error:
       … while calling the 'derivationStrict' builtin
         at «nix-internal»/derivation-internal.nix:37:12:
           36|
           37|   strict = derivationStrict drvAttrs;
             |            ^
           38|

       … while evaluating derivation 'nix-grpc-farm-helm-check'
         whose name attribute is located at «github:NixOS/nixpkgs/8ce4ef6cb6f871616146b9fe26d2a5ae594e94fe?narHash=sha256-xB8mKMOx1IA9vTDNLmJZ6n4wCMq/cuWBBOzGCRnqxrU%3D»/pkgs/stdenv/generic/make-derivation.nix:651:11

       … while evaluating attribute 'buildCommand' of derivation 'nix-grpc-farm-helm-check'
         at «github:NixOS/nixpkgs/8ce4ef6cb6f871616146b9fe26d2a5ae594e94fe?narHash=sha256-xB8mKMOx1IA9vTDNLmJZ6n4wCMq/cuWBBOzGCRnqxrU%3D»/pkgs/build-support/trivial-builders/default.nix:84:17:
           83|         enableParallelBuilding = true;
           84|         inherit buildCommand name;
             |                 ^
           85|         passAsFile = defaultPassAsFile ++ (derivationArgs.passAsFile or [ ]);

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

       error: The option `services.nix-grpc-farm-lb.features' does not exist. Definition values:
       - In `<unknown-file>':
           {
             x86_64-linux = {
               kvm = [
                 "HOST-x86:50051"
               ];
           ...

       Did you mean `services.nix-grpc-farm-lb.enable', `services.nix-grpc-farm-lb.listen' or `services.nix-grpc-farm-lb.tls'?