these 3 derivations will be built:
  /nix/store/fgzl1lgwgrbkpr9p4y4hk46rcfjvii8f-treefmt.toml.drv
  /nix/store/8ppm82fk2ll1ik22lrq5rjfpz5j2bwkz-treefmt.drv
  /nix/store/ggp9fb51k1nkladvmqsdyl3gkk2gjwdh-treefmt-check.drv
this path will be fetched (1.0 MiB download, 2.7 MiB unpacked):
  /nix/store/nxwdrqr0ga06ijadvpmbsyxz9vwwa2lc-nixfmt-rs-0.4.1
error: Cannot build '/nix/store/ggp9fb51k1nkladvmqsdyl3gkk2gjwdh-treefmt-check.drv'.
       Reason: builder failed with exit code 1.
       Output paths:
         /nix/store/75823c25bbj3icgl3z8gjfrrdz86v5k5-treefmt-check
       Last 25 log lines:
       > CPY001 Missing copyright notice at top of file
       > --> tests/test_cli.py:1:1
       >
       > CPY001 Missing copyright notice at top of file
       > --> tests/test_github_integration.py:1:1
       >
       > CPY001 Missing copyright notice at top of file
       > --> tests/test_log_format.py:1:1
       >
       > CPY001 Missing copyright notice at top of file
       > --> tests/test_retry.py:1:1
       >
       > CPY001 Missing copyright notice at top of file
       > --> tests/test_term.py:1:1
       >
       > CPY001 Missing copyright notice at top of file
       > --> tests/test_tty_renderer.py:1:1
       >
       > Found 29 errors.
       > No fixes available (1 hidden fix can be enabled with the `--unsafe-fixes` option).
       >
       > traversed 47 files
       > emitted 37 files for processing
       > formatted 10 files (0 changed) in 91ms
       > Error: failed to finalise formatting: formatting failures detected
       For full logs, run:
         nix log /nix/store/ggp9fb51k1nkladvmqsdyl3gkk2gjwdh-treefmt-check.drv