error:
       … in the right operand of the update (//) operator
         at «github:NixOS/nixpkgs/770b9bbb84018993c8f009d437fff6c2e3077037?narHash=sha256-jS1cnt9j6OkoDoHlURQEDYtJcUHOSwuYGexSvx9aDd4%3D»/lib/attrsets.nix:1628:52:
         1627|           # The invariant is satisfied because each half will have at least 1 element
         1628|           binaryMerge start ((start + end) / 2) // binaryMerge ((start + end) / 2) end;
             |                                                    ^
         1629|     in

       … in the right operand of the update (//) operator
         at «github:NixOS/nixpkgs/770b9bbb84018993c8f009d437fff6c2e3077037?narHash=sha256-jS1cnt9j6OkoDoHlURQEDYtJcUHOSwuYGexSvx9aDd4%3D»/lib/attrsets.nix:1628:52:
         1627|           # The invariant is satisfied because each half will have at least 1 element
         1628|           binaryMerge start ((start + end) / 2) // binaryMerge ((start + end) / 2) end;
             |                                                    ^
         1629|     in

       … in the right operand of the update (//) operator
         at «github:NixOS/nixpkgs/770b9bbb84018993c8f009d437fff6c2e3077037?narHash=sha256-jS1cnt9j6OkoDoHlURQEDYtJcUHOSwuYGexSvx9aDd4%3D»/lib/attrsets.nix:1628:52:
         1627|           # The invariant is satisfied because each half will have at least 1 element
         1628|           binaryMerge start ((start + end) / 2) // binaryMerge ((start + end) / 2) end;
             |                                                    ^
         1629|     in

       … while calling the 'elemAt' builtin
         at «github:NixOS/nixpkgs/770b9bbb84018993c8f009d437fff6c2e3077037?narHash=sha256-jS1cnt9j6OkoDoHlURQEDYtJcUHOSwuYGexSvx9aDd4%3D»/lib/attrsets.nix:1623:11:
         1622|           # which case we just return it directly
         1623|           elemAt list start
             |           ^
         1624|         else

       (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