this derivation will be built:
  /nix/store/dhhq5c98n30bpcvj2s1a6hvbjxc2w7jf-treefmt-check.drv
error: Cannot build '/nix/store/dhhq5c98n30bpcvj2s1a6hvbjxc2w7jf-treefmt-check.drv'.
       Reason: builder failed with exit code 1.
       Output paths:
         /nix/store/vn1hb05dlyrj4fw59rhzh6hqk5vsxlda-treefmt-check
       Last 20 log lines:
       > tribuchet: building on jamie
       > treefmt v2.5.0traversed 246 files
       > emitted 206 files for processing
       > formatted 206 files (1 changed) in 6.677s
       >  M nixbot/nixbot/tests/test_executor.py
       > diff --git a/nixbot/nixbot/tests/test_executor.py b/nixbot/nixbot/tests/test_executor.py
       > index e1aec1c..1cf8878 100644
       > --- a/nixbot/nixbot/tests/test_executor.py
       > +++ b/nixbot/nixbot/tests/test_executor.py
       > @@ -788,9 +788,7 @@ def test_scrapes_cannot_build_reason_wording() -> None:
       >          "       Output paths:\n"
       >          "         /nix/store/7bs-closure-info"
       >      )
       > -    cap.setup_line(
       > -        f"error: Cannot build '{top}'.\n       Reason: 1 dependency failed."
       > -    )
       > +    cap.setup_line(f"error: Cannot build '{top}'.\n       Reason: 1 dependency failed.")
       >      cap.mark_failed(top)
       >      state = {e["name"]: e["status"] for e in cap.state()}
       >      # Leaf flagged with its output; no phantom top-level card, setup neutral.
       For full logs, run:
         nix log /nix/store/dhhq5c98n30bpcvj2s1a6hvbjxc2w7jf-treefmt-check.drv