1error:2 … while evaluating the attribute 'drvPath'3 at «github:NixOS/nixpkgs/170ad806965c0046fb97f0d823deba0a61834aac?narHash=sha256-41upEYWDix%2BZruxPn80QHtHe304w3RHWY5RvIpw/kPg%3D»/lib/customisation.nix:415:11:4 414| // {5 415| drvPath =6 | ^7 416| assert condition;89 … while calling the 'derivationStrict' builtin10 at «nix-internal»/derivation-internal.nix:37:12:11 36|12 37| strict = derivationStrict drvAttrs;13 | ^14 38|1516 … while evaluating the option `driverConfigurationFile':1718 … while evaluating the option `driverConfiguration.vms.server.start_script':1920 … while evaluating definitions from `/nix/store/qcn8cgndcms1l0py9sff5i9n73m9z2j9-source/nixos/lib/testing/driver-configuration.nix':2122 … while evaluating the option `nodes.server.system.build.toplevel':2324 … while evaluating definitions from `/nix/store/qcn8cgndcms1l0py9sff5i9n73m9z2j9-source/nixos/modules/system/activation/top-level.nix':2526 … while evaluating the option `nodes.server.warnings':2728 … while evaluating definitions from `/nix/store/qcn8cgndcms1l0py9sff5i9n73m9z2j9-source/nixos/modules/system/boot/systemd.nix':2930 … while evaluating the option `nodes.server.systemd.services.vault.serviceConfig':3132 … while evaluating definitions from `/nix/store/qcn8cgndcms1l0py9sff5i9n73m9z2j9-source/nixos/modules/services/security/vault.nix':3334 (stack trace truncated; use '--show-trace' to show the full, detailed trace)3536 error: Refusing to evaluate package 'vault-2.0.3' in /nix/store/qcn8cgndcms1l0py9sff5i9n73m9z2j9-source/pkgs/by-name/va/vault/package.nix:70 because it has an unfree license (‘bsl11’)37 a) To temporarily allow unfree packages, you can use an environment variable38 for a single invocation of the nix tools.3940 $ export NIXPKGS_ALLOW_UNFREE=14142 Note: When using `nix shell`, `nix build`, `nix develop`, etc with a flake,43 then pass `--impure` in order to allow use of environment variables.4445 b) For `nixos-rebuild` you can set46 { nixpkgs.config.allowUnfree = true; }47 in configuration.nix to override this.4849 Alternatively you can configure a predicate to allow specific packages:50 { nixpkgs.config.allowUnfreePredicate = pkg: builtins.elem (lib.getName pkg) [51 "vault"52 ];53 }5455 c) For `nix-env`, `nix-build`, `nix-shell` or any other Nix command you can add56 { allowUnfree = true; }57 to ~/.config/nixpkgs/config.nix.