standard template finalised

nixos/standard/overlays/default.nix

@@ -0,0 +1,21 @@
+{ inputs, ... }: {
+  # This one brings our custom packages from the 'pkgs' directory
+  additions = final: _prev: import ../pkgs { pkgs = final; };
+
+  # This one contains whatever you want to overlay
+  # You can change versions, add patches, set compilation flags, anything really.
+  # https://nixos.wiki/wiki/Overlays
+  modifications = final: prev:
+    {
+      # example = prev.example.overrideAttrs (oldAttrs: rec {
+      # ...
+      # });
+    };
+
+  stable-packages = final: _prev: {
+    stable = import inputs.nixpkgs-stable {
+      system = final.system;
+      config.allowUnfree = true;
+    };
+  };
+}