diff --git a/flake.lock b/flake.lock
index 14ed6d3..b8eec20 100644
--- a/flake.lock
+++ b/flake.lock
@@ -774,6 +774,21 @@
         "url": "https://github.com/NixOS/nixpkgs/archive/a5d394176e64ab29c852d03346c1fc9b0b7d33eb.tar.gz"
       }
     },
+    "nixpkgs-master": {
+      "locked": {
+        "lastModified": 1725495500,
+        "narHash": "sha256-d88LG7QXgPlaRUPEZKN2JpKRHoDUkxoeCodCq51vo9E=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "6f16e67b49214c52b1551b2c2bccb0ded54a59d0",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
     "nixpkgs-regression": {
       "locked": {
         "lastModified": 1643052045,
@@ -988,6 +1003,7 @@
         "nixos-generators": "nixos-generators",
         "nixos-hardware": "nixos-hardware",
         "nixpkgs": "nixpkgs_3",
+        "nixpkgs-master": "nixpkgs-master",
         "proxmox-nixos": "proxmox-nixos",
         "sops-nix": "sops-nix",
         "treefmt": "treefmt"
diff --git a/flake.nix b/flake.nix
index e9b2688..a2097c1 100644
--- a/flake.nix
+++ b/flake.nix
@@ -20,6 +20,8 @@
   inputs = {
     nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
 
+    nixpkgs-master.url = "github:NixOS/nixpkgs";
+
     flake-parts.url = "github:hercules-ci/flake-parts";
 
     nixos-anywhere.url = "github:numtide/nixos-anywhere";
diff --git a/overlays/default.nix b/overlays/default.nix
index a149bb3..ab9fbb3 100644
--- a/overlays/default.nix
+++ b/overlays/default.nix
@@ -1,5 +1,16 @@
 { inputs, ... }: {
   imports = [ inputs.flake-parts.flakeModules.easyOverlay ];
 
-  perSystem = _: { overlayAttrs = { }; };
+  perSystem = { system, ... }:
+    let
+      nixpkgs-master = import inputs.nixpkgs-master {
+        inherit system;
+
+        config.allowUnfree = true;
+      };
+    in {
+      overlayAttrs = {
+        inherit (nixpkgs-master) prowlarr radarr sabnzbd sonarr;
+      };
+    };
 }