1error:2 … in the right operand of the update (//) operator3 at /var/lib/nixbot/worktrees/255-e477c66d5485-14818bc8/flake.nix:75:34:4 74| in5 75| packages // devShells // vmTests);6 | ^7 76| };89 … while evaluating a branch condition10 at «github:nixos/nixpkgs/3d2613bc58a1f5b7805467a63a825e1d7bc9b7a9?narHash=sha256-4Ztw87nz9iSaxfh/3mqXs4B/YXjx8%2BPnxBRdUi1akYk%3D»/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