Merge pull request 'flake-parts: ensure flake.darwinConfigurations is mergeable' (#3244) from push-zurymrrrxwur into main

Reviewed-on: https://git.clan.lol/clan/clan-core/pulls/3244

flakeModules/clan.nix

@@ -2,7 +2,6 @@ clan-core:
 {
   config,
   lib,
-  flake-parts-lib,
   self,
   inputs,
   ...
@@ -44,11 +43,10 @@ in
     };
   };
 
-  options.flake =
-    flake-parts-lib.mkSubmoduleOptions {
-      clan = lib.mkOption { type = types.raw; };
-    }
-    // outputModule.topLevel.options;
+  options.flake = {
+    clan = lib.mkOption { type = types.raw; };
+  } // outputModule.topLevel.options;
+
   config = {
     flake = {
       clan = outputModule.clan;