this derivation will be built:
  /nix/store/3ww9y5ifhahqdld95dawzrk7rj6f0smj-harmonia-llvm-cov-3.3.0.drv
error: Cannot build '/nix/store/3ww9y5ifhahqdld95dawzrk7rj6f0smj-harmonia-llvm-cov-3.3.0.drv'.
       Reason: builder failed with exit code 100.
       Output paths:
         /nix/store/y2ss9fnshadkr7fjz9xb71v13f0rqbm5-harmonia-llvm-cov-3.3.0
       Last 25 log lines:
       >         PASS [   5.439s] (2157/2515) harmonia-file-nar archive::parser::unittests::proptest_parse_stream
       >         PASS [   4.713s] (2158/2515) harmonia-store-gc::integration gc_removes_stale_temp_roots_file
       >         PASS [   4.823s] (2159/2515) harmonia-store-gc::integration gc_rebases_canonical_runtime_roots_to_logical_store
       >         PASS [   4.896s] (2160/2515) harmonia-store-derivation derived_path::path::unittests::proptest_single_derived_path_display_parse
       >         PASS [   5.042s] (2161/2515) harmonia-store-gc::integration gc_skips_locked_tmp_dir
       >         PASS [   5.056s] (2162/2515) harmonia-store-gc::integration gc_dry_run_counts_unknown_on_disk
       >         PASS [   5.064s] (2163/2515) harmonia-store-gc::integration gc_keeps_ca_outputs_of_alive_drv
       >         PASS [   5.075s] (2164/2515) harmonia-store-gc::integration gc_keep_recent_pins_recently_registered
       >         PASS [   5.615s] (2165/2515) harmonia-store-aterm input_address::tests::hash_derivation_varies
       >         PASS [   5.987s] (2166/2515) harmonia-store-gc::integration gc_socket_serves_before_graph_load_and_keeps_early_roots
       >         PASS [   6.006s] (2167/2515) harmonia-store-gc::integration gc_scans_roots_despite_unfollowable_indirect_target
       >         PASS [   6.027s] (2168/2515) harmonia-store-gc::integration gc_keeps_temp_root_not_yet_in_db
       >         PASS [   6.067s] (2169/2515) harmonia-store-gc::integration gc_deletes_unreferenced_paths
       >         PASS [   6.254s] (2170/2515) harmonia-store-gc::integration gc_cleans_unused_links_only_when_not_dry_run
       >         PASS [   8.173s] (2171/2515) harmonia-file-nar archive::restorer::proptests::proptest_restore_dump
       >         PASS [   9.262s] (2172/2515) harmonia-protocol ser::mock::proptests::proptest_mock
       >         PASS [  16.506s] (2173/2515) harmonia-store-gc::integration gc_vacuums_db_after_mass_deletion
       >         PASS [  26.113s] (2174/2515) harmonia-cache::retry test_download_retry_over_flaky_connection
       >         PASS [  46.981s] (2175/2515) harmonia-protocol wire_roundtrip::roundtrip_query_missing_result
       > ────────────
       >      Summary [  47.541s] 2175/2515 tests run: 2173 passed, 2 failed, 0 skipped
       >         FAIL [   0.055s] (1989/2515) harmonia-store-derivation::json_upstream derived_path::test_derived_path_built::from_json
       >         FAIL [   0.056s] (2004/2515) harmonia-store-derivation::json_upstream derived_path::test_derived_path_built::to_json
       > warning: 340/2515 tests were not run due to test failure (run with --no-fail-fast to run all tests, or run with --max-fail)
       > error: test run failed
       For full logs, run:
         nix log /nix/store/3ww9y5ifhahqdld95dawzrk7rj6f0smj-harmonia-llvm-cov-3.3.0.drv