6 +97,7 @@
               pkgs = import nixpkgs {
                 config.allowUnfree = true;
                 system = "x86_64-linux";
+                overlays = import ./overlay;
               };
               lib = nixpkgs.lib;
             in