this derivation will be built:
  /nix/store/vcx11ax77fqzwpsdipcnxaz49j2g29l4-treefmt-check.drv
error: Cannot build '/nix/store/vcx11ax77fqzwpsdipcnxaz49j2g29l4-treefmt-check.drv'.
       Reason: builder failed with exit code 1.
       Output paths:
         /nix/store/8s6c3i70slgmnr3vq63bmph6k1wz7l6q-treefmt-check
       Last 25 log lines:
       > +    assert (
       > +        expression.read_text()
       > +        == """patches = [
       >    ./keep.patch
       >  ];
       >  """
       > +    )
       >
       >
       >  def test_arbitrary_patch_expression_is_removed_by_index(tmp_path: Path) -> None:
       > @@ -38,10 +41,13 @@ def test_arbitrary_patch_expression_is_removed_by_index(tmp_path: Path) -> None:
       >
       >      drop_patch_indices(str(expression), 1, {1})
       >
       > -    assert expression.read_text() == """patches = [
       > +    assert (
       > +        expression.read_text()
       > +        == """patches = [
       >    ./fix.patch
       >  ];
       >  """
       > +    )
       >
       >
       >  def test_compact_patch_list_entry_is_removed(tmp_path: Path) -> None:
       For full logs, run:
         nix log /nix/store/vcx11ax77fqzwpsdipcnxaz49j2g29l4-treefmt-check.drv