lib.packagesFromDirectoryRecursive: reject unknown arguments

see [discussion](https://github.com/NixOS/nixpkgs/pull/270537#discussion_r1862458435)

lib/filesystem.nix

@@ -311,7 +311,7 @@ in
       newScope? :: AttrSet -> scope,
       directory :: Path,
       recurseIntoDirectory? :: (args -> AttrSet) -> args -> AttrSet,
-      ...
+      recurseArgs? :: Any
     }) -> AttrSet
     ```
 
@@ -349,6 +349,9 @@ in
       ```
       :::
 
+    `recurseArgs`
+    : Optional argument, which can be hold data used by `recurseIntoDirectory`
+
     # Examples
     :::{.example}
     ## Basic use of `lib.packagesFromDirectoryRecursive`
@@ -438,28 +441,12 @@ in
     in
     {
       callPackage,
+      newScope ? throw "lib.packagesFromDirectoryRecursive: newScope wasn't passed in args",
       directory,
-      # recurseIntoDirectory can modify the function used when processing directory entries; see nixdoc above
-      recurseIntoDirectory ?
-        if args ? newScope then
-          # `processDir` is the same function as defined above
-          # `args` are the arguments passed to (this recursive call of) `packagesFromDirectoryRecursive`
-          processDir: { newScope, ... }@args:
-            # Create a new scope and mark it `recurseForDerivations`.
-            # This lets the packages refer to each other.
-            # See:
-            #  [lib.makeScope](https://nixos.org/manual/nixpkgs/unstable/#function-library-lib.customisation.makeScope) and
-            #  [lib.recurseIntoAttrs](https://nixos.org/manual/nixpkgs/unstable/#function-library-lib.customisation.makeScope)
-            recurseIntoAttrs (makeScope newScope (self:
-              # generate the attrset representing the directory, using the new scope's `callPackage` and `newScope`
-              processDir (args // {
-                inherit (self) callPackage newScope;
-              })
-            ))
-        else
-          # otherwise, no modification is necessary
-          id,
-      ...
+      # recurseIntoDirectory can modify the function used when processing directory entries
+      #  and recurseArgs can (optionally) hold data for its use ; see function documentation
+      recurseArgs ? throw "lib.packagesFromDirectoryRecursive: recurseArgs wasn't passed in args",
+      recurseIntoDirectory ? defaultRecurse,
     }@args:
     let
       defaultPath = append directory "package.nix";