diff --git a/lib/eval-config.nix b/lib/eval-config.nix
index d5947e8d870..4a1853a8d32 100644
--- a/lib/eval-config.nix
+++ b/lib/eval-config.nix
@@ -16,17 +16,18 @@ rec {
     ./check-config.nix
   ] ++ (import ../modules/module-list.nix);
 
+  extraArgs = {
+    inherit pkgs;
+    modulesPath = ../modules;
+  };
+
   config_ =
-    pkgs.lib.definitionsOf configComponents {
-      inherit pkgs;
-    };
+    pkgs.lib.definitionsOf configComponents extraArgs;
 
   # "fixableDeclarationsOf" is used instead of "declarationsOf" because some
   # option default values may depends on the definition of other options.
   optionDeclarations =
-    pkgs.lib.fixableDeclarationsOf configComponents {
-      inherit pkgs;
-    } config_;
+    pkgs.lib.fixableDeclarationsOf configComponents extraArgs config_;
 
   # Optionally check wether all config values have corresponding
   # option declarations.