this derivation will be built:
  /nix/store/k5h32sbh1x16928i48i5l9ayvryaxqrk-nix-eval-jobs-functional-tests.drv
error: Cannot build '/nix/store/k5h32sbh1x16928i48i5l9ayvryaxqrk-nix-eval-jobs-functional-tests.drv'.
       Reason: builder failed with exit code 1.
       Output paths:
         /nix/store/aqbpmbnlb4amnn15ykf8mj60jzj6cwkg-nix-eval-jobs-functional-tests
       Last 25 log lines:
       >                     # Windows accumulates the output in a single blocking
       >                     # read() call run on child threads, with the timeout
       >                     # being done in a join() on those threads.  communicate()
       >                     # _after_ kill() is required to collect that and add it
       >                     # to the exception.
       >                     exc.stdout, exc.stderr = process.communicate()
       >                 else:
       >                     # POSIX _communicate already populated the output so
       >                     # far into the TimeoutExpired exception.
       >                     process.wait()
       >                 raise
       >             except:  # Including KeyboardInterrupt, communicate handled that.
       >                 process.kill()
       >                 # We don't call process.wait() as .__exit__ does that for us.
       >                 raise
       >             retcode = process.poll()
       >             if check and retcode:
       > >               raise CalledProcessError(retcode, process.args,
       >                                          output=stdout, stderr=stderr)
       > E               subprocess.CalledProcessError: Command '['/nix/store/v7fgcpx3ram406y75pi5fqg854g6y4va-nix-eval-jobs-2.35.3/bin/nix-eval-jobs', '--gc-roots-dir', '/build/pytest-of-nixbld/pytest-0/test_workers_do_not_race_flake0/gc', '--workers', '8', '--extra-experimental-features', 'nix-command flakes', '--flake', 'git+file:///build/pytest-of-nixbld/pytest-0/test_workers_do_not_race_flake0/flake#hydraJobs']' returned non-zero exit status 1.
       >
       > /nix/store/d64q19q1xjdwfhqx6czvrjgrhq0n3lcc-python3-3.14.7/lib/python3.14/subprocess.py:578: CalledProcessError
       > =========================== short test summary info ============================
       > FAILED tests-functional/test_eval.py::test_workers_do_not_race_flake_fetch - ...
       > ========================= 1 failed, 32 passed in 7.86s =========================
       For full logs, run:
         nix log /nix/store/k5h32sbh1x16928i48i5l9ayvryaxqrk-nix-eval-jobs-functional-tests.drv