super flake upgrade

flake.nix

@@ -1,46 +1,53 @@
 {
-  description = "devshell-dawn";
+  description = "devshell-dorne";
 
   inputs = {
     nixpkgs.url = "github:NixOS/nixpkgs/nixos-25.05";
-    nixpkgs-unstable.url = "github:NixOS/nixpkgs/nixos-unstable";
   };
 
-  outputs = {
+  outputs = inputs @ {
     self,
     nixpkgs,
-    nixpkgs-unstable,
-    ...
   }: let
-    system = "x86_64-linux";
+    defaultSystems = ["aarch64-darwin" "aarch64-linux" "i686-linux" "x86_64-darwin" "x86_64-linux"];
 
-    pkgs = import nixpkgs {
-      inherit system;
-    };
-    pkgs-unstable = import nixpkgs-unstable {
-      inherit system;
-    };
+    # forAllSystems = f: nixpkgs.lib.genAttrs defaultSystems (system: f system);
+    forAllSystems = f:
+      nixpkgs.lib.mapAttrs (nixpkgs.lib.genAttrs defaultSystems (system:
+        f system (import nixpkgs {
+          inherit system;
+          overlays = [self.overlay];
+        })));
   in {
-    devShells."${system}".default = pkgs.mkShell {
-      packages = with pkgs; [
-        gnumake
-        bear
-        gcc
-      ];
-
-      shell = "${pkgs.bash}/bin/bash";
-    };
-
-    packages."${system}" = rec {
-      default = dawn;
-      dawn = pkgs.haskellPackages.developPackage {
+    overlays.default = final: prev: {
+      dorne = final.haskellPackages.developPackage {
         root = ./.;
         modifier = drv:
-          pkgs.haskell.lib.addBuildTools drv (with pkgs.haskellPackages; [
+          final.haskell.lib.addBuildTools drv (with final.haskellPackages; [
             cabal-install
             ghcid
           ]);
       };
     };
+
+    devShells = forAllSystems (
+      system: pkgs: {
+        default = pkgs.mkShell {
+          packages = with pkgs; [
+            gnumake
+            bear
+            gcc
+          ];
+
+          shell = "${pkgs.bash}/bin/bash";
+        };
+      }
+    );
+
+    checks = self.packages;
+    packages = forAllSystems (system: pkgs: rec {
+      default = dorne;
+      dorne = pkgs.dorne;
+    });
   };
 }