1error: Nixpkgs 26.11 has dropped support for x86_64-darwin.23The 26.05 stable branch still supports x86_64-darwin, and will4receive security fixes until the end of 2026. If you use channels,5you can switch to 26.05 as follows:67 $ sudo nix-channel --add https://nixos.org/channels/nixpkgs-26.05-darwin nixpkgs8 $ sudo nix-channel --update910If this doesn’t work, you may need to run:1112 # Lack of sudo is deliberate:13 $ nix-channel --remove nixpkgs1415If you use flakes, switch your flake input:1617 inputs.nixpkgs = {18 url = "github:NixOS/nixpkgs/nixpkgs-26.05-darwin";19 };2021See the release notes for more information and alternatives:2223 https://nixos.org/manual/nixpkgs/unstable/release-notes#x86_64-darwin-26.112425 at /nix/store/rhsxvv1380jmchb5p3a43d24mhlmp2ry-source/lib/trivial.nix:1003:3726 … while calling the 'throw' builtin at /nix/store/rhsxvv1380jmchb5p3a43d24mhlmp2ry-source/lib/trivial.nix:1003:3727 … while calling anonymous lambda at /nix/store/rhsxvv1380jmchb5p3a43d24mhlmp2ry-source/lib/trivial.nix:1003:1928 … from call site at /nix/store/rhsxvv1380jmchb5p3a43d24mhlmp2ry-source/pkgs/top-level/default.nix:113:929 … while calling anonymous lambda at /nix/store/rhsxvv1380jmchb5p3a43d24mhlmp2ry-source/lib/trivial.nix:982:4030 … from call site at /nix/store/rhsxvv1380jmchb5p3a43d24mhlmp2ry-source/pkgs/top-level/default.nix:108:631 … while calling anonymous lambda at /nix/store/rhsxvv1380jmchb5p3a43d24mhlmp2ry-source/pkgs/top-level/default.nix:21:132 … from call site at /nix/store/rhsxvv1380jmchb5p3a43d24mhlmp2ry-source/pkgs/top-level/impure.nix:55:133 … while calling anonymous lambda at /nix/store/rhsxvv1380jmchb5p3a43d24mhlmp2ry-source/pkgs/top-level/impure.nix:12:134 … from call site at /nix/store/rhsxvv1380jmchb5p3a43d24mhlmp2ry-source/flake.nix:234:1235 … while calling anonymous lambda at /nix/store/rhsxvv1380jmchb5p3a43d24mhlmp2ry-source/flake.nix:233:1136 … from call site at /nix/store/rhsxvv1380jmchb5p3a43d24mhlmp2ry-source/lib/attrsets.nix:1343:1737 … while evaluating the attribute 'legacyPackages.x86_64-darwin' at /nix/store/rhsxvv1380jmchb5p3a43d24mhlmp2ry-source/lib/attrsets.nix:1343:938 … while calling anonymous lambda at /nix/store/6xr58mfvs42ixw6428x3vm9l5h88l2z7-source/modules/transposition.nix:115:2039 … while evaluating the attribute 'value' at /nix/store/f0r1xpd2wkbzcvn0bf1w1xvjkzpsyf1s-source/lib/types.nix:969:1140 … while evaluating definitions from `/nix/store/6xr58mfvs42ixw6428x3vm9l5h88l2z7-source/modules/transposition.nix':41 … while calling the '__addErrorContext' builtin at /nix/store/f0r1xpd2wkbzcvn0bf1w1xvjkzpsyf1s-source/lib/modules.nix:1233:1242 … while evaluating the attribute 'optionalValue.value' at /nix/store/f0r1xpd2wkbzcvn0bf1w1xvjkzpsyf1s-source/lib/modules.nix:1342:543 … while calling anonymous lambda at /nix/store/f0r1xpd2wkbzcvn0bf1w1xvjkzpsyf1s-source/lib/types.nix:1029:1844 … while evaluating the attribute 'nixpkgs.legacyPackages'45 … while calling the '__seq' builtin at /nix/store/6xr58mfvs42ixw6428x3vm9l5h88l2z7-source/modules/nixpkgs.nix:19:1146 … while evaluating the attribute 'value.content' at /nix/store/f0r1xpd2wkbzcvn0bf1w1xvjkzpsyf1s-source/lib/modules.nix:1600:2247 … while evaluating the attribute 'value._type' at /nix/store/f0r1xpd2wkbzcvn0bf1w1xvjkzpsyf1s-source/lib/modules.nix:1458:6748 … while calling anonymous lambda at /nix/store/f0r1xpd2wkbzcvn0bf1w1xvjkzpsyf1s-source/lib/modules.nix:1264:2149 … from call site at /nix/store/f0r1xpd2wkbzcvn0bf1w1xvjkzpsyf1s-source/lib/modules.nix:1264:1650 … while calling the '__any' builtin at /nix/store/f0r1xpd2wkbzcvn0bf1w1xvjkzpsyf1s-source/lib/modules.nix:1264:1651 … while evaluating the attribute 'values' at /nix/store/f0r1xpd2wkbzcvn0bf1w1xvjkzpsyf1s-source/lib/modules.nix:1270:1152 … while evaluating the attribute 'optionalValue.value' at /nix/store/f0r1xpd2wkbzcvn0bf1w1xvjkzpsyf1s-source/lib/modules.nix:1342:553 … while calling anonymous lambda at /nix/store/f0r1xpd2wkbzcvn0bf1w1xvjkzpsyf1s-source/lib/types.nix:1029:1854 … while evaluating the attribute '_module.args.pkgs'55 … noting that argument `pkgs` is not externally provided, so querying `_module.args` instead, requiring `config`56 … while calling the '__addErrorContext' builtin at /nix/store/f0r1xpd2wkbzcvn0bf1w1xvjkzpsyf1s-source/lib/modules.nix:744:2857 … while evaluating the module argument `pkgs' in ":anon-10:anon-1":58 … while calling the '__addErrorContext' builtin at /nix/store/f0r1xpd2wkbzcvn0bf1w1xvjkzpsyf1s-source/lib/modules.nix:743:959 … while calling anonymous lambda at /nix/store/f0r1xpd2wkbzcvn0bf1w1xvjkzpsyf1s-source/lib/modules.nix:742:1560 … while evaluating the attribute 'default' at /nix/store/gxyl7pv3y8fxkj19b45aw8imsivh9r6z-source/flake-module.nix:40:1961 … while evaluating the attribute 'value.content' at /nix/store/f0r1xpd2wkbzcvn0bf1w1xvjkzpsyf1s-source/lib/modules.nix:1600:2262 … while evaluating the attribute 'value._type' at /nix/store/f0r1xpd2wkbzcvn0bf1w1xvjkzpsyf1s-source/lib/modules.nix:1458:6763 … while calling anonymous lambda at /nix/store/f0r1xpd2wkbzcvn0bf1w1xvjkzpsyf1s-source/lib/modules.nix:1264:2164 … from call site at /nix/store/f0r1xpd2wkbzcvn0bf1w1xvjkzpsyf1s-source/lib/modules.nix:1264:1665 … while calling the '__any' builtin at /nix/store/f0r1xpd2wkbzcvn0bf1w1xvjkzpsyf1s-source/lib/modules.nix:1264:1666 … while evaluating the attribute 'values' at /nix/store/f0r1xpd2wkbzcvn0bf1w1xvjkzpsyf1s-source/lib/modules.nix:1270:1167 … while evaluating the attribute 'mergedValue' at /nix/store/f0r1xpd2wkbzcvn0bf1w1xvjkzpsyf1s-source/lib/modules.nix:1276:568 … while evaluating the option `perSystem.x86_64-darwin.treefmt.pkgs':69 … while calling the '__addErrorContext' builtin at /nix/store/f0r1xpd2wkbzcvn0bf1w1xvjkzpsyf1s-source/lib/modules.nix:1181:1570 … while evaluating the attribute 'value' at /nix/store/f0r1xpd2wkbzcvn0bf1w1xvjkzpsyf1s-source/lib/modules.nix:1181:771 … while calling anonymous lambda at /nix/store/f0r1xpd2wkbzcvn0bf1w1xvjkzpsyf1s-source/lib/modules.nix:283:3872 … while evaluating the attribute 'pkgs'73 … while evaluating the attribute 'value' at /nix/store/f0r1xpd2wkbzcvn0bf1w1xvjkzpsyf1s-source/lib/types.nix:969:1174 … while evaluating definitions from `/nix/store/gxyl7pv3y8fxkj19b45aw8imsivh9r6z-source/flake-module.nix':75 … while calling the '__addErrorContext' builtin at /nix/store/f0r1xpd2wkbzcvn0bf1w1xvjkzpsyf1s-source/lib/modules.nix:1233:1276 … while evaluating the attribute 'optionalValue.value' at /nix/store/f0r1xpd2wkbzcvn0bf1w1xvjkzpsyf1s-source/lib/modules.nix:1342:577 … while calling anonymous lambda at /nix/store/f0r1xpd2wkbzcvn0bf1w1xvjkzpsyf1s-source/lib/types.nix:1029:1878 … while evaluating the attribute '_module.args.pkgs'79 … noting that argument `pkgs` is not externally provided, so querying `_module.args` instead, requiring `config`80 … while calling the '__addErrorContext' builtin at /nix/store/f0r1xpd2wkbzcvn0bf1w1xvjkzpsyf1s-source/lib/modules.nix:744:2881 … while evaluating the module argument `pkgs' in "/nix/store/gxyl7pv3y8fxkj19b45aw8imsivh9r6z-source/module-options.nix":82 … while calling the '__addErrorContext' builtin at /nix/store/f0r1xpd2wkbzcvn0bf1w1xvjkzpsyf1s-source/lib/modules.nix:743:983 … while calling anonymous lambda at /nix/store/f0r1xpd2wkbzcvn0bf1w1xvjkzpsyf1s-source/lib/modules.nix:742:1584 … while calling 'default' at /nix/store/gxyl7pv3y8fxkj19b45aw8imsivh9r6z-source/module-options.nix:342:1185 … from call site at /nix/store/f0r1xpd2wkbzcvn0bf1w1xvjkzpsyf1s-source/lib/types.nix:1312:2386 … while evaluating the attribute 'value' at /nix/store/f0r1xpd2wkbzcvn0bf1w1xvjkzpsyf1s-source/lib/types.nix:1312:1587 … while evaluating definitions from `/nix/store/gxyl7pv3y8fxkj19b45aw8imsivh9r6z-source/module-options.nix':88 … while calling the '__addErrorContext' builtin at /nix/store/f0r1xpd2wkbzcvn0bf1w1xvjkzpsyf1s-source/lib/modules.nix:1233:1289 … while evaluating the attribute 'mergedValue' at /nix/store/f0r1xpd2wkbzcvn0bf1w1xvjkzpsyf1s-source/lib/modules.nix:1276:590 … while calling anonymous lambda at /nix/store/f0r1xpd2wkbzcvn0bf1w1xvjkzpsyf1s-source/lib/types.nix:1308:1491 … from call site at /nix/store/gxyl7pv3y8fxkj19b45aw8imsivh9r6z-source/flake-module.nix:74:2392 … while evaluating the attribute 'value' at /nix/store/f0r1xpd2wkbzcvn0bf1w1xvjkzpsyf1s-source/lib/types.nix:969:1193 … while evaluating definitions from `/nix/store/gxyl7pv3y8fxkj19b45aw8imsivh9r6z-source/flake-module.nix':94 … while calling the '__addErrorContext' builtin at /nix/store/f0r1xpd2wkbzcvn0bf1w1xvjkzpsyf1s-source/lib/modules.nix:1233:1295 … while evaluating the attribute 'optionalValue.value' at /nix/store/f0r1xpd2wkbzcvn0bf1w1xvjkzpsyf1s-source/lib/modules.nix:1342:596 … while calling anonymous lambda at /nix/store/f0r1xpd2wkbzcvn0bf1w1xvjkzpsyf1s-source/lib/types.nix:1029:1897 … while evaluating the attribute 'value' at /nix/store/f0r1xpd2wkbzcvn0bf1w1xvjkzpsyf1s-source/lib/types.nix:969:1198 … while evaluating definitions from `/nix/store/6xr58mfvs42ixw6428x3vm9l5h88l2z7-source/modules/transposition.nix':99 … while calling the '__addErrorContext' builtin at /nix/store/f0r1xpd2wkbzcvn0bf1w1xvjkzpsyf1s-source/lib/modules.nix:1233:12100 … while evaluating the attribute 'optionalValue.value' at /nix/store/f0r1xpd2wkbzcvn0bf1w1xvjkzpsyf1s-source/lib/modules.nix:1342:5101 … while calling anonymous lambda at /nix/store/f0r1xpd2wkbzcvn0bf1w1xvjkzpsyf1s-source/lib/types.nix:1029:18102 … while calling the '__isAttrs' builtin at «string»:25:9103 … while calling 'prune' at «string»:24:5