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 definitions from `/nix/store/s0fpxz3rvfip9bc50wfmwpigxiyl6nkg-source/modules/transposition.nix':

       … while evaluating definitions from `/nix/store/s3gz2z3v8mnds5g7skwcmivi0vrh9wfc-source/checks/flake-module.nix, via option perSystem':

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

       … while evaluating definitions from `/nix/store/psk67z2p5aigw7hb8866hwir1rkdn8vl-source/nixos/modules/system/activation/top-level.nix':

       … while evaluating the option `warnings':

       … while evaluating definitions from `/nix/store/psk67z2p5aigw7hb8866hwir1rkdn8vl-source/nixos/modules/system/boot/systemd.nix':

       … while evaluating the option `systemd.services.zerotierone.serviceConfig':

       … while evaluating definitions from `/nix/store/psk67z2p5aigw7hb8866hwir1rkdn8vl-source/nixos/modules/system/boot/systemd.nix':

       … while evaluating the option `systemd.services.zerotierone.preStart':

       … while evaluating definitions from `/nix/store/psk67z2p5aigw7hb8866hwir1rkdn8vl-source/nixos/modules/services/networking/zerotierone.nix':

       … while evaluating the option `services.zerotierone.joinNetworks':

       … while evaluating definitions from `/nix/store/7b7lgxwmz8k65xwhjhs9sxxqhdrszs1v-source/clanServices/zerotier/default.nix, via option flake.clan._services.allServices.clan-core-zerotier.perMachine, via option nixosModule':

       … while evaluating the option `clan.core.vars.generators.zerotier-network-zerotier-claninfra.files.network-id.value':

       … while evaluating the option `clan.core.vars.generators.zerotier-network-zerotier-claninfra.files.network-id.path':

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

       error: File 'network-id' at 'shared/zerotier-network-zerotier-claninfra' does not exist. Try running 'clan vars generate' first.