ultra super mega over overengineering

xlib/default.nix

@@ -11,42 +11,30 @@ let
 
   build = import ./builder { inherit self inputs; };
   machines = (import "${self}/machines");
-in
-
-{
-  nixosConfigurations = build machines;
-  formatter.${system} = pkgs.nixfmt-rfc-style;
-  packages.${system} = import ./packages.nix {
+  mk = import ./other {
     inherit
+      forAllSystems
       inputs
       pkgs
       lib
       ;
   };
-  devShells.${system} =
-    with pkgs;
-    let
-      mk =
-        p:
-        mkShell {
-          shellHook = ''exec fish'';
-          packages = p;
-        };
-    in
-    {
-      nixDev = mk [
-        nixfmt-rfc-style
-        nix-init
-        cachix
-      ];
-      rust = mk [
-        rustfmt
-        rustc
-        cargo
-      ];
-      python = mk [
-        python3
-        pipx
-      ];
-    };
+
+  forAllSystems = i: lib.genAttrs sys i;
+  sys = [
+    "x86_64-linux"
+    "aarch64-linux"
+    "x86_64-darwin"
+    "aarch64-darwin"
+  ];
+in
+
+{
+  nixosConfigurations = build machines;
 }
+
+// (lib.genAttrs [
+  "formatter"
+  "packages"
+  "devShells"
+] (n: mk.${n}))

xlib/other/default.nix

@@ -0,0 +1,28 @@
+{
+  forAllSystems,
+  inputs,
+  pkgs,
+  lib,
+}:
+
+{
+  "packages" = forAllSystems (
+    system:
+    (import ./packages.nix {
+      inherit
+        inputs
+        pkgs
+        lib
+        ;
+    })
+  );
+  "devShells" = forAllSystems (
+    system:
+    (import ./shells.nix {
+      inherit
+        pkgs
+        ;
+    })
+  );
+  "formatter" = forAllSystems (system: pkgs.nixfmt-rfc-style);
+}

xlib/other/packages.nix

@@ -23,7 +23,7 @@ let
     );
 
   legacyPackages = scope.packages scope;
-  scope = scopeFromDirectory ../pkgs;
+  scope = scopeFromDirectory ../../pkgs;
 in
 
 flattenPkgs "/" [ ] legacyPackages

xlib/other/shells.nix

@@ -0,0 +1,30 @@
+{
+  pkgs,
+}:
+
+with pkgs;
+let
+  mk =
+    p:
+    mkShell {
+      shellHook = ''exec fish'';
+      packages = p;
+    };
+in
+
+{
+  nixDev = mk [
+    nixfmt-rfc-style
+    nix-init
+    cachix
+  ];
+  rust = mk [
+    rustfmt
+    rustc
+    cargo
+  ];
+  python = mk [
+    python3
+    pipx
+  ];
+}