error:
       … in the left operand of the update (//) operator
         at /var/lib/nixbot/worktrees/807-526069464019-19300c1e/flake.nix:40:12:
           39|         }
           40|         // packages
             |            ^
           41|         // devShells

       … while calling the 'listToAttrs' builtin
         at «github:NixOS/nixpkgs/e7a3ca8092b61ff85b6a45bf863ea2b2d6a661b3?narHash=sha256-UgCQzxeWI75XM8G%2BhPrPh%2BMKzEPjG3SpAj7dtqSbksA%3D»/lib/attrsets.nix:1055:23:
         1054|   */
         1055|   mapAttrs' = f: set: listToAttrs (mapAttrsToList f set);
             |                       ^
         1056|

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

       error: Nixpkgs 26.11 has dropped support for x86_64-darwin.

       The 26.05 stable branch still supports x86_64-darwin, and will
       receive security fixes until the end of 2026. If you use channels,
       you can switch to 26.05 as follows:

           $ sudo nix-channel --add https://nixos.org/channels/nixpkgs-26.05-darwin nixpkgs
           $ sudo nix-channel --update

       If this doesn’t work, you may need to run:

           # Lack of sudo is deliberate:
           $ nix-channel --remove nixpkgs

       If you use flakes, switch your flake input:

           inputs.nixpkgs = {
             url = "github:NixOS/nixpkgs/nixpkgs-26.05-darwin";
           };

       See the release notes for more information and alternatives:

         https://nixos.org/manual/nixpkgs/unstable/release-notes#x86_64-darwin-26.11