this derivation will be built:
  /nix/store/wz4219pjsb0x70q9pjbd0lbp8rbyl8p7-harmonia-llvm-cov-3.3.0.drv
error: Cannot build '/nix/store/wz4219pjsb0x70q9pjbd0lbp8rbyl8p7-harmonia-llvm-cov-3.3.0.drv'.
       Reason: builder failed with exit code 100.
       Output paths:
         /nix/store/fkvhi895ff3vq6s8kzdrf3mw8vjnld16-harmonia-llvm-cov-3.3.0
       Last 25 log lines:
       >         PASS [   0.057s] (1516/2515) harmonia-protocol ser::writer::unittests::test_write_slice::case_08_seven::chunks_size_09_9::buf_size_05_5
       >         PASS [   0.057s] (1517/2515) harmonia-protocol ser::writer::unittests::test_write_slice::case_08_seven::chunks_size_09_9::buf_size_07_7
       >         PASS [   0.057s] (1518/2515) harmonia-protocol ser::writer::unittests::test_write_slice::case_08_seven::chunks_size_09_9::buf_size_08_8
       >         PASS [   0.056s] (1519/2515) harmonia-protocol ser::writer::unittests::test_write_slice::case_08_seven::chunks_size_09_9::buf_size_10_1024
       >         PASS [   0.876s] (1520/2515) harmonia-cache::error_responses serve_missing_file_does_not_leak_fs_path
       >         PASS [   0.876s] (1521/2515) harmonia-cache::realisations test_build_trace_endpoint
       >         PASS [   0.057s] (1522/2515) harmonia-protocol ser::writer::unittests::test_write_slice::case_08_seven::chunks_size_09_9::buf_size_09_9
       >         PASS [   0.877s] (1523/2515) harmonia-cache::prometheus test_prometheus_metrics
       >         PASS [   0.878s] (1524/2515) harmonia-cache::security_xss serve_directory_listing_escapes_filenames_in_href
       >         PASS [   0.882s] (1525/2515) harmonia-cache::tls test_tls
       >         PASS [   0.902s] (1526/2515) harmonia-cache::security_xss landing_page_escapes_host_and_proto_headers
       >         PASS [   0.910s] (1527/2515) harmonia-cache::endpoints test_root_endpoint
       >         PASS [   0.934s] (1528/2515) harmonia-cache::endpoints test_health_endpoint
       >         PASS [   0.935s] (1529/2515) harmonia-cache::endpoints test_root_endpoint_with_signing_keys
       >         PASS [   0.996s] (1530/2515) harmonia-cache::log test_build_log_endpoint
       >         PASS [   1.101s] (1531/2515) harmonia-cache::chroot test_chroot
       >         PASS [   1.482s] (1532/2515) harmonia-file-nar archive::parser::unittests::proptest_parse_stream
       >         PASS [   2.372s] (1533/2515) harmonia-protocol ser::mock::proptests::proptest_mock
       >         PASS [   2.635s] (1534/2515) harmonia-file-nar archive::restorer::proptests::proptest_restore_dump
       >         PASS [  24.780s] (1535/2515) harmonia-cache::retry test_download_retry_over_flaky_connection
       > ────────────
       >      Summary [  24.783s] 1535/2515 tests run: 1534 passed, 1 failed, 0 skipped
       >         FAIL [   0.818s] (1408/2515) harmonia-cache::signing test_signing
       > warning: 980/2515 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/wz4219pjsb0x70q9pjbd0lbp8rbyl8p7-harmonia-llvm-cov-3.3.0.drv