this derivation will be built:
  /nix/store/16jlkybrvqv8xk6b7hrn6d77maqwwrz3-iets-nextest-0.1.0.drv
error: Cannot build '/nix/store/16jlkybrvqv8xk6b7hrn6d77maqwwrz3-iets-nextest-0.1.0.drv'.
       Reason: builder failed with exit code 100.
       Output paths:
         /nix/store/rpxls90fzqd1yxz1qmnkbi4rni3glhsf-iets-nextest-0.1.0
       Last 25 log lines:
       >         PASS [  26.058s] (513/520) iets::cli dash_f_names_the_file_in_the_native_namespace
       >         PASS [  37.108s] (514/520) iets builtins::fetch::tests::the_name_on_a_value_that_is_not_a_tree_is_silent
       >         PASS [  40.568s] (515/520) iets api::run::tests::helper_fibers_read_the_ir_cache
       >         PASS [  24.551s] (516/520) iets::profile a_folded_line_is_a_stack_and_a_count
       >         PASS [  47.724s] (517/520) iets eval::tests::pure_eval_answers_like_nix
       >         PASS [  33.172s] (518/520) iets::profile an_allocation_profile_accounts_for_the_arena
       >         PASS [  55.659s] (519/520) iets syntax::tests::deep_nesting_ends_with_an_error
       >         SLOW [> 60.000s] (-------) iets runtime::value::tests::union_iteration_merges_like_a_fold
       >         SLOW [>120.000s] (-------) iets runtime::value::tests::union_iteration_merges_like_a_fold
       >         SLOW [>180.000s] (-------) iets runtime::value::tests::union_iteration_merges_like_a_fold
       >         SLOW [>240.000s] (-------) iets runtime::value::tests::union_iteration_merges_like_a_fold
       >         SLOW [>300.000s] (-------) iets runtime::value::tests::union_iteration_merges_like_a_fold
       >         SLOW [>360.000s] (-------) iets runtime::value::tests::union_iteration_merges_like_a_fold
       >         SLOW [>420.000s] (-------) iets runtime::value::tests::union_iteration_merges_like_a_fold
       >         SLOW [>480.000s] (-------) iets runtime::value::tests::union_iteration_merges_like_a_fold
       >         SLOW [>540.000s] (-------) iets runtime::value::tests::union_iteration_merges_like_a_fold
       >         SLOW [>600.000s] (-------) iets runtime::value::tests::union_iteration_merges_like_a_fold
       >         SLOW [>660.000s] (-------) iets runtime::value::tests::union_iteration_merges_like_a_fold
       >         SLOW [>720.000s] (-------) iets runtime::value::tests::union_iteration_merges_like_a_fold
       >         SLOW [>780.000s] (-------) iets runtime::value::tests::union_iteration_merges_like_a_fold
       >         PASS [ 806.387s] (520/520) iets runtime::value::tests::union_iteration_merges_like_a_fold
       > ------------
       >      Summary [ 812.101s] 520 tests run: 519 passed (1 slow), 1 failed, 5 skipped
       >         FAIL [  14.559s] (483/520) iets::events a_text_add_names_its_size_and_its_position
       > error: test run failed
       For full logs, run:
         nix log /nix/store/16jlkybrvqv8xk6b7hrn6d77maqwwrz3-iets-nextest-0.1.0.drv