this derivation will be built:
  /nix/store/w21wn0p9hllh8mc6rhl87lls833yn4da-container-test-ubuntu-26-04-example.drv
building '/nix/store/w21wn0p9hllh8mc6rhl87lls833yn4da-container-test-ubuntu-26-04-example.drv' on 'grpc://farm.numtide.com:50051?client-cert=/run/secrets/vars/per-machine/bld1/nix-farm-ci/crt&client-key=/run/secrets/vars/per-machine/bld1/nix-farm-ci/key&connect-timeout=21&system=aarch64-linux'
building '/nix/store/w21wn0p9hllh8mc6rhl87lls833yn4da-container-test-ubuntu-26-04-example.drv' on farm.numtide.com:50051
container-test-ubuntu-26-04-example> elastic-arm-efff5407: building w21wn0p9hllh8mc6rhl87lls833yn4da-container-test-ubuntu-26-04-example.drv
container-test-ubuntu-26-04-example> Running type check
container-test-ubuntu-26-04-example> Success: no issues found in 1 source file
container-test-ubuntu-26-04-example> Linting test script
container-test-ubuntu-26-04-example> Error: Unknown device type.
container-test-ubuntu-26-04-example> Traceback (most recent call last):
container-test-ubuntu-26-04-example>   File "/nix/store/lhq8ch7f5hdjf6z4g0mamr3sz05q823a-container-test-driver-0.0.1/bin/.container-test-driver-wrapped", line 9, in <module>
container-test-ubuntu-26-04-example>     sys.exit(main())
container-test-ubuntu-26-04-example>              ~~~~^^
container-test-ubuntu-26-04-example>   File "/nix/store/lhq8ch7f5hdjf6z4g0mamr3sz05q823a-container-test-driver-0.0.1/lib/python3.14/site-packages/test_driver/__init__.py", line 110, in main
container-test-ubuntu-26-04-example>     with Driver(
container-test-ubuntu-26-04-example>          ~~~~~~^
container-test-ubuntu-26-04-example>         containers=[container],
container-test-ubuntu-26-04-example>         ^^^^^^^^^^^^^^^^^^^^^^^
container-test-ubuntu-26-04-example>     ...<3 lines>...
container-test-ubuntu-26-04-example>         interactive=args.interactive,
container-test-ubuntu-26-04-example>         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
container-test-ubuntu-26-04-example>     ) as driver:
container-test-ubuntu-26-04-example>     ^
container-test-ubuntu-26-04-example>   File "/nix/store/lhq8ch7f5hdjf6z4g0mamr3sz05q823a-container-test-driver-0.0.1/lib/python3.14/site-packages/test_driver/driver.py", line 63, in __init__
container-test-ubuntu-26-04-example>     self._create_bridge()
container-test-ubuntu-26-04-example>     ~~~~~~~~~~~~~~~~~~~^^
container-test-ubuntu-26-04-example>   File "/nix/store/lhq8ch7f5hdjf6z4g0mamr3sz05q823a-container-test-driver-0.0.1/lib/python3.14/site-packages/test_driver/driver.py", line 103, in _create_bridge
container-test-ubuntu-26-04-example>     subprocess.run(
container-test-ubuntu-26-04-example>     ~~~~~~~~~~~~~~^
container-test-ubuntu-26-04-example>         ["ip", "link", "add", self.bridge_name, "type", "bridge"],
container-test-ubuntu-26-04-example>         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
container-test-ubuntu-26-04-example>         check=True,
container-test-ubuntu-26-04-example>         ^^^^^^^^^^^
container-test-ubuntu-26-04-example>         text=True,
container-test-ubuntu-26-04-example>         ^^^^^^^^^^
container-test-ubuntu-26-04-example>     )
container-test-ubuntu-26-04-example>     ^
container-test-ubuntu-26-04-example>   File "/nix/store/3fl7bdkdxk2k4nssy1d1161isbzn6bsr-python3-3.14.7/lib/python3.14/subprocess.py", line 578, in run
container-test-ubuntu-26-04-example>     raise CalledProcessError(retcode, process.args,
container-test-ubuntu-26-04-example>                              output=stdout, stderr=stderr)
container-test-ubuntu-26-04-example> subprocess.CalledProcessError: Command '['ip', 'link', 'add', 'ctd-89b952cc', 'type', 'bridge']' returned non-zero exit status 2.
error: build of '/nix/store/w21wn0p9hllh8mc6rhl87lls833yn4da-container-test-ubuntu-26-04-example.drv' on 'grpc://farm.numtide.com:50051?client-cert=/run/secrets/vars/per-machine/bld1/nix-farm-ci/crt&client-key=/run/secrets/vars/per-machine/bld1/nix-farm-ci/key&connect-timeout=21&system=aarch64-linux' failed: Cannot build '/nix/store/w21wn0p9hllh8mc6rhl87lls833yn4da-container-test-ubuntu-26-04-example.drv'.
       Reason: builder failed with exit code 1.
       Output paths:
         /nix/store/fpv0nrxis2kk725hzqmhrwi9znp576ih-container-test-ubuntu-26-04-example
       Last 25 log lines:
       >         containers=[container],
       >         ^^^^^^^^^^^^^^^^^^^^^^^
       >     ...<3 lines>...
       >         interactive=args.interactive,
       >         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
       >     ) as driver:
       >     ^
       >   File "/nix/store/lhq8ch7f5hdjf6z4g0mamr3sz05q823a-container-test-driver-0.0.1/lib/python3.14/site-packages/test_driver/driver.py", line 63, in __init__
       >     self._create_bridge()
       >     ~~~~~~~~~~~~~~~~~~~^^
       >   File "/nix/store/lhq8ch7f5hdjf6z4g0mamr3sz05q823a-container-test-driver-0.0.1/lib/python3.14/site-packages/test_driver/driver.py", line 103, in _create_bridge
       >     subprocess.run(
       >     ~~~~~~~~~~~~~~^
       >         ["ip", "link", "add", self.bridge_name, "type", "bridge"],
       >         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
       >         check=True,
       >         ^^^^^^^^^^^
       >         text=True,
       >         ^^^^^^^^^^
       >     )
       >     ^
       >   File "/nix/store/3fl7bdkdxk2k4nssy1d1161isbzn6bsr-python3-3.14.7/lib/python3.14/subprocess.py", line 578, in run
       >     raise CalledProcessError(retcode, process.args,
       >                              output=stdout, stderr=stderr)
       > subprocess.CalledProcessError: Command '['ip', 'link', 'add', 'ctd-89b952cc', 'type', 'bridge']' returned non-zero exit status 2.
       For full logs, run:
         nix log /nix/store/w21wn0p9hllh8mc6rhl87lls833yn4da-container-test-ubuntu-26-04-example.drv
error: Cannot build '/nix/store/w21wn0p9hllh8mc6rhl87lls833yn4da-container-test-ubuntu-26-04-example.drv'.
       Reason: builder failed with exit code 1.
       Output paths:
         /nix/store/fpv0nrxis2kk725hzqmhrwi9znp576ih-container-test-ubuntu-26-04-example