error:
       … while evaluating the attribute 'nixosConfigurations.testmachine.config.system.build.toplevel'
         at /nix/store/lnd453b3xm5ri54szzdqqkz5iqfw9k37-minimal-clan-flake/flake.nix:19:29:
           18|       # all machines managed by Clan
           19|       inherit (clan.config) nixosConfigurations nixosModules clanInternals;
             |                             ^
           20|       clan = clan.config;

       … while evaluating the attribute 'value'
         at «https://releases.nixos.org/nixpkgs/nixpkgs-26.11pre1093421.f20cd90e28fe/nixexprs.tar.xz?narHash=sha256-MTJCMrhDFb%2BGRbLxBPTp8kB4dDlO%2BegmQ5qsJgYuaWw%3D»/lib/modules.nix:1181:7:
         1180|     // {
         1181|       value = addErrorContext "while evaluating the option `${showOption loc}':" (
             |       ^
         1182|         # Apply the 'apply' function to the merged value. This allows options to

       … while evaluating the option `nixosConfigurations':

       … while evaluating definitions from `/nix/store/bdgda00miwpfryv6z30vdgrw0szvviya-source/modules/clan/module.nix':

       … while evaluating the option `clanInternals.inventoryClass.machines':

       … while evaluating definitions from `/nix/store/bdgda00miwpfryv6z30vdgrw0szvviya-source/modules/clan/distributed-services.nix':

       … while evaluating the option `_allMachines':

       … while evaluating the option `inventory':

       (stack trace truncated; use '--show-trace' to show the full, detailed trace)

       error: gRPC QueryValidPaths on 'nix-store.geninf.io:50051' failed: error: substituter 'https://cache-local.geninf.io' is disabled