this derivation will be built:
  /nix/store/yfx8b8d091jn35sryg8lz6f11l3jl1yx-harmonia-llvm-cov-3.2.0.drv
error: Cannot build '/nix/store/yfx8b8d091jn35sryg8lz6f11l3jl1yx-harmonia-llvm-cov-3.2.0.drv'.
       Reason: builder failed with exit code 100.
       Output paths:
         /nix/store/wmaj6779qih82qdgdds20360xiz8d5bw-harmonia-llvm-cov-3.2.0
       Last 25 log lines:
       >         PASS [   0.085s] (1496/2330) harmonia-protocol ser::writer::unittests::test_write_slice::case_09_aligned::chunks_size_04_4::buf_size_02_2
       >         PASS [   0.150s] (1497/2330) harmonia-protocol ser::writer::unittests::test_write_slice::case_08_seven::chunks_size_02_2::buf_size_08_8
       >         PASS [   0.095s] (1498/2330) harmonia-protocol ser::writer::unittests::test_write_slice::case_09_aligned::chunks_size_01_1::buf_size_08_8
       >         PASS [   0.508s] (1499/2330) harmonia-cache::unix test_unix_socket
       >         PASS [   0.528s] (1500/2330) harmonia-cache::socket_activation test_socket_activation_tcp
       >         PASS [   0.594s] (1501/2330) harmonia-cache::endpoints test_root_endpoint
       >         PASS [   0.599s] (1502/2330) harmonia-cache::endpoints test_root_endpoint_with_signing_keys
       >         PASS [   0.600s] (1503/2330) harmonia-cache::security_xss landing_page_escapes_host_and_proto_headers
       >         PASS [   0.610s] (1504/2330) harmonia-cache::prometheus test_prometheus_metrics
       >         PASS [   0.635s] (1505/2330) harmonia-cache::endpoints test_health_endpoint
       >         PASS [   0.642s] (1506/2330) harmonia-cache::tls test_tls
       >         PASS [   0.660s] (1507/2330) harmonia-cache::security_xss serve_directory_listing_escapes_filenames_in_href
       >         PASS [   0.698s] (1508/2330) harmonia-cache::security_paths malformed_hash_is_4xx_not_5xx
       >         PASS [   0.737s] (1509/2330) harmonia-cache::error_responses serve_missing_file_does_not_leak_fs_path
       >         PASS [   0.762s] (1510/2330) harmonia-cache::log test_build_log_endpoint
       >         PASS [   0.857s] (1511/2330) harmonia-cache::signing test_signing
       >         PASS [   0.870s] (1512/2330) harmonia-cache::chroot test_chroot
       >         PASS [   2.367s] (1513/2330) harmonia-protocol ser::mock::proptests::proptest_mock
       >         PASS [   2.583s] (1514/2330) harmonia-file-nar archive::restorer::proptests::proptest_restore_dump
       >         PASS [  25.070s] (1515/2330) harmonia-cache::retry test_download_retry_over_flaky_connection
       > ────────────
       >      Summary [  25.073s] 1515/2330 tests run: 1514 passed, 1 failed, 0 skipped
       >         FAIL [   0.413s] (1132/2330) harmonia-cache::realisations test_build_trace_endpoint
       > warning: 815/2330 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/yfx8b8d091jn35sryg8lz6f11l3jl1yx-harmonia-llvm-cov-3.2.0.drv