flake.nix: embed pkgs instantiation in forAllSystems

flake.nix

@@ -19,29 +19,23 @@
         "aarch64-linux"
         "aarch64-darwin"
       ];
-      forAllSystems = f: lib.genAttrs systems f;
+      forAllSystems = f: nixpkgs.lib.genAttrs systems (system: f system nixpkgs.legacyPackages.${system});
     in
     {
-      packages = forAllSystems (
-        system:
-        let
-          pkgs = nixpkgs.legacyPackages.${system};
-        in
-        rec {
-          zoneFiles = pkgs.callPackage ./zoneConfig.nix {
-            inherit dns;
-          };
+      packages = forAllSystems (system: pkgs: rec {
+        zoneFiles = pkgs.callPackage ./zoneConfig.nix {
+          inherit dns;
+        };
 
-          nsdConfig = pkgs.callPackage ./nsd.conf.nix { inherit pkgs; };
+        nsdConfig = pkgs.callPackage ./nsd.conf.nix { inherit pkgs; };
 
-          default = pkgs.runCommand "pvv-dns" { } ''
-            mkdir -p $out/zones
-            mkdir -p $out/etc/nsd
+        default = pkgs.runCommand "pvv-dns" { } ''
+          mkdir -p $out/zones
+          mkdir -p $out/etc/nsd
 
-            cp -r ${zoneFiles}/* $out/zones/
-            cp -r ${nsdConfig} $out/etc/nsd/nsd.conf
-          '';
-        }
-      );
+          cp -r ${zoneFiles}/* $out/zones/
+          cp -r ${nsdConfig} $out/etc/nsd/nsd.conf
+        '';
+      });
     };
 }