this derivation will be built:
  /nix/store/gmza3na6yhgzh5hwycv98hg01cr0wl58-vm-test-run-nix-grpc-farm.drv
error: Cannot build '/nix/store/gmza3na6yhgzh5hwycv98hg01cr0wl58-vm-test-run-nix-grpc-farm.drv'.
       Reason: builder failed with exit code 1.
       Output paths:
         /nix/store/z975qx1zb7lmj8hxfzrjl03sisd2v6y2-vm-test-run-nix-grpc-farm
       Last 25 log lines:
       >   File "/nix/store/r2r0lyypbamx7mzpb4853lcn9a540acv-nixos-test-driver-1.1/bin/.nixos-test-driver-wrapped", line 9, in <module>
       >     sys.exit(main())
       >              ~~~~^^
       >   File "/nix/store/r2r0lyypbamx7mzpb4853lcn9a540acv-nixos-test-driver-1.1/lib/python3.14/site-packages/test_driver/__init__.py", line 194, in main
       >     driver.run_tests()
       >     ~~~~~~~~~~~~~~~~^^
       >   File "/nix/store/r2r0lyypbamx7mzpb4853lcn9a540acv-nixos-test-driver-1.1/lib/python3.14/site-packages/test_driver/driver.py", line 437, in run_tests
       >     self.test_script()
       >     ~~~~~~~~~~~~~~~~^^
       >   File "/nix/store/r2r0lyypbamx7mzpb4853lcn9a540acv-nixos-test-driver-1.1/lib/python3.14/site-packages/test_driver/driver.py", line 395, in test_script
       >     exec(self.tests, symbols, None)
       >     ~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^
       >   File "<string>", line 96, in <module>
       > AssertionError: lb:50051: no healthy upstream, retrying
       > lb:50051: no healthy upstream, retrying
       > lb:50051: no healthy upstream, retrying
       > lb:50051: no healthy upstream, retrying
       > lb:50051: no healthy upstream, retrying
       > lb:50051: no healthy upstream, retrying
       > lb:50051: no healthy upstream, retrying
       > lb:50051: no healthy upstream, retrying
       > lb:50051: no healthy upstream, retrying
       > error: gRPC QueryMissing on 'lb:50051' failed: no healthy upstream
       >        hint: Set NIX_GRPC_DEBUG=1 for a handshake trace.
       >
       For full logs, run:
         nix log /nix/store/gmza3na6yhgzh5hwycv98hg01cr0wl58-vm-test-run-nix-grpc-farm.drv