update opencode to more recent version with overlay

common/flake.nix

@@ -4,6 +4,8 @@
     home-manager.url = "github:rycee/home-manager/release-25.05";
     ragenix.url = "github:yaxitech/ragenix";
     nix-flatpak.url = "github:gmodena/nix-flatpak/?ref=latest";
+
+    nixpkgs_opencode.url = "github:nixos/nixpkgs/pull/419604/head";
   };
 
   outputs =
@@ -11,6 +13,7 @@
       home-manager,
       ragenix,
       nix-flatpak,
+      nixpkgs_opencode,
       ...
     }:
     {
@@ -23,6 +26,16 @@
           }:
           {
             imports = [
+              (
+                { ... }:
+                {
+                  nixpkgs.overlays = [
+                    (final: prev: {
+                      opencode = nixpkgs_opencode.legacyPackages.${prev.system}.opencode;
+                    })
+                  ];
+                }
+              )
               home-manager.nixosModules.home-manager
               ragenix.nixosModules.age
               nix-flatpak.nixosModules.nix-flatpak
@@ -36,6 +49,7 @@
               ./secrets
             ];
             config = {
+
               _module.args = {
                 inherit ragenix;
               };