error:
       … while evaluating a branch condition
         at «string»:25:5:
           24|     v:
           25|     if !builtins.isAttrs v || isDrv v then
             |     ^
           26|       v

       … in the left operand of the OR (||) operator
         at «string»:25:28:
           24|     v:
           25|     if !builtins.isAttrs v || isDrv v then
             |                            ^
           26|       v

       (stack trace truncated; use '--show-trace' to show the full, detailed trace)

       error: attribute 'busybox' missing
       at «github:NixOS/nixpkgs/37b97ae3dd714de9a17923d004a2c5b5543dfa6d?narHash=sha256-wdYD41UwNwPhTdMaG0AIe7fE1bAdyHe6bB4HLUqUvck%3D»/pkgs/stdenv/linux/bootstrap-tools/default.nix:6:13:
            5|
            6|   builder = bootstrapFiles.busybox;
             |             ^
            7|