this derivation will be built:
  /nix/store/zlsbmdy9kv9p2i2b0cyblg4hfjgfn5a2-harmonia-llvm-cov-3.3.0.drv
error: Cannot build '/nix/store/zlsbmdy9kv9p2i2b0cyblg4hfjgfn5a2-harmonia-llvm-cov-3.3.0.drv'.
       Reason: builder failed with exit code 100.
       Output paths:
         /nix/store/476rmzq1l2vg00d5ggz3gbsp4nhp3akl-harmonia-llvm-cov-3.3.0
       Last 25 log lines:
       >         PASS [   1.313s] (2079/2515) harmonia-cache::signing test_signing
       >         PASS [   0.742s] (2080/2515) harmonia-store-gc::integration gc_dry_run_counts_unknown_on_disk
       >         PASS [   0.744s] (2081/2515) harmonia-store-gc::integration gc_deletes_unreferenced_paths
       >         PASS [   0.776s] (2082/2515) harmonia-store-gc::integration gc_dry_run_does_not_delete
       >         PASS [   0.778s] (2083/2515) harmonia-store-gc::integration gc_deletes_drv_when_output_deriver_is_unset
       >         PASS [   0.796s] (2084/2515) harmonia-store-gc::integration gc_deletes_non_utf8_store_entry
       >         PASS [   0.801s] (2085/2515) harmonia-store-gc::integration gc_does_not_hang_on_tmp_fifo
       >         PASS [   0.811s] (2086/2515) harmonia-store-gc::integration gc_drops_partial_temp_root
       >         PASS [   0.877s] (2087/2515) harmonia-store-gc::integration gc_cleans_unused_links_only_when_not_dry_run
       >         PASS [   0.998s] (2088/2515) harmonia-store-aterm input_address::tests::fill_outputs_consistent_with_make_output_path
       >         PASS [   0.999s] (2089/2515) harmonia-store-aterm input_address::tests::hash_derivation_deterministic
       >         PASS [   1.007s] (2090/2515) harmonia-store-aterm input_address::tests::fill_outputs_updates_env
       >         PASS [   1.848s] (2091/2515) harmonia-file-nar archive::parser::unittests::proptest_parse_stream
       >         PASS [   1.307s] (2092/2515) harmonia-store-gc gc_socket::stress_tests::concurrent_clients_never_resurrect_deleted_paths
       >         PASS [   1.682s] (2093/2515) harmonia-store-aterm input_address::tests::hash_derivation_varies
       >         PASS [   2.446s] (2094/2515) harmonia-file-nar archive::restorer::proptests::proptest_restore_dump
       >         PASS [   3.096s] (2095/2515) harmonia-protocol ser::mock::proptests::proptest_mock
       >         PASS [  12.271s] (2096/2515) harmonia-protocol wire_roundtrip::roundtrip_query_missing_result
       >         PASS [  25.155s] (2097/2515) harmonia-cache::retry test_download_retry_over_flaky_connection
       > ────────────
       >      Summary [  25.156s] 2097/2515 tests run: 2095 passed, 2 failed, 0 skipped
       >         FAIL [   0.010s] (1970/2515) harmonia-store-derivation::json_upstream derived_path::test_derived_path_built::to_json
       >         FAIL [   0.030s] (2000/2515) harmonia-store-derivation::json_upstream derived_path::test_derived_path_built::from_json
       > warning: 418/2515 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/zlsbmdy9kv9p2i2b0cyblg4hfjgfn5a2-harmonia-llvm-cov-3.3.0.drv