flake(overlays): add lucem to overlay

flake.nix

@@ -170,7 +170,9 @@
                 atool-wrapped = packages.atool;
               };
             in [
+              # TODO delete this, transfer all packages to new-packages overlay
               packagesOverlay
+              self.overlays.new-packages
               # various temporary fixes that automatically revert
               self.overlays.mitigations
 

pkgs/module.nix

@@ -1,11 +1,32 @@
-{ config, lib, ... }:
 {
-  imports = [ ./legacy-module.nix ];
+  config,
+  lib,
+  ...
+}: {
+  imports = [./legacy-module.nix];
   config = {
-    perSystem = { system, inputs', self', pkgs, ...}: {
+    perSystem = {
+      system,
+      inputs',
+      self',
+      pkgs,
+      ...
+    }: {
       packages = {
-        lucem = pkgs.callPackage ./lucem { };
+        lucem = pkgs.callPackage ./lucem {};
       };
     };
+
+    flake = {
+      overlays.new-packages = final: prev: let
+        inherit (final) callPackage;
+        currentSystem = config.perSystem "${prev.system}";
+        flakePackages = currentSystem.packages;
+        addPackages = packages: lib.genAttrs packages (package: callPackage flakePackages.${package}.override {});
+      in
+        addPackages [
+          "lucem"
+        ];
+    };
   };
 }