this derivation will be built:
  /nix/store/nkhl1ryqzdpk0g169g4j2hi7k7q23j95-vm-test-run-nix-grpc-farm-k3s.drv
error: Cannot build '/nix/store/nkhl1ryqzdpk0g169g4j2hi7k7q23j95-vm-test-run-nix-grpc-farm-k3s.drv'.
       Reason: builder failed with exit code 1.
       Output paths:
         /nix/store/4mpqmwqdr9bir2bxnd73lflp1j7k2cx9-vm-test-run-nix-grpc-farm-k3s
       Last 25 log lines:
       > machine # dz2b0n3fvfcqcy0pvij1zk1n6zbn5l5y-slow-s1.drv: machine/nix-grpc-farm-worker-x86-64-linux-54fbbb575d-r4n5k: not scheduled here: dz2b0n3fvfcqcy0pvij1zk1n6zbn5l5y-slow-s1.drv, asking the scheduler again
       > machine # building '/nix/store/dz2b0n3fvfcqcy0pvij1zk1n6zbn5l5y-slow-s1.drv' on 127.0.0.1:30051...
       > machine # slow-s1> machine/nix-grpc-farm-worker-x86-64-linux-54fbbb575d-jf97x: building dz2b0n3fvfcqcy0pvij1zk1n6zbn5l5y-slow-s1.drv
       > machine # dz2b0n3fvfcqcy0pvij1zk1n6zbn5l5y-slow-s1.drv: worker shutting down: error: unexpected end-of-file, asking the scheduler again
       > machine: output:
       > !!! Test "killing a worker mid-build bounces the build to the other" failed with error: "command `curl -sf http://192.168.1.1:5751/y3acvj08nghpm5af4xjpd88dm1r7xhig.narinfo > /dev/null || (cat /tmp/slow.log >&2; false)` failed (exit code 1)"
       > machine # dz2b0n3fvfcqcy0pvij1zk1n6zbn5l5y-slow-s1.drv: worker draining, asking the scheduler again
       > machine # dz2b0n3fvfcqcy0pvij1zk1n6zbn5l5y-slow-s1.drv: worker draining, asking the scheduler again
       > machine # dz2b0n3fvfcqcy0pvij1zk1n6zbn5l5y-slow-s1.drv: worker draining, asking the scheduler again
       > machine # dz2b0n3fvfcqcy0pvij1zk1n6zbn5l5y-slow-s1.drv: machine/nix-grpc-farm-worker-x86-64-linux-54fbbb575d-r4n5k: not scheduled here: dz2b0n3fvfcqcy0pvij1zk1n6zbn5l5y-slow-s1.drv, asking the scheduler again
       > !!! Traceback (most recent call last):
       > !!!   File "<string>", line 77, in <module>
       > !!!     machine.succeed(f"curl -sf http://192.168.1.1:5751/{narinfo} > /dev/null || (cat /tmp/slow.log >&2; false)")
       > !!! 
       > !!! RequestedAssertionFailed: command `curl -sf http://192.168.1.1:5751/y3acvj08nghpm5af4xjpd88dm1r7xhig.narinfo > /dev/null || (cat /tmp/slow.log >&2; false)` failed (exit code 1)
       > cleanup
       > kill QemuMachine (pid 45)
       > machine # dz2b0n3fvfcqcy0pvij1zk1n6zbn5l5y-slow-s1.drv: machine/nix-grpc-farm-worker-x86-64-linux-54fbbb575d-r4n5k: not scheduled here: dz2b0n3fvfcqcy0pvij1zk1n6zbn5l5y-slow-s1.drv, asking the scheduler again
       > machine # dz2b0n3fvfcqcy0pvij1zk1n6zbn5l5y-slow-s1.drv: machine/nix-grpc-farm-worker-x86-64-linux-54fbbb575d-r4n5k: not scheduleqemu-system-x86_64: terminating on signal 15 from pid 39 (/nix/store/b5bpi6zfajzzrwwpgba2q6li3nnya4bs-python3-3.14.7/bin/python3.14)
       > machine # d
       > (finished: cleanup, in 1.34 seconds)
       > additionally exposed symbols:
       >     machine,
       >     vlan1,
       >     start_all, test_script, machines, machines_qemu, machines_nspawn, vlans, driver, log, os, create_machine, subtest, run_tests, join_all, retry, serial_stdout_off, serial_stdout_on, polling_condition, BaseMachine, QemuMachine, NspawnMachine, t, debug, dump_machine_ssh
       For full logs, run:
         nix log /nix/store/nkhl1ryqzdpk0g169g4j2hi7k7q23j95-vm-test-run-nix-grpc-farm-k3s.drv