fix: dont pin matterbridge

flake.lock

@@ -109,11 +109,11 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1645010845,
-        "narHash": "sha256-hO9X4PvxkSLMQnGGB7tOrKPwufhLMiNQMNXNwzLqneo=",
+        "lastModified": 1645379616,
+        "narHash": "sha256-eLzR3MRS9hcNqSWZxP6BP7xiBjgC3/pB5n2Q0lLFe/g=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "2128d0aa28edef51fd8fef38b132ffc0155595df",
+        "rev": "40ef692a55b188b1f5ae3967f3fc7808838c3f1d",
         "type": "github"
       },
       "original": {
@@ -125,11 +125,11 @@
     },
     "nixpkgs-unstable": {
       "locked": {
-        "lastModified": 1645316389,
-        "narHash": "sha256-GgPYZrzsdJDvVOrt5XgVU4ggATwpeRwLZpEadhVYNEA=",
+        "lastModified": 1645640456,
+        "narHash": "sha256-DZ5GUFRafSXAPxsPGauDHMF5SwXWKrPPCGB4uNHIDvo=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "4ab80e60db232f3cf187009b26c3361409c2eafe",
+        "rev": "856fbb7e322fd9c7e951d42a792957b84f0b0bb6",
         "type": "github"
       },
       "original": {

systems/makanek/matterbridge.nix

@@ -1,16 +1,5 @@
 { pkgs, lib, ... }:
 {
-  nixpkgs.overlays = [
-    (self: super: {
-      matterbridge = (import (super.fetchFromGitHub {
-        owner = "NixOS";
-        repo = "nixpkgs";
-        rev = "e45d91ee65db293a172ec506759d1248e40c35f5";
-        sha256 = "03cjs5xcx09lw0djyrx2kfakw7gkg4iqmy9w25azai62im39l30k";
-      }) {}).matterbridge;
-    })
-  ];
-
   services.matterbridge = {
     enable = true;
     configPath =