1error:2 … while evaluating a branch condition3 at «string»:25:5:4 24| v:5 25| if !builtins.isAttrs v || isDrv v then6 | ^7 26| v89 … in the left operand of the OR (||) operator10 at «string»:25:28:11 24| v:12 25| if !builtins.isAttrs v || isDrv v then13 | ^14 26| v1516 … while evaluating definitions from `/nix/store/9iv83r72z5xwgylkwms1qip1ijnr6jqs-source/modules/transposition.nix':1718 … while evaluating definitions from `/nix/store/4pi761wvn6m4nlq882j5s2s2bgmx33vf-source/modules/checks/machines.nix, via option perSystem':1920 … while evaluating the option `system.build.toplevel':2122 … while evaluating definitions from `/nix/store/fv9q2q4cbd2adhnjvlvczjaqzyyw1fdk-source/nixos/modules/system/activation/top-level.nix':2324 (stack trace truncated; use '--show-trace' to show the full, detailed trace)2526 error: Refusing to evaluate package 'tmate-unstable-2022-08-07' in /nix/store/fv9q2q4cbd2adhnjvlvczjaqzyyw1fdk-source/pkgs/by-name/tm/tmate/package.nix:55 because it is marked as insecure2728 Known issues:29 - There are no upstream releases since 2019-11.30 - CVE-2018-193873132 You can install it anyway by allowing this package, using the33 following methods:3435 a) To temporarily allow all insecure packages, you can use an environment36 variable for a single invocation of the nix tools:3738 $ export NIXPKGS_ALLOW_INSECURE=13940 Note: When using `nix shell`, `nix build`, `nix develop`, etc with a flake,41 then pass `--impure` in order to allow use of environment variables.4243 b) for `nixos-rebuild` you can add ‘tmate-unstable-2022-08-07’ to44 `nixpkgs.config.permittedInsecurePackages` in the configuration.nix,45 like so:4647 {48 nixpkgs.config.permittedInsecurePackages = [49 "tmate-unstable-2022-08-07"50 ];51 }5253 c) For `nix-env`, `nix-build`, `nix-shell` or any other Nix command you can add54 ‘tmate-unstable-2022-08-07’ to `permittedInsecurePackages` in55 ~/.config/nixpkgs/config.nix, like so:5657 {58 permittedInsecurePackages = [59 "tmate-unstable-2022-08-07"60 ];61 }