these 3 derivations will be built:
  /nix/store/zlp0k61xnbqpbaxp3bw90jj9pjyh42wb-treefmt.toml.drv
  /nix/store/9fwzd53fkaxjafdpv6hwix6di29x8acn-treefmt.drv
  /nix/store/vr6i4fk7gvgbiml9ylqywmbaqgvfrwi0-treefmt-check.drv
error: Cannot build '/nix/store/vr6i4fk7gvgbiml9ylqywmbaqgvfrwi0-treefmt-check.drv'.
       Reason: builder failed with exit code 1.
       Output paths:
         /nix/store/jcb2hz4m7ch574q9c90xqsdl2jg8wmvk-treefmt-check
       Last 25 log lines:
       >
       > CPY001 Missing copyright notice at top of file
       > --> tests/test_benchmark.py:1:1
       >
       > CPY001 Missing copyright notice at top of file
       > --> tests/test_cli.py:1:1
       >
       > CPY001 Missing copyright notice at top of file
       > --> tests/test_command.py:1:1
       >
       > CPY001 Missing copyright notice at top of file
       > --> tests/test_git_revision.py:1:1
       >
       > CPY001 Missing copyright notice at top of file
       > --> tests/test_parser.py:1:1
       >
       > CPY001 Missing copyright notice at top of file
       > --> tests/test_specs.py:1:1
       >
       > Found 17 errors.
       >
       > traversed 31 files
       > emitted 22 files for processing
       > formatted 5 files (0 changed) in 1.231s
       > Error: failed to finalise formatting: formatting failures detected
       For full logs, run:
         nix log /nix/store/vr6i4fk7gvgbiml9ylqywmbaqgvfrwi0-treefmt-check.drv