these 3 derivations will be built:
  /nix/store/84v26fh3krqgmp6g5zrpr2ndlxr1vg3b-treefmt.toml.drv
  /nix/store/125l40cz40lq03z3i2aipjl2vh2s4zb2-treefmt.drv
  /nix/store/5g66y3bkx3jz5idd68dixzz1sfw1mgip-treefmt-check.drv
error: Cannot build '/nix/store/5g66y3bkx3jz5idd68dixzz1sfw1mgip-treefmt-check.drv'.
       Reason: builder failed with exit code 1.
       Output paths:
         /nix/store/x73fc6w8l1dbc10g96y3h5f26hfmfzvi-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 1.635s
       > Error: failed to finalise formatting: formatting failures detected
       For full logs, run:
         nix log /nix/store/5g66y3bkx3jz5idd68dixzz1sfw1mgip-treefmt-check.drv