pkgs.formats.hcl1: host let variables to outside function scope

pkgs/pkgs-lib/formats.nix

@@ -1063,7 +1063,6 @@ optionalAttrs allowAliases aliases
     };
 
   hcl1 =
-    args:
     let
       # Helper function to recursively transform values for HCL1 canonicalization
       # Rule: If an attribute value is an attribute set, wrap it in a list
@@ -1079,6 +1078,7 @@ optionalAttrs allowAliases aliases
           value;
       jsonFormat = json { };
     in
+    args:
     jsonFormat
     // {
       generate = name: value: jsonFormat.generate name (mapAttrs (_: transform) value);