these 2 derivations will be built:
  /nix/store/i51imn7z7xdcbhx3v7gzyhp0qsf10y3q-nixos-test-driver-nix-grpc-farm.drv
  /nix/store/y7llvfib0wr89112i888yks43mzzm1kp-vm-test-run-nix-grpc-farm.drv
error: Cannot build '/nix/store/i51imn7z7xdcbhx3v7gzyhp0qsf10y3q-nixos-test-driver-nix-grpc-farm.drv'.
       Reason: builder failed with exit code 1.
       Output paths:
         /nix/store/ga3jbdi3fh7diajmhqxg261hdzxvi6zc-nixos-test-driver-nix-grpc-farm
       Last 10 log lines:
       > tribuchet: building on jamie
       > Running type check (enable/disable: config.skipTypeCheck)
       > See https://nixos.org/manual/nixos/stable/#test-opt-skipTypeCheck
       > error[unresolved-reference]: Name `leader` used when not defined
       >    --> testScriptWithTypes:240:25
       >     |
       > 240 |     wants = lambda: int(leader().succeed("journalctl -u nix-grpc-daemon -o cat | grep -c 'event=want ' || true"))
       >     |                         ^^^^^^
       >
       > Found 1 diagnostic
       For full logs, run:
         nix log /nix/store/i51imn7z7xdcbhx3v7gzyhp0qsf10y3q-nixos-test-driver-nix-grpc-farm.drv
error: Cannot build '/nix/store/y7llvfib0wr89112i888yks43mzzm1kp-vm-test-run-nix-grpc-farm.drv'.
       Reason: 1 dependency failed.
       Output paths:
         /nix/store/nfdma2pyba37mvnmvnm41nc5s3ajkkga-vm-test-run-nix-grpc-farm