Still not working

```
> nix develop
warning: Git tree '/home/dpc/lab/rustshop' is dirty
trace: /nix/store/pvc2z2jz7p6il74z7dx4p1q4fwia43xg-aws-bootstrap
error: attribute 'default' missing

       at /nix/store/yal0ywzgclz9xppspvlhb1gyhygmrcws-source/infra/flake.nix:19:51:

           18|       overlay = self: super: {
           19|         aws-bootstrap = builtins.trace ''${imp}'' imp.default;
             |                                                   ^
           20|       };
(use '--show-trace' to show detailed location information)
```

infra/flake.nix

@@ -14,8 +14,9 @@
   outputs = { self, nixpkgs, flake-utils, flake-compat}:
     flake-utils.lib.eachDefaultSystem (system:
     let
+      imp = (import ./utils/aws-bootstrap/default.nix);
       overlay = self: super: {
-        aws-bootstrap = ./utils/aws-bootstrap/default.nix;
+        aws-bootstrap = builtins.trace ''${imp}'' imp.default;
       };
       pkgs = import nixpkgs {
         inherit system;