diff --git a/lib/eval-source.nix b/lib/eval-source.nix
index de5f0b43c..468fc92d1 100644
--- a/lib/eval-source.nix
+++ b/lib/eval-source.nix
@@ -3,13 +3,11 @@ let
   eval = _file: source: evalModules {
     modules = singleton {
       inherit _file;
+      imports = map (source: { inherit source; }) (toList source);
       options.source = mkOption {
         type = types.attrsOf types.source;
         default = {};
       };
-      config = {
-        inherit source;
-      };
     };
   };
 in