diff --git a/modules/misc/context.nix b/modules/misc/context.nix
index 170372ac..353d6a09 100644
--- a/modules/misc/context.nix
+++ b/modules/misc/context.nix
@@ -1,6 +1,16 @@
 { lib, ... }:
 {
   options = {
+    isTopLevel = lib.mkOption {
+      type = lib.types.bool;
+      default = false;
+      description = ''
+        Whether modules are being evaluated at the "top-level".
+        Should be false when evaluating nested submodules.
+      '';
+      internal = true;
+      visible = false;
+    };
     isDocs = lib.mkOption {
       type = lib.types.bool;
       default = false;
diff --git a/modules/top-level/default.nix b/modules/top-level/default.nix
index 581a1e6e..1d427020 100644
--- a/modules/top-level/default.nix
+++ b/modules/top-level/default.nix
@@ -10,4 +10,8 @@
     ./output.nix
     ./test.nix
   ];
+
+  config = {
+    isTopLevel = true;
+  };
 }