1error:2 … in the left operand of the update (//) operator3 at /var/lib/nixbot/worktrees/266-0006e6324f85-751960c4/nix/checks.nix:58:4:4 57| }5 58| // lib.optionalAttrs pkgs.stdenv.isLinux (6 | ^7 59| lib.mapAttrs' (89 … while evaluating a branch condition10 at «git+https://github.com/NixOS/nixpkgs?ref=nixpkgs-unstable&rev=b471514bed69eff5255c8e63c1f80e5fe56c616f&shallow=1»/lib/attrsets.nix:1482:29:11 1481| */12 1482| optionalAttrs = cond: as: if cond then as else { };13 | ^14 1483|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