error:
       … while evaluating a branch condition
         at «string»:25:5:
           24|     v:
           25|     if !builtins.isAttrs v || isDrv v then
             |     ^
           26|       v

       … in the left operand of the OR (||) operator
         at «string»:25:28:
           24|     v:
           25|     if !builtins.isAttrs v || isDrv v then
             |                            ^
           26|       v

       … while evaluating the option `system.build.toplevel':

       … while evaluating definitions from `/nix/store/cm5m4hjjh37s6z82rwa0vhkbcga3m8bq-source/nixos/modules/system/activation/top-level.nix':

       … while evaluating the option `warnings':

       … while evaluating definitions from `/nix/store/cm5m4hjjh37s6z82rwa0vhkbcga3m8bq-source/nixos/modules/system/boot/systemd.nix':

       … while evaluating the option `systemd.services.stricknani-rust-staging.serviceConfig':

       … while evaluating definitions from `/nix/store/qc3pgvpg7hln2ahfhn00bv3pddp05k9z-source/services/stricknani-staging.nix':

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

       error: attribute 'stricknani-rust' missing
       at «github:pschmitt/nixos-config-private/0e9970861340d6c90e17b0cb5dd2f4c8496c5139?narHash=sha256-uBymlY16o2Z6bnG6tJUF3d8L0RlZc%2BG2xSHE7jhE2U4%3D»/services/stricknani-staging.nix:7:13:
            6| let
            7|   package = inputs.stricknani-rust.packages.${pkgs.stdenv.hostPlatform.system}.stricknani-rust;
             |             ^
            8|   user = "stricknani-rust-staging";