these 4 derivations will be built:
  /nix/store/6zyb94pal8xm15znpbxrp869ba566nnd-buildbot-4.3.0.drv
  /nix/store/hnyw6f90sqaw6clgzbdblns7vvgzx2am-treefmt.toml.drv
  /nix/store/wil6vxqr11lwhhapcfzr7li9s8q72gqq-treefmt.drv
  /nix/store/r7g3bpddjml22x238j500whgrj368f2r-treefmt-check.drv
these 11 paths will be fetched (25.1 MiB download, 118.9 MiB unpacked):
  /nix/store/f1qznkxk5x30kx0v3lcd1q0c1rmcsd5z-python3.14-buildbot_worker-4.3.0
  /nix/store/6wj1qywcyka57anhsl0pm1xnmwfdpay8-python3.14-flit-core-3.12.0
  /nix/store/12w7l7lscmb7v5f4sylys12vgjlla01i-python3.14-librt-0.13.0
  /nix/store/n490d9yqbc4mv5gq79gr04wvbk9mqik0-python3.14-mypy-2.1.0
  /nix/store/a2yab6hn0sj9ayjkn3jvy32py7v2828g-python3.14-mypy-extensions-1.1.0
  /nix/store/mic8bcwbf9428yqbcb4px8kmd6f9bhwx-python3.14-setuptools-trial-0.6.0
  /nix/store/df73xkm1kcpkkns5hvcj573asdjmyiwg-python3.14-treq-25.5.0
  /nix/store/8xm683bm5a77ky9vih7wrsaklv8zfb8m-python3.14-twisted-26.4.0
  /nix/store/jsyvjpwm9wr2gq6m0fjr555d74z2rhvn-python3.14-txrequests-0.9.6
  /nix/store/3x0fl30g4i8hkmjvbjjkb11nl6mamms9-python3.14-types-requests-2.32.4.20260107
  /nix/store/vkpzcc5pswrf38ivjw8i6plgym0q6n6c-python3.14-types-urllib3-1.26.25.14
error: Cannot build '/nix/store/r7g3bpddjml22x238j500whgrj368f2r-treefmt-check.drv'.
       Reason: builder failed with exit code 1.
       Output paths:
         /nix/store/wlmw2r14dkccznd2ln0337rhk8909yvp-treefmt-check
       Last 25 log lines:
       > CPY001 Missing copyright notice at top of file
       > --> buildbot_nix/buildbot_nix/scheduled.py:1:1
       >
       > CPY001 Missing copyright notice at top of file
       > --> buildbot_nix/buildbot_nix/tests/__init__.py:1:1
       >
       > CPY001 Missing copyright notice at top of file
       > --> buildbot_nix/buildbot_nix/tests/test_nix_eval_job.py:1:1
       >
       > CPY001 Missing copyright notice at top of file
       > --> buildbot_nix/buildbot_nix/tests/test_pydantic_models.py:1:1
       >
       > CPY001 Missing copyright notice at top of file
       > --> buildbot_nix/buildbot_nix/util.py:1:1
       >
       > CPY001 Missing copyright notice at top of file
       > --> buildbot_nix/buildbot_nix/worker.py:1:1
       >
       > Found 60 errors (10 fixed, 50 remaining).
       > No fixes available (1 hidden fix can be enabled with the `--unsafe-fixes` option).
       >
       > traversed 98 files
       > emitted 90 files for processing
       > formatted 42 files (6 changed) in 10.579s
       > Error: failed to finalise formatting: formatting failures detected
       For full logs, run:
         nix log /nix/store/r7g3bpddjml22x238j500whgrj368f2r-treefmt-check.drv