this derivation will be built:
  /nix/store/49vbx2kmnvq640cjk14p254qp90fwv0n-treefmt-check.drv
building '/nix/store/49vbx2kmnvq640cjk14p254qp90fwv0n-treefmt-check.drv'
treefmt-check> treefmt v2.5.0ERRO formatter | ruff-check[1]: failed to apply with options '[check --fix]': exit status 1
treefmt-check> 
treefmt-check> ARG002 Unused method argument: `when_spec`
treefmt-check>   --> nixbot/nixbot/tests/test_control.py:89:65
treefmt-check>    |
treefmt-check> 88 |     async def run_scheduled_now(
treefmt-check> 89 |         self, project_id: int, schedule_name: str, effect: str, when_spec: str
treefmt-check>    |                                                                 ^^^^^^^^^
treefmt-check> 90 |     ) -> None:
treefmt-check> 91 |         self.scheduled_runs.append((project_id, schedule_name, effect))
treefmt-check>    |
treefmt-check> 
treefmt-check> Found 1 error.
treefmt-check> 
treefmt-check> traversed 228 files
treefmt-check> emitted 191 files for processing
treefmt-check> formatted 58 files (1 changed) in 9.548s
treefmt-check> Error: failed to finalise formatting: formatting failures detected
error: Cannot build '/nix/store/49vbx2kmnvq640cjk14p254qp90fwv0n-treefmt-check.drv'.
       Reason: builder failed with exit code 1.
       Output paths:
         /nix/store/2lx95gyal55l1cy9awd6l6xzjiq35q6a-treefmt-check
       Last 18 log lines:
       > treefmt v2.5.0ERRO formatter | ruff-check[1]: failed to apply with options '[check --fix]': exit status 1
       >
       > ARG002 Unused method argument: `when_spec`
       >   --> nixbot/nixbot/tests/test_control.py:89:65
       >    |
       > 88 |     async def run_scheduled_now(
       > 89 |         self, project_id: int, schedule_name: str, effect: str, when_spec: str
       >    |                                                                 ^^^^^^^^^
       > 90 |     ) -> None:
       > 91 |         self.scheduled_runs.append((project_id, schedule_name, effect))
       >    |
       >
       > Found 1 error.
       >
       > traversed 228 files
       > emitted 191 files for processing
       > formatted 58 files (1 changed) in 9.548s
       > Error: failed to finalise formatting: formatting failures detected
       For full logs, run:
         nix log /nix/store/49vbx2kmnvq640cjk14p254qp90fwv0n-treefmt-check.drv