1error:2 … while evaluating a branch condition3 at «string»:23:10:4 22| if !keepName n then {}5 23| else if !builtins.isAttrs c || isDrv c then c6 | ^7 24| else if c ? _type || !(c.recurseForDerivations or true) then {}89 … in the left operand of the OR (||) operator10 at «string»:23:33:11 22| if !keepName n then {}12 23| else if !builtins.isAttrs c || isDrv c then c13 | ^14 24| else if c ? _type || !(c.recurseForDerivations or true) then {}1516 (stack trace truncated; use '--show-trace' to show the full, detailed trace)1718 error: Nixpkgs 26.11 has dropped support for x86_64-darwin.1920 The 26.05 stable branch still supports x86_64-darwin, and will21 receive security fixes until the end of 2026. If you use channels,22 you can switch to 26.05 as follows:2324 $ sudo nix-channel --add https://nixos.org/channels/nixpkgs-26.05-darwin nixpkgs25 $ sudo nix-channel --update2627 If this doesn’t work, you may need to run:2829 # Lack of sudo is deliberate:30 $ nix-channel --remove nixpkgs3132 If you use flakes, switch your flake input:3334 inputs.nixpkgs = {35 url = "github:NixOS/nixpkgs/nixpkgs-26.05-darwin";36 };3738 See the release notes for more information and alternatives:3940 https://nixos.org/manual/nixpkgs/unstable/release-notes#x86_64-darwin-26.11