these 3 derivations will be built:
  /nix/store/p3kkf43i165qbrmj4dqf9ald7863sqz3-treefmt.toml.drv
  /nix/store/hb245x8dm2pf0s6fgrmpw10c03h8yinl-treefmt.drv
  /nix/store/7jmhxfi7wv30pjkk1yssg3grafncap40-treefmt-check.drv
error: Cannot build '/nix/store/7jmhxfi7wv30pjkk1yssg3grafncap40-treefmt-check.drv'.
       Reason: builder failed with exit code 1.
       Output paths:
         /nix/store/9vfhh3b0b1kbzfj7fqir6l5dr1vr9614-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 1.269s
       > Error: failed to finalise formatting: formatting failures detected
       For full logs, run:
         nix log /nix/store/7jmhxfi7wv30pjkk1yssg3grafncap40-treefmt-check.drv