this derivation will be built:
  /nix/store/hfc6380qgqsqig9igvzkim935bapzxyb-treefmt-check.drv
building '/nix/store/hfc6380qgqsqig9igvzkim935bapzxyb-treefmt-check.drv' on 'ssh-ng://customer@mac02.m.ntd.one'
building '/nix/store/hfc6380qgqsqig9igvzkim935bapzxyb-treefmt-check.drv'
treefmt-check> treefmt v2.5.0traversed 157 files
treefmt-check> emitted 93 files for processing
treefmt-check> formatted 93 files (2 changed) in 1.656s
treefmt-check>  M packages/harvest-invoicer/src/harvest_invoicer/app.py
treefmt-check>  M packages/harvest-invoicer/tests/test_app.py
treefmt-check> diff --git a/packages/harvest-invoicer/src/harvest_invoicer/app.py b/packages/harvest-invoicer/src/harvest_invoicer/app.py
treefmt-check> index 9b06d9b..ffa4806 100644
treefmt-check> --- a/packages/harvest-invoicer/src/harvest_invoicer/app.py
treefmt-check> +++ b/packages/harvest-invoicer/src/harvest_invoicer/app.py
treefmt-check> @@ -406,6 +406,7 @@ def create_app(
treefmt-check>          clients_map: dict[str, dict[str, str]] = app.state["clients"]  # type: ignore[attr-defined]
treefmt-check>          key = request.form.get("client_key", "").strip()
treefmt-check>          entry = clients_map.get(key)
treefmt-check> +
treefmt-check>          def rows_and_totals() -> Response:
treefmt-check>              return Response(
treefmt-check>                  _render_rows(inv) + _render_totals(inv), content_type="text/html"
treefmt-check> diff --git a/packages/harvest-invoicer/tests/test_app.py b/packages/harvest-invoicer/tests/test_app.py
treefmt-check> index 310115e..0996406 100644
treefmt-check> --- a/packages/harvest-invoicer/tests/test_app.py
treefmt-check> +++ b/packages/harvest-invoicer/tests/test_app.py
treefmt-check> @@ -420,9 +420,7 @@ class TestBillToSwitch:
treefmt-check>          assert b"Domestic S.L." in preview.data
treefmt-check>          assert b"Numtide Sarl" not in preview.data
treefmt-check>  
treefmt-check> -    def test_switch_applies_vat_and_extras_keeps_lines(
treefmt-check> -        self, tmp_path: Path
treefmt-check> -    ) -> None:
treefmt-check> +    def test_switch_applies_vat_and_extras_keeps_lines(self, tmp_path: Path) -> None:
treefmt-check>          app = self._make_app(tmp_path)
treefmt-check>          with app.test_client() as c:
treefmt-check>              # Edit a harvest line first: the edit must survive the switch
error: build of '/nix/store/hfc6380qgqsqig9igvzkim935bapzxyb-treefmt-check.drv' on 'ssh-ng://customer@mac02.m.ntd.one' failed: Cannot build '/nix/store/hfc6380qgqsqig9igvzkim935bapzxyb-treefmt-check.drv'.
       Reason: builder failed with exit code 1.
       Output paths:
         /nix/store/l79h6rz9v6qdhv8c4qg99pdk4diydixf-treefmt-check
       Last 25 log lines:
       > --- a/packages/harvest-invoicer/src/harvest_invoicer/app.py
       > +++ b/packages/harvest-invoicer/src/harvest_invoicer/app.py
       > @@ -406,6 +406,7 @@ def create_app(
       >          clients_map: dict[str, dict[str, str]] = app.state["clients"]  # type: ignore[attr-defined]
       >          key = request.form.get("client_key", "").strip()
       >          entry = clients_map.get(key)
       > +
       >          def rows_and_totals() -> Response:
       >              return Response(
       >                  _render_rows(inv) + _render_totals(inv), content_type="text/html"
       > diff --git a/packages/harvest-invoicer/tests/test_app.py b/packages/harvest-invoicer/tests/test_app.py
       > index 310115e..0996406 100644
       > --- a/packages/harvest-invoicer/tests/test_app.py
       > +++ b/packages/harvest-invoicer/tests/test_app.py
       > @@ -420,9 +420,7 @@ class TestBillToSwitch:
       >          assert b"Domestic S.L." in preview.data
       >          assert b"Numtide Sarl" not in preview.data
       >  
       > -    def test_switch_applies_vat_and_extras_keeps_lines(
       > -        self, tmp_path: Path
       > -    ) -> None:
       > +    def test_switch_applies_vat_and_extras_keeps_lines(self, tmp_path: Path) -> None:
       >          app = self._make_app(tmp_path)
       >          with app.test_client() as c:
       >              # Edit a harvest line first: the edit must survive the switch
       For full logs, run:
         nix log /nix/store/hfc6380qgqsqig9igvzkim935bapzxyb-treefmt-check.drv
error: Cannot build '/nix/store/hfc6380qgqsqig9igvzkim935bapzxyb-treefmt-check.drv'.
       Reason: builder failed with exit code 1.
       Output paths:
         /nix/store/l79h6rz9v6qdhv8c4qg99pdk4diydixf-treefmt-check