diff --git a/pkgs/lib/modules.nix b/pkgs/lib/modules.nix
index 286178a0fa7..74603e9c579 100644
--- a/pkgs/lib/modules.nix
+++ b/pkgs/lib/modules.nix
@@ -197,9 +197,9 @@ rec {
       recurseInto = name:
         moduleMerge (addName name) (modulesOf name);
 
-      recurseForOption = name: modules:
+      recurseForOption = name: modules: args:
         moduleMerge name (
-          map unifyModuleSyntax modules
+          moduleClosure modules args
         );
 
       errorSource = modules:
diff --git a/pkgs/lib/options.nix b/pkgs/lib/options.nix
index 3a8cc0006ef..d31a501cac9 100644
--- a/pkgs/lib/options.nix
+++ b/pkgs/lib/options.nix
@@ -82,16 +82,11 @@ rec {
       handleOptionSets = opt:
         if opt ? type && opt.type.hasOptions then
           let
-            
-            optionConfig = vals: args:
-              map (f: lib.applyIfFunction f args)
-                (opt.options ++ toList vals);
-
             # Evaluate sub-modules.
             subModuleMerge = path: vals:
               lib.fix (args:
                 let
-                  result = recurseInto path (optionConfig vals args);
+                  result = recurseInto path (opt.options ++ toList vals) args;
                   name = lib.removePrefix (opt.name + ".") path;
                   extraArgs = opt.extraArgs or {};
                   individualExtraArgs = opt.individualExtraArgs or {};