forgejo-actions-run.: use runner pkg from unstable to make it work again

flake.nix

@@ -6,6 +6,7 @@
     # https://nixos.org/manual/nixos/stable/#sec-upgrading
     # https://github.com/NixOS/nixpkgs
     nixpkgs.url = "github:nixos/nixpkgs/nixos-25.05";
+    nixpkgs-unstable.url = "github:nixos/nixpkgs/nixpkgs-unstable";
 
     # Add nixos-generators as an input.
     # See here: https://github.com/nix-community/nixos-generators#using-in-a-flake
@@ -27,12 +28,13 @@
     };
   };
 
-  outputs = { self, nixpkgs, nixos-generators, sops-nix, authorizedKeysRepo, ... }:
+  outputs = { self, nixpkgs, nixos-generators, nixpkgs-unstable, sops-nix, authorizedKeysRepo, ... }:
     let
       specialArgs = {
         inherit authorizedKeysRepo;
       };
       system = "x86_64-linux";
+      pkgs-unstable = nixpkgs-unstable.legacyPackages."${system}";
     in
     {
       nixosModules = {
@@ -135,7 +137,7 @@
         };
 
         forgejo-actions-runner = nixpkgs.lib.nixosSystem {
-          inherit system specialArgs;
+          inherit system;
           modules = [
             self.nixosModules.common
             self.nixosModules.proxmox-vm
@@ -143,6 +145,10 @@
             self.nixosModules.prometheus-exporter
             ./config/hosts/forgejo-actions-runner
           ];
+          specialArgs = {
+            inherit authorizedKeysRepo;
+            inherit pkgs-unstable;
+          };
         };
 
         ptouch-print-server = nixpkgs.lib.nixosSystem {